xref: /llvm-project/libcxx/test/std/numerics/c.math/cmath.pass.cpp (revision 14324fa4285f5cd1e421a6cebdceb05d6c49a8dc) 
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 // <cmath>
10 
11 #include <cmath>
12 #include <limits>
13 #include <type_traits>
14 #include <cassert>
15 
16 #include "test_macros.h"
17 #include "hexfloat.h"
18 #include "truncate_fp.h"
19 
20 // convertible to int/float/double/etc
21 template <class T, int N=0>
22 struct Value {
23     operator T () { return T(N); }
24 };
25 
26 // See PR21083
27 // Ambiguous is a user-defined type that defines its own overloads of cmath
28 // functions. When the std overloads are candidates too (by using or adl),
29 // they should not interfere.
30 struct Ambiguous : std::true_type { // ADL
31     operator float () { return 0.f; }
32     operator double () { return 0.; }
33 };
34 Ambiguous abs(Ambiguous){ return Ambiguous(); }
35 Ambiguous acos(Ambiguous){ return Ambiguous(); }
36 Ambiguous asin(Ambiguous){ return Ambiguous(); }
37 Ambiguous atan(Ambiguous){ return Ambiguous(); }
38 Ambiguous atan2(Ambiguous, Ambiguous){ return Ambiguous(); }
39 Ambiguous ceil(Ambiguous){ return Ambiguous(); }
40 Ambiguous cos(Ambiguous){ return Ambiguous(); }
41 Ambiguous cosh(Ambiguous){ return Ambiguous(); }
42 Ambiguous exp(Ambiguous){ return Ambiguous(); }
43 Ambiguous fabs(Ambiguous){ return Ambiguous(); }
44 Ambiguous floor(Ambiguous){ return Ambiguous(); }
45 Ambiguous fmod(Ambiguous, Ambiguous){ return Ambiguous(); }
46 Ambiguous frexp(Ambiguous, int*){ return Ambiguous(); }
47 Ambiguous ldexp(Ambiguous, int){ return Ambiguous(); }
48 Ambiguous log(Ambiguous){ return Ambiguous(); }
49 Ambiguous log10(Ambiguous){ return Ambiguous(); }
50 Ambiguous modf(Ambiguous, Ambiguous*){ return Ambiguous(); }
51 Ambiguous pow(Ambiguous, Ambiguous){ return Ambiguous(); }
52 Ambiguous sin(Ambiguous){ return Ambiguous(); }
53 Ambiguous sinh(Ambiguous){ return Ambiguous(); }
54 Ambiguous sqrt(Ambiguous){ return Ambiguous(); }
55 Ambiguous tan(Ambiguous){ return Ambiguous(); }
56 Ambiguous tanh(Ambiguous){ return Ambiguous(); }
57 Ambiguous signbit(Ambiguous){ return Ambiguous(); }
58 Ambiguous fpclassify(Ambiguous){ return Ambiguous(); }
59 Ambiguous isfinite(Ambiguous){ return Ambiguous(); }
60 Ambiguous isnormal(Ambiguous){ return Ambiguous(); }
61 Ambiguous isgreater(Ambiguous, Ambiguous){ return Ambiguous(); }
62 Ambiguous isgreaterequal(Ambiguous, Ambiguous){ return Ambiguous(); }
63 Ambiguous isless(Ambiguous, Ambiguous){ return Ambiguous(); }
64 Ambiguous islessequal(Ambiguous, Ambiguous){ return Ambiguous(); }
65 Ambiguous islessgreater(Ambiguous, Ambiguous){ return Ambiguous(); }
66 Ambiguous isunordered(Ambiguous, Ambiguous){ return Ambiguous(); }
67 Ambiguous acosh(Ambiguous){ return Ambiguous(); }
68 Ambiguous asinh(Ambiguous){ return Ambiguous(); }
69 Ambiguous atanh(Ambiguous){ return Ambiguous(); }
70 Ambiguous cbrt(Ambiguous){ return Ambiguous(); }
71 Ambiguous copysign(Ambiguous, Ambiguous){ return Ambiguous(); }
72 Ambiguous erf(Ambiguous){ return Ambiguous(); }
73 Ambiguous erfc(Ambiguous){ return Ambiguous(); }
74 Ambiguous exp2(Ambiguous){ return Ambiguous(); }
75 Ambiguous expm1(Ambiguous){ return Ambiguous(); }
76 Ambiguous fdim(Ambiguous, Ambiguous){ return Ambiguous(); }
77 Ambiguous fma(Ambiguous, Ambiguous, Ambiguous){ return Ambiguous(); }
78 Ambiguous fmax(Ambiguous, Ambiguous){ return Ambiguous(); }
79 Ambiguous fmin(Ambiguous, Ambiguous){ return Ambiguous(); }
80 Ambiguous hypot(Ambiguous, Ambiguous){ return Ambiguous(); }
81 Ambiguous hypot(Ambiguous, Ambiguous, Ambiguous){ return Ambiguous(); }
82 Ambiguous ilogb(Ambiguous){ return Ambiguous(); }
83 Ambiguous lerp(Ambiguous, Ambiguous, Ambiguous){ return Ambiguous(); }
84 Ambiguous lgamma(Ambiguous){ return Ambiguous(); }
85 Ambiguous llrint(Ambiguous){ return Ambiguous(); }
86 Ambiguous llround(Ambiguous){ return Ambiguous(); }
87 Ambiguous log1p(Ambiguous){ return Ambiguous(); }
88 Ambiguous log2(Ambiguous){ return Ambiguous(); }
89 Ambiguous logb(Ambiguous){ return Ambiguous(); }
90 Ambiguous lrint(Ambiguous){ return Ambiguous(); }
91 Ambiguous lround(Ambiguous){ return Ambiguous(); }
92 Ambiguous nearbyint(Ambiguous){ return Ambiguous(); }
93 Ambiguous nextafter(Ambiguous, Ambiguous){ return Ambiguous(); }
94 Ambiguous nexttoward(Ambiguous, Ambiguous){ return Ambiguous(); }
95 Ambiguous remainder(Ambiguous, Ambiguous){ return Ambiguous(); }
96 Ambiguous remquo(Ambiguous, Ambiguous, int*){ return Ambiguous(); }
97 Ambiguous rint(Ambiguous){ return Ambiguous(); }
98 Ambiguous round(Ambiguous){ return Ambiguous(); }
99 Ambiguous scalbln(Ambiguous, Ambiguous){ return Ambiguous(); }
100 Ambiguous scalbn(Ambiguous, Ambiguous){ return Ambiguous(); }
101 Ambiguous tgamma(Ambiguous){ return Ambiguous(); }
102 Ambiguous trunc(Ambiguous){ return Ambiguous(); }
103 
104 template <class T, class = decltype(std::abs(std::declval<T>()))>
105 std::true_type has_abs_imp(int);
106 template <class T>
107 std::false_type has_abs_imp(...);
108 
109 template <class T>
110 struct has_abs : decltype(has_abs_imp<T>(0)) {};
111 
112 void test_abs()
113 {
114     // See also "abs.pass.cpp"
115 
116     TEST_DIAGNOSTIC_PUSH
117     TEST_CLANG_DIAGNOSTIC_IGNORED("-Wabsolute-value")
118 
119     static_assert((std::is_same<decltype(std::abs((float)0)), float>::value), "");
120     static_assert((std::is_same<decltype(std::abs((double)0)), double>::value), "");
121     static_assert((std::is_same<decltype(std::abs((long double)0)), long double>::value), "");
122     static_assert((std::is_same<decltype(std::abs((int)0)), int>::value), "");
123     static_assert((std::is_same<decltype(std::abs((long)0)), long>::value), "");
124     static_assert((std::is_same<decltype(std::abs((long long)0)), long long>::value), "");
125     static_assert((std::is_same<decltype(std::abs((unsigned char)0)), int>::value), "");
126     static_assert((std::is_same<decltype(std::abs((unsigned short)0)), int>::value), "");
127     static_assert((std::is_same<decltype(std::abs((signed char)0)), int>::value), "");
128     static_assert((std::is_same<decltype(std::abs((short)0)), int>::value), "");
129     static_assert((std::is_same<decltype(std::abs((unsigned char)0)), int>::value), "");
130     static_assert((std::is_same<decltype(std::abs((char)0)), int>::value), "");
131     static_assert((std::is_same<decltype(abs(Ambiguous())), Ambiguous>::value), "");
132 
133     static_assert(!has_abs<unsigned>::value, "");
134     static_assert(!has_abs<unsigned long>::value, "");
135     static_assert(!has_abs<unsigned long long>::value, "");
136     static_assert(!has_abs<size_t>::value, "");
137 
138     TEST_DIAGNOSTIC_POP
139 
140     assert(std::abs(-1.) == 1);
141 }
142 
143 
144 void test_acos()
145 {
146     static_assert((std::is_same<decltype(std::acos((float)0)), float>::value), "");
147     static_assert((std::is_same<decltype(std::acos((bool)0)), double>::value), "");
148     static_assert((std::is_same<decltype(std::acos((unsigned short)0)), double>::value), "");
149     static_assert((std::is_same<decltype(std::acos((int)0)), double>::value), "");
150     static_assert((std::is_same<decltype(std::acos((unsigned int)0)), double>::value), "");
151     static_assert((std::is_same<decltype(std::acos((long)0)), double>::value), "");
152     static_assert((std::is_same<decltype(std::acos((unsigned long)0)), double>::value), "");
153     static_assert((std::is_same<decltype(std::acos((long long)0)), double>::value), "");
154     static_assert((std::is_same<decltype(std::acos((unsigned long long)0)), double>::value), "");
155     static_assert((std::is_same<decltype(std::acos((double)0)), double>::value), "");
156     static_assert((std::is_same<decltype(std::acos((long double)0)), long double>::value), "");
157     static_assert((std::is_same<decltype(std::acosf(0)), float>::value), "");
158     static_assert((std::is_same<decltype(std::acosl(0)), long double>::value), "");
159     static_assert((std::is_same<decltype(acos(Ambiguous())), Ambiguous>::value), "");
160     assert(std::acos(1) == 0);
161 }
162 
163 void test_asin()
164 {
165     static_assert((std::is_same<decltype(std::asin((float)0)), float>::value), "");
166     static_assert((std::is_same<decltype(std::asin((bool)0)), double>::value), "");
167     static_assert((std::is_same<decltype(std::asin((unsigned short)0)), double>::value), "");
168     static_assert((std::is_same<decltype(std::asin((int)0)), double>::value), "");
169     static_assert((std::is_same<decltype(std::asin((unsigned int)0)), double>::value), "");
170     static_assert((std::is_same<decltype(std::asin((long)0)), double>::value), "");
171     static_assert((std::is_same<decltype(std::asin((unsigned long)0)), double>::value), "");
172     static_assert((std::is_same<decltype(std::asin((long long)0)), double>::value), "");
173     static_assert((std::is_same<decltype(std::asin((unsigned long long)0)), double>::value), "");
174     static_assert((std::is_same<decltype(std::asin((double)0)), double>::value), "");
175     static_assert((std::is_same<decltype(std::asin((long double)0)), long double>::value), "");
176     static_assert((std::is_same<decltype(std::asinf(0)), float>::value), "");
177     static_assert((std::is_same<decltype(std::asinl(0)), long double>::value), "");
178     static_assert((std::is_same<decltype(asin(Ambiguous())), Ambiguous>::value), "");
179     assert(std::asin(0) == 0);
180 }
181 
182 void test_atan()
183 {
184     static_assert((std::is_same<decltype(std::atan((float)0)), float>::value), "");
185     static_assert((std::is_same<decltype(std::atan((bool)0)), double>::value), "");
186     static_assert((std::is_same<decltype(std::atan((unsigned short)0)), double>::value), "");
187     static_assert((std::is_same<decltype(std::atan((int)0)), double>::value), "");
188     static_assert((std::is_same<decltype(std::atan((unsigned int)0)), double>::value), "");
189     static_assert((std::is_same<decltype(std::atan((long)0)), double>::value), "");
190     static_assert((std::is_same<decltype(std::atan((unsigned long)0)), double>::value), "");
191     static_assert((std::is_same<decltype(std::atan((long long)0)), double>::value), "");
192     static_assert((std::is_same<decltype(std::atan((unsigned long long)0)), double>::value), "");
193     static_assert((std::is_same<decltype(std::atan((double)0)), double>::value), "");
194     static_assert((std::is_same<decltype(std::atan((long double)0)), long double>::value), "");
195     static_assert((std::is_same<decltype(std::atanf(0)), float>::value), "");
196     static_assert((std::is_same<decltype(std::atanl(0)), long double>::value), "");
197     static_assert((std::is_same<decltype(atan(Ambiguous())), Ambiguous>::value), "");
198     assert(std::atan(0) == 0);
199 }
200 
201 void test_atan2()
202 {
203     static_assert((std::is_same<decltype(std::atan2((float)0, (float)0)), float>::value), "");
204     static_assert((std::is_same<decltype(std::atan2((bool)0, (float)0)), double>::value), "");
205     static_assert((std::is_same<decltype(std::atan2((unsigned short)0, (double)0)), double>::value), "");
206     static_assert((std::is_same<decltype(std::atan2((int)0, (long double)0)), long double>::value), "");
207     static_assert((std::is_same<decltype(std::atan2((float)0, (unsigned int)0)), double>::value), "");
208     static_assert((std::is_same<decltype(std::atan2((double)0, (long)0)), double>::value), "");
209     static_assert((std::is_same<decltype(std::atan2((long double)0, (unsigned long)0)), long double>::value), "");
210     static_assert((std::is_same<decltype(std::atan2((int)0, (long long)0)), double>::value), "");
211     static_assert((std::is_same<decltype(std::atan2((int)0, (unsigned long long)0)), double>::value), "");
212     static_assert((std::is_same<decltype(std::atan2((double)0, (double)0)), double>::value), "");
213     static_assert((std::is_same<decltype(std::atan2((long double)0, (long double)0)), long double>::value), "");
214     static_assert((std::is_same<decltype(std::atan2((float)0, (double)0)), double>::value), "");
215     static_assert((std::is_same<decltype(std::atan2((float)0, (long double)0)), long double>::value), "");
216     static_assert((std::is_same<decltype(std::atan2((double)0, (long double)0)), long double>::value), "");
217     static_assert((std::is_same<decltype(std::atan2f(0,0)), float>::value), "");
218     static_assert((std::is_same<decltype(std::atan2l(0,0)), long double>::value), "");
219     static_assert((std::is_same<decltype(std::atan2((int)0, (int)0)), double>::value), "");
220     static_assert((std::is_same<decltype(atan2(Ambiguous(), Ambiguous())), Ambiguous>::value), "");
221     assert(std::atan2(0,1) == 0);
222 }
223 
224 void test_ceil()
225 {
226     static_assert((std::is_same<decltype(std::ceil((float)0)), float>::value), "");
227     static_assert((std::is_same<decltype(std::ceil((bool)0)), double>::value), "");
228     static_assert((std::is_same<decltype(std::ceil((unsigned short)0)), double>::value), "");
229     static_assert((std::is_same<decltype(std::ceil((int)0)), double>::value), "");
230     static_assert((std::is_same<decltype(std::ceil((unsigned int)0)), double>::value), "");
231     static_assert((std::is_same<decltype(std::ceil((long)0)), double>::value), "");
232     static_assert((std::is_same<decltype(std::ceil((unsigned long)0)), double>::value), "");
233     static_assert((std::is_same<decltype(std::ceil((long long)0)), double>::value), "");
234     static_assert((std::is_same<decltype(std::ceil((unsigned long long)0)), double>::value), "");
235     static_assert((std::is_same<decltype(std::ceil((double)0)), double>::value), "");
236     static_assert((std::is_same<decltype(std::ceil((long double)0)), long double>::value), "");
237     static_assert((std::is_same<decltype(std::ceilf(0)), float>::value), "");
238     static_assert((std::is_same<decltype(std::ceill(0)), long double>::value), "");
239     static_assert((std::is_same<decltype(ceil(Ambiguous())), Ambiguous>::value), "");
240     assert(std::ceil(0) == 0);
241 }
242 
243 void test_cos()
244 {
245     static_assert((std::is_same<decltype(std::cos((float)0)), float>::value), "");
246     static_assert((std::is_same<decltype(std::cos((bool)0)), double>::value), "");
247     static_assert((std::is_same<decltype(std::cos((unsigned short)0)), double>::value), "");
248     static_assert((std::is_same<decltype(std::cos((int)0)), double>::value), "");
249     static_assert((std::is_same<decltype(std::cos((unsigned int)0)), double>::value), "");
250     static_assert((std::is_same<decltype(std::cos((long)0)), double>::value), "");
251     static_assert((std::is_same<decltype(std::cos((unsigned long)0)), double>::value), "");
252     static_assert((std::is_same<decltype(std::cos((long long)0)), double>::value), "");
253     static_assert((std::is_same<decltype(std::cos((unsigned long long)0)), double>::value), "");
254     static_assert((std::is_same<decltype(std::cos((double)0)), double>::value), "");
