xref: /llvm-project/libcxx/test/std/numerics/c.math/cmath.pass.cpp (revision 59f05239dbbc2c37d9de2bf638a64e1e9abd9163) 
1 //===----------------------------------------------------------------------===//
2 //
3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4 // See https://llvm.org/LICENSE.txt for license information.
5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
6 //
7 //===----------------------------------------------------------------------===//
8 
9 // This test fails because Clang no longer enables -fdelayed-template-parsing
10 // by default on Windows with C++20 (#69431).
11 // XFAIL: msvc && (clang-18 || clang-19)
12 
13 // <cmath>
14 
15 #include <cmath>
16 #include <limits>
17 #include <type_traits>
18 #include <cassert>
19 
20 #include "test_macros.h"
21 #include "hexfloat.h"
22 #include "truncate_fp.h"
23 
24 // convertible to int/float/double/etc
25 template <class T, int N=0>
26 struct Value {
27     operator T () { return T(N); }
28 };
29 
30 // See PR21083
31 // Ambiguous is a user-defined type that defines its own overloads of cmath
32 // functions. When the std overloads are candidates too (by using or adl),
33 // they should not interfere.
34 struct Ambiguous : std::true_type { // ADL
35     operator float () { return 0.f; }
36     operator double () { return 0.; }
37 };
38 Ambiguous abs(Ambiguous){ return Ambiguous(); }
39 Ambiguous acos(Ambiguous){ return Ambiguous(); }
40 Ambiguous asin(Ambiguous){ return Ambiguous(); }
41 Ambiguous atan(Ambiguous){ return Ambiguous(); }
42 Ambiguous atan2(Ambiguous, Ambiguous){ return Ambiguous(); }
43 Ambiguous ceil(Ambiguous){ return Ambiguous(); }
44 Ambiguous cos(Ambiguous){ return Ambiguous(); }
45 Ambiguous cosh(Ambiguous){ return Ambiguous(); }
46 Ambiguous exp(Ambiguous){ return Ambiguous(); }
47 Ambiguous fabs(Ambiguous){ return Ambiguous(); }
48 Ambiguous floor(Ambiguous){ return Ambiguous(); }
49 Ambiguous fmod(Ambiguous, Ambiguous){ return Ambiguous(); }
50 Ambiguous frexp(Ambiguous, int*){ return Ambiguous(); }
51 Ambiguous ldexp(Ambiguous, int){ return Ambiguous(); }
52 Ambiguous log(Ambiguous){ return Ambiguous(); }
53 Ambiguous log10(Ambiguous){ return Ambiguous(); }
54 Ambiguous modf(Ambiguous, Ambiguous*){ return Ambiguous(); }
55 Ambiguous pow(Ambiguous, Ambiguous){ return Ambiguous(); }
56 Ambiguous sin(Ambiguous){ return Ambiguous(); }
57 Ambiguous sinh(Ambiguous){ return Ambiguous(); }
58 Ambiguous sqrt(Ambiguous){ return Ambiguous(); }
59 Ambiguous tan(Ambiguous){ return Ambiguous(); }
60 Ambiguous tanh(Ambiguous){ return Ambiguous(); }
61 Ambiguous signbit(Ambiguous){ return Ambiguous(); }
62 Ambiguous fpclassify(Ambiguous){ return Ambiguous(); }
63 Ambiguous isfinite(Ambiguous){ return Ambiguous(); }
64 Ambiguous isnormal(Ambiguous){ return Ambiguous(); }
65 Ambiguous isgreater(Ambiguous, Ambiguous){ return Ambiguous(); }
66 Ambiguous isgreaterequal(Ambiguous, Ambiguous){ return Ambiguous(); }
67 Ambiguous isless(Ambiguous, Ambiguous){ return Ambiguous(); }
68 Ambiguous islessequal(Ambiguous, Ambiguous){ return Ambiguous(); }
69 Ambiguous islessgreater(Ambiguous, Ambiguous){ return Ambiguous(); }
70 Ambiguous isunordered(Ambiguous, Ambiguous){ return Ambiguous(); }
71 Ambiguous acosh(Ambiguous){ return Ambiguous(); }
72 Ambiguous asinh(Ambiguous){ return Ambiguous(); }
73 Ambiguous atanh(Ambiguous){ return Ambiguous(); }
74 Ambiguous cbrt(Ambiguous){ return Ambiguous(); }
75 Ambiguous copysign(Ambiguous, Ambiguous){ return Ambiguous(); }
76 Ambiguous erf(Ambiguous){ return Ambiguous(); }
77 Ambiguous erfc(Ambiguous){ return Ambiguous(); }
78 Ambiguous exp2(Ambiguous){ return Ambiguous(); }
79 Ambiguous expm1(Ambiguous){ return Ambiguous(); }
80 Ambiguous fdim(Ambiguous, Ambiguous){ return Ambiguous(); }
81 Ambiguous fma(Ambiguous, Ambiguous, Ambiguous){ return Ambiguous(); }
82 Ambiguous fmax(Ambiguous, Ambiguous){ return Ambiguous(); }
83 Ambiguous fmin(Ambiguous, Ambiguous){ return Ambiguous(); }
84 Ambiguous hypot(Ambiguous, Ambiguous){ return Ambiguous(); }
85 Ambiguous hypot(Ambiguous, Ambiguous, Ambiguous){ return Ambiguous(); }
86 Ambiguous ilogb(Ambiguous){ return Ambiguous(); }
87 Ambiguous lerp(Ambiguous, Ambiguous, Ambiguous){ return Ambiguous(); }
88 Ambiguous lgamma(Ambiguous){ return Ambiguous(); }
89 Ambiguous llrint(Ambiguous){ return Ambiguous(); }
90 Ambiguous llround(Ambiguous){ return Ambiguous(); }
91 Ambiguous log1p(Ambiguous){ return Ambiguous(); }
92 Ambiguous log2(Ambiguous){ return Ambiguous(); }
93 Ambiguous logb(Ambiguous){ return Ambiguous(); }
94 Ambiguous lrint(Ambiguous){ return Ambiguous(); }
95 Ambiguous lround(Ambiguous){ return Ambiguous(); }
96 Ambiguous nearbyint(Ambiguous){ return Ambiguous(); }
97 Ambiguous nextafter(Ambiguous, Ambiguous){ return Ambiguous(); }
98 Ambiguous nexttoward(Ambiguous, Ambiguous){ return Ambiguous(); }
99 Ambiguous remainder(Ambiguous, Ambiguous){ return Ambiguous(); }
100 Ambiguous remquo(Ambiguous, Ambiguous, int*){ return Ambiguous(); }
101 Ambiguous rint(Ambiguous){ return Ambiguous(); }
102 Ambiguous round(Ambiguous){ return Ambiguous(); }
103 Ambiguous scalbln(Ambiguous, Ambiguous){ return Ambiguous(); }
104 Ambiguous scalbn(Ambiguous, Ambiguous){ return Ambiguous(); }
105 Ambiguous tgamma(Ambiguous){ return Ambiguous(); }
106 Ambiguous trunc(Ambiguous){ return Ambiguous(); }
107 
108 template <class T, class = decltype(std::abs(std::declval<T>()))>
109 std::true_type has_abs_imp(int);
110 template <class T>
111 std::false_type has_abs_imp(...);
112 
113 template <class T>
114 struct has_abs : decltype(has_abs_imp<T>(0)) {};
115 
116 void test_abs()
117 {
118     // See also "abs.pass.cpp"
119 
120     TEST_DIAGNOSTIC_PUSH
121     TEST_CLANG_DIAGNOSTIC_IGNORED("-Wabsolute-value")
122 
123     static_assert((std::is_same<decltype(std::abs((float)0)), float>::value), "");
124     static_assert((std::is_same<decltype(std::abs((double)0)), double>::value), "");
125     static_assert((std::is_same<decltype(std::abs((long double)0)), long double>::value), "");
126     static_assert((std::is_same<decltype(std::abs((int)0)), int>::value), "");
127     static_assert((std::is_same<decltype(std::abs((long)0)), long>::value), "");
128     static_assert((std::is_same<decltype(std::abs((long long)0)), long long>::value), "");
129     static_assert((std::is_same<decltype(std::abs((unsigned char)0)), int>::value), "");
130     static_assert((std::is_same<decltype(std::abs((unsigned short)0)), int>::value), "");
131     static_assert((std::is_same<decltype(std::abs((signed char)0)), int>::value), "");
132     static_assert((std::is_same<decltype(std::abs((short)0)), int>::value), "");
133     static_assert((std::is_same<decltype(std::abs((unsigned char)0)), int>::value), "");
134     static_assert((std::is_same<decltype(std::abs((char)0)), int>::value), "");
135     static_assert((std::is_same<decltype(abs(Ambiguous())), Ambiguous>::value), "");
136 
137     static_assert(!has_abs<unsigned>::value, "");
138     static_assert(!has_abs<unsigned long>::value, "");
139     static_assert(!has_abs<unsigned long long>::value, "");
140     static_assert(!has_abs<std::size_t>::value, "");
141 
142     TEST_DIAGNOSTIC_POP
143 
144     assert(std::abs(-1.) == 1);
145 }
146 
147 
148 void test_acos()
149 {
150     static_assert((std::is_same<decltype(std::acos((float)0)), float>::value), "");
151     static_assert((std::is_same<decltype(std::acos((bool)0)), double>::value), "");
152     static_assert((std::is_same<decltype(std::acos((unsigned short)0)), double>::value), "");
153     static_assert((std::is_same<decltype(std::acos((int)0)), double>::value), "");
154     static_assert((std::is_same<decltype(std::acos((unsigned int)0)), double>::value), "");
155     static_assert((std::is_same<decltype(std::acos((long)0)), double>::value), "");
156     static_assert((std::is_same<decltype(std::acos((unsigned long)0)), double>::value), "");
157     static_assert((std::is_same<decltype(std::acos((long long)0)), double>::value), "");
158     static_assert((std::is_same<decltype(std::acos((unsigned long long)0)), double>::value), "");
159     static_assert((std::is_same<decltype(std::acos((double)0)), double>::value), "");
160     static_assert((std::is_same<decltype(std::acos((long double)0)), long double>::value), "");
161     static_assert((std::is_same<decltype(std::acosf(0)), float>::value), "");
162     static_assert((std::is_same<decltype(std::acosl(0)), long double>::value), "");
163     static_assert((std::is_same<decltype(acos(Ambiguous())), Ambiguous>::value), "");
164     assert(std::acos(1) == 0);
165 }
166 
167 void test_asin()
168 {
169     static_assert((std::is_same<decltype(std::asin((float)0)), float>::value), "");
170     static_assert((std::is_same<decltype(std::asin((bool)0)), double>::value), "");
171     static_assert((std::is_same<decltype(std::asin((unsigned short)0)), double>::value), "");
172     static_assert((std::is_same<decltype(std::asin((int)0)), double>::value), "");
173     static_assert((std::is_same<decltype(std::asin((unsigned int)0)), double>::value), "");
174     static_assert((std::is_same<decltype(std::asin((long)0)), double>::value), "");
175     static_assert((std::is_same<decltype(std::asin((unsigned long)0)), double>::value), "");
176     static_assert((std::is_same<decltype(std::asin((long long)0)), double>::value), "");
177     static_assert((std::is_same<decltype(std::asin((unsigned long long)0)), double>::value), "");
178     static_assert((std::is_same<decltype(std::asin((double)0)), double>::value), "");
179     static_assert((std::is_same<decltype(std::asin((long double)0)), long double>::value), "");
180     static_assert((std::is_same<decltype(std::asinf(0)), float>::value), "");
181     static_assert((std::is_same<decltype(std::asinl(0)), long double>::value), "");
182     static_assert((std::is_same<decltype(asin(Ambiguous())), Ambiguous>::value), "");
183     assert(std::asin(0) == 0);
184 }
185 
186 void test_atan()
187 {
188     static_assert((std::is_same<decltype(std::atan((float)0)), float>::value), "");
189     static_assert((std::is_same<decltype(std::atan((bool)0)), double>::value), "");
190     static_assert((std::is_same<decltype(std::atan((unsigned short)0)), double>::value), "");
191     static_assert((std::is_same<decltype(std::atan((int)0)), double>::value), "");
192     static_assert((std::is_same<decltype(std::atan((unsigned int)0)), double>::value), "");
193     static_assert((std::is_same<decltype(std::atan((long)0)), double>::value), "");
194     static_assert((std::is_same<decltype(std::atan((unsigned long)0)), double>::value), "");
195     static_assert((std::is_same<decltype(std::atan((long long)0)), double>::value), "");
196     static_assert((std::is_same<decltype(std::atan((unsigned long long)0)), double>::value), "");
197     static_assert((std::is_same<decltype(std::atan((double)0)), double>::value), "");
198     static_assert((std::is_same<decltype(std::atan((long double)0)), long double>::value), "");
199     static_assert((std::is_same<decltype(std::atanf(0)), float>::value), "");
200     static_assert((std::is_same<decltype(std::atanl(0)), long double>::value), "");
201     static_assert((std::is_same<decltype(atan(Ambiguous())), Ambiguous>::value), "");
202     assert(std::atan(0) == 0);
203 }
204 
205 void test_atan2()
206 {
207     static_assert((std::is_same<decltype(std::atan2((float)0, (float)0)), float>::value), "");
208     static_assert((std::is_same<decltype(std::atan2((bool)0, (float)0)), double>::value), "");
209     static_assert((std::is_same<decltype(std::atan2((unsigned short)0, (double)0)), double>::value), "");
210     static_assert((std::is_same<decltype(std::atan2((int)0, (long double)0)), long double>::value), "");
211     static_assert((std::is_same<decltype(std::atan2((float)0, (unsigned int)0)), double>::value), "");
212     static_assert((std::is_same<decltype(std::atan2((double)0, (long)0)), double>::value), "");
213     static_assert((std::is_same<decltype(std::atan2((long double)0, (unsigned long)0)), long double>::value), "");
214     static_assert((std::is_same<decltype(std::atan2((int)0, (long long)0)), double>::value), "");
215     static_assert((std::is_same<decltype(std::atan2((int)0, (unsigned long long)0)), double>::value), "");
216     static_assert((std::is_same<decltype(std::atan2((double)0, (double)0)), double>::value), "");
217     static_assert((std::is_same<decltype(std::atan2((long double)0, (long double)0)), long double>::value), "");
218     static_assert((std::is_same<decltype(std::atan2((float)0, (double)0)), double>::value), "");
219     static_assert((std::is_same<decltype(std::atan2((float)0, (long double)0)), long double>::value), "");
220     static_assert((std::is_same<decltype(std::atan2((double)0, (long double)0)), long double>::value), "");
221     static_assert((std::is_same<decltype(std::atan2f(0,0)), float>::value), "");
222     static_assert((std::is_same<decltype(std::atan2l(0,0)), long double>::value), "");
223     static_assert((std::is_same<decltype(std::atan2((int)0, (int)0)), double>::value), "");
224     static_assert((std::is_same<decltype(atan2(Ambiguous(), Ambiguous())), Ambiguous>::value), "");
225     assert(std::atan2(0,1) == 0);
226 }
227 
228 void test_ceil()
229 {
230     static_assert((std::is_same<decltype(std::ceil((float)0)), float>::value), "");
231     static_assert((std::is_same<decltype(std::ceil((bool)0)), double>::value), "");
232     static_assert((std::is_same<decltype(std::ceil((unsigned short)0)), double>::value), "");
233     static_assert((std::is_same<decltype(std::ceil((int)0)), double>::value), "");
234     static_assert((std::is_same<decltype(std::ceil((unsigned int)0)), double>::value), "");
235     static_assert((std::is_same<decltype(std::ceil((long)0)), double>::value), "");
236     static_assert((std::is_same<decltype(std::ceil((unsigned long)0)), double>::value), "");
237     static_assert((std::is_same<decltype(std::ceil((long long)0)), double>::value), "");
238     static_assert((std::is_same<decltype(std::ceil((unsigned long long)0)), double>::value), "");
239     static_assert((std::is_same<decltype(std::ceil((double)0)), double>::value), "");
240     static_assert((std::is_same<decltype(std::ceil((long double)0)), long double>::value), "");
241     static_assert((std::is_same<decltype(std::ceilf(0)), float>::value), "");
242     static_assert((std::is_same<decltype(std::ceill(0)), long double>::value), "");
243     static_assert((std::is_same<decltype(ceil(Ambiguous())), Ambiguous>::value), "");
244     assert(std::ceil(0) == 0);
245 }
246 
247 void test_cos()
248 {
249     static_assert((std::is_same<decltype(std::cos((float)0)), float>::value), "");
250     static_assert((std::is_same<decltype(std::cos((bool)0)), double>::value), "");
251     static_assert((std::is_same<decltype(std::cos((unsigned short)0)), double>::value), "");
252     static_assert((std::is_same<decltype(std::cos((int)0)), double>::value), "");
253     static_assert((std::is_same<decltype(std::cos((unsigned int)0)), double>::value), "");
254     static_assert((std::is_same<decltype(std::cos((long)0)), double>::value), "");
255     static_assert((std::is_same<decltype(std::cos((unsigned long)0)), double>::value), "");
256     static_assert((std::is_same<decltype(std::cos((long long)0)), double>::value), "");
257     static_assert((std::is_same<decltype(std::cos((unsigned long long)0)), double>::value), "");
