xref: /llvm-project/libcxx/test/std/numerics/c.math/cmath.pass.cpp (revision f642436cc213f99a90e3a4258666dd693b29d79d) 
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 #ifdef __clang__
117 #pragma clang diagnostic push
118 #pragma clang diagnostic ignored "-Wabsolute-value"
119 #endif
120     static_assert((std::is_same<decltype(std::abs((float)0)), float>::value), "");
121     static_assert((std::is_same<decltype(std::abs((double)0)), double>::value), "");
122     static_assert((std::is_same<decltype(std::abs((long double)0)), long double>::value), "");
123     static_assert((std::is_same<decltype(std::abs((int)0)), int>::value), "");
124     static_assert((std::is_same<decltype(std::abs((long)0)), long>::value), "");
125     static_assert((std::is_same<decltype(std::abs((long long)0)), long long>::value), "");
126     static_assert((std::is_same<decltype(std::abs((unsigned char)0)), int>::value), "");
127     static_assert((std::is_same<decltype(std::abs((unsigned short)0)), int>::value), "");
128     static_assert((std::is_same<decltype(std::abs((signed char)0)), int>::value), "");
129     static_assert((std::is_same<decltype(std::abs((short)0)), int>::value), "");
130     static_assert((std::is_same<decltype(std::abs((unsigned char)0)), int>::value), "");
131     static_assert((std::is_same<decltype(std::abs((char)0)), int>::value), "");
132     static_assert((std::is_same<decltype(abs(Ambiguous())), Ambiguous>::value), "");
133 
134     static_assert(!has_abs<unsigned>::value, "");
135     static_assert(!has_abs<unsigned long>::value, "");
136     static_assert(!has_abs<unsigned long long>::value, "");
137     static_assert(!has_abs<size_t>::value, "");
138 #ifdef __clang__
139 #pragma clang diagnostic pop
140 #endif
141 
142     assert(std::abs(-1.) == 1);
143 }
144 
145 
146 void test_acos()
147 {
148     static_assert((std::is_same<decltype(std::acos((float)0)), float>::value), "");
149     static_assert((std::is_same<decltype(std::acos((bool)0)), double>::value), "");
150     static_assert((std::is_same<decltype(std::acos((unsigned short)0)), double>::value), "");
151     static_assert((std::is_same<decltype(std::acos((int)0)), double>::value), "");
152     static_assert((std::is_same<decltype(std::acos((unsigned int)0)), double>::value), "");
153     static_assert((std::is_same<decltype(std::acos((long)0)), double>::value), "");
154     static_assert((std::is_same<decltype(std::acos((unsigned long)0)), double>::value), "");
155     static_assert((std::is_same<decltype(std::acos((long long)0)), double>::value), "");
156     static_assert((std::is_same<decltype(std::acos((unsigned long long)0)), double>::value), "");
157     static_assert((std::is_same<decltype(std::acos((double)0)), double>::value), "");
158     static_assert((std::is_same<decltype(std::acos((long double)0)), long double>::value), "");
159     static_assert((std::is_same<decltype(std::acosf(0)), float>::value), "");
160     static_assert((std::is_same<decltype(std::acosl(0)), long double>::value), "");
161     static_assert((std::is_same<decltype(acos(Ambiguous())), Ambiguous>::value), "");
162     assert(std::acos(1) == 0);
163 }
164 
165 void test_asin()
166 {
167     static_assert((std::is_same<decltype(std::asin((float)0)), float>::value), "");
168     static_assert((std::is_same<decltype(std::asin((bool)0)), double>::value), "");
169     static_assert((std::is_same<decltype(std::asin((unsigned short)0)), double>::value), "");
170     static_assert((std::is_same<decltype(std::asin((int)0)), double>::value), "");
171     static_assert((std::is_same<decltype(std::asin((unsigned int)0)), double>::value), "");
172     static_assert((std::is_same<decltype(std::asin((long)0)), double>::value), "");
173     static_assert((std::is_same<decltype(std::asin((unsigned long)0)), double>::value), "");