255     static_assert((std::is_same<decltype(std::cos((long double)0)), long double>::value), "");
256     static_assert((std::is_same<decltype(std::cosf(0)), float>::value), "");
257     static_assert((std::is_same<decltype(std::cosl(0)), long double>::value), "");
258     static_assert((std::is_same<decltype(cos(Ambiguous())), Ambiguous>::value), "");
259     assert(std::cos(0) == 1);
260 }
261 
262 void test_cosh()
263 {
264     static_assert((std::is_same<decltype(std::cosh((float)0)), float>::value), "");
265     static_assert((std::is_same<decltype(std::cosh((bool)0)), double>::value), "");
266     static_assert((std::is_same<decltype(std::cosh((unsigned short)0)), double>::value), "");
267     static_assert((std::is_same<decltype(std::cosh((int)0)), double>::value), "");
268     static_assert((std::is_same<decltype(std::cosh((unsigned int)0)), double>::value), "");
269     static_assert((std::is_same<decltype(std::cosh((long)0)), double>::value), "");
270     static_assert((std::is_same<decltype(std::cosh((unsigned long)0)), double>::value), "");
271     static_assert((std::is_same<decltype(std::cosh((long long)0)), double>::value), "");
272     static_assert((std::is_same<decltype(std::cosh((unsigned long long)0)), double>::value), "");
273     static_assert((std::is_same<decltype(std::cosh((double)0)), double>::value), "");
274     static_assert((std::is_same<decltype(std::cosh((long double)0)), long double>::value), "");
275     static_assert((std::is_same<decltype(std::coshf(0)), float>::value), "");
276     static_assert((std::is_same<decltype(std::coshl(0)), long double>::value), "");
277     static_assert((std::is_same<decltype(cosh(Ambiguous())), Ambiguous>::value), "");
278     assert(std::cosh(0) == 1);
279 }
280 
281 void test_exp()
282 {
283     static_assert((std::is_same<decltype(std::exp((float)0)), float>::value), "");
284     static_assert((std::is_same<decltype(std::exp((bool)0)), double>::value), "");
285     static_assert((std::is_same<decltype(std::exp((unsigned short)0)), double>::value), "");
286     static_assert((std::is_same<decltype(std::exp((int)0)), double>::value), "");
287     static_assert((std::is_same<decltype(std::exp((unsigned int)0)), double>::value), "");
288     static_assert((std::is_same<decltype(std::exp((long)0)), double>::value), "");
289     static_assert((std::is_same<decltype(std::exp((unsigned long)0)), double>::value), "");
290     static_assert((std::is_same<decltype(std::exp((long long)0)), double>::value), "");
291     static_assert((std::is_same<decltype(std::exp((unsigned long long)0)), double>::value), "");
292     static_assert((std::is_same<decltype(std::exp((double)0)), double>::value), "");
293     static_assert((std::is_same<decltype(std::exp((long double)0)), long double>::value), "");
294     static_assert((std::is_same<decltype(std::expf(0)), float>::value), "");
295     static_assert((std::is_same<decltype(std::expl(0)), long double>::value), "");
296     static_assert((std::is_same<decltype(exp(Ambiguous())), Ambiguous>::value), "");
297     assert(std::exp(0) == 1);
298 }
299 
300 void test_fabs()
301 {
302     static_assert((std::is_same<decltype(std::fabs((float)0)), float>::value), "");
303     static_assert((std::is_same<decltype(std::fabs((bool)0)), double>::value), "");
304     static_assert((std::is_same<decltype(std::fabs((unsigned short)0)), double>::value), "");
305     static_assert((std::is_same<decltype(std::fabs((int)0)), double>::value), "");
306     static_assert((std::is_same<decltype(std::fabs((unsigned int)0)), double>::value), "");
307     static_assert((std::is_same<decltype(std::fabs((long)0)), double>::value), "");
308     static_assert((std::is_same<decltype(std::fabs((unsigned long)0)), double>::value), "");
309     static_assert((std::is_same<decltype(std::fabs((long long)0)), double>::value), "");
310     static_assert((std::is_same<decltype(std::fabs((unsigned long long)0)), double>::value), "");
311     static_assert((std::is_same<decltype(std::fabs((double)0)), double>::value), "");
312     static_assert((std::is_same<decltype(std::fabs((long double)0)), long double>::value), "");
313     static_assert((std::is_same<decltype(std::fabsf(0.0f)), float>::value), "");
314     static_assert((std::is_same<decltype(std::fabsl(0.0L)), long double>::value), "");
315     static_assert((std::is_same<decltype(fabs(Ambiguous())), Ambiguous>::value), "");
316     assert(std::fabs(-1) == 1);
317 }
318 
319 void test_floor()
320 {
321     static_assert((std::is_same<decltype(std::floor((float)0)), float>::value), "");
322     static_assert((std::is_same<decltype(std::floor((bool)0)), double>::value), "");
323     static_assert((std::is_same<decltype(std::floor((unsigned short)0)), double>::value), "");
324     static_assert((std::is_same<decltype(std::floor((int)0)), double>::value), "");
325     static_assert((std::is_same<decltype(std::floor((unsigned int)0)), double>::value), "");
326     static_assert((std::is_same<decltype(std::floor((long)0)), double>::value), "");
327     static_assert((std::is_same<decltype(std::floor((unsigned long)0)), double>::value), "");
328     static_assert((std::is_same<decltype(std::floor((long long)0)), double>::value), "");
329     static_assert((std::is_same<decltype(std::floor((unsigned long long)0)), double>::value), "");
330     static_assert((std::is_same<decltype(std::floor((double)0)), double>::value), "");
331     static_assert((std::is_same<decltype(std::floor((long double)0)), long double>::value), "");
332     static_assert((std::is_same<decltype(std::floorf(0)), float>::value), "");
333     static_assert((std::is_same<decltype(std::floorl(0)), long double>::value), "");
334     static_assert((std::is_same<decltype(floor(Ambiguous())), Ambiguous>::value), "");
335     assert(std::floor(1) == 1);
336 }
337 
338 void test_fmod()
339 {
340     static_assert((std::is_same<decltype(std::fmod((float)0, (float)0)), float>::value), "");
341     static_assert((std::is_same<decltype(std::fmod((bool)0, (float)0)), double>::value), "");
342     static_assert((std::is_same<decltype(std::fmod((unsigned short)0, (double)0)), double>::value), "");
343     static_assert((std::is_same<decltype(std::fmod((int)0, (long double)0)), long double>::value), "");
344     static_assert((std::is_same<decltype(std::fmod((float)0, (unsigned int)0)), double>::value), "");
345     static_assert((std::is_same<decltype(std::fmod((double)0, (long)0)), double>::value), "");
346     static_assert((std::is_same<decltype(std::fmod((long double)0, (unsigned long)0)), long double>::value), "");
347     static_assert((std::is_same<decltype(std::fmod((int)0, (long long)0)), double>::value), "");
348     static_assert((std::is_same<decltype(std::fmod((int)0, (unsigned long long)0)), double>::value), "");
349     static_assert((std::is_same<decltype(std::fmod((double)0, (double)0)), double>::value), "");
350     static_assert((std::is_same<decltype(std::fmod((long double)0, (long double)0)), long double>::value), "");
351     static_assert((std::is_same<decltype(std::fmod((float)0, (double)0)), double>::value), "");
352     static_assert((std::is_same<decltype(std::fmod((float)0, (long double)0)), long double>::value), "");
353     static_assert((std::is_same<decltype(std::fmod((double)0, (long double)0)), long double>::value), "");
354     static_assert((std::is_same<decltype(std::fmodf(0,0)), float>::value), "");
355     static_assert((std::is_same<decltype(std::fmodl(0,0)), long double>::value), "");
356     static_assert((std::is_same<decltype(std::fmod((int)0, (int)0)), double>::value), "");
357     static_assert((std::is_same<decltype(fmod(Ambiguous(), Ambiguous())), Ambiguous>::value), "");
358     assert(std::fmod(1.5,1) == .5);
359 }
360 
361 void test_frexp()
362 {
363     int ip;
364     static_assert((std::is_same<decltype(std::frexp((float)0, &ip)), float>::value), "");
365     static_assert((std::is_same<decltype(std::frexp((bool)0, &ip)), double>::value), "");
366     static_assert((std::is_same<decltype(std::frexp((unsigned short)0, &ip)), double>::value), "");
367     static_assert((std::is_same<decltype(std::frexp((int)0, &ip)), double>::value), "");
368     static_assert((std::is_same<decltype(std::frexp((unsigned int)0, &ip)), double>::value), "");
369     static_assert((std::is_same<decltype(std::frexp((long)0, &ip)), double>::value), "");
370     static_assert((std::is_same<decltype(std::frexp((unsigned long)0, &ip)), double>::value), "");
371     static_assert((std::is_same<decltype(std::frexp((long long)0, &ip)), double>::value), "");
372     static_assert((std::is_same<decltype(std::frexp((unsigned long long)0, &ip)), double>::value), "");
373     static_assert((std::is_same<decltype(std::frexp((double)0, &ip)), double>::value), "");
374     static_assert((std::is_same<decltype(std::frexp((long double)0, &ip)), long double>::value), "");
375     static_assert((std::is_same<decltype(std::frexpf(0, &ip)), float>::value), "");
376     static_assert((std::is_same<decltype(std::frexpl(0, &ip)), long double>::value), "");
377     static_assert((std::is_same<decltype(frexp(Ambiguous(), &ip)), Ambiguous>::value), "");
378     assert(std::frexp(0, &ip) == 0);
379 }
380 
381 void test_ldexp()
382 {
383     int ip = 1;
384     static_assert((std::is_same<decltype(std::ldexp((float)0, ip)), float>::value), "");
385     static_assert((std::is_same<decltype(std::ldexp((bool)0, ip)), double>::value), "");
386     static_assert((std::is_same<decltype(std::ldexp((unsigned short)0, ip)), double>::value), "");
387     static_assert((std::is_same<decltype(std::ldexp((int)0, ip)), double>::value), "");
388     static_assert((std::is_same<decltype(std::ldexp((unsigned int)0, ip)), double>::value), "");
389     static_assert((std::is_same<decltype(std::ldexp((long)0, ip)), double>::value), "");
390     static_assert((std::is_same<decltype(std::ldexp((unsigned long)0, ip)), double>::value), "");
391     static_assert((std::is_same<decltype(std::ldexp((long long)0, ip)), double>::value), "");
392     static_assert((std::is_same<decltype(std::ldexp((unsigned long long)0, ip)), double>::value), "");
393     static_assert((std::is_same<decltype(std::ldexp((double)0, ip)), double>::value), "");
394     static_assert((std::is_same<decltype(std::ldexp((long double)0, ip)), long double>::value), "");
395     static_assert((std::is_same<decltype(std::ldexpf(0, ip)), float>::value), "");
396     static_assert((std::is_same<decltype(std::ldexpl(0, ip)), long double>::value), "");
397     static_assert((std::is_same<decltype(ldexp(Ambiguous(), ip)), Ambiguous>::value), "");
398     assert(std::ldexp(1, ip) == 2);
399 }
400 
401 void test_log()
402 {
403     static_assert((std::is_same<decltype(std::log((float)0)), float>::value), "");
404     static_assert((std::is_same<decltype(std::log((bool)0)), double>::value), "");
405     static_assert((std::is_same<decltype(std::log((unsigned short)0)), double>::value), "");
406     static_assert((std::is_same<decltype(std::log((int)0)), double>::value), "");
407     static_assert((std::is_same<decltype(std::log((unsigned int)0)), double>::value), "");
408     static_assert((std::is_same<decltype(std::log((long)0)), double>::value), "");
409     static_assert((std::is_same<decltype(std::log((unsigned long)0)), double>::value), "");
410     static_assert((std::is_same<decltype(std::log((long long)0)), double>::value), "");
411     static_assert((std::is_same<decltype(std::log((unsigned long long)0)), double>::value), "");
412     static_assert((std::is_same<decltype(std::log((double)0)), double>::value), "");
413     static_assert((std::is_same<decltype(std::log((long double)0)), long double>::value), "");
414     static_assert((std::is_same<decltype(std::logf(0)), float>::value), "");
415     static_assert((std::is_same<decltype(std::logl(0)), long double>::value), "");
416     static_assert((std::is_same<decltype(log(Ambiguous())), Ambiguous>::value), "");
417     assert(std::log(1) == 0);
418 }
419 
420 void test_log10()
421 {
422     static_assert((std::is_same<decltype(std::log10((float)0)), float>::value), "");
423     static_assert((std::is_same<decltype(std::log10((bool)0)), double>::value), "");
424     static_assert((std::is_same<decltype(std::log10((unsigned short)0)), double>::value), "");
425     static_assert((std::is_same<decltype(std::log10((int)0)), double>::value), "");
426     static_assert((std::is_same<decltype(std::log10((unsigned int)0)), double>::value), "");
427     static_assert((std::is_same<decltype(std::log10((long)0)), double>::value), "");
428     static_assert((std::is_same<decltype(std::log10((unsigned long)0)), double>::value), "");
429     static_assert((std::is_same<decltype(std::log10((long long)0)), double>::value), "");
430     static_assert((std::is_same<decltype(std::log10((unsigned long long)0)), double>::value), "");
431     static_assert((std::is_same<decltype(std::log10((double)0)), double>::value), "");
432     static_assert((std::is_same<decltype(std::log10((long double)0)), long double>::value), "");
433     static_assert((std::is_same<decltype(std::log10f(0)), float>::value), "");
434     static_assert((std::is_same<decltype(std::log10l(0)), long double>::value), "");
435     static_assert((std::is_same<decltype(log10(Ambiguous())), Ambiguous>::value), "");
436     assert(std::log10(1) == 0);
437 }
438 
439 void test_modf()
440 {
441     static_assert((std::is_same<decltype(std::modf((float)0, (float*)0)), float>::value), "");
442     static_assert((std::is_same<decltype(std::modf((double)0, (double*)0)), double>::value), "");
443     static_assert((std::is_same<decltype(std::modf((long double)0, (long double*)0)), long double>::value), "");
444     static_assert((std::is_same<decltype(std::modff(0, (float*)0)), float>::value), "");
445     static_assert((std::is_same<decltype(std::modfl(0, (long double*)0)), long double>::value), "");
446     static_assert((std::is_same<decltype(modf(Ambiguous(), (Ambiguous*)0)), Ambiguous>::value), "");
447     double i;
448     assert(std::modf(1., &i) == 0);
449 }
450 
451 void test_pow()
452 {
453     static_assert((std::is_same<decltype(std::pow((float)0, (float)0)), float>::value), "");
454     static_assert((std::is_same<decltype(std::pow((bool)0, (float)0)), double>::value), "");
455     static_assert((std::is_same<decltype(std::pow((unsigned short)0, (double)0)), double>::value), "");
456     static_assert((std::is_same<decltype(std::pow((int)0, (long double)0)), long double>::value), "");
457     static_assert((std::is_same<decltype(std::pow((float)0, (unsigned int)0)), double>::value), "");
458     static_assert((std::is_same<decltype(std::pow((double)0, (long)0)), double>::value), "");
459     static_assert((std::is_same<decltype(std::pow((long double)0, (unsigned long)0)), long double>::value), "");
460     static_assert((std::is_same<decltype(std::pow((int)0, (long long)0)), double>::value), "");
461     static_assert((std::is_same<decltype(std::pow((int)0, (unsigned long long)0)), double>::value), "");
462     static_assert((std::is_same<decltype(std::pow((double)0, (double)0)), double>::value), "");