258     static_assert((std::is_same<decltype(std::cos((double)0)), double>::value), "");
259     static_assert((std::is_same<decltype(std::cos((long double)0)), long double>::value), "");
260     static_assert((std::is_same<decltype(std::cosf(0)), float>::value), "");
261     static_assert((std::is_same<decltype(std::cosl(0)), long double>::value), "");
262     static_assert((std::is_same<decltype(cos(Ambiguous())), Ambiguous>::value), "");
263     assert(std::cos(0) == 1);
264 }
265 
266 void test_cosh()
267 {
268     static_assert((std::is_same<decltype(std::cosh((float)0)), float>::value), "");
269     static_assert((std::is_same<decltype(std::cosh((bool)0)), double>::value), "");
270     static_assert((std::is_same<decltype(std::cosh((unsigned short)0)), double>::value), "");
271     static_assert((std::is_same<decltype(std::cosh((int)0)), double>::value), "");
272     static_assert((std::is_same<decltype(std::cosh((unsigned int)0)), double>::value), "");
273     static_assert((std::is_same<decltype(std::cosh((long)0)), double>::value), "");
274     static_assert((std::is_same<decltype(std::cosh((unsigned long)0)), double>::value), "");
275     static_assert((std::is_same<decltype(std::cosh((long long)0)), double>::value), "");
276     static_assert((std::is_same<decltype(std::cosh((unsigned long long)0)), double>::value), "");
277     static_assert((std::is_same<decltype(std::cosh((double)0)), double>::value), "");
278     static_assert((std::is_same<decltype(std::cosh((long double)0)), long double>::value), "");
279     static_assert((std::is_same<decltype(std::coshf(0)), float>::value), "");
280     static_assert((std::is_same<decltype(std::coshl(0)), long double>::value), "");
281     static_assert((std::is_same<decltype(cosh(Ambiguous())), Ambiguous>::value), "");
282     assert(std::cosh(0) == 1);
283 }
284 
285 void test_exp()
286 {
287     static_assert((std::is_same<decltype(std::exp((float)0)), float>::value), "");
288     static_assert((std::is_same<decltype(std::exp((bool)0)), double>::value), "");
289     static_assert((std::is_same<decltype(std::exp((unsigned short)0)), double>::value), "");
290     static_assert((std::is_same<decltype(std::exp((int)0)), double>::value), "");
291     static_assert((std::is_same<decltype(std::exp((unsigned int)0)), double>::value), "");
292     static_assert((std::is_same<decltype(std::exp((long)0)), double>::value), "");
293     static_assert((std::is_same<decltype(std::exp((unsigned long)0)), double>::value), "");
294     static_assert((std::is_same<decltype(std::exp((long long)0)), double>::value), "");
295     static_assert((std::is_same<decltype(std::exp((unsigned long long)0)), double>::value), "");
296     static_assert((std::is_same<decltype(std::exp((double)0)), double>::value), "");
297     static_assert((std::is_same<decltype(std::exp((long double)0)), long double>::value), "");
298     static_assert((std::is_same<decltype(std::expf(0)), float>::value), "");
299     static_assert((std::is_same<decltype(std::expl(0)), long double>::value), "");
300     static_assert((std::is_same<decltype(exp(Ambiguous())), Ambiguous>::value), "");
301     assert(std::exp(0) == 1);
302 }
303 
304 void test_fabs()
305 {
306     static_assert((std::is_same<decltype(std::fabs((float)0)), float>::value), "");
307     static_assert((std::is_same<decltype(std::fabs((bool)0)), double>::value), "");
308     static_assert((std::is_same<decltype(std::fabs((unsigned short)0)), double>::value), "");
309     static_assert((std::is_same<decltype(std::fabs((int)0)), double>::value), "");
310     static_assert((std::is_same<decltype(std::fabs((unsigned int)0)), double>::value), "");
311     static_assert((std::is_same<decltype(std::fabs((long)0)), double>::value), "");
312     static_assert((std::is_same<decltype(std::fabs((unsigned long)0)), double>::value), "");
313     static_assert((std::is_same<decltype(std::fabs((long long)0)), double>::value), "");
314     static_assert((std::is_same<decltype(std::fabs((unsigned long long)0)), double>::value), "");
315     static_assert((std::is_same<decltype(std::fabs((double)0)), double>::value), "");
316     static_assert((std::is_same<decltype(std::fabs((long double)0)), long double>::value), "");
317     static_assert((std::is_same<decltype(std::fabsf(0.0f)), float>::value), "");
318     static_assert((std::is_same<decltype(std::fabsl(0.0L)), long double>::value), "");
319     static_assert((std::is_same<decltype(fabs(Ambiguous())), Ambiguous>::value), "");
320     assert(std::fabs(-1) == 1);
321 }
322 
323 void test_floor()
324 {
325     static_assert((std::is_same<decltype(std::floor((float)0)), float>::value), "");
326     static_assert((std::is_same<decltype(std::floor((bool)0)), double>::value), "");
327     static_assert((std::is_same<decltype(std::floor((unsigned short)0)), double>::value), "");
328     static_assert((std::is_same<decltype(std::floor((int)0)), double>::value), "");
329     static_assert((std::is_same<decltype(std::floor((unsigned int)0)), double>::value), "");
330     static_assert((std::is_same<decltype(std::floor((long)0)), double>::value), "");
331     static_assert((std::is_same<decltype(std::floor((unsigned long)0)), double>::value), "");
332     static_assert((std::is_same<decltype(std::floor((long long)0)), double>::value), "");
333     static_assert((std::is_same<decltype(std::floor((unsigned long long)0)), double>::value), "");
334     static_assert((std::is_same<decltype(std::floor((double)0)), double>::value), "");
335     static_assert((std::is_same<decltype(std::floor((long double)0)), long double>::value), "");
336     static_assert((std::is_same<decltype(std::floorf(0)), float>::value), "");
337     static_assert((std::is_same<decltype(std::floorl(0)), long double>::value), "");
338     static_assert((std::is_same<decltype(floor(Ambiguous())), Ambiguous>::value), "");
339     assert(std::floor(1) == 1);
340 }
341 
342 void test_fmod()
343 {
344     static_assert((std::is_same<decltype(std::fmod((float)0, (float)0)), float>::value), "");
345     static_assert((std::is_same<decltype(std::fmod((bool)0, (float)0)), double>::value), "");
346     static_assert((std::is_same<decltype(std::fmod((unsigned short)0, (double)0)), double>::value), "");
347     static_assert((std::is_same<decltype(std::fmod((int)0, (long double)0)), long double>::value), "");
348     static_assert((std::is_same<decltype(std::fmod((float)0, (unsigned int)0)), double>::value), "");
349     static_assert((std::is_same<decltype(std::fmod((double)0, (long)0)), double>::value), "");
350     static_assert((std::is_same<decltype(std::fmod((long double)0, (unsigned long)0)), long double>::value), "");
351     static_assert((std::is_same<decltype(std::fmod((int)0, (long long)0)), double>::value), "");
352     static_assert((std::is_same<decltype(std::fmod((int)0, (unsigned long long)0)), double>::value), "");
353     static_assert((std::is_same<decltype(std::fmod((double)0, (double)0)), double>::value), "");
354     static_assert((std::is_same<decltype(std::fmod((long double)0, (long double)0)), long double>::value), "");
355     static_assert((std::is_same<decltype(std::fmod((float)0, (double)0)), double>::value), "");
356     static_assert((std::is_same<decltype(std::fmod((float)0, (long double)0)), long double>::value), "");
357     static_assert((std::is_same<decltype(std::fmod((double)0, (long double)0)), long double>::value), "");
358     static_assert((std::is_same<decltype(std::fmodf(0,0)), float>::value), "");
359     static_assert((std::is_same<decltype(std::fmodl(0,0)), long double>::value), "");
360     static_assert((std::is_same<decltype(std::fmod((int)0, (int)0)), double>::value), "");
361     static_assert((std::is_same<decltype(fmod(Ambiguous(), Ambiguous())), Ambiguous>::value), "");
362     assert(std::fmod(1.5,1) == .5);
363 }
364 
365 void test_frexp()
366 {
367     int ip;
368     static_assert((std::is_same<decltype(std::frexp((float)0, &ip)), float>::value), "");
369     static_assert((std::is_same<decltype(std::frexp((bool)0, &ip)), double>::value), "");
370     static_assert((std::is_same<decltype(std::frexp((unsigned short)0, &ip)), double>::value), "");
371     static_assert((std::is_same<decltype(std::frexp((int)0, &ip)), double>::value), "");
372     static_assert((std::is_same<decltype(std::frexp((unsigned int)0, &ip)), double>::value), "");
373     static_assert((std::is_same<decltype(std::frexp((long)0, &ip)), double>::value), "");
374     static_assert((std::is_same<decltype(std::frexp((unsigned long)0, &ip)), double>::value), "");
375     static_assert((std::is_same<decltype(std::frexp((long long)0, &ip)), double>::value), "");
376     static_assert((std::is_same<decltype(std::frexp((unsigned long long)0, &ip)), double>::value), "");
377     static_assert((std::is_same<decltype(std::frexp((double)0, &ip)), double>::value), "");
378     static_assert((std::is_same<decltype(std::frexp((long double)0, &ip)), long double>::value), "");
379     static_assert((std::is_same<decltype(std::frexpf(0, &ip)), float>::value), "");
380     static_assert((std::is_same<decltype(std::frexpl(0, &ip)), long double>::value), "");
381     static_assert((std::is_same<decltype(frexp(Ambiguous(), &ip)), Ambiguous>::value), "");
382     assert(std::frexp(0, &ip) == 0);
383 }
384 
385 void test_ldexp()
386 {
387     int ip = 1;
388     static_assert((std::is_same<decltype(std::ldexp((float)0, ip)), float>::value), "");
389     static_assert((std::is_same<decltype(std::ldexp((bool)0, ip)), double>::value), "");
390     static_assert((std::is_same<decltype(std::ldexp((unsigned short)0, ip)), double>::value), "");
391     static_assert((std::is_same<decltype(std::ldexp((int)0, ip)), double>::value), "");
392     static_assert((std::is_same<decltype(std::ldexp((unsigned int)0, ip)), double>::value), "");
393     static_assert((std::is_same<decltype(std::ldexp((long)0, ip)), double>::value), "");
394     static_assert((std::is_same<decltype(std::ldexp((unsigned long)0, ip)), double>::value), "");
395     static_assert((std::is_same<decltype(std::ldexp((long long)0, ip)), double>::value), "");
396     static_assert((std::is_same<decltype(std::ldexp((unsigned long long)0, ip)), double>::value), "");
397     static_assert((std::is_same<decltype(std::ldexp((double)0, ip)), double>::value), "");
398     static_assert((std::is_same<decltype(std::ldexp((long double)0, ip)), long double>::value), "");
399     static_assert((std::is_same<decltype(std::ldexpf(0, ip)), float>::value), "");
400     static_assert((std::is_same<decltype(std::ldexpl(0, ip)), long double>::value), "");
401     static_assert((std::is_same<decltype(ldexp(Ambiguous(), ip)), Ambiguous>::value), "");
402     assert(std::ldexp(1, ip) == 2);
403 }
404 
405 void test_log()
406 {
407     static_assert((std::is_same<decltype(std::log((float)0)), float>::value), "");
408     static_assert((std::is_same<decltype(std::log((bool)0)), double>::value), "");
409     static_assert((std::is_same<decltype(std::log((unsigned short)0)), double>::value), "");
410     static_assert((std::is_same<decltype(std::log((int)0)), double>::value), "");
411     static_assert((std::is_same<decltype(std::log((unsigned int)0)), double>::value), "");
412     static_assert((std::is_same<decltype(std::log((long)0)), double>::value), "");
413     static_assert((std::is_same<decltype(std::log((unsigned long)0)), double>::value), "");
414     static_assert((std::is_same<decltype(std::log((long long)0)), double>::value), "");
415     static_assert((std::is_same<decltype(std::log((unsigned long long)0)), double>::value), "");
416     static_assert((std::is_same<decltype(std::log((double)0)), double>::value), "");
417     static_assert((std::is_same<decltype(std::log((long double)0)), long double>::value), "");
418     static_assert((std::is_same<decltype(std::logf(0)), float>::value), "");
419     static_assert((std::is_same<decltype(std::logl(0)), long double>::value), "");
420     static_assert((std::is_same<decltype(log(Ambiguous())), Ambiguous>::value), "");
421     assert(std::log(1) == 0);
422 }
423 
424 void test_log10()
425 {
426     static_assert((std::is_same<decltype(std::log10((float)0)), float>::value), "");
427     static_assert((std::is_same<decltype(std::log10((bool)0)), double>::value), "");
428     static_assert((std::is_same<decltype(std::log10((unsigned short)0)), double>::value), "");
429     static_assert((std::is_same<decltype(std::log10((int)0)), double>::value), "");
430     static_assert((std::is_same<decltype(std::log10((unsigned int)0)), double>::value), "");
431     static_assert((std::is_same<decltype(std::log10((long)0)), double>::value), "");
432     static_assert((std::is_same<decltype(std::log10((unsigned long)0)), double>::value), "");
433     static_assert((std::is_same<decltype(std::log10((long long)0)), double>::value), "");
434     static_assert((std::is_same<decltype(std::log10((unsigned long long)0)), double>::value), "");
435     static_assert((std::is_same<decltype(std::log10((double)0)), double>::value), "");
436     static_assert((std::is_same<decltype(std::log10((long double)0)), long double>::value), "");
437     static_assert((std::is_same<decltype(std::log10f(0)), float>::value), "");
438     static_assert((std::is_same<decltype(std::log10l(0)), long double>::value), "");
439     static_assert((std::is_same<decltype(log10(Ambiguous())), Ambiguous>::value), "");
440     assert(std::log10(1) == 0);
441 }
442 
443 void test_modf()
444 {
445     static_assert((std::is_same<decltype(std::modf((float)0, (float*)0)), float>::value), "");
446     static_assert((std::is_same<decltype(std::modf((double)0, (double*)0)), double>::value), "");
447     static_assert((std::is_same<decltype(std::modf((long double)0, (long double*)0)), long double>::value), "");
448     static_assert((std::is_same<decltype(std::modff(0, (float*)0)), float>::value), "");
449     static_assert((std::is_same<decltype(std::modfl(0, (long double*)0)), long double>::value), "");
450     static_assert((std::is_same<decltype(modf(Ambiguous(), (Ambiguous*)0)), Ambiguous>::value), "");
451     double i;
452     assert(std::modf(1., &i) == 0);
453 }
454 
455 void test_pow()
456 {
457     static_assert((std::is_same<decltype(std::pow((float)0, (float)0)), float>::value), "");
458     static_assert((std::is_same<decltype(std::pow((bool)0, (float)0)), double>::value), "");
459     static_assert((std::is_same<decltype(std::pow((unsigned short)0, (double)0)), double>::value), "");
460     static_assert((std::is_same<decltype(std::pow((int)0, (long double)0)), long double>::value), "");
461     static_assert((std::is_same<decltype(std::pow((float)0, (unsigned int)0)), double>::value), "");
462     static_assert((std::is_same<decltype(std::pow((double)0, (long)0)), double>::value), "");
463     static_assert((std::is_same<decltype(std::pow((long double)0, (unsigned long)0)), long double>::value), "");
464     static_assert((std::is_same<decltype(std::pow((int)0, (long long)0)), double>::value), "");
465     static_assert((std::is_same<decltype(std::pow((int)0, (unsigned long long)0)), double>::value), "");
466     static_assert((std::is_same<decltype(std::pow((double)0, (double)0)), double>::value), "");
467     static_assert((std::is_same<decltype(std::pow((long double)0, (long double)0)), long double>::value), "");
468     static_assert((std::is_same<decltype(std::pow((float)0, (double)0)), double>::value), "");