174     static_assert((std::is_same<decltype(std::asin((long long)0)), double>::value), "");
175     static_assert((std::is_same<decltype(std::asin((unsigned long long)0)), double>::value), "");
176     static_assert((std::is_same<decltype(std::asin((double)0)), double>::value), "");
177     static_assert((std::is_same<decltype(std::asin((long double)0)), long double>::value), "");
178     static_assert((std::is_same<decltype(std::asinf(0)), float>::value), "");
179     static_assert((std::is_same<decltype(std::asinl(0)), long double>::value), "");
180     static_assert((std::is_same<decltype(asin(Ambiguous())), Ambiguous>::value), "");
181     assert(std::asin(0) == 0);
182 }
183 
184 void test_atan()
185 {
186     static_assert((std::is_same<decltype(std::atan((float)0)), float>::value), "");
187     static_assert((std::is_same<decltype(std::atan((bool)0)), double>::value), "");
188     static_assert((std::is_same<decltype(std::atan((unsigned short)0)), double>::value), "");
189     static_assert((std::is_same<decltype(std::atan((int)0)), double>::value), "");
190     static_assert((std::is_same<decltype(std::atan((unsigned int)0)), double>::value), "");
191     static_assert((std::is_same<decltype(std::atan((long)0)), double>::value), "");
192     static_assert((std::is_same<decltype(std::atan((unsigned long)0)), double>::value), "");
193     static_assert((std::is_same<decltype(std::atan((long long)0)), double>::value), "");
194     static_assert((std::is_same<decltype(std::atan((unsigned long long)0)), double>::value), "");
195     static_assert((std::is_same<decltype(std::atan((double)0)), double>::value), "");
196     static_assert((std::is_same<decltype(std::atan((long double)0)), long double>::value), "");
197     static_assert((std::is_same<decltype(std::atanf(0)), float>::value), "");
198     static_assert((std::is_same<decltype(std::atanl(0)), long double>::value), "");
199     static_assert((std::is_same<decltype(atan(Ambiguous())), Ambiguous>::value), "");
200     assert(std::atan(0) == 0);
201 }
202 
203 void test_atan2()
204 {
205     static_assert((std::is_same<decltype(std::atan2((float)0, (float)0)), float>::value), "");
206     static_assert((std::is_same<decltype(std::atan2((bool)0, (float)0)), double>::value), "");
207     static_assert((std::is_same<decltype(std::atan2((unsigned short)0, (double)0)), double>::value), "");
208     static_assert((std::is_same<decltype(std::atan2((int)0, (long double)0)), long double>::value), "");
209     static_assert((std::is_same<decltype(std::atan2((float)0, (unsigned int)0)), double>::value), "");
210     static_assert((std::is_same<decltype(std::atan2((double)0, (long)0)), double>::value), "");
211     static_assert((std::is_same<decltype(std::atan2((long double)0, (unsigned long)0)), long double>::value), "");
212     static_assert((std::is_same<decltype(std::atan2((int)0, (long long)0)), double>::value), "");
213     static_assert((std::is_same<decltype(std::atan2((int)0, (unsigned long long)0)), double>::value), "");
214     static_assert((std::is_same<decltype(std::atan2((double)0, (double)0)), double>::value), "");
215     static_assert((std::is_same<decltype(std::atan2((long double)0, (long double)0)), long double>::value), "");
216     static_assert((std::is_same<decltype(std::atan2((float)0, (double)0)), double>::value), "");
217     static_assert((std::is_same<decltype(std::atan2((float)0, (long double)0)), long double>::value), "");
218     static_assert((std::is_same<decltype(std::atan2((double)0, (long double)0)), long double>::value), "");
219     static_assert((std::is_same<decltype(std::atan2f(0,0)), float>::value), "");
220     static_assert((std::is_same<decltype(std::atan2l(0,0)), long double>::value), "");