463     static_assert((std::is_same<decltype(std::pow((long double)0, (long double)0)), long double>::value), "");
464     static_assert((std::is_same<decltype(std::pow((float)0, (double)0)), double>::value), "");
465     static_assert((std::is_same<decltype(std::pow((float)0, (long double)0)), long double>::value), "");
466     static_assert((std::is_same<decltype(std::pow((double)0, (long double)0)), long double>::value), "");
467     static_assert((std::is_same<decltype(std::powf(0,0)), float>::value), "");
468     static_assert((std::is_same<decltype(std::powl(0,0)), long double>::value), "");
469     static_assert((std::is_same<decltype(std::pow((int)0, (int)0)), double>::value), "");
470 //     static_assert((std::is_same<decltype(std::pow(Value<int>(), (int)0)), double>::value), "");
471 //     static_assert((std::is_same<decltype(std::pow(Value<long double>(), (float)0)), long double>::value), "");
472 //     static_assert((std::is_same<decltype(std::pow((float) 0, Value<float>())), float>::value), "");
473     static_assert((std::is_same<decltype(pow(Ambiguous(), Ambiguous())), Ambiguous>::value), "");
474     assert(std::pow(1,1) == 1);
475 //     assert(std::pow(Value<int,1>(), Value<float,1>())  == 1);
476 //     assert(std::pow(1.0f, Value<double,1>()) == 1);
477 //     assert(std::pow(1.0, Value<int,1>()) == 1);
478 //     assert(std::pow(Value<long double,1>(), 1LL) == 1);
479 }
480 
481 void test_sin()
482 {
483     static_assert((std::is_same<decltype(std::sin((float)0)), float>::value), "");
484     static_assert((std::is_same<decltype(std::sin((bool)0)), double>::value), "");
485     static_assert((std::is_same<decltype(std::sin((unsigned short)0)), double>::value), "");
486     static_assert((std::is_same<decltype(std::sin((int)0)), double>::value), "");
487     static_assert((std::is_same<decltype(std::sin((unsigned int)0)), double>::value), "");
488     static_assert((std::is_same<decltype(std::sin((long)0)), double>::value), "");
489     static_assert((std::is_same<decltype(std::sin((unsigned long)0)), double>::value), "");
490     static_assert((std::is_same<decltype(std::sin((long long)0)), double>::value), "");
491     static_assert((std::is_same<decltype(std::sin((unsigned long long)0)), double>::value), "");
492     static_assert((std::is_same<decltype(std::sin((double)0)), double>::value), "");
493     static_assert((std::is_same<decltype(std::sin((long double)0)), long double>::value), "");
494     static_assert((std::is_same<decltype(std::sinf(0)), float>::value), "");
495     static_assert((std::is_same<decltype(std::sinl(0)), long double>::value), "");
496     static_assert((std::is_same<decltype(sin(Ambiguous())), Ambiguous>::value), "");
497     assert(std::sin(0) == 0);
498 }
499 
500 void test_sinh()
501 {
502     static_assert((std::is_same<decltype(std::sinh((float)0)), float>::value), "");
503     static_assert((std::is_same<decltype(std::sinh((bool)0)), double>::value), "");
504     static_assert((std::is_same<decltype(std::sinh((unsigned short)0)), double>::value), "");
505     static_assert((std::is_same<decltype(std::sinh((int)0)), double>::value), "");
506     static_assert((std::is_same<decltype(std::sinh((unsigned int)0)), double>::value), "");
507     static_assert((std::is_same<decltype(std::sinh((long)0)), double>::value), "");
508     static_assert((std::is_same<decltype(std::sinh((unsigned long)0)), double>::value), "");
509     static_assert((std::is_same<decltype(std::sinh((long long)0)), double>::value), "");
510     static_assert((std::is_same<decltype(std::sinh((unsigned long long)0)), double>::value), "");
511     static_assert((std::is_same<decltype(std::sinh((double)0)), double>::value), "");
512     static_assert((std::is_same<decltype(std::sinh((long double)0)), long double>::value), "");
513     static_assert((std::is_same<decltype(std::sinhf(0)), float>::value), "");
514     static_assert((std::is_same<decltype(std::sinhl(0)), long double>::value), "");
515     static_assert((std::is_same<decltype(sinh(Ambiguous())), Ambiguous>::value), "");
516     assert(std::sinh(0) == 0);
517 }
518 
519 void test_sqrt()
520 {
521     static_assert((std::is_same<decltype(std::sqrt((float)0)), float>::value), "");
522     static_assert((std::is_same<decltype(std::sqrt((bool)0)), double>::value), "");
523     static_assert((std::is_same<decltype(std::sqrt((unsigned short)0)), double>::value), "");
524     static_assert((std::is_same<decltype(std::sqrt((int)0)), double>::value), "");
525     static_assert((std::is_same<decltype(std::sqrt((unsigned int)0)), double>::value), "");
526     static_assert((std::is_same<decltype(std::sqrt((long)0)), double>::value), "");
527     static_assert((std::is_same<decltype(std::sqrt((unsigned long)0)), double>::value), "");
528     static_assert((std::is_same<decltype(std::sqrt((long long)0)), double>::value), "");
529     static_assert((std::is_same<decltype(std::sqrt((unsigned long long)0)), double>::value), "");
530     static_assert((std::is_same<decltype(std::sqrt((double)0)), double>::value), "");
531     static_assert((std::is_same<decltype(std::sqrt((long double)0)), long double>::value), "");
532     static_assert((std::is_same<decltype(std::sqrtf(0)), float>::value), "");
533     static_assert((std::is_same<decltype(std::sqrtl(0)), long double>::value), "");
534     static_assert((std::is_same<decltype(sqrt(Ambiguous())), Ambiguous>::value), "");
535     assert(std::sqrt(4) == 2);
536 }
537 
538 void test_tan()
539 {
540     static_assert((std::is_same<decltype(std::tan((float)0)), float>::value), "");
541     static_assert((std::is_same<decltype(std::tan((bool)0)), double>::value), "");
542     static_assert((std::is_same<decltype(std::tan((unsigned short)0)), double>::value), "");
543     static_assert((std::is_same<decltype(std::tan((int)0)), double>::value), "");
544     static_assert((std::is_same<decltype(std::tan((unsigned int)0)), double>::value), "");
545     static_assert((std::is_same<decltype(std::tan((long)0)), double>::value), "");
546     static_assert((std::is_same<decltype(std::tan((unsigned long)0)), double>::value), "");
547     static_assert((std::is_same<decltype(std::tan((long long)0)), double>::value), "");
548     static_assert((std::is_same<decltype(std::tan((unsigned long long)0)), double>::value), "");
549     static_assert((std::is_same<decltype(std::tan((double)0)), double>::value), "");
550     static_assert((std::is_same<decltype(std::tan((long double)0)), long double>::value), "");
551     static_assert((std::is_same<decltype(std::tanf(0)), float>::value), "");
552     static_assert((std::is_same<decltype(std::tanl(0)), long double>::value), "");
553     static_assert((std::is_same<decltype(tan(Ambiguous())), Ambiguous>::value), "");
554     assert(std::tan(0) == 0);
555 }
556 
557 void test_tanh()
558 {
559     static_assert((std::is_same<decltype(std::tanh((float)0)), float>::value), "");
560     static_assert((std::is_same<decltype(std::tanh((bool)0)), double>::value), "");
561     static_assert((std::is_same<decltype(std::tanh((unsigned short)0)), double>::value), "");
562     static_assert((std::is_same<decltype(std::tanh((int)0)), double>::value), "");
563     static_assert((std::is_same<decltype(std::tanh((unsigned int)0)), double>::value), "");
564     static_assert((std::is_same<decltype(std::tanh((long)0)), double>::value), "");
565     static_assert((std::is_same<decltype(std::tanh((unsigned long)0)), double>::value), "");
566     static_assert((std::is_same<decltype(std::tanh((long long)0)), double>::value), "");
567     static_assert((std::is_same<decltype(std::tanh((unsigned long long)0)), double>::value), "");
568     static_assert((std::is_same<decltype(std::tanh((double)0)), double>::value), "");
569     static_assert((std::is_same<decltype(std::tanh((long double)0)), long double>::value), "");
570     static_assert((std::is_same<decltype(std::tanhf(0)), float>::value), "");
571     static_assert((std::is_same<decltype(std::tanhl(0)), long double>::value), "");
572     static_assert((std::is_same<decltype(tanh(Ambiguous())), Ambiguous>::value), "");
573     assert(std::tanh(0) == 0);
574 }
575 
576 void test_signbit()
577 {
578 #ifdef signbit
579 #error signbit defined
580 #endif
581     static_assert((std::is_same<decltype(std::signbit((float)0)), bool>::value), "");
582     static_assert((std::is_same<decltype(std::signbit((double)0)), bool>::value), "");
583     static_assert((std::is_same<decltype(std::signbit(0)), bool>::value), "");
584     static_assert((std::is_same<decltype(std::signbit((long double)0)), bool>::value), "");
585     static_assert((std::is_same<decltype(signbit(Ambiguous())), Ambiguous>::value), "");
586     assert(std::signbit(-1.0) == true);
587     assert(std::signbit(0u) == false);
588     assert(std::signbit(std::numeric_limits<unsigned>::max()) == false);
589     assert(std::signbit(0) == false);
590     assert(std::signbit(1) == false);
591     assert(std::signbit(-1) == true);
592     assert(std::signbit(std::numeric_limits<int>::max()) == false);
593     assert(std::signbit(std::numeric_limits<int>::min()) == true);
594 }
595 
596 void test_fpclassify()
597 {
598 #ifdef fpclassify
599 #error fpclassify defined
600 #endif
601     static_assert((std::is_same<decltype(std::fpclassify((float)0)), int>::value), "");
602     static_assert((std::is_same<decltype(std::fpclassify((double)0)), int>::value), "");
603     static_assert((std::is_same<decltype(std::fpclassify(0)), int>::value), "");
604     static_assert((std::is_same<decltype(std::fpclassify((long double)0)), int>::value), "");
605     static_assert((std::is_same<decltype(fpclassify(Ambiguous())), Ambiguous>::value), "");
606     assert(std::fpclassify(-1.0) == FP_NORMAL);
607     assert(std::fpclassify(0) == FP_ZERO);
608     assert(std::fpclassify(1) == FP_NORMAL);
609     assert(std::fpclassify(-1) == FP_NORMAL);
610     assert(std::fpclassify(std::numeric_limits<int>::max()) == FP_NORMAL);
611     assert(std::fpclassify(std::numeric_limits<int>::min()) == FP_NORMAL);
612 }
613 
614 void test_isfinite()
615 {
616 #ifdef isfinite
617 #error isfinite defined
618 #endif
619     static_assert((std::is_same<decltype(std::isfinite((float)0)), bool>::value), "");
620     static_assert((std::is_same<decltype(std::isfinite((double)0)), bool>::value), "");
621     static_assert((std::is_same<decltype(std::isfinite(0)), bool>::value), "");
622     static_assert((std::is_same<decltype(std::isfinite((long double)0)), bool>::value), "");
623     static_assert((std::is_same<decltype(isfinite(Ambiguous())), Ambiguous>::value), "");
624     assert(std::isfinite(-1.0) == true);
625     assert(std::isfinite(0) == true);
626     assert(std::isfinite(1) == true);
627     assert(std::isfinite(-1) == true);
628     assert(std::isfinite(std::numeric_limits<int>::max()) == true);
629     assert(std::isfinite(std::numeric_limits<int>::min()) == true);
630 }
631 
632 void test_isnormal()
633 {
634 #ifdef isnormal
635 #error isnormal defined
636 #endif
637     static_assert((std::is_same<decltype(std::isnormal((float)0)), bool>::value), "");
638     static_assert((std::is_same<decltype(std::isnormal((double)0)), bool>::value), "");
639     static_assert((std::is_same<decltype(std::isnormal(0)), bool>::value), "");
640     static_assert((std::is_same<decltype(std::isnormal((long double)0)), bool>::value), "");
641     static_assert((std::is_same<decltype(isnormal(Ambiguous())), Ambiguous>::value), "");
642     assert(std::isnormal(-1.0) == true);
643     assert(std::isnormal(0) == false);
644     assert(std::isnormal(1) == true);
645     assert(std::isnormal(-1) == true);
646     assert(std::isnormal(std::numeric_limits<int>::max()) == true);
647     assert(std::isnormal(std::numeric_limits<int>::min()) == true);
648 }
649 
650 void test_isgreater()
651 {
652 #ifdef isgreater
653 #error isgreater defined
654 #endif
655     static_assert((std::is_same<decltype(std::isgreater((float)0, (float)0)), bool>::value), "");
656     static_assert((std::is_same<decltype(std::isgreater((float)0, (double)0)), bool>::value), "");
657     static_assert((std::is_same<decltype(std::isgreater((float)0, (long double)0)), bool>::value), "");
658     static_assert((std::is_same<decltype(std::isgreater((double)0, (float)0)), bool>::value), "");
659     static_assert((std::is_same<decltype(std::isgreater((double)0, (double)0)), bool>::value), "");
660     static_assert((std::is_same<decltype(std::isgreater(0, (double)0)), bool>::value), "");
661     static_assert((std::is_same<decltype(std::isgreater((double)0, (long double)0)), bool>::value), "");
662     static_assert((std::is_same<decltype(std::isgreater((long double)0, (float)0)), bool>::value), "");
663     static_assert((std::is_same<decltype(std::isgreater((long double)0, (double)0)), bool>::value), "");
664     static_assert((std::is_same<decltype(std::isgreater((long double)0, (long double)0)), bool>::value), "");
665     static_assert((std::is_same<decltype(isgreater(Ambiguous(), Ambiguous())), Ambiguous>::value), "");
666     assert(std::isgreater(-1.0, 0.F) == false);
667 }
668 
669 void test_isgreaterequal()
670 {
671 #ifdef isgreaterequal
672 #error isgreaterequal defined
673 #endif
674     static_assert((std::is_same<decltype(std::isgreaterequal((float)0, (float)0)), bool>::value), "");
675     static_assert((std::is_same<decltype(std::isgreaterequal((float)0, (double)0)), bool>::value), "");
676     static_assert((std::is_same<decltype(std::isgreaterequal((float)0, (long double)0)), bool>::value), "");
677     static_assert((std::is_same<decltype(std::isgreaterequal((double)0, (float)0)), bool>::value), "");
678     static_assert((std::is_same<decltype(std::isgreaterequal((double)0, (double)0)), bool>::value), "");
679     static_assert((std::is_same<decltype(std::isgreaterequal(0, (double)0)), bool>::value), "");
680     static_assert((std::is_same<decltype(std::isgreaterequal((double)0, (long double)0)), bool>::value), "");
681     static_assert((std::is_same<decltype(std::isgreaterequal((long double)0, (float)0)), bool>::value), "");
682     static_assert((std::is_same<decltype(std::isgreaterequal((long double)0, (double)0)), bool>::value), "");
683     static_assert((std::is_same<decltype(std::isgreaterequal((long double)0, (long double)0)), bool>::value), "");
684     static_assert((std::is_same<decltype(isgreaterequal(Ambiguous(), Ambiguous())), Ambiguous>::value), "");
685     assert(std::isgreaterequal(-1.0, 0.F) == false);
686 }
687 
688 void test_isinf()
689 {
690 #ifdef isinf
691 #error isinf defined
692 #endif
693     static_assert((std::is_same<decltype(std::isinf((float)0)), bool>::value), "");
694 
695     typedef decltype(std::isinf((double)0)) DoubleRetType;
696 #if !defined(__linux__) || defined(__clang__)
697     static_assert((std::is_same<DoubleRetType, bool>::value), "");
698 #else
699     // GLIBC < 2.23 defines 'isinf(double)' with a return type of 'int' in
700     // all C++ dialects. The test should tolerate this when libc++ can't work
701     // around it.