469     static_assert((std::is_same<decltype(std::pow((float)0, (long double)0)), long double>::value), "");
470     static_assert((std::is_same<decltype(std::pow((double)0, (long double)0)), long double>::value), "");
471     static_assert((std::is_same<decltype(std::powf(0,0)), float>::value), "");
472     static_assert((std::is_same<decltype(std::powl(0,0)), long double>::value), "");
473     static_assert((std::is_same<decltype(std::pow((int)0, (int)0)), double>::value), "");
474 //     static_assert((std::is_same<decltype(std::pow(Value<int>(), (int)0)), double>::value), "");
475 //     static_assert((std::is_same<decltype(std::pow(Value<long double>(), (float)0)), long double>::value), "");
476 //     static_assert((std::is_same<decltype(std::pow((float) 0, Value<float>())), float>::value), "");
477     static_assert((std::is_same<decltype(pow(Ambiguous(), Ambiguous())), Ambiguous>::value), "");
478     assert(std::pow(1,1) == 1);
479 //     assert(std::pow(Value<int,1>(), Value<float,1>())  == 1);
480 //     assert(std::pow(1.0f, Value<double,1>()) == 1);
481 //     assert(std::pow(1.0, Value<int,1>()) == 1);
482 //     assert(std::pow(Value<long double,1>(), 1LL) == 1);
483 }
484 
485 void test_sin()
486 {
487     static_assert((std::is_same<decltype(std::sin((float)0)), float>::value), "");
488     static_assert((std::is_same<decltype(std::sin((bool)0)), double>::value), "");
489     static_assert((std::is_same<decltype(std::sin((unsigned short)0)), double>::value), "");
490     static_assert((std::is_same<decltype(std::sin((int)0)), double>::value), "");
491     static_assert((std::is_same<decltype(std::sin((unsigned int)0)), double>::value), "");
492     static_assert((std::is_same<decltype(std::sin((long)0)), double>::value), "");
493     static_assert((std::is_same<decltype(std::sin((unsigned long)0)), double>::value), "");
494     static_assert((std::is_same<decltype(std::sin((long long)0)), double>::value), "");
495     static_assert((std::is_same<decltype(std::sin((unsigned long long)0)), double>::value), "");
496     static_assert((std::is_same<decltype(std::sin((double)0)), double>::value), "");
497     static_assert((std::is_same<decltype(std::sin((long double)0)), long double>::value), "");
498     static_assert((std::is_same<decltype(std::sinf(0)), float>::value), "");
499     static_assert((std::is_same<decltype(std::sinl(0)), long double>::value), "");
500     static_assert((std::is_same<decltype(sin(Ambiguous())), Ambiguous>::value), "");
501     assert(std::sin(0) == 0);
502 }
503 
504 void test_sinh()
505 {
506     static_assert((std::is_same<decltype(std::sinh((float)0)), float>::value), "");
507     static_assert((std::is_same<decltype(std::sinh((bool)0)), double>::value), "");
508     static_assert((std::is_same<decltype(std::sinh((unsigned short)0)), double>::value), "");
509     static_assert((std::is_same<decltype(std::sinh((int)0)), double>::value), "");
510     static_assert((std::is_same<decltype(std::sinh((unsigned int)0)), double>::value), "");
511     static_assert((std::is_same<decltype(std::sinh((long)0)), double>::value), "");
512     static_assert((std::is_same<decltype(std::sinh((unsigned long)0)), double>::value), "");
513     static_assert((std::is_same<decltype(std::sinh((long long)0)), double>::value), "");
514     static_assert((std::is_same<decltype(std::sinh((unsigned long long)0)), double>::value), "");
515     static_assert((std::is_same<decltype(std::sinh((double)0)), double>::value), "");
516     static_assert((std::is_same<decltype(std::sinh((long double)0)), long double>::value), "");
517     static_assert((std::is_same<decltype(std::sinhf(0)), float>::value), "");
518     static_assert((std::is_same<decltype(std::sinhl(0)), long double>::value), "");
519     static_assert((std::is_same<decltype(sinh(Ambiguous())), Ambiguous>::value), "");
520     assert(std::sinh(0) == 0);
521 }
522 
523 void test_sqrt()
524 {
525     static_assert((std::is_same<decltype(std::sqrt((float)0)), float>::value), "");
526     static_assert((std::is_same<decltype(std::sqrt((bool)0)), double>::value), "");
527     static_assert((std::is_same<decltype(std::sqrt((unsigned short)0)), double>::value), "");
528     static_assert((std::is_same<decltype(std::sqrt((int)0)), double>::value), "");
529     static_assert((std::is_same<decltype(std::sqrt((unsigned int)0)), double>::value), "");
530     static_assert((std::is_same<decltype(std::sqrt((long)0)), double>::value), "");
531     static_assert((std::is_same<decltype(std::sqrt((unsigned long)0)), double>::value), "");
532     static_assert((std::is_same<decltype(std::sqrt((long long)0)), double>::value), "");
533     static_assert((std::is_same<decltype(std::sqrt((unsigned long long)0)), double>::value), "");
534     static_assert((std::is_same<decltype(std::sqrt((double)0)), double>::value), "");
535     static_assert((std::is_same<decltype(std::sqrt((long double)0)), long double>::value), "");
536     static_assert((std::is_same<decltype(std::sqrtf(0)), float>::value), "");
537     static_assert((std::is_same<decltype(std::sqrtl(0)), long double>::value), "");
538     static_assert((std::is_same<decltype(sqrt(Ambiguous())), Ambiguous>::value), "");
539     assert(std::sqrt(4) == 2);
540 }
541 
542 void test_tan()
543 {
544     static_assert((std::is_same<decltype(std::tan((float)0)), float>::value), "");
545     static_assert((std::is_same<decltype(std::tan((bool)0)), double>::value), "");
546     static_assert((std::is_same<decltype(std::tan((unsigned short)0)), double>::value), "");
547     static_assert((std::is_same<decltype(std::tan((int)0)), double>::value), "");
548     static_assert((std::is_same<decltype(std::tan((unsigned int)0)), double>::value), "");
549     static_assert((std::is_same<decltype(std::tan((long)0)), double>::value), "");
550     static_assert((std::is_same<decltype(std::tan((unsigned long)0)), double>::value), "");
551     static_assert((std::is_same<decltype(std::tan((long long)0)), double>::value), "");
552     static_assert((std::is_same<decltype(std::tan((unsigned long long)0)), double>::value), "");
553     static_assert((std::is_same<decltype(std::tan((double)0)), double>::value), "");
554     static_assert((std::is_same<decltype(std::tan((long double)0)), long double>::value), "");
555     static_assert((std::is_same<decltype(std::tanf(0)), float>::value), "");
556     static_assert((std::is_same<decltype(std::tanl(0)), long double>::value), "");
557     static_assert((std::is_same<decltype(tan(Ambiguous())), Ambiguous>::value), "");
558     assert(std::tan(0) == 0);
559 }
560 
561 void test_tanh()
562 {
563     static_assert((std::is_same<decltype(std::tanh((float)0)), float>::value), "");
564     static_assert((std::is_same<decltype(std::tanh((bool)0)), double>::value), "");
565     static_assert((std::is_same<decltype(std::tanh((unsigned short)0)), double>::value), "");
566     static_assert((std::is_same<decltype(std::tanh((int)0)), double>::value), "");
567     static_assert((std::is_same<decltype(std::tanh((unsigned int)0)), double>::value), "");
568     static_assert((std::is_same<decltype(std::tanh((long)0)), double>::value), "");
569     static_assert((std::is_same<decltype(std::tanh((unsigned long)0)), double>::value), "");
570     static_assert((std::is_same<decltype(std::tanh((long long)0)), double>::value), "");
571     static_assert((std::is_same<decltype(std::tanh((unsigned long long)0)), double>::value), "");
572     static_assert((std::is_same<decltype(std::tanh((double)0)), double>::value), "");
573     static_assert((std::is_same<decltype(std::tanh((long double)0)), long double>::value), "");
574     static_assert((std::is_same<decltype(std::tanhf(0)), float>::value), "");
575     static_assert((std::is_same<decltype(std::tanhl(0)), long double>::value), "");
576     static_assert((std::is_same<decltype(tanh(Ambiguous())), Ambiguous>::value), "");
577     assert(std::tanh(0) == 0);
578 }
579 
580 void test_signbit()
581 {
582 #ifdef signbit
583 #error signbit defined
584 #endif
585     static_assert((std::is_same<decltype(std::signbit((float)0)), bool>::value), "");
586     static_assert((std::is_same<decltype(std::signbit((double)0)), bool>::value), "");
587     static_assert((std::is_same<decltype(std::signbit(0)), bool>::value), "");
588     static_assert((std::is_same<decltype(std::signbit((long double)0)), bool>::value), "");
589     static_assert((std::is_same<decltype(signbit(Ambiguous())), Ambiguous>::value), "");
590     assert(std::signbit(-1.0) == true);
591     assert(std::signbit(0u) == false);
592     assert(std::signbit(std::numeric_limits<unsigned>::max()) == false);
593     assert(std::signbit(0) == false);
594     assert(std::signbit(1) == false);
595     assert(std::signbit(-1) == true);
596     assert(std::signbit(std::numeric_limits<int>::max()) == false);
597     assert(std::signbit(std::numeric_limits<int>::min()) == true);
598 }
599 
600 void test_fpclassify()
601 {
602 #ifdef fpclassify
603 #error fpclassify defined
604 #endif
605     static_assert((std::is_same<decltype(std::fpclassify((float)0)), int>::value), "");
606     static_assert((std::is_same<decltype(std::fpclassify((double)0)), int>::value), "");
607     static_assert((std::is_same<decltype(std::fpclassify(0)), int>::value), "");
608     static_assert((std::is_same<decltype(std::fpclassify((long double)0)), int>::value), "");
609     static_assert((std::is_same<decltype(fpclassify(Ambiguous())), Ambiguous>::value), "");
610     static_assert((std::is_same<decltype(fpclassify(Value<float>())), int>::value), "");
611     static_assert((std::is_same<decltype(fpclassify(Value<double>())), int>::value), "");
612     static_assert((std::is_same<decltype(fpclassify(Value<long double>())), int>::value), "");
613     ASSERT_NOEXCEPT(std::fpclassify((float)0));
614     ASSERT_NOEXCEPT(std::fpclassify((double)0));
615     ASSERT_NOEXCEPT(std::fpclassify((long double)0));
616     ASSERT_NOEXCEPT(std::fpclassify(0));
617     assert(std::fpclassify(-1.0) == FP_NORMAL);
618     assert(std::fpclassify(0) == FP_ZERO);
619     assert(std::fpclassify(1) == FP_NORMAL);
620     assert(std::fpclassify(-1) == FP_NORMAL);
621     assert(std::fpclassify(std::numeric_limits<int>::max()) == FP_NORMAL);
622     assert(std::fpclassify(std::numeric_limits<int>::min()) == FP_NORMAL);
623     assert(std::fpclassify(Value<double, 1>()) == FP_NORMAL);
624 }
625 
626 void test_isfinite()
627 {
628 #ifdef isfinite
629 #error isfinite defined
630 #endif
631     static_assert((std::is_same<decltype(std::isfinite((float)0)), bool>::value), "");
632     static_assert((std::is_same<decltype(std::isfinite((double)0)), bool>::value), "");
633     static_assert((std::is_same<decltype(std::isfinite(0)), bool>::value), "");
634     static_assert((std::is_same<decltype(std::isfinite((long double)0)), bool>::value), "");
635     static_assert((std::is_same<decltype(isfinite(Ambiguous())), Ambiguous>::value), "");
636     assert(std::isfinite(-1.0) == true);
637     assert(std::isfinite(0) == true);
638     assert(std::isfinite(1) == true);
639     assert(std::isfinite(-1) == true);
640     assert(std::isfinite(std::numeric_limits<int>::max()) == true);
641     assert(std::isfinite(std::numeric_limits<int>::min()) == true);
642 }
643 
644 void test_isnormal()
645 {
646 #ifdef isnormal
647 #error isnormal defined
648 #endif
649     static_assert((std::is_same<decltype(std::isnormal((float)0)), bool>::value), "");
650     static_assert((std::is_same<decltype(std::isnormal((double)0)), bool>::value), "");
651     static_assert((std::is_same<decltype(std::isnormal(0)), bool>::value), "");
652     static_assert((std::is_same<decltype(std::isnormal((long double)0)), bool>::value), "");
653     static_assert((std::is_same<decltype(isnormal(Ambiguous())), Ambiguous>::value), "");
654     assert(std::isnormal(-1.0) == true);
655     assert(std::isnormal(0) == false);
656     assert(std::isnormal(1) == true);
657     assert(std::isnormal(-1) == true);
658     assert(std::isnormal(std::numeric_limits<int>::max()) == true);
659     assert(std::isnormal(std::numeric_limits<int>::min()) == true);
660 }
661 
662 void test_isgreater()
663 {
664 #ifdef isgreater
665 #error isgreater defined
666 #endif
667     static_assert((std::is_same<decltype(std::isgreater((float)0, (float)0)), bool>::value), "");
668     static_assert((std::is_same<decltype(std::isgreater((float)0, (double)0)), bool>::value), "");
669     static_assert((std::is_same<decltype(std::isgreater((float)0, (long double)0)), bool>::value), "");
670     static_assert((std::is_same<decltype(std::isgreater((double)0, (float)0)), bool>::value), "");
671     static_assert((std::is_same<decltype(std::isgreater((double)0, (double)0)), bool>::value), "");
672     static_assert((std::is_same<decltype(std::isgreater(0, (double)0)), bool>::value), "");
673     static_assert((std::is_same<decltype(std::isgreater((double)0, (long double)0)), bool>::value), "");
674     static_assert((std::is_same<decltype(std::isgreater((long double)0, (float)0)), bool>::value), "");
675     static_assert((std::is_same<decltype(std::isgreater((long double)0, (double)0)), bool>::value), "");
676     static_assert((std::is_same<decltype(std::isgreater((long double)0, (long double)0)), bool>::value), "");
677     static_assert((std::is_same<decltype(isgreater(Ambiguous(), Ambiguous())), Ambiguous>::value), "");
678     assert(std::isgreater(-1.0, 0.F) == false);
679 }
680 
681 void test_isgreaterequal()
682 {
683 #ifdef isgreaterequal
684 #error isgreaterequal defined
685 #endif
686     static_assert((std::is_same<decltype(std::isgreaterequal((float)0, (float)0)), bool>::value), "");
687     static_assert((std::is_same<decltype(std::isgreaterequal((float)0, (double)0)), bool>::value), "");
688     static_assert((std::is_same<decltype(std::isgreaterequal((float)0, (long double)0)), bool>::value), "");
689     static_assert((std::is_same<decltype(std::isgreaterequal((double)0, (float)0)), bool>::value), "");
690     static_assert((std::is_same<decltype(std::isgreaterequal((double)0, (double)0)), bool>::value), "");
691     static_assert((std::is_same<decltype(std::isgreaterequal(0, (double)0)), bool>::value), "");
692     static_assert((std::is_same<decltype(std::isgreaterequal((double)0, (long double)0)), bool>::value), "");
693     static_assert((std::is_same<decltype(std::isgreaterequal((long double)0, (float)0)), bool>::value), "");
694     static_assert((std::is_same<decltype(std::isgreaterequal((long double)0, (double)0)), bool>::value), "");
695     static_assert((std::is_same<decltype(std::isgreaterequal((long double)0, (long double)0)), bool>::value), "");
696     static_assert((std::is_same<decltype(isgreaterequal(Ambiguous(), Ambiguous())), Ambiguous>::value), "");
697     assert(std::isgreaterequal(-1.0, 0.F) == false);
698 }
699 
700 void test_isinf()
701 {
702 #ifdef isinf
703 #error isinf defined
704 #endif
705     static_assert((std::is_same<decltype(std::isinf((float)0)), bool>::value), "");
706 
707     typedef decltype(std::isinf((double)0)) DoubleRetType;
708 #if !defined(__linux__) || defined(__clang__)
709     static_assert((std::is_same<DoubleRetType, bool>::value), "");
710 #else
711     // GLIBC < 2.23 defines 'isinf(double)' with a return type of 'int' in
712     // all C++ dialects. The test should tolerate this when libc++ can't work
713     // around it.