221     static_assert((std::is_same<decltype(std::atan2((int)0, (int)0)), double>::value), "");
222     static_assert((std::is_same<decltype(atan2(Ambiguous(), Ambiguous())), Ambiguous>::value), "");
223     assert(std::atan2(0,1) == 0);
224 }
225 
226 void test_ceil()
227 {
228     static_assert((std::is_same<decltype(std::ceil((float)0)), float>::value), "");
229     static_assert((std::is_same<decltype(std::ceil((bool)0)), double>::value), "");
230     static_assert((std::is_same<decltype(std::ceil((unsigned short)0)), double>::value), "");
231     static_assert((std::is_same<decltype(std::ceil((int)0)), double>::value), "");
232     static_assert((std::is_same<decltype(std::ceil((unsigned int)0)), double>::value), "");
233     static_assert((std::is_same<decltype(std::ceil((long)0)), double>::value), "");
234     static_assert((std::is_same<decltype(std::ceil((unsigned long)0)), double>::value), "");
235     static_assert((std::is_same<decltype(std::ceil((long long)0)), double>::value), "");
236     static_assert((std::is_same<decltype(std::ceil((unsigned long long)0)), double>::value), "");
237     static_assert((std::is_same<decltype(std::ceil((double)0)), double>::value), "");
238     static_assert((std::is_same<decltype(std::ceil((long double)0)), long double>::value), "");
239     static_assert((std::is_same<decltype(std::ceilf(0)), float>::value), "");
240     static_assert((std::is_same<decltype(std::ceill(0)), long double>::value), "");
241     static_assert((std::is_same<decltype(ceil(Ambiguous())), Ambiguous>::value), "");
242     assert(std::ceil(0) == 0);
243 }
244 
245 void test_cos()
246 {
247     static_assert((std::is_same<decltype(std::cos((float)0)), float>::value), "");
248     static_assert((std::is_same<decltype(std::cos((bool)0)), double>::value), "");
249     static_assert((std::is_same<decltype(std::cos((unsigned short)0)), double>::value), "");
250     static_assert((std::is_same<decltype(std::cos((int)0)), double>::value), "");
251     static_assert((std::is_same<decltype(std::cos((unsigned int)0)), double>::value), "");
252     static_assert((std::is_same<decltype(std::cos((long)0)), double>::value), "");
253     static_assert((std::is_same<decltype(std::cos((unsigned long)0)), double>::value), "");
254     static_assert((std::is_same<decltype(std::cos((long long)0)), double>::value), "");
255     static_assert((std::is_same<decltype(std::cos((unsigned long long)0)), double>::value), "");
256     static_assert((std::is_same<decltype(std::cos((double)0)), double>::value), "");
257     static_assert((std::is_same<decltype(std::cos((long double)0)), long double>::value), "");
258     static_assert((std::is_same<decltype(std::cosf(0)), float>::value), "");
259     static_assert((std::is_same<decltype(std::cosl(0)), long double>::value), "");
260     static_assert((std::is_same<decltype(cos(Ambiguous())), Ambiguous>::value), "");
261     assert(std::cos(0) == 1);
262 }
263 
264 void test_cosh()
265 {
266     static_assert((std::is_same<decltype(std::cosh((float)0)), float>::value), "");
267     static_assert((std::is_same<decltype(std::cosh((bool)0)), double>::value), "");
268     static_assert((std::is_same<decltype(std::cosh((unsigned short)0)), double>::value), "");
269     static_assert((std::is_same<decltype(std::cosh((int)0)), double>::value), "");
270     static_assert((std::is_same<decltype(std::cosh((unsigned int)0)), double>::value), "");
271     static_assert((std::is_same<decltype(std::cosh((long)0)), double>::value), "");
272     static_assert((std::is_same<decltype(std::cosh((unsigned long)0)), double>::value), "");
273     static_assert((std::is_same<decltype(std::cosh((long long)0)), double>::value), "");
274     static_assert((std::is_same<decltype(std::cosh((unsigned long long)0)), double>::value), "");