702     // See: https://sourceware.org/bugzilla/show_bug.cgi?id=19439
703     static_assert((std::is_same<DoubleRetType, bool>::value
704                 || std::is_same<DoubleRetType, int>::value), "");
705 #endif
706 
707     static_assert((std::is_same<decltype(std::isinf(0)), bool>::value), "");
708     static_assert((std::is_same<decltype(std::isinf((long double)0)), bool>::value), "");
709     assert(std::isinf(-1.0) == false);
710     assert(std::isinf(0) == false);
711     assert(std::isinf(1) == false);
712     assert(std::isinf(-1) == false);
713     assert(std::isinf(std::numeric_limits<int>::max()) == false);
714     assert(std::isinf(std::numeric_limits<int>::min()) == false);
715 }
716 
717 void test_isless()
718 {
719 #ifdef isless
720 #error isless defined
721 #endif
722     static_assert((std::is_same<decltype(std::isless((float)0, (float)0)), bool>::value), "");
723     static_assert((std::is_same<decltype(std::isless((float)0, (double)0)), bool>::value), "");
724     static_assert((std::is_same<decltype(std::isless((float)0, (long double)0)), bool>::value), "");
725     static_assert((std::is_same<decltype(std::isless((double)0, (float)0)), bool>::value), "");
726     static_assert((std::is_same<decltype(std::isless((double)0, (double)0)), bool>::value), "");
727     static_assert((std::is_same<decltype(std::isless(0, (double)0)), bool>::value), "");
728     static_assert((std::is_same<decltype(std::isless((double)0, (long double)0)), bool>::value), "");
729     static_assert((std::is_same<decltype(std::isless((long double)0, (float)0)), bool>::value), "");
730     static_assert((std::is_same<decltype(std::isless((long double)0, (double)0)), bool>::value), "");
731     static_assert((std::is_same<decltype(std::isless((long double)0, (long double)0)), bool>::value), "");
732     static_assert((std::is_same<decltype(isless(Ambiguous(), Ambiguous())), Ambiguous>::value), "");
733     assert(std::isless(-1.0, 0.F) == true);
734 }
735 
736 void test_islessequal()
737 {
738 #ifdef islessequal
739 #error islessequal defined
740 #endif
741     static_assert((std::is_same<decltype(std::islessequal((float)0, (float)0)), bool>::value), "");
742     static_assert((std::is_same<decltype(std::islessequal((float)0, (double)0)), bool>::value), "");
743     static_assert((std::is_same<decltype(std::islessequal((float)0, (long double)0)), bool>::value), "");
744     static_assert((std::is_same<decltype(std::islessequal((double)0, (float)0)), bool>::value), "");
745     static_assert((std::is_same<decltype(std::islessequal((double)0, (double)0)), bool>::value), "");
746     static_assert((std::is_same<decltype(std::islessequal(0, (double)0)), bool>::value), "");
747     static_assert((std::is_same<decltype(std::islessequal((double)0, (long double)0)), bool>::value), "");
748     static_assert((std::is_same<decltype(std::islessequal((long double)0, (float)0)), bool>::value), "");
749     static_assert((std::is_same<decltype(std::islessequal((long double)0, (double)0)), bool>::value), "");
750     static_assert((std::is_same<decltype(std::islessequal((long double)0, (long double)0)), bool>::value), "");
751     static_assert((std::is_same<decltype(islessequal(Ambiguous(), Ambiguous())), Ambiguous>::value), "");
752     assert(std::islessequal(-1.0, 0.F) == true);
753 }
754 
755 void test_islessgreater()
756 {
757 #ifdef islessgreater
758 #error islessgreater defined
759 #endif
760     static_assert((std::is_same<decltype(std::islessgreater((float)0, (float)0)), bool>::value), "");
761     static_assert((std::is_same<decltype(std::islessgreater((float)0, (double)0)), bool>::value), "");
762     static_assert((std::is_same<decltype(std::islessgreater((float)0, (long double)0)), bool>::value), "");
763     static_assert((std::is_same<decltype(std::islessgreater((double)0, (float)0)), bool>::value), "");
764     static_assert((std::is_same<decltype(std::islessgreater((double)0, (double)0)), bool>::value), "");
765     static_assert((std::is_same<decltype(std::islessgreater(0, (double)0)), bool>::value), "");
766     static_assert((std::is_same<decltype(std::islessgreater((double)0, (long double)0)), bool>::value), "");
767     static_assert((std::is_same<decltype(std::islessgreater((long double)0, (float)0)), bool>::value), "");
768     static_assert((std::is_same<decltype(std::islessgreater((long double)0, (double)0)), bool>::value), "");
769     static_assert((std::is_same<decltype(std::islessgreater((long double)0, (long double)0)), bool>::value), "");
770     static_assert((std::is_same<decltype(islessgreater(Ambiguous(), Ambiguous())), Ambiguous>::value), "");
771     assert(std::islessgreater(-1.0, 0.F) == true);
772 }
773 
774 void test_isnan()
775 {
776 #ifdef isnan
777 #error isnan defined
778 #endif
779     static_assert((std::is_same<decltype(std::isnan((float)0)), bool>::value), "");
780 
781     typedef decltype(std::isnan((double)0)) DoubleRetType;
782 #if !defined(__linux__) || defined(__clang__)
783     static_assert((std::is_same<DoubleRetType, bool>::value), "");
784 #else
785     // GLIBC < 2.23 defines 'isinf(double)' with a return type of 'int' in
786     // all C++ dialects. The test should tolerate this when libc++ can't work
787     // around it.
788     // See: https://sourceware.org/bugzilla/show_bug.cgi?id=19439
789     static_assert((std::is_same<DoubleRetType, bool>::value
790                 || std::is_same<DoubleRetType, int>::value), "");
791 #endif
792 
793     static_assert((std::is_same<decltype(std::isnan(0)), bool>::value), "");
794     static_assert((std::is_same<decltype(std::isnan((long double)0)), bool>::value), "");
795     assert(std::isnan(-1.0) == false);
796     assert(std::isnan(0) == false);
797     assert(std::isnan(1) == false);
798     assert(std::isnan(-1) == false);
799     assert(std::isnan(std::numeric_limits<int>::max()) == false);
800     assert(std::isnan(std::numeric_limits<int>::min()) == false);
801 }
802 
803 void test_isunordered()
804 {
805 #ifdef isunordered
806 #error isunordered defined
807 #endif
808     static_assert((std::is_same<decltype(std::isunordered((float)0, (float)0)), bool>::value), "");
809     static_assert((std::is_same<decltype(std::isunordered((float)0, (double)0)), bool>::value), "");
810     static_assert((std::is_same<decltype(std::isunordered((float)0, (long double)0)), bool>::value), "");
811     static_assert((std::is_same<decltype(std::isunordered((double)0, (float)0)), bool>::value), "");
812     static_assert((std::is_same<decltype(std::isunordered((double)0, (double)0)), bool>::value), "");
813     static_assert((std::is_same<decltype(std::isunordered(0, (double)0)), bool>::value), "");
814     static_assert((std::is_same<decltype(std::isunordered((double)0, (long double)0)), bool>::value), "");
815     static_assert((std::is_same<decltype(std::isunordered((long double)0, (float)0)), bool>::value), "");
816     static_assert((std::is_same<decltype(std::isunordered((long double)0, (double)0)), bool>::value), "");
817     static_assert((std::is_same<decltype(std::isunordered((long double)0, (long double)0)), bool>::value), "");
818     static_assert((std::is_same<decltype(isunordered(Ambiguous(), Ambiguous())), Ambiguous>::value), "");
819     assert(std::isunordered(-1.0, 0.F) == false);
820 }
821 
822 void test_acosh()
823 {
824     static_assert((std::is_same<decltype(std::acosh((float)0)), float>::value), "");
825     static_assert((std::is_same<decltype(std::acosh((bool)0)), double>::value), "");
826     static_assert((std::is_same<decltype(std::acosh((unsigned short)0)), double>::value), "");
827     static_assert((std::is_same<decltype(std::acosh((int)0)), double>::value), "");
828     static_assert((std::is_same<decltype(std::acosh((unsigned int)0)), double>::value), "");
829     static_assert((std::is_same<decltype(std::acosh((long)0)), double>::value), "");
830     static_assert((std::is_same<decltype(std::acosh((unsigned long)0)), double>::value), "");
831     static_assert((std::is_same<decltype(std::acosh((long long)0)), double>::value), "");
832     static_assert((std::is_same<decltype(std::acosh((unsigned long long)0)), double>::value), "");
833     static_assert((std::is_same<decltype(std::acosh((double)0)), double>::value), "");
834     static_assert((std::is_same<decltype(std::acosh((long double)0)), long double>::value), "");
835     static_assert((std::is_same<decltype(std::acoshf(0)), float>::value), "");
836     static_assert((std::is_same<decltype(std::acoshl(0)), long double>::value), "");
837     static_assert((std::is_same<decltype(acosh(Ambiguous())), Ambiguous>::value), "");
838     assert(std::acosh(1) == 0);
839 }
840 
841 void test_asinh()
842 {
843     static_assert((std::is_same<decltype(std::asinh((float)0)), float>::value), "");
844     static_assert((std::is_same<decltype(std::asinh((bool)0)), double>::value), "");
845     static_assert((std::is_same<decltype(std::asinh((unsigned short)0)), double>::value), "");
846     static_assert((std::is_same<decltype(std::asinh((int)0)), double>::value), "");
847     static_assert((std::is_same<decltype(std::asinh((unsigned int)0)), double>::value), "");
848     static_assert((std::is_same<decltype(std::asinh((long)0)), double>::value), "");
849     static_assert((std::is_same<decltype(std::asinh((unsigned long)0)), double>::value), "");
850     static_assert((std::is_same<decltype(std::asinh((long long)0)), double>::value), "");
851     static_assert((std::is_same<decltype(std::asinh((unsigned long long)0)), double>::value), "");
852     static_assert((std::is_same<decltype(std::asinh((double)0)), double>::value), "");
853     static_assert((std::is_same<decltype(std::asinh((long double)0)), long double>::value), "");
854     static_assert((std::is_same<decltype(std::asinhf(0)), float>::value), "");
855     static_assert((std::is_same<decltype(std::asinhl(0)), long double>::value), "");
856     static_assert((std::is_same<decltype(asinh(Ambiguous())), Ambiguous>::value), "");
857     assert(std::asinh(0) == 0);
858 }
859 
860 void test_atanh()
861 {
862     static_assert((std::is_same<decltype(std::atanh((float)0)), float>::value), "");
863     static_assert((std::is_same<decltype(std::atanh((bool)0)), double>::value), "");
864     static_assert((std::is_same<decltype(std::atanh((unsigned short)0)), double>::value), "");
865     static_assert((std::is_same<decltype(std::atanh((int)0)), double>::value), "");
866     static_assert((std::is_same<decltype(std::atanh((unsigned int)0)), double>::value), "");
867     static_assert((std::is_same<decltype(std::atanh((long)0)), double>::value), "");
868     static_assert((std::is_same<decltype(std::atanh((unsigned long)0)), double>::value), "");
869     static_assert((std::is_same<decltype(std::atanh((long long)0)), double>::value), "");
870     static_assert((std::is_same<decltype(std::atanh((unsigned long long)0)), double>::value), "");
871     static_assert((std::is_same<decltype(std::atanh((double)0)), double>::value), "");
872     static_assert((std::is_same<decltype(std::atanh((long double)0)), long double>::value), "");
873     static_assert((std::is_same<decltype(std::atanhf(0)), float>::value), "");
874     static_assert((std::is_same<decltype(std::atanhl(0)), long double>::value), "");
875     static_assert((std::is_same<decltype(atanh(Ambiguous())), Ambiguous>::value), "");
876     assert(std::atanh(0) == 0);
877 }
878 
879 void test_cbrt()
880 {
881     static_assert((std::is_same<decltype(std::cbrt((float)0)), float>::value), "");
882     static_assert((std::is_same<decltype(std::cbrt((bool)0)), double>::value), "");
883     static_assert((std::is_same<decltype(std::cbrt((unsigned short)0)), double>::value), "");
884     static_assert((std::is_same<decltype(std::cbrt((int)0)), double>::value), "");
885     static_assert((std::is_same<decltype(std::cbrt((unsigned int)0)), double>::value), "");
886     static_assert((std::is_same<decltype(std::cbrt((long)0)), double>::value), "");
887     static_assert((std::is_same<decltype(std::cbrt((unsigned long)0)), double>::value), "");
888     static_assert((std::is_same<decltype(std::cbrt((long long)0)), double>::value), "");
889     static_assert((std::is_same<decltype(std::cbrt((unsigned long long)0)), double>::value), "");
890     static_assert((std::is_same<decltype(std::cbrt((double)0)), double>::value), "");
891     static_assert((std::is_same<decltype(std::cbrt((long double)0)), long double>::value), "");
892     static_assert((std::is_same<decltype(std::cbrtf(0)), float>::value), "");
893     static_assert((std::is_same<decltype(std::cbrtl(0)), long double>::value), "");
894     static_assert((std::is_same<decltype(cbrt(Ambiguous())), Ambiguous>::value), "");
895     assert(truncate_fp(std::cbrt(1)) == 1);
896 }
897 
898 void test_copysign()
899 {
900     static_assert((std::is_same<decltype(std::copysign((float)0, (float)0)), float>::value), "");
901     static_assert((std::is_same<decltype(std::copysign((bool)0, (float)0)), double>::value), "");
902     static_assert((std::is_same<decltype(std::copysign((unsigned short)0, (double)0)), double>::value), "");
903     static_assert((std::is_same<decltype(std::copysign((int)0, (long double)0)), long double>::value), "");
904     static_assert((std::is_same<decltype(std::copysign((float)0, (unsigned int)0)), double>::value), "");
905     static_assert((std::is_same<decltype(std::copysign((double)0, (long)0)), double>::value), "");
906     static_assert((std::is_same<decltype(std::copysign((long double)0, (unsigned long)0)), long double>::value), "");
907     static_assert((std::is_same<decltype(std::copysign((int)0, (long long)0)), double>::value), "");