714     // See: https://sourceware.org/bugzilla/show_bug.cgi?id=19439
715     static_assert((std::is_same<DoubleRetType, bool>::value
716                 || std::is_same<DoubleRetType, int>::value), "");
717 #endif
718 
719     static_assert((std::is_same<decltype(std::isinf(0)), bool>::value), "");
720     static_assert((std::is_same<decltype(std::isinf((long double)0)), bool>::value), "");
721     assert(std::isinf(-1.0) == false);
722     assert(std::isinf(0) == false);
723     assert(std::isinf(1) == false);
724     assert(std::isinf(-1) == false);
725     assert(std::isinf(std::numeric_limits<int>::max()) == false);
726     assert(std::isinf(std::numeric_limits<int>::min()) == false);
727 }
728 
729 void test_isless()
730 {
731 #ifdef isless
732 #error isless defined
733 #endif
734     static_assert((std::is_same<decltype(std::isless((float)0, (float)0)), bool>::value), "");
735     static_assert((std::is_same<decltype(std::isless((float)0, (double)0)), bool>::value), "");
736     static_assert((std::is_same<decltype(std::isless((float)0, (long double)0)), bool>::value), "");
737     static_assert((std::is_same<decltype(std::isless((double)0, (float)0)), bool>::value), "");
738     static_assert((std::is_same<decltype(std::isless((double)0, (double)0)), bool>::value), "");
739     static_assert((std::is_same<decltype(std::isless(0, (double)0)), bool>::value), "");
740     static_assert((std::is_same<decltype(std::isless((double)0, (long double)0)), bool>::value), "");
741     static_assert((std::is_same<decltype(std::isless((long double)0, (float)0)), bool>::value), "");
742     static_assert((std::is_same<decltype(std::isless((long double)0, (double)0)), bool>::value), "");
743     static_assert((std::is_same<decltype(std::isless((long double)0, (long double)0)), bool>::value), "");
744     static_assert((std::is_same<decltype(isless(Ambiguous(), Ambiguous())), Ambiguous>::value), "");
745     assert(std::isless(-1.0, 0.F) == true);
746 }
747 
748 void test_islessequal()
749 {
750 #ifdef islessequal
751 #error islessequal defined
752 #endif
753     static_assert((std::is_same<decltype(std::islessequal((float)0, (float)0)), bool>::value), "");
754     static_assert((std::is_same<decltype(std::islessequal((float)0, (double)0)), bool>::value), "");
755     static_assert((std::is_same<decltype(std::islessequal((float)0, (long double)0)), bool>::value), "");
756     static_assert((std::is_same<decltype(std::islessequal((double)0, (float)0)), bool>::value), "");
757     static_assert((std::is_same<decltype(std::islessequal((double)0, (double)0)), bool>::value), "");
758     static_assert((std::is_same<decltype(std::islessequal(0, (double)0)), bool>::value), "");
759     static_assert((std::is_same<decltype(std::islessequal((double)0, (long double)0)), bool>::value), "");
760     static_assert((std::is_same<decltype(std::islessequal((long double)0, (float)0)), bool>::value), "");
761     static_assert((std::is_same<decltype(std::islessequal((long double)0, (double)0)), bool>::value), "");
762     static_assert((std::is_same<decltype(std::islessequal((long double)0, (long double)0)), bool>::value), "");
763     static_assert((std::is_same<decltype(islessequal(Ambiguous(), Ambiguous())), Ambiguous>::value), "");
764     assert(std::islessequal(-1.0, 0.F) == true);
765 }
766 
767 void test_islessgreater()
768 {
769 #ifdef islessgreater
770 #error islessgreater defined
771 #endif
772     static_assert((std::is_same<decltype(std::islessgreater((float)0, (float)0)), bool>::value), "");
773     static_assert((std::is_same<decltype(std::islessgreater((float)0, (double)0)), bool>::value), "");
774     static_assert((std::is_same<decltype(std::islessgreater((float)0, (long double)0)), bool>::value), "");
775     static_assert((std::is_same<decltype(std::islessgreater((double)0, (float)0)), bool>::value), "");
776     static_assert((std::is_same<decltype(std::islessgreater((double)0, (double)0)), bool>::value), "");
777     static_assert((std::is_same<decltype(std::islessgreater(0, (double)0)), bool>::value), "");
778     static_assert((std::is_same<decltype(std::islessgreater((double)0, (long double)0)), bool>::value), "");
779     static_assert((std::is_same<decltype(std::islessgreater((long double)0, (float)0)), bool>::value), "");
780     static_assert((std::is_same<decltype(std::islessgreater((long double)0, (double)0)), bool>::value), "");
781     static_assert((std::is_same<decltype(std::islessgreater((long double)0, (long double)0)), bool>::value), "");
782     static_assert((std::is_same<decltype(islessgreater(Ambiguous(), Ambiguous())), Ambiguous>::value), "");
783     assert(std::islessgreater(-1.0, 0.F) == true);
784 }
785 
786 void test_isnan()
787 {
788 #ifdef isnan
789 #error isnan defined
790 #endif
791     static_assert((std::is_same<decltype(std::isnan((float)0)), bool>::value), "");
792 
793     typedef decltype(std::isnan((double)0)) DoubleRetType;
794 #if !defined(__linux__) || defined(__clang__)
795     static_assert((std::is_same<DoubleRetType, bool>::value), "");
796 #else
797     // GLIBC < 2.23 defines 'isinf(double)' with a return type of 'int' in
798     // all C++ dialects. The test should tolerate this when libc++ can't work
799     // around it.
800     // See: https://sourceware.org/bugzilla/show_bug.cgi?id=19439
801     static_assert((std::is_same<DoubleRetType, bool>::value
802                 || std::is_same<DoubleRetType, int>::value), "");
803 #endif
804 
805     static_assert((std::is_same<decltype(std::isnan(0)), bool>::value), "");
806     static_assert((std::is_same<decltype(std::isnan((long double)0)), bool>::value), "");
807     assert(std::isnan(-1.0) == false);
808     assert(std::isnan(0) == false);
809     assert(std::isnan(1) == false);
810     assert(std::isnan(-1) == false);
811     assert(std::isnan(std::numeric_limits<int>::max()) == false);
812     assert(std::isnan(std::numeric_limits<int>::min()) == false);
813 }
814 
815 void test_isunordered()
816 {
817 #ifdef isunordered
818 #error isunordered defined
819 #endif
820     static_assert((std::is_same<decltype(std::isunordered((float)0, (float)0)), bool>::value), "");
821     static_assert((std::is_same<decltype(std::isunordered((float)0, (double)0)), bool>::value), "");
822     static_assert((std::is_same<decltype(std::isunordered((float)0, (long double)0)), bool>::value), "");
823     static_assert((std::is_same<decltype(std::isunordered((double)0, (float)0)), bool>::value), "");
824     static_assert((std::is_same<decltype(std::isunordered((double)0, (double)0)), bool>::value), "");
825     static_assert((std::is_same<decltype(std::isunordered(0, (double)0)), bool>::value), "");
826     static_assert((std::is_same<decltype(std::isunordered((double)0, (long double)0)), bool>::value), "");
827     static_assert((std::is_same<decltype(std::isunordered((long double)0, (float)0)), bool>::value), "");
828     static_assert((std::is_same<decltype(std::isunordered((long double)0, (double)0)), bool>::value), "");
829     static_assert((std::is_same<decltype(std::isunordered((long double)0, (long double)0)), bool>::value), "");
830     static_assert((std::is_same<decltype(isunordered(Ambiguous(), Ambiguous())), Ambiguous>::value), "");
831     assert(std::isunordered(-1.0, 0.F) == false);
832 }
833 
834 void test_acosh()
835 {
836     static_assert((std::is_same<decltype(std::acosh((float)0)), float>::value), "");
837     static_assert((std::is_same<decltype(std::acosh((bool)0)), double>::value), "");
838     static_assert((std::is_same<decltype(std::acosh((unsigned short)0)), double>::value), "");
839     static_assert((std::is_same<decltype(std::acosh((int)0)), double>::value), "");
840     static_assert((std::is_same<decltype(std::acosh((unsigned int)0)), double>::value), "");
841     static_assert((std::is_same<decltype(std::acosh((long)0)), double>::value), "");
842     static_assert((std::is_same<decltype(std::acosh((unsigned long)0)), double>::value), "");
843     static_assert((std::is_same<decltype(std::acosh((long long)0)), double>::value), "");
844     static_assert((std::is_same<decltype(std::acosh((unsigned long long)0)), double>::value), "");
845     static_assert((std::is_same<decltype(std::acosh((double)0)), double>::value), "");
846     static_assert((std::is_same<decltype(std::acosh((long double)0)), long double>::value), "");
847     static_assert((std::is_same<decltype(std::acoshf(0)), float>::value), "");
848     static_assert((std::is_same<decltype(std::acoshl(0)), long double>::value), "");
849     static_assert((std::is_same<decltype(acosh(Ambiguous())), Ambiguous>::value), "");
850     assert(std::acosh(1) == 0);
851 }
852 
853 void test_asinh()
854 {
855     static_assert((std::is_same<decltype(std::asinh((float)0)), float>::value), "");
856     static_assert((std::is_same<decltype(std::asinh((bool)0)), double>::value), "");
857     static_assert((std::is_same<decltype(std::asinh((unsigned short)0)), double>::value), "");
858     static_assert((std::is_same<decltype(std::asinh((int)0)), double>::value), "");
859     static_assert((std::is_same<decltype(std::asinh((unsigned int)0)), double>::value), "");
860     static_assert((std::is_same<decltype(std::asinh((long)0)), double>::value), "");
861     static_assert((std::is_same<decltype(std::asinh((unsigned long)0)), double>::value), "");
862     static_assert((std::is_same<decltype(std::asinh((long long)0)), double>::value), "");
863     static_assert((std::is_same<decltype(std::asinh((unsigned long long)0)), double>::value), "");
864     static_assert((std::is_same<decltype(std::asinh((double)0)), double>::value), "");
865     static_assert((std::is_same<decltype(std::asinh((long double)0)), long double>::value), "");
866     static_assert((std::is_same<decltype(std::asinhf(0)), float>::value), "");
867     static_assert((std::is_same<decltype(std::asinhl(0)), long double>::value), "");
868     static_assert((std::is_same<decltype(asinh(Ambiguous())), Ambiguous>::value), "");
869     assert(std::asinh(0) == 0);
870 }
871 
872 void test_atanh()
873 {
874     static_assert((std::is_same<decltype(std::atanh((float)0)), float>::value), "");
875     static_assert((std::is_same<decltype(std::atanh((bool)0)), double>::value), "");
876     static_assert((std::is_same<decltype(std::atanh((unsigned short)0)), double>::value), "");
877     static_assert((std::is_same<decltype(std::atanh((int)0)), double>::value), "");
878     static_assert((std::is_same<decltype(std::atanh((unsigned int)0)), double>::value), "");
879     static_assert((std::is_same<decltype(std::atanh((long)0)), double>::value), "");
880     static_assert((std::is_same<decltype(std::atanh((unsigned long)0)), double>::value), "");
881     static_assert((std::is_same<decltype(std::atanh((long long)0)), double>::value), "");
882     static_assert((std::is_same<decltype(std::atanh((unsigned long long)0)), double>::value), "");
883     static_assert((std::is_same<decltype(std::atanh((double)0)), double>::value), "");
884     static_assert((std::is_same<decltype(std::atanh((long double)0)), long double>::value), "");
885     static_assert((std::is_same<decltype(std::atanhf(0)), float>::value), "");
886     static_assert((std::is_same<decltype(std::atanhl(0)), long double>::value), "");
887     static_assert((std::is_same<decltype(atanh(Ambiguous())), Ambiguous>::value), "");
888     assert(std::atanh(0) == 0);
889 }
890 
891 void test_cbrt()
892 {
893     static_assert((std::is_same<decltype(std::cbrt((float)0)), float>::value), "");
894     static_assert((std::is_same<decltype(std::cbrt((bool)0)), double>::value), "");
895     static_assert((std::is_same<decltype(std::cbrt((unsigned short)0)), double>::value), "");
896     static_assert((std::is_same<decltype(std::cbrt((int)0)), double>::value), "");
897     static_assert((std::is_same<decltype(std::cbrt((unsigned int)0)), double>::value), "");
898     static_assert((std::is_same<decltype(std::cbrt((long)0)), double>::value), "");
899     static_assert((std::is_same<decltype(std::cbrt((unsigned long)0)), double>::value), "");
900     static_assert((std::is_same<decltype(std::cbrt((long long)0)), double>::value), "");
901     static_assert((std::is_same<decltype(std::cbrt((unsigned long long)0)), double>::value), "");
902     static_assert((std::is_same<decltype(std::cbrt((double)0)), double>::value), "");
903     static_assert((std::is_same<decltype(std::cbrt((long double)0)), long double>::value), "");
904     static_assert((std::is_same<decltype(std::cbrtf(0)), float>::value), "");
905     static_assert((std::is_same<decltype(std::cbrtl(0)), long double>::value), "");
906     static_assert((std::is_same<decltype(cbrt(Ambiguous())), Ambiguous>::value), "");
907     assert(truncate_fp(std::cbrt(1)) == 1);
908 }
909 
910 void test_copysign()
911 {
912     static_assert((std::is_same<decltype(std::copysign((float)0, (float)0)), float>::value), "");
913     static_assert((std::is_same<decltype(std::copysign((bool)0, (float)0)), double>::value), "");
914     static_assert((std::is_same<decltype(std::copysign((unsigned short)0, (double)0)), double>::value), "");
915     static_assert((std::is_same<decltype(std::copysign((int)0, (long double)0)), long double>::value), "");
916     static_assert((std::is_same<decltype(std::copysign((float)0, (unsigned int)0)), double>::value), "");
917     static_assert((std::is_same<decltype(std::copysign((double)0, (long)0)), double>::value), "");
918     static_assert((std::is_same<decltype(std::copysign((long double)0, (unsigned long)0)), long double>::value), "");
919     static_assert((std::is_same<decltype(std::copysign((int)0, (long long)0)), double>::value), "");
920     static_assert((std::is_same<decltype(std::copysign((int)0, (unsigned long long)0)), double>::value), "");
921     static_assert((std::is_same<decltype(std::copysign((double)0, (double)0)), double>::value), "");
922     static_assert((std::is_same<decltype(std::copysign((long double)0, (long double)0)), long double>::value), "");
923     static_assert((std::is_same<decltype(std::copysign((float)0, (double)0)), double>::value), "");
924     static_assert((std::is_same<decltype(std::copysign((float)0, (long double)0)), long double>::value), "");
925     static_assert((std::is_same<decltype(std::copysign((double)0, (long double)0)), long double>::value), "");
926     static_assert((std::is_same<decltype(std::copysignf(0,0)), float>::value), "");
927     static_assert((std::is_same<decltype(std::copysignl(0,0)), long double>::value), "");
928     static_assert((std::is_same<decltype(std::copysign((int)0, (int)0)), double>::value), "");
929     static_assert((std::is_same<decltype(copysign(Ambiguous(), Ambiguous())), Ambiguous>::value), "");
930     assert(std::copysign(1,1) == 1);
931 }
932 
933 void test_erf()
934 {
935     static_assert((std::is_same<decltype(std::erf((float)0)), float>::value), "");
936     static_assert((std::is_same<decltype(std::erf((bool)0)), double>::value), "");
937     static_assert((std::is_same<decltype(std::erf((unsigned short)0)), double>::value), "");
938     static_assert((std::is_same<decltype(std::erf((int)0)), double>::value), "");
939     static_assert((std::is_same<decltype(std::erf((unsigned int)0)), double>::value), "");
940     static_assert((std::is_same<decltype(std::erf((long)0)), double>::value), "");
941     static_assert((std::is_same<decltype(std::erf((unsigned long)0)), double>::value), "");
942     static_assert((std::is_same<decltype(std::erf((long long)0)), double>::value), "");
943     static_assert((std::is_same<decltype(std::erf((unsigned long long)0)), double>::value), "");
944     static_assert((std::is_same<decltype(std::erf((double)0)), double>::value), "");
945     static_assert((std::is_same<decltype(std::erf((long double)0)), long double>::value), "");
946     static_assert((std::is_same<decltype(std::erff(0)), float>::value), "");
947     static_assert((std::is_same<decltype(std::erfl(0)), long double>::value), "");
948     static_assert((std::is_same<decltype(erf(Ambiguous())), Ambiguous>::value), "");
949     assert(std::erf(0) == 0);
950 }
951 
952 void test_erfc()
953 {
954     static_assert((std::is_same<decltype(std::erfc((float)0)), float>::value), "");
955     static_assert((std::is_same<decltype(std::erfc((bool)0)), double>::value), "");
956     static_assert((std::is_same<decltype(std::erfc((unsigned short)0)), double>::value), "");
957     static_assert((std::is_same<decltype(std::erfc((int)0)), double>::value), "");
958     static_assert((std::is_same<decltype(std::erfc((unsigned int)0)), double>::value), "");
959     static_assert((std::is_same<decltype(std::erfc((long)0)), double>::value), "");
960     static_assert((std::is_same<decltype(std::erfc((unsigned long)0)), double>::value), "");
961     static_assert((std::is_same<decltype(std::erfc((long long)0)), double>::value), "");
962     static_assert((std::is_same<decltype(std::erfc((unsigned long long)0)), double>::value), "");
963     static_assert((std::is_same<decltype(std::erfc((double)0)), double>::value), "");
964     static_assert((std::is_same<decltype(std::erfc((long double)0)), long double>::value), "");
965     static_assert((std::is_same<decltype(std::erfcf(0)), float>::value), "");
966     static_assert((std::is_same<decltype(std::erfcl(0)), long double>::value), "");
967     static_assert((std::is_same<decltype(erfc(Ambiguous())), Ambiguous>::value), "");
968     assert(std::erfc(0) == 1);
969 }
970 
971 void test_exp2()
972 {
973     static_assert((std::is_same<decltype(std::exp2((float)0)), float>::value), "");
974     static_assert((std::is_same<decltype(std::exp2((bool)0)), double>::value), "");
975     static_assert((std::is_same<decltype(std::exp2((unsigned short)0)), double>::value), "");
976     static_assert((std::is_same<decltype(std::exp2((int)0)), double>::value), "");
977     static_assert((std::is_same<decltype(std::exp2((unsigned int)0)), double>::value), "");
978     static_assert((std::is_same<decltype(std::exp2((long)0)), double>::value), "");
979     static_assert((std::is_same<decltype(std::exp2((unsigned long)0)), double>::value), "");
980     static_assert((std::is_same<decltype(std::exp2((long long)0)), double>::value), "");
981     static_assert((std::is_same<decltype(std::exp2((unsigned long long)0)), double>::value), "");
982     static_assert((std::is_same<decltype(std::exp2((double)0)), double>::value), "");
983     static_assert((std::is_same<decltype(std::exp2((long double)0)), long double>::value), "");
984     static_assert((std::is_same<decltype(std::exp2f(0)), float>::value), "");
985     static_assert((std::is_same<decltype(std::exp2l(0)), long double>::value), "");
986     static_assert((std::is_same<decltype(exp2(Ambiguous())), Ambiguous>::value), "");
987     assert(std::exp2(1) == 2);
988 }
989 
990 void test_expm1()
991 {
992     static_assert((std::is_same<decltype(std::expm1((float)0)), float>::value), "");
993     static_assert((std::is_same<decltype(std::expm1((bool)0)), double>::value), "");
994     static_assert((std::is_same<decltype(std::expm1((unsigned short)0)), double>::value), "");
995     static_assert((std::is_same<decltype(std::expm1((int)0)), double>::value), "");
996     static_assert((std::is_same<decltype(std::expm1((unsigned int)0)), double>::value), "");
997     static_assert((std::is_same<decltype(std::expm1((long)0)), double>::value), "");
998     static_assert((std::is_same<decltype(std::expm1((unsigned long)0)), double>::value), "");
999     static_assert((std::is_same<decltype(std::expm1((long long)0)), double>::value), "");
1000     static_assert((std::is_same<decltype(std::expm1((unsigned long long)0)), double>::value), "");
1001     static_assert((std::is_same<decltype(std::expm1((double)0)), double>::value), "");
1002     static_assert((std::is_same<decltype(std::expm1((long double)0)), long double>::value), "");
1003     static_assert((std::is_same<decltype(std::expm1f(0)), float>::value), "");
1004     static_assert((std::is_same<decltype(std::expm1l(0)), long double>::value), "");
1005     static_assert((std::is_same<decltype(expm1(Ambiguous())), Ambiguous>::value), "");
1006     assert(std::expm1(0) == 0);
1007 }
1008 
1009 void test_fdim()
1010 {
1011     static_assert((std::is_same<decltype(std::fdim((float)0, (float)0)), float>::value), "");
1012     static_assert((std::is_same<decltype(std::fdim((bool)0, (float)0)), double>::value), "");
1013     static_assert((std::is_same<decltype(std::fdim((unsigned short)0, (double)0)), double>::value), "");
1014     static_assert((std::is_same<decltype(std::fdim((int)0, (long double)0)), long double>::value), "");
1015     static_assert((std::is_same<decltype(std::fdim((float)0, (unsigned int)0)), double>::value), "");
1016     static_assert((std::is_same<decltype(std::fdim((double)0, (long)0)), double>::value), "");
1017     static_assert((std::is_same<decltype(std::fdim((long double)0, (unsigned long)0)), long double>::value), "");
1018     static_assert((std::is_same<decltype(std::fdim((int)0, (long long)0)), double>::value), "");
1019     static_assert((std::is_same<decltype(std::fdim((int)0, (unsigned long long)0)), double>::value), "");
1020     static_assert((std::is_same<decltype(std::fdim((double)0, (double)0)), double>::value), "");
1021     static_assert((std::is_same<decltype(std::fdim((long double)0, (long double)0)), long double>::value), "");
1022     static_assert((std::is_same<decltype(std::fdim((float)0, (double)0)), double>::value), "");
1023     static_assert((std::is_same<decltype(std::fdim((float)0, (long double)0)), long double>::value), "");
1024     static_assert((std::is_same<decltype(std::fdim((double)0, (long double)0)), long double>::value), "");
1025     static_assert((std::is_same<decltype(std::fdimf(0,0)), float>::value), "");
1026     static_assert((std::is_same<decltype(std::fdiml(0,0)), long double>::value), "");
1027     static_assert((std::is_same<decltype(std::fdim((int)0, (int)0)), double>::value), "");
1028     static_assert((std::is_same<decltype(fdim(Ambiguous(), Ambiguous())), Ambiguous>::value), "");
1029     assert(std::fdim(1,0) == 1);
1030 }
1031 
1032 void test_fma()
1033 {
1034     static_assert((std::is_same<decltype(std::fma((bool)0, (float)0, (float)0)), double>::value), "");
1035     static_assert((std::is_same<decltype(std::fma((char)0, (float)0, (float)0)), double>::value), "");
1036     static_assert((std::is_same<decltype(std::fma((unsigned)0, (float)0, (float)0)), double>::value), "");
1037     static_assert((std::is_same<decltype(std::fma((float)0, (int)0, (float)0)), double>::value), "");
1038     static_assert((std::is_same<decltype(std::fma((float)0, (long)0, (float)0)), double>::value), "");
1039     static_assert((std::is_same<decltype(std::fma((float)0, (float)0, (unsigned long long)0)), double>::value), "");
1040     static_assert((std::is_same<decltype(std::fma((float)0, (float)0, (double)0)), double>::value), "");
1041     static_assert((std::is_same<decltype(std::fma((float)0, (float)0, (long double)0)), long double>::value), "");
1042     static_assert((std::is_same<decltype(std::fma((float)0, (float)0, (float)0)), float>::value), "");
1043 
1044     static_assert((std::is_same<decltype(std::fma((bool)0, (double)0, (double)0)), double>::value), "");
1045     static_assert((std::is_same<decltype(std::fma((char)0, (double)0, (double)0)), double>::value), "");
1046     static_assert((std::is_same<decltype(std::fma((unsigned)0, (double)0, (double)0)), double>::value), "");
1047     static_assert((std::is_same<decltype(std::fma((double)0, (int)0, (double)0)), double>::value), "");
1048     static_assert((std::is_same<decltype(std::fma((double)0, (long)0, (double)0)), double>::value), "");
1049     static_assert((std::is_same<decltype(std::fma((double)0, (double)0, (unsigned long long)0)), double>::value), "");
1050     static_assert((std::is_same<decltype(std::fma((double)0, (double)0, (float)0)), double>::value), "");
1051     static_assert((std::is_same<decltype(std::fma((double)0, (double)0, (long double)0)), long double>::value), "");
1052     static_assert((std::is_same<decltype(std::fma((double)0, (double)0,  (double)0)), double>::value), "");
1053 
1054     static_assert((std::is_same<decltype(std::fma((bool)0, (long double)0, (long double)0)), long double>::value), "");
1055     static_assert((std::is_same<decltype(std::fma((char)0, (long double)0, (long double)0)), long double>::value), "");
1056     static_assert((std::is_same<decltype(std::fma((unsigned)0, (long double)0, (long double)0)), long double>::value), "");
1057     static_assert((std::is_same<decltype(std::fma((long double)0, (int)0, (long double)0)), long double>::value), "");
1058     static_assert((std::is_same<decltype(std::fma((long double)0, (long)0, (long double)0)), long double>::value), "");
1059     static_assert((std::is_same<decltype(std::fma((long double)0, (long double)0, (unsigned long long)0)), long double>::value), "");
1060     static_assert((std::is_same<decltype(std::fma((long double)0, (long double)0, (float)0)), long double>::value), "");
1061     static_assert((std::is_same<decltype(std::fma((double)0, (long double)0, (long double)0)), long double>::value), "");
1062     static_assert((std::is_same<decltype(std::fma((long double)0, (long double)0, (long double)0)), long double>::value), "");
1063 
1064     static_assert((std::is_same<decltype(std::fmaf(0,0,0)), float>::value), "");
1065     static_assert((std::is_same<decltype(std::fmal(0,0,0)), long double>::value), "");
1066     static_assert((std::is_same<decltype(fma(Ambiguous(), Ambiguous(), Ambiguous())), Ambiguous>::value), "");
1067     assert(std::fma(1,1,1) == 2);
1068 }
1069 
1070 void test_fmax()
1071 {
1072     static_assert((std::is_same<decltype(std::fmax((float)0, (float)0)), float>::value), "");
1073     static_assert((std::is_same<decltype(std::fmax((bool)0, (float)0)), double>::value), "");
1074     static_assert((std::is_same<decltype(std::fmax((unsigned short)0, (double)0)), double>::value), "");
1075     static_assert((std::is_same<decltype(std::fmax((int)0, (long double)0)), long double>::value), "");
1076     static_assert((std::is_same<decltype(std::fmax((float)0, (unsigned int)0)), double>::value), "");
1077     static_assert((std::is_same<decltype(std::fmax((double)0, (long)0)), double>::value), "");
1078     static_assert((std::is_same<decltype(std::fmax((long double)0, (unsigned long)0)), long double>::value), "");
1079     static_assert((std::is_same<decltype(std::fmax((int)0, (long long)0)), double>::value), "");
1080     static_assert((std::is_same<decltype(std::fmax((int)0, (unsigned long long)0)), double>::value), "");
1081     static_assert((std::is_same<decltype(std::fmax((double)0, (double)0)), double>::value), "");
1082     static_assert((std::is_same<decltype(std::fmax((long double)0, (long double)0)), long double>::value), "");
1083     static_assert((std::is_same<decltype(std::fmax((float)0, (double)0)), double>::value), "");
1084     static_assert((std::is_same<decltype(std::fmax((float)0, (long double)0)), long double>::value), "");
1085     static_assert((std::is_same<decltype(std::fmax((double)0, (long double)0)), long double>::value), "");