908     static_assert((std::is_same<decltype(std::copysign((int)0, (unsigned long long)0)), double>::value), "");
909     static_assert((std::is_same<decltype(std::copysign((double)0, (double)0)), double>::value), "");
910     static_assert((std::is_same<decltype(std::copysign((long double)0, (long double)0)), long double>::value), "");
911     static_assert((std::is_same<decltype(std::copysign((float)0, (double)0)), double>::value), "");
912     static_assert((std::is_same<decltype(std::copysign((float)0, (long double)0)), long double>::value), "");
913     static_assert((std::is_same<decltype(std::copysign((double)0, (long double)0)), long double>::value), "");
914     static_assert((std::is_same<decltype(std::copysignf(0,0)), float>::value), "");
915     static_assert((std::is_same<decltype(std::copysignl(0,0)), long double>::value), "");
916     static_assert((std::is_same<decltype(std::copysign((int)0, (int)0)), double>::value), "");
917     static_assert((std::is_same<decltype(copysign(Ambiguous(), Ambiguous())), Ambiguous>::value), "");
918     assert(std::copysign(1,1) == 1);
919 }
920 
921 void test_erf()
922 {
923     static_assert((std::is_same<decltype(std::erf((float)0)), float>::value), "");
924     static_assert((std::is_same<decltype(std::erf((bool)0)), double>::value), "");
925     static_assert((std::is_same<decltype(std::erf((unsigned short)0)), double>::value), "");
926     static_assert((std::is_same<decltype(std::erf((int)0)), double>::value), "");
927     static_assert((std::is_same<decltype(std::erf((unsigned int)0)), double>::value), "");
928     static_assert((std::is_same<decltype(std::erf((long)0)), double>::value), "");
929     static_assert((std::is_same<decltype(std::erf((unsigned long)0)), double>::value), "");
930     static_assert((std::is_same<decltype(std::erf((long long)0)), double>::value), "");
931     static_assert((std::is_same<decltype(std::erf((unsigned long long)0)), double>::value), "");
932     static_assert((std::is_same<decltype(std::erf((double)0)), double>::value), "");
933     static_assert((std::is_same<decltype(std::erf((long double)0)), long double>::value), "");
934     static_assert((std::is_same<decltype(std::erff(0)), float>::value), "");
935     static_assert((std::is_same<decltype(std::erfl(0)), long double>::value), "");
936     static_assert((std::is_same<decltype(erf(Ambiguous())), Ambiguous>::value), "");
937     assert(std::erf(0) == 0);
938 }
939 
940 void test_erfc()
941 {
942     static_assert((std::is_same<decltype(std::erfc((float)0)), float>::value), "");
943     static_assert((std::is_same<decltype(std::erfc((bool)0)), double>::value), "");
944     static_assert((std::is_same<decltype(std::erfc((unsigned short)0)), double>::value), "");
945     static_assert((std::is_same<decltype(std::erfc((int)0)), double>::value), "");
946     static_assert((std::is_same<decltype(std::erfc((unsigned int)0)), double>::value), "");
947     static_assert((std::is_same<decltype(std::erfc((long)0)), double>::value), "");
948     static_assert((std::is_same<decltype(std::erfc((unsigned long)0)), double>::value), "");
949     static_assert((std::is_same<decltype(std::erfc((long long)0)), double>::value), "");
950     static_assert((std::is_same<decltype(std::erfc((unsigned long long)0)), double>::value), "");
951     static_assert((std::is_same<decltype(std::erfc((double)0)), double>::value), "");
952     static_assert((std::is_same<decltype(std::erfc((long double)0)), long double>::value), "");
953     static_assert((std::is_same<decltype(std::erfcf(0)), float>::value), "");
954     static_assert((std::is_same<decltype(std::erfcl(0)), long double>::value), "");
955     static_assert((std::is_same<decltype(erfc(Ambiguous())), Ambiguous>::value), "");
956     assert(std::erfc(0) == 1);
957 }
958 
959 void test_exp2()
960 {
961     static_assert((std::is_same<decltype(std::exp2((float)0)), float>::value), "");
962     static_assert((std::is_same<decltype(std::exp2((bool)0)), double>::value), "");
963     static_assert((std::is_same<decltype(std::exp2((unsigned short)0)), double>::value), "");
964     static_assert((std::is_same<decltype(std::exp2((int)0)), double>::value), "");
965     static_assert((std::is_same<decltype(std::exp2((unsigned int)0)), double>::value), "");
966     static_assert((std::is_same<decltype(std::exp2((long)0)), double>::value), "");
967     static_assert((std::is_same<decltype(std::exp2((unsigned long)0)), double>::value), "");
968     static_assert((std::is_same<decltype(std::exp2((long long)0)), double>::value), "");
969     static_assert((std::is_same<decltype(std::exp2((unsigned long long)0)), double>::value), "");
970     static_assert((std::is_same<decltype(std::exp2((double)0)), double>::value), "");
971     static_assert((std::is_same<decltype(std::exp2((long double)0)), long double>::value), "");
972     static_assert((std::is_same<decltype(std::exp2f(0)), float>::value), "");
973     static_assert((std::is_same<decltype(std::exp2l(0)), long double>::value), "");
974     static_assert((std::is_same<decltype(exp2(Ambiguous())), Ambiguous>::value), "");
975     assert(std::exp2(1) == 2);
976 }
977 
978 void test_expm1()
979 {
980     static_assert((std::is_same<decltype(std::expm1((float)0)), float>::value), "");
981     static_assert((std::is_same<decltype(std::expm1((bool)0)), double>::value), "");
982     static_assert((std::is_same<decltype(std::expm1((unsigned short)0)), double>::value), "");
983     static_assert((std::is_same<decltype(std::expm1((int)0)), double>::value), "");
984     static_assert((std::is_same<decltype(std::expm1((unsigned int)0)), double>::value), "");
985     static_assert((std::is_same<decltype(std::expm1((long)0)), double>::value), "");
986     static_assert((std::is_same<decltype(std::expm1((unsigned long)0)), double>::value), "");
987     static_assert((std::is_same<decltype(std::expm1((long long)0)), double>::value), "");
988     static_assert((std::is_same<decltype(std::expm1((unsigned long long)0)), double>::value), "");
989     static_assert((std::is_same<decltype(std::expm1((double)0)), double>::value), "");
990     static_assert((std::is_same<decltype(std::expm1((long double)0)), long double>::value), "");
991     static_assert((std::is_same<decltype(std::expm1f(0)), float>::value), "");
992     static_assert((std::is_same<decltype(std::expm1l(0)), long double>::value), "");
993     static_assert((std::is_same<decltype(expm1(Ambiguous())), Ambiguous>::value), "");
994     assert(std::expm1(0) == 0);
995 }
996 
997 void test_fdim()
998 {
999     static_assert((std::is_same<decltype(std::fdim((float)0, (float)0)), float>::value), "");
1000     static_assert((std::is_same<decltype(std::fdim((bool)0, (float)0)), double>::value), "");
1001     static_assert((std::is_same<decltype(std::fdim((unsigned short)0, (double)0)), double>::value), "");
1002     static_assert((std::is_same<decltype(std::fdim((int)0, (long double)0)), long double>::value), "");
1003     static_assert((std::is_same<decltype(std::fdim((float)0, (unsigned int)0)), double>::value), "");
1004     static_assert((std::is_same<decltype(std::fdim((double)0, (long)0)), double>::value), "");
1005     static_assert((std::is_same<decltype(std::fdim((long double)0, (unsigned long)0)), long double>::value), "");
1006     static_assert((std::is_same<decltype(std::fdim((int)0, (long long)0)), double>::value), "");
1007     static_assert((std::is_same<decltype(std::fdim((int)0, (unsigned long long)0)), double>::value), "");
1008     static_assert((std::is_same<decltype(std::fdim((double)0, (double)0)), double>::value), "");
1009     static_assert((std::is_same<decltype(std::fdim((long double)0, (long double)0)), long double>::value), "");
1010     static_assert((std::is_same<decltype(std::fdim((float)0, (double)0)), double>::value), "");
1011     static_assert((std::is_same<decltype(std::fdim((float)0, (long double)0)), long double>::value), "");
1012     static_assert((std::is_same<decltype(std::fdim((double)0, (long double)0)), long double>::value), "");
1013     static_assert((std::is_same<decltype(std::fdimf(0,0)), float>::value), "");
1014     static_assert((std::is_same<decltype(std::fdiml(0,0)), long double>::value), "");
1015     static_assert((std::is_same<decltype(std::fdim((int)0, (int)0)), double>::value), "");
1016     static_assert((std::is_same<decltype(fdim(Ambiguous(), Ambiguous())), Ambiguous>::value), "");
1017     assert(std::fdim(1,0) == 1);
1018 }
1019 
1020 void test_fma()
1021 {
1022     static_assert((std::is_same<decltype(std::fma((bool)0, (float)0, (float)0)), double>::value), "");
1023     static_assert((std::is_same<decltype(std::fma((char)0, (float)0, (float)0)), double>::value), "");
1024     static_assert((std::is_same<decltype(std::fma((unsigned)0, (float)0, (float)0)), double>::value), "");
1025     static_assert((std::is_same<decltype(std::fma((float)0, (int)0, (float)0)), double>::value), "");
1026     static_assert((std::is_same<decltype(std::fma((float)0, (long)0, (float)0)), double>::value), "");
1027     static_assert((std::is_same<decltype(std::fma((float)0, (float)0, (unsigned long long)0)), double>::value), "");
1028     static_assert((std::is_same<decltype(std::fma((float)0, (float)0, (double)0)), double>::value), "");
1029     static_assert((std::is_same<decltype(std::fma((float)0, (float)0, (long double)0)), long double>::value), "");
1030     static_assert((std::is_same<decltype(std::fma((float)0, (float)0, (float)0)), float>::value), "");
1031 
1032     static_assert((std::is_same<decltype(std::fma((bool)0, (double)0, (double)0)), double>::value), "");
1033     static_assert((std::is_same<decltype(std::fma((char)0, (double)0, (double)0)), double>::value), "");
1034     static_assert((std::is_same<decltype(std::fma((unsigned)0, (double)0, (double)0)), double>::value), "");
1035     static_assert((std::is_same<decltype(std::fma((double)0, (int)0, (double)0)), double>::value), "");
1036     static_assert((std::is_same<decltype(std::fma((double)0, (long)0, (double)0)), double>::value), "");
1037     static_assert((std::is_same<decltype(std::fma((double)0, (double)0, (unsigned long long)0)), double>::value), "");
1038     static_assert((std::is_same<decltype(std::fma((double)0, (double)0, (float)0)), double>::value), "");
1039     static_assert((std::is_same<decltype(std::fma((double)0, (double)0, (long double)0)), long double>::value), "");
1040     static_assert((std::is_same<decltype(std::fma((double)0, (double)0,  (double)0)), double>::value), "");
1041 
1042     static_assert((std::is_same<decltype(std::fma((bool)0, (long double)0, (long double)0)), long double>::value), "");
1043     static_assert((std::is_same<decltype(std::fma((char)0, (long double)0, (long double)0)), long double>::value), "");
1044     static_assert((std::is_same<decltype(std::fma((unsigned)0, (long double)0, (long double)0)), long double>::value), "");
1045     static_assert((std::is_same<decltype(std::fma((long double)0, (int)0, (long double)0)), long double>::value), "");
1046     static_assert((std::is_same<decltype(std::fma((long double)0, (long)0, (long double)0)), long double>::value), "");
1047     static_assert((std::is_same<decltype(std::fma((long double)0, (long double)0, (unsigned long long)0)), long double>::value), "");
1048     static_assert((std::is_same<decltype(std::fma((long double)0, (long double)0, (float)0)), long double>::value), "");
1049     static_assert((std::is_same<decltype(std::fma((double)0, (long double)0, (long double)0)), long double>::value), "");
1050     static_assert((std::is_same<decltype(std::fma((long double)0, (long double)0, (long double)0)), long double>::value), "");
1051 
1052     static_assert((std::is_same<decltype(std::fmaf(0,0,0)), float>::value), "");
1053     static_assert((std::is_same<decltype(std::fmal(0,0,0)), long double>::value), "");
1054     static_assert((std::is_same<decltype(fma(Ambiguous(), Ambiguous(), Ambiguous())), Ambiguous>::value), "");
1055     assert(std::fma(1,1,1) == 2);
1056 }
1057 
1058 void test_fmax()
1059 {
1060     static_assert((std::is_same<decltype(std::fmax((float)0, (float)0)), float>::value), "");
1061     static_assert((std::is_same<decltype(std::fmax((bool)0, (float)0)), double>::value), "");
1062     static_assert((std::is_same<decltype(std::fmax((unsigned short)0, (double)0)), double>::value), "");
1063     static_assert((std::is_same<decltype(std::fmax((int)0, (long double)0)), long double>::value), "");
1064     static_assert((std::is_same<decltype(std::fmax((float)0, (unsigned int)0)), double>::value), "");
1065     static_assert((std::is_same<decltype(std::fmax((double)0, (long)0)), double>::value), "");
1066     static_assert((std::is_same<decltype(std::fmax((long double)0, (unsigned long)0)), long double>::value), "");
1067     static_assert((std::is_same<decltype(std::fmax((int)0, (long long)0)), double>::value), "");
1068     static_assert((std::is_same<decltype(std::fmax((int)0, (unsigned long long)0)), double>::value), "");
1069     static_assert((std::is_same<decltype(std::fmax((double)0, (double)0)), double>::value), "");
1070     static_assert((std::is_same<decltype(std::fmax((long double)0, (long double)0)), long double>::value), "");
1071     static_assert((std::is_same<decltype(std::fmax((float)0, (double)0)), double>::value), "");
1072     static_assert((std::is_same<decltype(std::fmax((float)0, (long double)0)), long double>::value), "");
1073     static_assert((std::is_same<decltype(std::fmax((double)0, (long double)0)), long double>::value), "");
1074     static_assert((std::is_same<decltype(std::fmaxf(0,0)), float>::value), "");
1075     static_assert((std::is_same<decltype(std::fmaxl(0,0)), long double>::value), "");
1076     static_assert((std::is_same<decltype(std::fmax((int)0, (int)0)), double>::value), "");
1077     static_assert((std::is_same<decltype(fmax(Ambiguous(), Ambiguous())), Ambiguous>::value), "");
1078     assert(std::fmax(1,0) == 1);
1079 }
1080 
1081 void test_fmin()
1082 {
1083     static_assert((std::is_same<decltype(std::fmin((float)0, (float)0)), float>::value), "");
1084     static_assert((std::is_same<decltype(std::fmin((bool)0, (float)0)), double>::value), "");
1085     static_assert((std::is_same<decltype(std::fmin((unsigned short)0, (double)0)), double>::value), "");
1086     static_assert((std::is_same<decltype(std::fmin((int)0, (long double)0)), long double>::value), "");
1087     static_assert((std::is_same<decltype(std::fmin((float)0, (unsigned int)0)), double>::value), "");
1088     static_assert((std::is_same<decltype(std::fmin((double)0, (long)0)), double>::value), "");
1089     static_assert((std::is_same<decltype(std::fmin((long double)0, (unsigned long)0)), long double>::value), "");
1090     static_assert((std::is_same<decltype(std::fmin((int)0, (long long)0)), double>::value), "");
1091     static_assert((std::is_same<decltype(std::fmin((int)0, (unsigned long long)0)), double>::value), "");
1092     static_assert((std::is_same<decltype(std::fmin((double)0, (double)0)), double>::value), "");
1093     static_assert((std::is_same<decltype(std::fmin((long double)0, (long double)0)), long double>::value), "");
1094     static_assert((std::is_same<decltype(std::fmin((float)0, (double)0)), double>::value), "");
1095     static_assert((std::is_same<decltype(std::fmin((float)0, (long double)0)), long double>::value), "");
1096     static_assert((std::is_same<decltype(std::fmin((double)0, (long double)0)), long double>::value), "");
1097     static_assert((std::is_same<decltype(std::fminf(0,0)), float>::value), "");
1098     static_assert((std::is_same<decltype(std::fminl(0,0)), long double>::value), "");
1099     static_assert((std::is_same<decltype(std::fmin((int)0, (int)0)), double>::value), "");
1100     static_assert((std::is_same<decltype(fmin(Ambiguous(), Ambiguous())), Ambiguous>::value), "");
1101     assert(std::fmin(1,0) == 0);
1102 }
1103 
1104 void test_hypot()
1105 {
1106     static_assert((std::is_same<decltype(std::hypot((float)0, (float)0)), float>::value), "");
1107     static_assert((std::is_same<decltype(std::hypot((bool)0, (float)0)), double>::value), "");
1108     static_assert((std::is_same<decltype(std::hypot((unsigned short)0, (double)0)), double>::value), "");
1109     static_assert((std::is_same<decltype(std::hypot((int)0, (long double)0)), long double>::value), "");
1110     static_assert((std::is_same<decltype(std::hypot((float)0, (unsigned int)0)), double>::value), "");
1111     static_assert((std::is_same<decltype(std::hypot((double)0, (long)0)), double>::value), "");
1112     static_assert((std::is_same<decltype(std::hypot((long double)0, (unsigned long)0)), long double>::value), "");
1113     static_assert((std::is_same<decltype(std::hypot((int)0, (long long)0)), double>::value), "");
1114     static_assert((std::is_same<decltype(std::hypot((int)0, (unsigned long long)0)), double>::value), "");
1115     static_assert((std::is_same<decltype(std::hypot((double)0, (double)0)), double>::value), "");
1116     static_assert((std::is_same<decltype(std::hypot((long double)0, (long double)0)), long double>::value), "");
1117     static_assert((std::is_same<decltype(std::hypot((float)0, (double)0)), double>::value), "");
1118     static_assert((std::is_same<decltype(std::hypot((float)0, (long double)0)), long double>::value), "");
1119     static_assert((std::is_same<decltype(std::hypot((double)0, (long double)0)), long double>::value), "");
1120     static_assert((std::is_same<decltype(std::hypotf(0,0)), float>::value), "");
1121     static_assert((std::is_same<decltype(std::hypotl(0,0)), long double>::value), "");
1122     static_assert((std::is_same<decltype(std::hypot((int)0, (int)0)), double>::value), "");
1123     static_assert((std::is_same<decltype(hypot(Ambiguous(), Ambiguous())), Ambiguous>::value), "");
1124     assert(std::hypot(3,4) == 5);
1125 
1126 #if TEST_STD_VER > 14
1127     static_assert((std::is_same<decltype(std::hypot((float)0, (float)0, (float)0)), float>::value), "");
1128     static_assert((std::is_same<decltype(std::hypot((float)0, (bool)0, (float)0)), double>::value), "");
1129     static_assert((std::is_same<decltype(std::hypot((float)0, (unsigned short)0, (double)0)), double>::value), "");
1130     static_assert((std::is_same<decltype(std::hypot((float)0, (int)0, (long double)0)), long double>::value), "");
1131     static_assert((std::is_same<decltype(std::hypot((float)0, (double)0, (long)0)), double>::value), "");
1132     static_assert((std::is_same<decltype(std::hypot((float)0, (long double)0, (unsigned long)0)), long double>::value), "");
1133     static_assert((std::is_same<decltype(std::hypot((float)0, (int)0, (long long)0)), double>::value), "");
1134     static_assert((std::is_same<decltype(std::hypot((float)0, (int)0, (unsigned long long)0)), double>::value), "");
1135     static_assert((std::is_same<decltype(std::hypot((float)0, (double)0, (double)0)), double>::value), "");
1136     static_assert((std::is_same<decltype(std::hypot((float)0, (long double)0, (long double)0)), long double>::value), "");
1137     static_assert((std::is_same<decltype(std::hypot((float)0, (float)0, (double)0)), double>::value), "");
1138     static_assert((std::is_same<decltype(std::hypot((float)0, (float)0, (long double)0)), long double>::value), "");
1139     static_assert((std::is_same<decltype(std::hypot((float)0, (double)0, (long double)0)), long double>::value), "");
1140     static_assert((std::is_same<decltype(std::hypot((int)0, (int)0, (int)0)), double>::value), "");
1141     static_assert((std::is_same<decltype(hypot(Ambiguous(), Ambiguous(), Ambiguous())), Ambiguous>::value), "");
1142 
1143     assert(std::hypot(2,3,6) == 7);
1144     assert(std::hypot(1,4,8) == 9);
1145 #endif
1146 }
1147 
1148 void test_ilogb()
1149 {
1150     static_assert((std::is_same<decltype(std::ilogb((float)0)), int>::value), "");
1151     static_assert((std::is_same<decltype(std::ilogb((bool)0)), int>::value), "");
1152     static_assert((std::is_same<decltype(std::ilogb((unsigned short)0)), int>::value), "");
1153     static_assert((std::is_same<decltype(std::ilogb((int)0)), int>::value), "");
1154     static_assert((std::is_same<decltype(std::ilogb((unsigned int)0)), int>::value), "");
1155     static_assert((std::is_same<decltype(std::ilogb((long)0)), int>::value), "");
1156     static_assert((std::is_same<decltype(std::ilogb((unsigned long)0)), int>::value), "");
1157     static_assert((std::is_same<decltype(std::ilogb((long long)0)), int>::value), "");
1158     static_assert((std::is_same<decltype(std::ilogb((unsigned long long)0)), int>::value), "");
1159     static_assert((std::is_same<decltype(std::ilogb((double)0)), int>::value), "");
1160     static_assert((std::is_same<decltype(std::ilogb((long double)0)), int>::value), "");
1161     static_assert((std::is_same<decltype(std::ilogbf(0)), int>::value), "");
1162     static_assert((std::is_same<decltype(std::ilogbl(0)), int>::value), "");
1163     static_assert((std::is_same<decltype(ilogb(Ambiguous())), Ambiguous>::value), "");
1164     assert(std::ilogb(1) == 0);
1165 }
1166 
1167 void test_lerp()
1168 {
1169     // See also "lerp.pass.cpp"
1170 
1171 #if TEST_STD_VER > 17
1172     static_assert((std::is_same<decltype(std::lerp((float)0, (float)0, (float)0)), float>::value), "");
1173     static_assert((std::is_same<decltype(std::lerp((float)0, (bool)0, (float)0)), double>::value), "");
1174     static_assert((std::is_same<decltype(std::lerp((float)0, (unsigned short)0, (double)0)), double>::value), "");
1175     static_assert((std::is_same<decltype(std::lerp((float)0, (int)0, (long double)0)), long double>::value), "");
1176     static_assert((std::is_same<decltype(std::lerp((float)0, (double)0, (long)0)), double>::value), "");
1177     static_assert((std::is_same<decltype(std::lerp((float)0, (long double)0, (unsigned long)0)), long double>::value), "");
1178     static_assert((std::is_same<decltype(std::lerp((float)0, (int)0, (long long)0)), double>::value), "");
1179     static_assert((std::is_same<decltype(std::lerp((float)0, (int)0, (unsigned long long)0)), double>::value), "");
1180     static_assert((std::is_same<decltype(std::lerp((float)0, (double)0, (double)0)), double>::value), "");
1181     static_assert((std::is_same<decltype(std::lerp((float)0, (long double)0, (long double)0)), long double>::value), "");
1182     static_assert((std::is_same<decltype(std::lerp((float)0, (float)0, (double)0)), double>::value), "");
1183     static_assert((std::is_same<decltype(std::lerp((float)0, (float)0, (long double)0)), long double>::value), "");
1184     static_assert((std::is_same<decltype(std::lerp((float)0, (double)0, (long double)0)), long double>::value), "");
1185     static_assert((std::is_same<decltype(std::lerp((int)0, (int)0, (int)0)), double>::value), "");
1186     static_assert((std::is_same<decltype(lerp(Ambiguous(), Ambiguous(), Ambiguous())), Ambiguous>::value), "");
1187 
1188     assert(std::lerp(2, 3, 1) == 3);
1189     assert(std::lerp(1, 3, 0.5) == 2);
1190     assert(std::lerp(0, 4.0, 0) == 0);
1191     static_assert(std::lerp(2, 3, 1) == 3);
1192     static_assert(std::lerp(1, 3, 0.5) == 2);
1193     static_assert(std::lerp(0, 4.0, 0) == 0);
1194 #endif
1195 }
1196 
1197 void test_lgamma()
1198 {
1199     static_assert((std::is_same<decltype(std::lgamma((float)0)), float>::value), "");
1200     static_assert((std::is_same<decltype(std::lgamma((bool)0)), double>::value), "");
1201     static_assert((std::is_same<decltype(std::lgamma((unsigned short)0)), double>::value), "");
1202     static_assert((std::is_same<decltype(std::lgamma((int)0)), double>::value), "");
1203     static_assert((std::is_same<decltype(std::lgamma((unsigned int)0)), double>::value), "");
1204     static_assert((std::is_same<decltype(std::lgamma((long)0)), double>::value), "");
1205     static_assert((std::is_same<decltype(std::lgamma((unsigned long)0)), double>::value), "");
1206     static_assert((std::is_same<decltype(std::lgamma((long long)0)), double>::value), "");
1207     static_assert((std::is_same<decltype(std::lgamma((unsigned long long)0)), double>::value), "");
1208     static_assert((std::is_same<decltype(std::lgamma((double)0)), double>::value), "");
1209     static_assert((std::is_same<decltype(std::lgamma((long double)0)), long double>::value), "");
1210     static_assert((std::is_same<decltype(std::lgammaf(0)), float>::value), "");
1211     static_assert((std::is_same<decltype(std::lgammal(0)), long double>::value), "");
1212     static_assert((std::is_same<decltype(lgamma(Ambiguous())), Ambiguous>::value), "");
1213     assert(std::lgamma(1) == 0);
1214 }
1215 
1216 void test_llrint()
1217 {
1218     static_assert((std::is_same<decltype(std::llrint((float)0)), long long>::value), "");
1219     static_assert((std::is_same<decltype(std::llrint((bool)0)), long long>::value), "");
1220     static_assert((std::is_same<decltype(std::llrint((unsigned short)0)), long long>::value), "");
1221     static_assert((std::is_same<decltype(std::llrint((int)0)), long long>::value), "");
1222     static_assert((std::is_same<decltype(std::llrint((unsigned int)0)), long long>::value), "");
1223     static_assert((std::is_same<decltype(std::llrint((long)0)), long long>::value), "");
1224     static_assert((std::is_same<decltype(std::llrint((unsigned long)0)), long long>::value), "");
1225     static_assert((std::is_same<decltype(std::llrint((long long)0)), long long>::value), "");
1226     static_assert((std::is_same<decltype(std::llrint((unsigned long long)0)), long long>::value), "");
1227     static_assert((std::is_same<decltype(std::llrint((double)0)), long long>::value), "");
1228     static_assert((std::is_same<decltype(std::llrint((long double)0)), long long>::value), "");
1229     static_assert((std::is_same<decltype(std::llrintf(0)), long long>::value), "");
1230     static_assert((std::is_same<decltype(std::llrintl(0)), long long>::value), "");
1231     static_assert((std::is_same<decltype(llrint(Ambiguous())), Ambiguous>::value), "");
1232     assert(std::llrint(1) == 1LL);
1233 }
1234 
1235 void test_llround()
1236 {
1237     static_assert((std::is_same<decltype(std::llround((float)0)), long long>::value), "");
1238     static_assert((std::is_same<decltype(std::llround((bool)0)), long long>::value), "");
1239     static_assert((std::is_same<decltype(std::llround((unsigned short)0)), long long>::value), "");
1240     static_assert((std::is_same<decltype(std::llround((int)0)), long long>::value), "");
1241     static_assert((std::is_same<decltype(std::llround((unsigned int)0)), long long>::value), "");
1242     static_assert((std::is_same<decltype(std::llround((long)0)), long long>::value), "");
1243     static_assert((std::is_same<decltype(std::llround((unsigned long)0)), long long>::value), "");
1244     static_assert((std::is_same<decltype(std::llround((long long)0)), long long>::value), "");
1245     static_assert((std::is_same<decltype(std::llround((unsigned long long)0)), long long>::value), "");
1246     static_assert((std::is_same<decltype(std::llround((double)0)), long long>::value), "");
1247     static_assert((std::is_same<decltype(std::llround((long double)0)), long long>::value), "");