1086     static_assert((std::is_same<decltype(std::fmaxf(0,0)), float>::value), "");
1087     static_assert((std::is_same<decltype(std::fmaxl(0,0)), long double>::value), "");
1088     static_assert((std::is_same<decltype(std::fmax((int)0, (int)0)), double>::value), "");
1089     static_assert((std::is_same<decltype(fmax(Ambiguous(), Ambiguous())), Ambiguous>::value), "");
1090     assert(std::fmax(1,0) == 1);
1091 }
1092 
1093 void test_fmin()
1094 {
1095     static_assert((std::is_same<decltype(std::fmin((float)0, (float)0)), float>::value), "");
1096     static_assert((std::is_same<decltype(std::fmin((bool)0, (float)0)), double>::value), "");
1097     static_assert((std::is_same<decltype(std::fmin((unsigned short)0, (double)0)), double>::value), "");
1098     static_assert((std::is_same<decltype(std::fmin((int)0, (long double)0)), long double>::value), "");
1099     static_assert((std::is_same<decltype(std::fmin((float)0, (unsigned int)0)), double>::value), "");
1100     static_assert((std::is_same<decltype(std::fmin((double)0, (long)0)), double>::value), "");
1101     static_assert((std::is_same<decltype(std::fmin((long double)0, (unsigned long)0)), long double>::value), "");
1102     static_assert((std::is_same<decltype(std::fmin((int)0, (long long)0)), double>::value), "");
1103     static_assert((std::is_same<decltype(std::fmin((int)0, (unsigned long long)0)), double>::value), "");
1104     static_assert((std::is_same<decltype(std::fmin((double)0, (double)0)), double>::value), "");
1105     static_assert((std::is_same<decltype(std::fmin((long double)0, (long double)0)), long double>::value), "");
1106     static_assert((std::is_same<decltype(std::fmin((float)0, (double)0)), double>::value), "");
1107     static_assert((std::is_same<decltype(std::fmin((float)0, (long double)0)), long double>::value), "");
1108     static_assert((std::is_same<decltype(std::fmin((double)0, (long double)0)), long double>::value), "");
1109     static_assert((std::is_same<decltype(std::fminf(0,0)), float>::value), "");
1110     static_assert((std::is_same<decltype(std::fminl(0,0)), long double>::value), "");
1111     static_assert((std::is_same<decltype(std::fmin((int)0, (int)0)), double>::value), "");
1112     static_assert((std::is_same<decltype(fmin(Ambiguous(), Ambiguous())), Ambiguous>::value), "");
1113     assert(std::fmin(1,0) == 0);
1114 }
1115 
1116 void test_hypot()
1117 {
1118     static_assert((std::is_same<decltype(std::hypot((float)0, (float)0)), float>::value), "");
1119     static_assert((std::is_same<decltype(std::hypot((bool)0, (float)0)), double>::value), "");
1120     static_assert((std::is_same<decltype(std::hypot((unsigned short)0, (double)0)), double>::value), "");
1121     static_assert((std::is_same<decltype(std::hypot((int)0, (long double)0)), long double>::value), "");
1122     static_assert((std::is_same<decltype(std::hypot((float)0, (unsigned int)0)), double>::value), "");
1123     static_assert((std::is_same<decltype(std::hypot((double)0, (long)0)), double>::value), "");
1124     static_assert((std::is_same<decltype(std::hypot((long double)0, (unsigned long)0)), long double>::value), "");
1125     static_assert((std::is_same<decltype(std::hypot((int)0, (long long)0)), double>::value), "");
1126     static_assert((std::is_same<decltype(std::hypot((int)0, (unsigned long long)0)), double>::value), "");
1127     static_assert((std::is_same<decltype(std::hypot((double)0, (double)0)), double>::value), "");
1128     static_assert((std::is_same<decltype(std::hypot((long double)0, (long double)0)), long double>::value), "");
1129     static_assert((std::is_same<decltype(std::hypot((float)0, (double)0)), double>::value), "");
1130     static_assert((std::is_same<decltype(std::hypot((float)0, (long double)0)), long double>::value), "");
1131     static_assert((std::is_same<decltype(std::hypot((double)0, (long double)0)), long double>::value), "");
1132     static_assert((std::is_same<decltype(std::hypotf(0,0)), float>::value), "");
1133     static_assert((std::is_same<decltype(std::hypotl(0,0)), long double>::value), "");
1134     static_assert((std::is_same<decltype(std::hypot((int)0, (int)0)), double>::value), "");
1135     static_assert((std::is_same<decltype(hypot(Ambiguous(), Ambiguous())), Ambiguous>::value), "");
1136     assert(std::hypot(3,4) == 5);
1137 
1138 #if TEST_STD_VER > 14
1139     static_assert((std::is_same<decltype(std::hypot((float)0, (float)0, (float)0)), float>::value), "");
1140     static_assert((std::is_same<decltype(std::hypot((float)0, (bool)0, (float)0)), double>::value), "");
1141     static_assert((std::is_same<decltype(std::hypot((float)0, (unsigned short)0, (double)0)), double>::value), "");
1142     static_assert((std::is_same<decltype(std::hypot((float)0, (int)0, (long double)0)), long double>::value), "");
1143     static_assert((std::is_same<decltype(std::hypot((float)0, (double)0, (long)0)), double>::value), "");
1144     static_assert((std::is_same<decltype(std::hypot((float)0, (long double)0, (unsigned long)0)), long double>::value), "");
1145     static_assert((std::is_same<decltype(std::hypot((float)0, (int)0, (long long)0)), double>::value), "");
1146     static_assert((std::is_same<decltype(std::hypot((float)0, (int)0, (unsigned long long)0)), double>::value), "");
1147     static_assert((std::is_same<decltype(std::hypot((float)0, (double)0, (double)0)), double>::value), "");
1148     static_assert((std::is_same<decltype(std::hypot((float)0, (long double)0, (long double)0)), long double>::value), "");
1149     static_assert((std::is_same<decltype(std::hypot((float)0, (float)0, (double)0)), double>::value), "");
1150     static_assert((std::is_same<decltype(std::hypot((float)0, (float)0, (long double)0)), long double>::value), "");
1151     static_assert((std::is_same<decltype(std::hypot((float)0, (double)0, (long double)0)), long double>::value), "");
1152     static_assert((std::is_same<decltype(std::hypot((int)0, (int)0, (int)0)), double>::value), "");
1153     static_assert((std::is_same<decltype(hypot(Ambiguous(), Ambiguous(), Ambiguous())), Ambiguous>::value), "");
1154 
1155     assert(std::hypot(2,3,6) == 7);
1156     assert(std::hypot(1,4,8) == 9);
1157 #endif
1158 }
1159 
1160 void test_ilogb()
1161 {
1162     static_assert((std::is_same<decltype(std::ilogb((float)0)), int>::value), "");
1163     static_assert((std::is_same<decltype(std::ilogb((bool)0)), int>::value), "");
1164     static_assert((std::is_same<decltype(std::ilogb((unsigned short)0)), int>::value), "");
1165     static_assert((std::is_same<decltype(std::ilogb((int)0)), int>::value), "");
1166     static_assert((std::is_same<decltype(std::ilogb((unsigned int)0)), int>::value), "");
1167     static_assert((std::is_same<decltype(std::ilogb((long)0)), int>::value), "");
1168     static_assert((std::is_same<decltype(std::ilogb((unsigned long)0)), int>::value), "");
1169     static_assert((std::is_same<decltype(std::ilogb((long long)0)), int>::value), "");
1170     static_assert((std::is_same<decltype(std::ilogb((unsigned long long)0)), int>::value), "");
1171     static_assert((std::is_same<decltype(std::ilogb((double)0)), int>::value), "");
1172     static_assert((std::is_same<decltype(std::ilogb((long double)0)), int>::value), "");
1173     static_assert((std::is_same<decltype(std::ilogbf(0)), int>::value), "");
1174     static_assert((std::is_same<decltype(std::ilogbl(0)), int>::value), "");
1175     static_assert((std::is_same<decltype(ilogb(Ambiguous())), Ambiguous>::value), "");
1176     assert(std::ilogb(1) == 0);
1177 }
1178 
1179 void test_lerp()
1180 {
1181     // See also "lerp.pass.cpp"
1182 
1183 #if TEST_STD_VER > 17
1184     static_assert((std::is_same<decltype(std::lerp((float)0, (float)0, (float)0)), float>::value), "");
1185     static_assert((std::is_same<decltype(std::lerp((float)0, (bool)0, (float)0)), double>::value), "");
1186     static_assert((std::is_same<decltype(std::lerp((float)0, (unsigned short)0, (double)0)), double>::value), "");
1187     static_assert((std::is_same<decltype(std::lerp((float)0, (int)0, (long double)0)), long double>::value), "");
1188     static_assert((std::is_same<decltype(std::lerp((float)0, (double)0, (long)0)), double>::value), "");
1189     static_assert((std::is_same<decltype(std::lerp((float)0, (long double)0, (unsigned long)0)), long double>::value), "");
1190     static_assert((std::is_same<decltype(std::lerp((float)0, (int)0, (long long)0)), double>::value), "");
1191     static_assert((std::is_same<decltype(std::lerp((float)0, (int)0, (unsigned long long)0)), double>::value), "");
1192     static_assert((std::is_same<decltype(std::lerp((float)0, (double)0, (double)0)), double>::value), "");
1193     static_assert((std::is_same<decltype(std::lerp((float)0, (long double)0, (long double)0)), long double>::value), "");
1194     static_assert((std::is_same<decltype(std::lerp((float)0, (float)0, (double)0)), double>::value), "");
1195     static_assert((std::is_same<decltype(std::lerp((float)0, (float)0, (long double)0)), long double>::value), "");
1196     static_assert((std::is_same<decltype(std::lerp((float)0, (double)0, (long double)0)), long double>::value), "");
1197     static_assert((std::is_same<decltype(std::lerp((int)0, (int)0, (int)0)), double>::value), "");
1198     static_assert((std::is_same<decltype(lerp(Ambiguous(), Ambiguous(), Ambiguous())), Ambiguous>::value), "");
1199 
1200     assert(std::lerp(2, 3, 1) == 3);
1201     assert(std::lerp(1, 3, 0.5) == 2);
1202     assert(std::lerp(0, 4.0, 0) == 0);
1203     static_assert(std::lerp(2, 3, 1) == 3);
1204     static_assert(std::lerp(1, 3, 0.5) == 2);
1205     static_assert(std::lerp(0, 4.0, 0) == 0);
1206 #endif
1207 }
1208 
1209 void test_lgamma()
1210 {
1211     static_assert((std::is_same<decltype(std::lgamma((float)0)), float>::value), "");
1212     static_assert((std::is_same<decltype(std::lgamma((bool)0)), double>::value), "");
1213     static_assert((std::is_same<decltype(std::lgamma((unsigned short)0)), double>::value), "");
1214     static_assert((std::is_same<decltype(std::lgamma((int)0)), double>::value), "");
1215     static_assert((std::is_same<decltype(std::lgamma((unsigned int)0)), double>::value), "");
1216     static_assert((std::is_same<decltype(std::lgamma((long)0)), double>::value), "");
1217     static_assert((std::is_same<decltype(std::lgamma((unsigned long)0)), double>::value), "");
1218     static_assert((std::is_same<decltype(std::lgamma((long long)0)), double>::value), "");
1219     static_assert((std::is_same<decltype(std::lgamma((unsigned long long)0)), double>::value), "");
1220     static_assert((std::is_same<decltype(std::lgamma((double)0)), double>::value), "");
1221     static_assert((std::is_same<decltype(std::lgamma((long double)0)), long double>::value), "");
1222     static_assert((std::is_same<decltype(std::lgammaf(0)), float>::value), "");
1223     static_assert((std::is_same<decltype(std::lgammal(0)), long double>::value), "");
1224     static_assert((std::is_same<decltype(lgamma(Ambiguous())), Ambiguous>::value), "");
1225     assert(std::lgamma(1) == 0);
1226 }
1227 
1228 void test_llrint()
1229 {
1230     static_assert((std::is_same<decltype(std::llrint((float)0)), long long>::value), "");
1231     static_assert((std::is_same<decltype(std::llrint((bool)0)), long long>::value), "");
1232     static_assert((std::is_same<decltype(std::llrint((unsigned short)0)), long long>::value), "");
1233     static_assert((std::is_same<decltype(std::llrint((int)0)), long long>::value), "");
1234     static_assert((std::is_same<decltype(std::llrint((unsigned int)0)), long long>::value), "");
1235     static_assert((std::is_same<decltype(std::llrint((long)0)), long long>::value), "");
1236     static_assert((std::is_same<decltype(std::llrint((unsigned long)0)), long long>::value), "");
1237     static_assert((std::is_same<decltype(std::llrint((long long)0)), long long>::value), "");
1238     static_assert((std::is_same<decltype(std::llrint((unsigned long long)0)), long long>::value), "");
1239     static_assert((std::is_same<decltype(std::llrint((double)0)), long long>::value), "");
1240     static_assert((std::is_same<decltype(std::llrint((long double)0)), long long>::value), "");
1241     static_assert((std::is_same<decltype(std::llrintf(0)), long long>::value), "");
1242     static_assert((std::is_same<decltype(std::llrintl(0)), long long>::value), "");
1243     static_assert((std::is_same<decltype(llrint(Ambiguous())), Ambiguous>::value), "");
1244     assert(std::llrint(1) == 1LL);
1245 }
1246 
1247 void test_llround()
1248 {
1249     static_assert((std::is_same<decltype(std::llround((float)0)), long long>::value), "");
1250     static_assert((std::is_same<decltype(std::llround((bool)0)), long long>::value), "");
1251     static_assert((std::is_same<decltype(std::llround((unsigned short)0)), long long>::value), "");
1252     static_assert((std::is_same<decltype(std::llround((int)0)), long long>::value), "");
1253     static_assert((std::is_same<decltype(std::llround((unsigned int)0)), long long>::value), "");
1254     static_assert((std::is_same<decltype(std::llround((long)0)), long long>::value), "");
1255     static_assert((std::is_same<decltype(std::llround((unsigned long)0)), long long>::value), "");
1256     static_assert((std::is_same<decltype(std::llround((long long)0)), long long>::value), "");
1257     static_assert((std::is_same<decltype(std::llround((unsigned long long)0)), long long>::value), "");
1258     static_assert((std::is_same<decltype(std::llround((double)0)), long long>::value), "");
1259     static_assert((std::is_same<decltype(std::llround((long double)0)), long long>::value), "");