1248     static_assert((std::is_same<decltype(std::llroundf(0)), long long>::value), "");
1249     static_assert((std::is_same<decltype(std::llroundl(0)), long long>::value), "");
1250     static_assert((std::is_same<decltype(llround(Ambiguous())), Ambiguous>::value), "");
1251     assert(std::llround(1) == 1LL);
1252 }
1253 
1254 void test_log1p()
1255 {
1256     static_assert((std::is_same<decltype(std::log1p((float)0)), float>::value), "");
1257     static_assert((std::is_same<decltype(std::log1p((bool)0)), double>::value), "");
1258     static_assert((std::is_same<decltype(std::log1p((unsigned short)0)), double>::value), "");
1259     static_assert((std::is_same<decltype(std::log1p((int)0)), double>::value), "");
1260     static_assert((std::is_same<decltype(std::log1p((unsigned int)0)), double>::value), "");
1261     static_assert((std::is_same<decltype(std::log1p((long)0)), double>::value), "");
1262     static_assert((std::is_same<decltype(std::log1p((unsigned long)0)), double>::value), "");
1263     static_assert((std::is_same<decltype(std::log1p((long long)0)), double>::value), "");
1264     static_assert((std::is_same<decltype(std::log1p((unsigned long long)0)), double>::value), "");
1265     static_assert((std::is_same<decltype(std::log1p((double)0)), double>::value), "");
1266     static_assert((std::is_same<decltype(std::log1p((long double)0)), long double>::value), "");
1267     static_assert((std::is_same<decltype(std::log1pf(0)), float>::value), "");
1268     static_assert((std::is_same<decltype(std::log1pl(0)), long double>::value), "");
1269     static_assert((std::is_same<decltype(log1p(Ambiguous())), Ambiguous>::value), "");
1270     assert(std::log1p(0) == 0);
1271 }
1272 
1273 void test_log2()
1274 {
1275     static_assert((std::is_same<decltype(std::log2((float)0)), float>::value), "");
1276     static_assert((std::is_same<decltype(std::log2((bool)0)), double>::value), "");
1277     static_assert((std::is_same<decltype(std::log2((unsigned short)0)), double>::value), "");
1278     static_assert((std::is_same<decltype(std::log2((int)0)), double>::value), "");
1279     static_assert((std::is_same<decltype(std::log2((unsigned int)0)), double>::value), "");
1280     static_assert((std::is_same<decltype(std::log2((long)0)), double>::value), "");
1281     static_assert((std::is_same<decltype(std::log2((unsigned long)0)), double>::value), "");
1282     static_assert((std::is_same<decltype(std::log2((long long)0)), double>::value), "");
1283     static_assert((std::is_same<decltype(std::log2((unsigned long long)0)), double>::value), "");
1284     static_assert((std::is_same<decltype(std::log2((double)0)), double>::value), "");
1285     static_assert((std::is_same<decltype(std::log2((long double)0)), long double>::value), "");
1286     static_assert((std::is_same<decltype(std::log2f(0)), float>::value), "");
1287     static_assert((std::is_same<decltype(std::log2l(0)), long double>::value), "");
1288     static_assert((std::is_same<decltype(log2(Ambiguous())), Ambiguous>::value), "");
1289     assert(std::log2(1) == 0);
1290 }
1291 
1292 void test_logb()
1293 {
1294     static_assert((std::is_same<decltype(std::logb((float)0)), float>::value), "");
1295     static_assert((std::is_same<decltype(std::logb((bool)0)), double>::value), "");
1296     static_assert((std::is_same<decltype(std::logb((unsigned short)0)), double>::value), "");
1297     static_assert((std::is_same<decltype(std::logb((int)0)), double>::value), "");
1298     static_assert((std::is_same<decltype(std::logb((unsigned int)0)), double>::value), "");
1299     static_assert((std::is_same<decltype(std::logb((long)0)), double>::value), "");
1300     static_assert((std::is_same<decltype(std::logb((unsigned long)0)), double>::value), "");
1301     static_assert((std::is_same<decltype(std::logb((long long)0)), double>::value), "");
1302     static_assert((std::is_same<decltype(std::logb((unsigned long long)0)), double>::value), "");
1303     static_assert((std::is_same<decltype(std::logb((double)0)), double>::value), "");
1304     static_assert((std::is_same<decltype(std::logb((long double)0)), long double>::value), "");
1305     static_assert((std::is_same<decltype(std::logbf(0)), float>::value), "");
1306     static_assert((std::is_same<decltype(std::logbl(0)), long double>::value), "");
1307     static_assert((std::is_same<decltype(logb(Ambiguous())), Ambiguous>::value), "");
1308     assert(std::logb(1) == 0);
1309 }
1310 
1311 void test_lrint()
1312 {
1313     static_assert((std::is_same<decltype(std::lrint((float)0)), long>::value), "");
1314     static_assert((std::is_same<decltype(std::lrint((bool)0)), long>::value), "");
1315     static_assert((std::is_same<decltype(std::lrint((unsigned short)0)), long>::value), "");
1316     static_assert((std::is_same<decltype(std::lrint((int)0)), long>::value), "");
1317     static_assert((std::is_same<decltype(std::lrint((unsigned int)0)), long>::value), "");
1318     static_assert((std::is_same<decltype(std::lrint((long)0)), long>::value), "");
1319     static_assert((std::is_same<decltype(std::lrint((unsigned long)0)), long>::value), "");
1320     static_assert((std::is_same<decltype(std::lrint((long long)0)), long>::value), "");
1321     static_assert((std::is_same<decltype(std::lrint((unsigned long long)0)), long>::value), "");
1322     static_assert((std::is_same<decltype(std::lrint((double)0)), long>::value), "");
1323     static_assert((std::is_same<decltype(std::lrint((long double)0)), long>::value), "");
1324     static_assert((std::is_same<decltype(std::lrintf(0)), long>::value), "");
1325     static_assert((std::is_same<decltype(std::lrintl(0)), long>::value), "");
1326     static_assert((std::is_same<decltype(lrint(Ambiguous())), Ambiguous>::value), "");
1327     assert(std::lrint(1) == 1L);
1328 }
1329 
1330 void test_lround()
1331 {
1332     static_assert((std::is_same<decltype(std::lround((float)0)), long>::value), "");
1333     static_assert((std::is_same<decltype(std::lround((bool)0)), long>::value), "");
1334     static_assert((std::is_same<decltype(std::lround((unsigned short)0)), long>::value), "");
1335     static_assert((std::is_same<decltype(std::lround((int)0)), long>::value), "");
1336     static_assert((std::is_same<decltype(std::lround((unsigned int)0)), long>::value), "");
1337     static_assert((std::is_same<decltype(std::lround((long)0)), long>::value), "");
1338     static_assert((std::is_same<decltype(std::lround((unsigned long)0)), long>::value), "");
1339     static_assert((std::is_same<decltype(std::lround((long long)0)), long>::value), "");
1340     static_assert((std::is_same<decltype(std::lround((unsigned long long)0)), long>::value), "");
1341     static_assert((std::is_same<decltype(std::lround((double)0)), long>::value), "");
1342     static_assert((std::is_same<decltype(std::lround((long double)0)), long>::value), "");
1343     static_assert((std::is_same<decltype(std::lroundf(0)), long>::value), "");
1344     static_assert((std::is_same<decltype(std::lroundl(0)), long>::value), "");
1345     static_assert((std::is_same<decltype(lround(Ambiguous())), Ambiguous>::value), "");
1346     assert(std::lround(1) == 1L);
1347 }
1348 
1349 void test_nan()
1350 {
1351     static_assert((std::is_same<decltype(std::nan("")), double>::value), "");
1352     static_assert((std::is_same<decltype(std::nanf("")), float>::value), "");
1353     static_assert((std::is_same<decltype(std::nanl("")), long double>::value), "");
1354 }
1355 
1356 void test_nearbyint()
1357 {
1358     static_assert((std::is_same<decltype(std::nearbyint((float)0)), float>::value), "");
1359     static_assert((std::is_same<decltype(std::nearbyint((bool)0)), double>::value), "");
1360     static_assert((std::is_same<decltype(std::nearbyint((unsigned short)0)), double>::value), "");
1361     static_assert((std::is_same<decltype(std::nearbyint((int)0)), double>::value), "");
1362     static_assert((std::is_same<decltype(std::nearbyint((unsigned int)0)), double>::value), "");
1363     static_assert((std::is_same<decltype(std::nearbyint((long)0)), double>::value), "");
1364     static_assert((std::is_same<decltype(std::nearbyint((unsigned long)0)), double>::value), "");
1365     static_assert((std::is_same<decltype(std::nearbyint((long long)0)), double>::value), "");
1366     static_assert((std::is_same<decltype(std::nearbyint((unsigned long long)0)), double>::value), "");
1367     static_assert((std::is_same<decltype(std::nearbyint((double)0)), double>::value), "");
1368     static_assert((std::is_same<decltype(std::nearbyint((long double)0)), long double>::value), "");
1369     static_assert((std::is_same<decltype(std::nearbyintf(0)), float>::value), "");
1370     static_assert((std::is_same<decltype(std::nearbyintl(0)), long double>::value), "");
1371     static_assert((std::is_same<decltype(nearbyint(Ambiguous())), Ambiguous>::value), "");
1372     assert(std::nearbyint(1) == 1);
1373 }
1374 
1375 void test_nextafter()
1376 {
1377     static_assert((std::is_same<decltype(std::nextafter((float)0, (float)0)), float>::value), "");
1378     static_assert((std::is_same<decltype(std::nextafter((bool)0, (float)0)), double>::value), "");
1379     static_assert((std::is_same<decltype(std::nextafter((unsigned short)0, (double)0)), double>::value), "");
1380     static_assert((std::is_same<decltype(std::nextafter((int)0, (long double)0)), long double>::value), "");
1381     static_assert((std::is_same<decltype(std::nextafter((float)0, (unsigned int)0)), double>::value), "");
1382     static_assert((std::is_same<decltype(std::nextafter((double)0, (long)0)), double>::value), "");
1383     static_assert((std::is_same<decltype(std::nextafter((long double)0, (unsigned long)0)), long double>::value), "");
1384     static_assert((std::is_same<decltype(std::nextafter((int)0, (long long)0)), double>::value), "");
1385     static_assert((std::is_same<decltype(std::nextafter((int)0, (unsigned long long)0)), double>::value), "");
1386     static_assert((std::is_same<decltype(std::nextafter((double)0, (double)0)), double>::value), "");
1387     static_assert((std::is_same<decltype(std::nextafter((long double)0, (long double)0)), long double>::value), "");
1388     static_assert((std::is_same<decltype(std::nextafter((float)0, (double)0)), double>::value), "");
1389     static_assert((std::is_same<decltype(std::nextafter((float)0, (long double)0)), long double>::value), "");
1390     static_assert((std::is_same<decltype(std::nextafter((double)0, (long double)0)), long double>::value), "");
1391     static_assert((std::is_same<decltype(std::nextafterf(0,0)), float>::value), "");
1392     static_assert((std::is_same<decltype(std::nextafterl(0,0)), long double>::value), "");
1393     static_assert((std::is_same<decltype(std::nextafter((int)0, (int)0)), double>::value), "");
1394     static_assert((std::is_same<decltype(nextafter(Ambiguous(), Ambiguous())), Ambiguous>::value), "");
1395     assert(std::nextafter(0,1) == hexfloat<double>(0x1, 0, -1074));
1396 }
1397 
1398 void test_nexttoward()
1399 {
1400     static_assert((std::is_same<decltype(std::nexttoward((float)0, (long double)0)), float>::value), "");
1401     static_assert((std::is_same<decltype(std::nexttoward((bool)0, (long double)0)), double>::value), "");
1402     static_assert((std::is_same<decltype(std::nexttoward((unsigned short)0, (long double)0)), double>::value), "");
1403     static_assert((std::is_same<decltype(std::nexttoward((int)0, (long double)0)), double>::value), "");
1404     static_assert((std::is_same<decltype(std::nexttoward((unsigned int)0, (long double)0)), double>::value), "");
1405     static_assert((std::is_same<decltype(std::nexttoward((long)0, (long double)0)), double>::value), "");
1406     static_assert((std::is_same<decltype(std::nexttoward((unsigned long)0, (long double)0)), double>::value), "");
1407     static_assert((std::is_same<decltype(std::nexttoward((long long)0, (long double)0)), double>::value), "");
1408     static_assert((std::is_same<decltype(std::nexttoward((unsigned long long)0, (long double)0)), double>::value), "");
1409     static_assert((std::is_same<decltype(std::nexttoward((double)0, (long double)0)), double>::value), "");
1410     static_assert((std::is_same<decltype(std::nexttoward((long double)0, (long double)0)), long double>::value), "");
1411     static_assert((std::is_same<decltype(std::nexttowardf(0, (long double)0)), float>::value), "");
1412     static_assert((std::is_same<decltype(std::nexttowardl(0, (long double)0)), long double>::value), "");
1413     static_assert((std::is_same<decltype(nexttoward(Ambiguous(), Ambiguous())), Ambiguous>::value), "");
1414     assert(std::nexttoward(0, 1) == hexfloat<double>(0x1, 0, -1074));
1415 }
1416 
1417 void test_remainder()
1418 {
1419     static_assert((std::is_same<decltype(std::remainder((float)0, (float)0)), float>::value), "");
1420     static_assert((std::is_same<decltype(std::remainder((bool)0, (float)0)), double>::value), "");
1421     static_assert((std::is_same<decltype(std::remainder((unsigned short)0, (double)0)), double>::value), "");
1422     static_assert((std::is_same<decltype(std::remainder((int)0, (long double)0)), long double>::value), "");
1423     static_assert((std::is_same<decltype(std::remainder((float)0, (unsigned int)0)), double>::value), "");
1424     static_assert((std::is_same<decltype(std::remainder((double)0, (long)0)), double>::value), "");
1425     static_assert((std::is_same<decltype(std::remainder((long double)0, (unsigned long)0)), long double>::value), "");
1426     static_assert((std::is_same<decltype(std::remainder((int)0, (long long)0)), double>::value), "");
1427     static_assert((std::is_same<decltype(std::remainder((int)0, (unsigned long long)0)), double>::value), "");
1428     static_assert((std::is_same<decltype(std::remainder((double)0, (double)0)), double>::value), "");
1429     static_assert((std::is_same<decltype(std::remainder((long double)0, (long double)0)), long double>::value), "");
1430     static_assert((std::is_same<decltype(std::remainder((float)0, (double)0)), double>::value), "");
1431     static_assert((std::is_same<decltype(std::remainder((float)0, (long double)0)), long double>::value), "");
1432     static_assert((std::is_same<decltype(std::remainder((double)0, (long double)0)), long double>::value), "");
1433     static_assert((std::is_same<decltype(std::remainderf(0,0)), float>::value), "");
1434     static_assert((std::is_same<decltype(std::remainderl(0,0)), long double>::value), "");
1435     static_assert((std::is_same<decltype(std::remainder((int)0, (int)0)), double>::value), "");
1436     static_assert((std::is_same<decltype(remainder(Ambiguous(), Ambiguous())), Ambiguous>::value), "");
1437     assert(std::remainder(0.5,1) == 0.5);
1438 }
1439 
1440 void test_remquo()
1441 {
1442     int ip;
1443     static_assert((std::is_same<decltype(std::remquo((float)0, (float)0, &ip)), float>::value), "");
1444     static_assert((std::is_same<decltype(std::remquo((bool)0, (float)0, &ip)), double>::value), "");
1445     static_assert((std::is_same<decltype(std::remquo((unsigned short)0, (double)0, &ip)), double>::value), "");
1446     static_assert((std::is_same<decltype(std::remquo((int)0, (long double)0, &ip)), long double>::value), "");
1447     static_assert((std::is_same<decltype(std::remquo((float)0, (unsigned int)0, &ip)), double>::value), "");
1448     static_assert((std::is_same<decltype(std::remquo((double)0, (long)0, &ip)), double>::value), "");
1449     static_assert((std::is_same<decltype(std::remquo((long double)0, (unsigned long)0, &ip)), long double>::value), "");
1450     static_assert((std::is_same<decltype(std::remquo((int)0, (long long)0, &ip)), double>::value), "");
1451     static_assert((std::is_same<decltype(std::remquo((int)0, (unsigned long long)0, &ip)), double>::value), "");
1452     static_assert((std::is_same<decltype(std::remquo((double)0, (double)0, &ip)), double>::value), "");
1453     static_assert((std::is_same<decltype(std::remquo((long double)0, (long double)0, &ip)), long double>::value), "");
1454     static_assert((std::is_same<decltype(std::remquo((float)0, (double)0, &ip)), double>::value), "");
1455     static_assert((std::is_same<decltype(std::remquo((float)0, (long double)0, &ip)), long double>::value), "");
1456     static_assert((std::is_same<decltype(std::remquo((double)0, (long double)0, &ip)), long double>::value), "");
1457     static_assert((std::is_same<decltype(std::remquof(0,0, &ip)), float>::value), "");
1458     static_assert((std::is_same<decltype(std::remquol(0,0, &ip)), long double>::value), "");
1459     static_assert((std::is_same<decltype(std::remquo((int)0, (int)0, &ip)), double>::value), "");
1460     static_assert((std::is_same<decltype(remquo(Ambiguous(), Ambiguous(), &ip)), Ambiguous>::value), "");
1461     assert(std::remquo(0.5,1, &ip) == 0.5);
1462 }
1463 
1464 void test_rint()
1465 {
1466     static_assert((std::is_same<decltype(std::rint((float)0)), float>::value), "");
1467     static_assert((std::is_same<decltype(std::rint((bool)0)), double>::value), "");
1468     static_assert((std::is_same<decltype(std::rint((unsigned short)0)), double>::value), "");
1469     static_assert((std::is_same<decltype(std::rint((int)0)), double>::value), "");
1470     static_assert((std::is_same<decltype(std::rint((unsigned int)0)), double>::value), "");
1471     static_assert((std::is_same<decltype(std::rint((long)0)), double>::value), "");
1472     static_assert((std::is_same<decltype(std::rint((unsigned long)0)), double>::value), "");
1473     static_assert((std::is_same<decltype(std::rint((long long)0)), double>::value), "");
1474     static_assert((std::is_same<decltype(std::rint((unsigned long long)0)), double>::value), "");
1475     static_assert((std::is_same<decltype(std::rint((double)0)), double>::value), "");
1476     static_assert((std::is_same<decltype(std::rint((long double)0)), long double>::value), "");
1477     static_assert((std::is_same<decltype(std::rintf(0)), float>::value), "");
1478     static_assert((std::is_same<decltype(std::rintl(0)), long double>::value), "");
1479     static_assert((std::is_same<decltype(rint(Ambiguous())), Ambiguous>::value), "");
1480     assert(std::rint(1) == 1);
1481 }
1482 
1483 void test_round()
1484 {
1485     static_assert((std::is_same<decltype(std::round((float)0)), float>::value), "");
1486     static_assert((std::is_same<decltype(std::round((bool)0)), double>::value), "");
1487     static_assert((std::is_same<decltype(std::round((unsigned short)0)), double>::value), "");
1488     static_assert((std::is_same<decltype(std::round((int)0)), double>::value), "");
1489     static_assert((std::is_same<decltype(std::round((unsigned int)0)), double>::value), "");
1490     static_assert((std::is_same<decltype(std::round((long)0)), double>::value), "");
1491     static_assert((std::is_same<decltype(std::round((unsigned long)0)), double>::value), "");
1492     static_assert((std::is_same<decltype(std::round((long long)0)), double>::value), "");
1493     static_assert((std::is_same<decltype(std::round((unsigned long long)0)), double>::value), "");
1494     static_assert((std::is_same<decltype(std::round((double)0)), double>::value), "");
1495     static_assert((std::is_same<decltype(std::round((long double)0)), long double>::value), "");
1496     static_assert((std::is_same<decltype(std::roundf(0)), float>::value), "");
1497     static_assert((std::is_same<decltype(std::roundl(0)), long double>::value), "");
1498     static_assert((std::is_same<decltype(round(Ambiguous())), Ambiguous>::value), "");
1499     assert(std::round(1) == 1);
1500 }
1501 
1502 void test_scalbln()
1503 {
1504     static_assert((std::is_same<decltype(std::scalbln((float)0, (long)0)), float>::value), "");
1505     static_assert((std::is_same<decltype(std::scalbln((bool)0, (long)0)), double>::value), "");
1506     static_assert((std::is_same<decltype(std::scalbln((unsigned short)0, (long)0)), double>::value), "");
1507     static_assert((std::is_same<decltype(std::scalbln((int)0, (long)0)), double>::value), "");
1508     static_assert((std::is_same<decltype(std::scalbln((unsigned int)0, (long)0)), double>::value), "");
1509     static_assert((std::is_same<decltype(std::scalbln((long)0, (long)0)), double>::value), "");
1510     static_assert((std::is_same<decltype(std::scalbln((unsigned long)0, (long)0)), double>::value), "");
1511     static_assert((std::is_same<decltype(std::scalbln((long long)0, (long)0)), double>::value), "");
1512     static_assert((std::is_same<decltype(std::scalbln((unsigned long long)0, (long)0)), double>::value), "");
1513     static_assert((std::is_same<decltype(std::scalbln((double)0, (long)0)), double>::value), "");
1514     static_assert((std::is_same<decltype(std::scalbln((long double)0, (long)0)), long double>::value), "");
1515     static_assert((std::is_same<decltype(std::scalblnf(0, (long)0)), float>::value), "");
1516     static_assert((std::is_same<decltype(std::scalblnl(0, (long)0)), long double>::value), "");
1517     static_assert((std::is_same<decltype(scalbln(Ambiguous(), Ambiguous())), Ambiguous>::value), "");
1518     assert(std::scalbln(1, 1) == 2);
1519 }
1520 
1521 void test_scalbn()
1522 {
1523     static_assert((std::is_same<decltype(std::scalbn((float)0, (int)0)), float>::value), "");
1524     static_assert((std::is_same<decltype(std::scalbn((bool)0, (int)0)), double>::value), "");
1525     static_assert((std::is_same<decltype(std::scalbn((unsigned short)0, (int)0)), double>::value), "");
1526     static_assert((std::is_same<decltype(std::scalbn((int)0, (int)0)), double>::value), "");
1527     static_assert((std::is_same<decltype(std::scalbn((unsigned int)0, (int)0)), double>::value), "");
1528     static_assert((std::is_same<decltype(std::scalbn((long)0, (int)0)), double>::value), "");
1529     static_assert((std::is_same<decltype(std::scalbn((unsigned long)0, (int)0)), double>::value), "");
1530     static_assert((std::is_same<decltype(std::scalbn((long long)0, (int)0)), double>::value), "");
1531     static_assert((std::is_same<decltype(std::scalbn((unsigned long long)0, (int)0)), double>::value), "");
1532     static_assert((std::is_same<decltype(std::scalbn((double)0, (int)0)), double>::value), "");
1533     static_assert((std::is_same<decltype(std::scalbn((long double)0, (int)0)), long double>::value), "");
1534     static_assert((std::is_same<decltype(std::scalbnf(0, (int)0)), float>::value), "");
1535     static_assert((std::is_same<decltype(std::scalbnl(0, (int)0)), long double>::value), "");
1536     static_assert((std::is_same<decltype(scalbn(Ambiguous(), Ambiguous())), Ambiguous>::value), "");
1537     assert(std::scalbn(1, 1) == 2);
1538 }
1539 
1540 void test_tgamma()
1541 {
1542     static_assert((std::is_same<decltype(std::tgamma((float)0)), float>::value), "");
1543     static_assert((std::is_same<decltype(std::tgamma((bool)0)), double>::value), "");
1544     static_assert((std::is_same<decltype(std::tgamma((unsigned short)0)), double>::value), "");
1545     static_assert((std::is_same<decltype(std::tgamma((int)0)), double>::value), "");
1546     static_assert((std::is_same<decltype(std::tgamma((unsigned int)0)), double>::value), "");
1547     static_assert((std::is_same<decltype(std::tgamma((long)0)), double>::value), "");
1548     static_assert((std::is_same<decltype(std::tgamma((unsigned long)0)), double>::value), "");
1549     static_assert((std::is_same<decltype(std::tgamma((long long)0)), double>::value), "");
1550     static_assert((std::is_same<decltype(std::tgamma((unsigned long long)0)), double>::value), "");
1551     static_assert((std::is_same<decltype(std::tgamma((double)0)), double>::value), "");
1552     static_assert((std::is_same<decltype(std::tgamma((long double)0)), long double>::value), "");
1553     static_assert((std::is_same<decltype(std::tgammaf(0)), float>::value), "");
1554     static_assert((std::is_same<decltype(std::tgammal(0)), long double>::value), "");
1555     static_assert((std::is_same<decltype(tgamma(Ambiguous())), Ambiguous>::value), "");
1556     assert(std::tgamma(1) == 1);
1557 }
1558 
1559 void test_trunc()
1560 {
1561     static_assert((std::is_same<decltype(std::trunc((float)0)), float>::value), "");
1562     static_assert((std::is_same<decltype(std::trunc((bool)0)), double>::value), "");
1563     static_assert((std::is_same<decltype(std::trunc((unsigned short)0)), double>::value), "");
1564     static_assert((std::is_same<decltype(std::trunc((int)0)), double>::value), "");
1565     static_assert((std::is_same<decltype(std::trunc((unsigned int)0)), double>::value), "");
1566     static_assert((std::is_same<decltype(std::trunc((long)0)), double>::value), "");
1567     static_assert((std::is_same<decltype(std::trunc((unsigned long)0)), double>::value), "");
1568     static_assert((std::is_same<decltype(std::trunc((long long)0)), double>::value), "");
1569     static_assert((std::is_same<decltype(std::trunc((unsigned long long)0)), double>::value), "");
1570     static_assert((std::is_same<decltype(std::trunc((double)0)), double>::value), "");
1571     static_assert((std::is_same<decltype(std::trunc((long double)0)), long double>::value), "");
1572     static_assert((std::is_same<decltype(std::truncf(0)), float>::value), "");
1573     static_assert((std::is_same<decltype(std::truncl(0)), long double>::value), "");
1574     static_assert((std::is_same<decltype(trunc(Ambiguous())), Ambiguous>::value), "");
1575     assert(std::trunc(1) == 1);
1576 }
1577 
1578 int main(int, char**)
1579 {
1580     test_abs();
1581     test_acos();
1582     test_asin();
1583     test_atan();
1584     test_atan2();
1585     test_ceil();
1586     test_cos();
1587     test_cosh();
1588     test_exp();
1589     test_fabs();
1590     test_floor();
1591     test_fmod();
1592     test_frexp();
1593     test_ldexp();
1594     test_log();
1595     test_log10();
1596     test_modf();
1597     test_pow();
1598     test_sin();
1599     test_sinh();
1600     test_sqrt();
1601     test_tan();
1602     test_tanh();
1603     test_signbit();
1604     test_fpclassify();
1605     test_isfinite();
1606     test_isnormal();
1607     test_isgreater();
1608     test_isgreaterequal();
1609     test_isinf();
1610     test_isless();
1611     test_islessequal();
1612     test_islessgreater();
1613     test_isnan();
1614     test_isunordered();
1615     test_acosh();
1616     test_asinh();
1617     test_atanh();
1618     test_cbrt();
1619     test_copysign();
1620     test_erf();
1621     test_erfc();
1622     test_exp2();
1623     test_expm1();
1624     test_fdim();
1625     test_fma();
1626     test_fmax();
1627     test_fmin();
1628     test_hypot();
1629     test_ilogb();
1630     test_lerp();
1631     test_lgamma();
1632     test_llrint();
1633     test_llround();
1634     test_log1p();
1635     test_log2();
1636     test_logb();
1637     test_lrint();
1638     test_lround();
1639     test_nan();
1640     test_nearbyint();
1641     test_nextafter();
1642     test_nexttoward();
1643     test_remainder();
1644     test_remquo();
1645     test_rint();
1646     test_round();
1647     test_scalbln();
1648     test_scalbn();
1649     test_tgamma();
1650     test_trunc();
1651 
1652   return 0;
1653 }
1654