1260     static_assert((std::is_same<decltype(std::llroundf(0)), long long>::value), "");
1261     static_assert((std::is_same<decltype(std::llroundl(0)), long long>::value), "");
1262     static_assert((std::is_same<decltype(llround(Ambiguous())), Ambiguous>::value), "");
1263     assert(std::llround(1) == 1LL);
1264 }
1265 
1266 void test_log1p()
1267 {
1268     static_assert((std::is_same<decltype(std::log1p((float)0)), float>::value), "");
1269     static_assert((std::is_same<decltype(std::log1p((bool)0)), double>::value), "");
1270     static_assert((std::is_same<decltype(std::log1p((unsigned short)0)), double>::value), "");
1271     static_assert((std::is_same<decltype(std::log1p((int)0)), double>::value), "");
1272     static_assert((std::is_same<decltype(std::log1p((unsigned int)0)), double>::value), "");
1273     static_assert((std::is_same<decltype(std::log1p((long)0)), double>::value), "");
1274     static_assert((std::is_same<decltype(std::log1p((unsigned long)0)), double>::value), "");
1275     static_assert((std::is_same<decltype(std::log1p((long long)0)), double>::value), "");
1276     static_assert((std::is_same<decltype(std::log1p((unsigned long long)0)), double>::value), "");
1277     static_assert((std::is_same<decltype(std::log1p((double)0)), double>::value), "");
1278     static_assert((std::is_same<decltype(std::log1p((long double)0)), long double>::value), "");
1279     static_assert((std::is_same<decltype(std::log1pf(0)), float>::value), "");
1280     static_assert((std::is_same<decltype(std::log1pl(0)), long double>::value), "");
1281     static_assert((std::is_same<decltype(log1p(Ambiguous())), Ambiguous>::value), "");
1282     assert(std::log1p(0) == 0);
1283 }
1284 
1285 void test_log2()
1286 {
1287     static_assert((std::is_same<decltype(std::log2((float)0)), float>::value), "");
1288     static_assert((std::is_same<decltype(std::log2((bool)0)), double>::value), "");
1289     static_assert((std::is_same<decltype(std::log2((unsigned short)0)), double>::value), "");
1290     static_assert((std::is_same<decltype(std::log2((int)0)), double>::value), "");
1291     static_assert((std::is_same<decltype(std::log2((unsigned int)0)), double>::value), "");
1292     static_assert((std::is_same<decltype(std::log2((long)0)), double>::value), "");
1293     static_assert((std::is_same<decltype(std::log2((unsigned long)0)), double>::value), "");
1294     static_assert((std::is_same<decltype(std::log2((long long)0)), double>::value), "");
1295     static_assert((std::is_same<decltype(std::log2((unsigned long long)0)), double>::value), "");
1296     static_assert((std::is_same<decltype(std::log2((double)0)), double>::value), "");
1297     static_assert((std::is_same<decltype(std::log2((long double)0)), long double>::value), "");
1298     static_assert((std::is_same<decltype(std::log2f(0)), float>::value), "");
1299     static_assert((std::is_same<decltype(std::log2l(0)), long double>::value), "");
1300     static_assert((std::is_same<decltype(log2(Ambiguous())), Ambiguous>::value), "");
1301     assert(std::log2(1) == 0);
1302 }
1303 
1304 void test_logb()
1305 {
1306     static_assert((std::is_same<decltype(std::logb((float)0)), float>::value), "");
1307     static_assert((std::is_same<decltype(std::logb((bool)0)), double>::value), "");
1308     static_assert((std::is_same<decltype(std::logb((unsigned short)0)), double>::value), "");
1309     static_assert((std::is_same<decltype(std::logb((int)0)), double>::value), "");
1310     static_assert((std::is_same<decltype(std::logb((unsigned int)0)), double>::value), "");
1311     static_assert((std::is_same<decltype(std::logb((long)0)), double>::value), "");
1312     static_assert((std::is_same<decltype(std::logb((unsigned long)0)), double>::value), "");
1313     static_assert((std::is_same<decltype(std::logb((long long)0)), double>::value), "");
1314     static_assert((std::is_same<decltype(std::logb((unsigned long long)0)), double>::value), "");
1315     static_assert((std::is_same<decltype(std::logb((double)0)), double>::value), "");
1316     static_assert((std::is_same<decltype(std::logb((long double)0)), long double>::value), "");
1317     static_assert((std::is_same<decltype(std::logbf(0)), float>::value), "");
1318     static_assert((std::is_same<decltype(std::logbl(0)), long double>::value), "");
1319     static_assert((std::is_same<decltype(logb(Ambiguous())), Ambiguous>::value), "");
1320     assert(std::logb(1) == 0);
1321 }
1322 
1323 void test_lrint()
1324 {
1325     static_assert((std::is_same<decltype(std::lrint((float)0)), long>::value), "");
1326     static_assert((std::is_same<decltype(std::lrint((bool)0)), long>::value), "");
1327     static_assert((std::is_same<decltype(std::lrint((unsigned short)0)), long>::value), "");
1328     static_assert((std::is_same<decltype(std::lrint((int)0)), long>::value), "");
1329     static_assert((std::is_same<decltype(std::lrint((unsigned int)0)), long>::value), "");
1330     static_assert((std::is_same<decltype(std::lrint((long)0)), long>::value), "");
1331     static_assert((std::is_same<decltype(std::lrint((unsigned long)0)), long>::value), "");
1332     static_assert((std::is_same<decltype(std::lrint((long long)0)), long>::value), "");
1333     static_assert((std::is_same<decltype(std::lrint((unsigned long long)0)), long>::value), "");
1334     static_assert((std::is_same<decltype(std::lrint((double)0)), long>::value), "");
1335     static_assert((std::is_same<decltype(std::lrint((long double)0)), long>::value), "");
1336     static_assert((std::is_same<decltype(std::lrintf(0)), long>::value), "");
1337     static_assert((std::is_same<decltype(std::lrintl(0)), long>::value), "");
1338     static_assert((std::is_same<decltype(lrint(Ambiguous())), Ambiguous>::value), "");
1339     assert(std::lrint(1) == 1L);
1340 }
1341 
1342 void test_lround()
1343 {
1344     static_assert((std::is_same<decltype(std::lround((float)0)), long>::value), "");
1345     static_assert((std::is_same<decltype(std::lround((bool)0)), long>::value), "");
1346     static_assert((std::is_same<decltype(std::lround((unsigned short)0)), long>::value), "");
1347     static_assert((std::is_same<decltype(std::lround((int)0)), long>::value), "");
1348     static_assert((std::is_same<decltype(std::lround((unsigned int)0)), long>::value), "");
1349     static_assert((std::is_same<decltype(std::lround((long)0)), long>::value), "");
1350     static_assert((std::is_same<decltype(std::lround((unsigned long)0)), long>::value), "");
1351     static_assert((std::is_same<decltype(std::lround((long long)0)), long>::value), "");
1352     static_assert((std::is_same<decltype(std::lround((unsigned long long)0)), long>::value), "");
1353     static_assert((std::is_same<decltype(std::lround((double)0)), long>::value), "");
1354     static_assert((std::is_same<decltype(std::lround((long double)0)), long>::value), "");
1355     static_assert((std::is_same<decltype(std::lroundf(0)), long>::value), "");
1356     static_assert((std::is_same<decltype(std::lroundl(0)), long>::value), "");
1357     static_assert((std::is_same<decltype(lround(Ambiguous())), Ambiguous>::value), "");
1358     assert(std::lround(1) == 1L);
1359 }
1360 
1361 void test_nan()
1362 {
1363     static_assert((std::is_same<decltype(std::nan("")), double>::value), "");
1364     static_assert((std::is_same<decltype(std::nanf("")), float>::value), "");
1365     static_assert((std::is_same<decltype(std::nanl("")), long double>::value), "");
1366 }
1367 
1368 void test_nearbyint()
1369 {
1370     static_assert((std::is_same<decltype(std::nearbyint((float)0)), float>::value), "");
1371     static_assert((std::is_same<decltype(std::nearbyint((bool)0)), double>::value), "");
1372     static_assert((std::is_same<decltype(std::nearbyint((unsigned short)0)), double>::value), "");
1373     static_assert((std::is_same<decltype(std::nearbyint((int)0)), double>::value), "");
1374     static_assert((std::is_same<decltype(std::nearbyint((unsigned int)0)), double>::value), "");
1375     static_assert((std::is_same<decltype(std::nearbyint((long)0)), double>::value), "");
1376     static_assert((std::is_same<decltype(std::nearbyint((unsigned long)0)), double>::value), "");
1377     static_assert((std::is_same<decltype(std::nearbyint((long long)0)), double>::value), "");
1378     static_assert((std::is_same<decltype(std::nearbyint((unsigned long long)0)), double>::value), "");
1379     static_assert((std::is_same<decltype(std::nearbyint((double)0)), double>::value), "");
1380     static_assert((std::is_same<decltype(std::nearbyint((long double)0)), long double>::value), "");
1381     static_assert((std::is_same<decltype(std::nearbyintf(0)), float>::value), "");
1382     static_assert((std::is_same<decltype(std::nearbyintl(0)), long double>::value), "");
1383     static_assert((std::is_same<decltype(nearbyint(Ambiguous())), Ambiguous>::value), "");
1384     assert(std::nearbyint(1) == 1);
1385 }
1386 
1387 void test_nextafter()
1388 {
1389     static_assert((std::is_same<decltype(std::nextafter((float)0, (float)0)), float>::value), "");
1390     static_assert((std::is_same<decltype(std::nextafter((bool)0, (float)0)), double>::value), "");
1391     static_assert((std::is_same<decltype(std::nextafter((unsigned short)0, (double)0)), double>::value), "");
1392     static_assert((std::is_same<decltype(std::nextafter((int)0, (long double)0)), long double>::value), "");
1393     static_assert((std::is_same<decltype(std::nextafter((float)0, (unsigned int)0)), double>::value), "");
1394     static_assert((std::is_same<decltype(std::nextafter((double)0, (long)0)), double>::value), "");
1395     static_assert((std::is_same<decltype(std::nextafter((long double)0, (unsigned long)0)), long double>::value), "");
1396     static_assert((std::is_same<decltype(std::nextafter((int)0, (long long)0)), double>::value), "");
1397     static_assert((std::is_same<decltype(std::nextafter((int)0, (unsigned long long)0)), double>::value), "");
1398     static_assert((std::is_same<decltype(std::nextafter((double)0, (double)0)), double>::value), "");
1399     static_assert((std::is_same<decltype(std::nextafter((long double)0, (long double)0)), long double>::value), "");
1400     static_assert((std::is_same<decltype(std::nextafter((float)0, (double)0)), double>::value), "");
1401     static_assert((std::is_same<decltype(std::nextafter((float)0, (long double)0)), long double>::value), "");
1402     static_assert((std::is_same<decltype(std::nextafter((double)0, (long double)0)), long double>::value), "");
1403     static_assert((std::is_same<decltype(std::nextafterf(0,0)), float>::value), "");
1404     static_assert((std::is_same<decltype(std::nextafterl(0,0)), long double>::value), "");
1405     static_assert((std::is_same<decltype(std::nextafter((int)0, (int)0)), double>::value), "");
1406     static_assert((std::is_same<decltype(nextafter(Ambiguous(), Ambiguous())), Ambiguous>::value), "");
1407     assert(std::nextafter(0,1) == hexfloat<double>(0x1, 0, -1074));
1408 }
1409 
1410 void test_nexttoward()
1411 {
1412     static_assert((std::is_same<decltype(std::nexttoward((float)0, (long double)0)), float>::value), "");
1413     static_assert((std::is_same<decltype(std::nexttoward((bool)0, (long double)0)), double>::value), "");
1414     static_assert((std::is_same<decltype(std::nexttoward((unsigned short)0, (long double)0)), double>::value), "");
1415     static_assert((std::is_same<decltype(std::nexttoward((int)0, (long double)0)), double>::value), "");
1416     static_assert((std::is_same<decltype(std::nexttoward((unsigned int)0, (long double)0)), double>::value), "");
1417     static_assert((std::is_same<decltype(std::nexttoward((long)0, (long double)0)), double>::value), "");
1418     static_assert((std::is_same<decltype(std::nexttoward((unsigned long)0, (long double)0)), double>::value), "");
1419     static_assert((std::is_same<decltype(std::nexttoward((long long)0, (long double)0)), double>::value), "");
1420     static_assert((std::is_same<decltype(std::nexttoward((unsigned long long)0, (long double)0)), double>::value), "");
1421     static_assert((std::is_same<decltype(std::nexttoward((double)0, (long double)0)), double>::value), "");
1422     static_assert((std::is_same<decltype(std::nexttoward((long double)0, (long double)0)), long double>::value), "");
1423     static_assert((std::is_same<decltype(std::nexttowardf(0, (long double)0)), float>::value), "");
1424     static_assert((std::is_same<decltype(std::nexttowardl(0, (long double)0)), long double>::value), "");
1425     static_assert((std::is_same<decltype(nexttoward(Ambiguous(), Ambiguous())), Ambiguous>::value), "");
1426     assert(std::nexttoward(0, 1) == hexfloat<double>(0x1, 0, -1074));
1427 }
1428 
1429 void test_remainder()
1430 {
1431     static_assert((std::is_same<decltype(std::remainder((float)0, (float)0)), float>::value), "");
1432     static_assert((std::is_same<decltype(std::remainder((bool)0, (float)0)), double>::value), "");
1433     static_assert((std::is_same<decltype(std::remainder((unsigned short)0, (double)0)), double>::value), "");
1434     static_assert((std::is_same<decltype(std::remainder((int)0, (long double)0)), long double>::value), "");
1435     static_assert((std::is_same<decltype(std::remainder((float)0, (unsigned int)0)), double>::value), "");
1436     static_assert((std::is_same<decltype(std::remainder((double)0, (long)0)), double>::value), "");
1437     static_assert((std::is_same<decltype(std::remainder((long double)0, (unsigned long)0)), long double>::value), "");
1438     static_assert((std::is_same<decltype(std::remainder((int)0, (long long)0)), double>::value), "");
1439     static_assert((std::is_same<decltype(std::remainder((int)0, (unsigned long long)0)), double>::value), "");
1440     static_assert((std::is_same<decltype(std::remainder((double)0, (double)0)), double>::value), "");
1441     static_assert((std::is_same<decltype(std::remainder((long double)0, (long double)0)), long double>::value), "");
1442     static_assert((std::is_same<decltype(std::remainder((float)0, (double)0)), double>::value), "");
1443     static_assert((std::is_same<decltype(std::remainder((float)0, (long double)0)), long double>::value), "");
1444     static_assert((std::is_same<decltype(std::remainder((double)0, (long double)0)), long double>::value), "");
1445     static_assert((std::is_same<decltype(std::remainderf(0,0)), float>::value), "");
1446     static_assert((std::is_same<decltype(std::remainderl(0,0)), long double>::value), "");
1447     static_assert((std::is_same<decltype(std::remainder((int)0, (int)0)), double>::value), "");
1448     static_assert((std::is_same<decltype(remainder(Ambiguous(), Ambiguous())), Ambiguous>::value), "");
1449     assert(std::remainder(0.5,1) == 0.5);
1450 }
1451 
1452 void test_remquo()
1453 {
1454     int ip;
1455     static_assert((std::is_same<decltype(std::remquo((float)0, (float)0, &ip)), float>::value), "");
1456     static_assert((std::is_same<decltype(std::remquo((bool)0, (float)0, &ip)), double>::value), "");
1457     static_assert((std::is_same<decltype(std::remquo((unsigned short)0, (double)0, &ip)), double>::value), "");
1458     static_assert((std::is_same<decltype(std::remquo((int)0, (long double)0, &ip)), long double>::value), "");
1459     static_assert((std::is_same<decltype(std::remquo((float)0, (unsigned int)0, &ip)), double>::value), "");
1460     static_assert((std::is_same<decltype(std::remquo((double)0, (long)0, &ip)), double>::value), "");
1461     static_assert((std::is_same<decltype(std::remquo((long double)0, (unsigned long)0, &ip)), long double>::value), "");
1462     static_assert((std::is_same<decltype(std::remquo((int)0, (long long)0, &ip)), double>::value), "");
1463     static_assert((std::is_same<decltype(std::remquo((int)0, (unsigned long long)0, &ip)), double>::value), "");
1464     static_assert((std::is_same<decltype(std::remquo((double)0, (double)0, &ip)), double>::value), "");
1465     static_assert((std::is_same<decltype(std::remquo((long double)0, (long double)0, &ip)), long double>::value), "");
1466     static_assert((std::is_same<decltype(std::remquo((float)0, (double)0, &ip)), double>::value), "");
1467     static_assert((std::is_same<decltype(std::remquo((float)0, (long double)0, &ip)), long double>::value), "");
1468     static_assert((std::is_same<decltype(std::remquo((double)0, (long double)0, &ip)), long double>::value), "");
1469     static_assert((std::is_same<decltype(std::remquof(0,0, &ip)), float>::value), "");
1470     static_assert((std::is_same<decltype(std::remquol(0,0, &ip)), long double>::value), "");
1471     static_assert((std::is_same<decltype(std::remquo((int)0, (int)0, &ip)), double>::value), "");
1472     static_assert((std::is_same<decltype(remquo(Ambiguous(), Ambiguous(), &ip)), Ambiguous>::value), "");
1473     assert(std::remquo(0.5,1, &ip) == 0.5);
1474 }
1475 
1476 void test_rint()
1477 {
1478     static_assert((std::is_same<decltype(std::rint((float)0)), float>::value), "");
1479     static_assert((std::is_same<decltype(std::rint((bool)0)), double>::value), "");
1480     static_assert((std::is_same<decltype(std::rint((unsigned short)0)), double>::value), "");
1481     static_assert((std::is_same<decltype(std::rint((int)0)), double>::value), "");
1482     static_assert((std::is_same<decltype(std::rint((unsigned int)0)), double>::value), "");
1483     static_assert((std::is_same<decltype(std::rint((long)0)), double>::value), "");
1484     static_assert((std::is_same<decltype(std::rint((unsigned long)0)), double>::value), "");
1485     static_assert((std::is_same<decltype(std::rint((long long)0)), double>::value), "");
1486     static_assert((std::is_same<decltype(std::rint((unsigned long long)0)), double>::value), "");
1487     static_assert((std::is_same<decltype(std::rint((double)0)), double>::value), "");
1488     static_assert((std::is_same<decltype(std::rint((long double)0)), long double>::value), "");
1489     static_assert((std::is_same<decltype(std::rintf(0)), float>::value), "");
1490     static_assert((std::is_same<decltype(std::rintl(0)), long double>::value), "");
1491     static_assert((std::is_same<decltype(rint(Ambiguous())), Ambiguous>::value), "");
1492     assert(std::rint(1) == 1);
1493 }
1494 
1495 void test_round()
1496 {
1497     static_assert((std::is_same<decltype(std::round((float)0)), float>::value), "");
1498     static_assert((std::is_same<decltype(std::round((bool)0)), double>::value), "");
1499     static_assert((std::is_same<decltype(std::round((unsigned short)0)), double>::value), "");
1500     static_assert((std::is_same<decltype(std::round((int)0)), double>::value), "");
1501     static_assert((std::is_same<decltype(std::round((unsigned int)0)), double>::value), "");
1502     static_assert((std::is_same<decltype(std::round((long)0)), double>::value), "");
1503     static_assert((std::is_same<decltype(std::round((unsigned long)0)), double>::value), "");
1504     static_assert((std::is_same<decltype(std::round((long long)0)), double>::value), "");
1505     static_assert((std::is_same<decltype(std::round((unsigned long long)0)), double>::value), "");
1506     static_assert((std::is_same<decltype(std::round((double)0)), double>::value), "");
1507     static_assert((std::is_same<decltype(std::round((long double)0)), long double>::value), "");
1508     static_assert((std::is_same<decltype(std::roundf(0)), float>::value), "");
1509     static_assert((std::is_same<decltype(std::roundl(0)), long double>::value), "");
1510     static_assert((std::is_same<decltype(round(Ambiguous())), Ambiguous>::value), "");
1511     assert(std::round(1) == 1);
1512 }
1513 
1514 void test_scalbln()
1515 {
1516     static_assert((std::is_same<decltype(std::scalbln((float)0, (long)0)), float>::value), "");
1517     static_assert((std::is_same<decltype(std::scalbln((bool)0, (long)0)), double>::value), "");
1518     static_assert((std::is_same<decltype(std::scalbln((unsigned short)0, (long)0)), double>::value), "");
1519     static_assert((std::is_same<decltype(std::scalbln((int)0, (long)0)), double>::value), "");
1520     static_assert((std::is_same<decltype(std::scalbln((unsigned int)0, (long)0)), double>::value), "");
1521     static_assert((std::is_same<decltype(std::scalbln((long)0, (long)0)), double>::value), "");
1522     static_assert((std::is_same<decltype(std::scalbln((unsigned long)0, (long)0)), double>::value), "");
1523     static_assert((std::is_same<decltype(std::scalbln((long long)0, (long)0)), double>::value), "");
1524     static_assert((std::is_same<decltype(std::scalbln((unsigned long long)0, (long)0)), double>::value), "");
1525     static_assert((std::is_same<decltype(std::scalbln((double)0, (long)0)), double>::value), "");
1526     static_assert((std::is_same<decltype(std::scalbln((long double)0, (long)0)), long double>::value), "");
1527     static_assert((std::is_same<decltype(std::scalblnf(0, (long)0)), float>::value), "");
1528     static_assert((std::is_same<decltype(std::scalblnl(0, (long)0)), long double>::value), "");
1529     static_assert((std::is_same<decltype(scalbln(Ambiguous(), Ambiguous())), Ambiguous>::value), "");
1530     assert(std::scalbln(1, 1) == 2);
1531 }
1532 
1533 void test_scalbn()
1534 {
1535     static_assert((std::is_same<decltype(std::scalbn((float)0, (int)0)), float>::value), "");
1536     static_assert((std::is_same<decltype(std::scalbn((bool)0, (int)0)), double>::value), "");
1537     static_assert((std::is_same<decltype(std::scalbn((unsigned short)0, (int)0)), double>::value), "");
1538     static_assert((std::is_same<decltype(std::scalbn((int)0, (int)0)), double>::value), "");
1539     static_assert((std::is_same<decltype(std::scalbn((unsigned int)0, (int)0)), double>::value), "");
1540     static_assert((std::is_same<decltype(std::scalbn((long)0, (int)0)), double>::value), "");
1541     static_assert((std::is_same<decltype(std::scalbn((unsigned long)0, (int)0)), double>::value), "");
1542     static_assert((std::is_same<decltype(std::scalbn((long long)0, (int)0)), double>::value), "");
1543     static_assert((std::is_same<decltype(std::scalbn((unsigned long long)0, (int)0)), double>::value), "");
1544     static_assert((std::is_same<decltype(std::scalbn((double)0, (int)0)), double>::value), "");
1545     static_assert((std::is_same<decltype(std::scalbn((long double)0, (int)0)), long double>::value), "");
1546     static_assert((std::is_same<decltype(std::scalbnf(0, (int)0)), float>::value), "");
1547     static_assert((std::is_same<decltype(std::scalbnl(0, (int)0)), long double>::value), "");
1548     static_assert((std::is_same<decltype(scalbn(Ambiguous(), Ambiguous())), Ambiguous>::value), "");
1549     assert(std::scalbn(1, 1) == 2);
1550 }
1551 
1552 void test_tgamma()
1553 {
1554     static_assert((std::is_same<decltype(std::tgamma((float)0)), float>::value), "");
1555     static_assert((std::is_same<decltype(std::tgamma((bool)0)), double>::value), "");
1556     static_assert((std::is_same<decltype(std::tgamma((unsigned short)0)), double>::value), "");
1557     static_assert((std::is_same<decltype(std::tgamma((int)0)), double>::value), "");
1558     static_assert((std::is_same<decltype(std::tgamma((unsigned int)0)), double>::value), "");
1559     static_assert((std::is_same<decltype(std::tgamma((long)0)), double>::value), "");
1560     static_assert((std::is_same<decltype(std::tgamma((unsigned long)0)), double>::value), "");
1561     static_assert((std::is_same<decltype(std::tgamma((long long)0)), double>::value), "");
1562     static_assert((std::is_same<decltype(std::tgamma((unsigned long long)0)), double>::value), "");
1563     static_assert((std::is_same<decltype(std::tgamma((double)0)), double>::value), "");
1564     static_assert((std::is_same<decltype(std::tgamma((long double)0)), long double>::value), "");
1565     static_assert((std::is_same<decltype(std::tgammaf(0)), float>::value), "");
1566     static_assert((std::is_same<decltype(std::tgammal(0)), long double>::value), "");
1567     static_assert((std::is_same<decltype(tgamma(Ambiguous())), Ambiguous>::value), "");
1568     assert(std::tgamma(1) == 1);
1569 }
1570 
1571 void test_trunc()
1572 {
1573     static_assert((std::is_same<decltype(std::trunc((float)0)), float>::value), "");
1574     static_assert((std::is_same<decltype(std::trunc((bool)0)), double>::value), "");
1575     static_assert((std::is_same<decltype(std::trunc((unsigned short)0)), double>::value), "");
1576     static_assert((std::is_same<decltype(std::trunc((int)0)), double>::value), "");
1577     static_assert((std::is_same<decltype(std::trunc((unsigned int)0)), double>::value), "");
1578     static_assert((std::is_same<decltype(std::trunc((long)0)), double>::value), "");
1579     static_assert((std::is_same<decltype(std::trunc((unsigned long)0)), double>::value), "");
1580     static_assert((std::is_same<decltype(std::trunc((long long)0)), double>::value), "");
1581     static_assert((std::is_same<decltype(std::trunc((unsigned long long)0)), double>::value), "");
1582     static_assert((std::is_same<decltype(std::trunc((double)0)), double>::value), "");
1583     static_assert((std::is_same<decltype(std::trunc((long double)0)), long double>::value), "");
1584     static_assert((std::is_same<decltype(std::truncf(0)), float>::value), "");
1585     static_assert((std::is_same<decltype(std::truncl(0)), long double>::value), "");
1586     static_assert((std::is_same<decltype(trunc(Ambiguous())), Ambiguous>::value), "");
1587     assert(std::trunc(1) == 1);
1588 }
1589 
1590 int main(int, char**)
1591 {
1592     test_abs();
1593     test_acos();
1594     test_asin();
1595     test_atan();
1596     test_atan2();
1597     test_ceil();
1598     test_cos();
1599     test_cosh();
1600     test_exp();
1601     test_fabs();
1602     test_floor();
1603     test_fmod();
1604     test_frexp();
1605     test_ldexp();
1606     test_log();
1607     test_log10();
1608     test_modf();
1609     test_pow();
1610     test_sin();
1611     test_sinh();
1612     test_sqrt();
1613     test_tan();
1614     test_tanh();
1615     test_signbit();
1616     test_fpclassify();
1617     test_isfinite();
1618     test_isnormal();
1619     test_isgreater();
1620     test_isgreaterequal();
1621     test_isinf();
1622     test_isless();
1623     test_islessequal();
1624     test_islessgreater();
1625     test_isnan();
1626     test_isunordered();
1627     test_acosh();
1628     test_asinh();
1629     test_atanh();
1630     test_cbrt();
1631     test_copysign();
1632     test_erf();
1633     test_erfc();
1634     test_exp2();
1635     test_expm1();
1636     test_fdim();
1637     test_fma();
1638     test_fmax();
1639     test_fmin();
1640     test_hypot();
1641     test_ilogb();
1642     test_lerp();
1643     test_lgamma();
1644     test_llrint();
1645     test_llround();
1646     test_log1p();
1647     test_log2();
1648     test_logb();
1649     test_lrint();
1650     test_lround();
1651     test_nan();
1652     test_nearbyint();
1653     test_nextafter();
1654     test_nexttoward();
1655     test_remainder();
1656     test_remquo();
1657     test_rint();
1658     test_round();
1659     test_scalbln();
1660     test_scalbn();
1661     test_tgamma();
1662     test_trunc();
1663 
1664   return 0;
1665 }
1666