275     static_assert((std::is_same<decltype(std::cosh((double)0)), double>::value), "");
276     static_assert((std::is_same<decltype(std::cosh((long double)0)), long double>::value), "");
277     static_assert((std::is_same<decltype(std::coshf(0)), float>::value), "");
278     static_assert((std::is_same<decltype(std::coshl(0)), long double>::value), "");
279     static_assert((std::is_same<decltype(cosh(Ambiguous())), Ambiguous>::value), "");
280     assert(std::cosh(0) == 1);
281 }
282 
283 void test_exp()
284 {
285     static_assert((std::is_same<decltype(std::exp((float)0)), float>::value), "");
286     static_assert((std::is_same<decltype(std::exp((bool)0)), double>::value), "");
287     static_assert((std::is_same<decltype(std::exp((unsigned short)0)), double>::value), "");
288     static_assert((std::is_same<decltype(std::exp((int)0)), double>::value), "");
289     static_assert((std::is_same<decltype(std::exp((unsigned int)0)), double>::value), "");
290     static_assert((std::is_same<decltype(std::exp((long)0)), double>::value), "");
291     static_assert((std::is_same<decltype(std::exp((unsigned long)0)), double>::value), "");
292     static_assert((std::is_same<decltype(std::exp((long long)0)), double>::value), "");
293     static_assert((std::is_same<decltype(std::exp((unsigned long long)0)), double>::value), "");
294     static_assert((std::is_same<decltype(std::exp((double)0)), double>::value), "");
295     static_assert((std::is_same<decltype(std::exp((long double)0)), long double>::value), "");
296     static_assert((std::is_same<decltype(std::expf(0)), float>::value), "");
297     static_assert((std::is_same<decltype(std::expl(0)), long double>::value), "");
298     static_assert((std::is_same<decltype(exp(Ambiguous())), Ambiguous>::value), "");
299     assert(std::exp(0) == 1);
300 }
301 
302 void test_fabs()
303 {
304     static_assert((std::is_same<decltype(std::fabs((float)0)), float>::value), "");
305     static_assert((std::is_same<decltype(std::fabs((bool)0)), double>::value), "");
306     static_assert((std::is_same<decltype(std::fabs((unsigned short)0)), double>::value), "");
307     static_assert((std::is_same<decltype(std::fabs((int)0)), double>::value), "");
308     static_assert((std::is_same<decltype(std::fabs((unsigned int)0)), double>::value), "");
309     static_assert((std::is_same<decltype(std::fabs((long)0)), double>::value), "");
310     static_assert((std::is_same<decltype(std::fabs((unsigned long)0)), double>::value), "");
311     static_assert((std::is_same<decltype(std::fabs((long long)0)), double>::value), "");
312     static_assert((std::is_same<decltype(std::fabs((unsigned long long)0)), double>::value), "");
313     static_assert((std::is_same<decltype(std::fabs((double)0)), double>::value), "");
314     static_assert((std::is_same<decltype(std::fabs((long double)0)), long double>::value), "");
315     static_assert((std::is_same<decltype(std::fabsf(0.0f)), float>::value), "");
316     static_assert((std::is_same<decltype(std::fabsl(0.0L)), long double>::value), "");
317     static_assert((std::is_same<decltype(fabs(Ambiguous())), Ambiguous>::value), "");
318     assert(std::fabs(-1) == 1);
319 }
320 
321 void test_floor()
322 {
323     static_assert((std::is_same<decltype(std::floor((float)0)), float>::value), "");
324     static_assert((std::is_same<decltype(std::floor((bool)0)), double>::value), "");
325     static_assert((std::is_same<decltype(std::floor((unsigned short)0)), double>::value), "");
326     static_assert((std::is_same<decltype(std::floor((int)0)), double>::value), "");
327     static_assert((std::is_same<decltype(std::floor((unsigned int)0)), double>::value), "");
328     static_assert((std::is_same<decltype(std::floor((long)0)), double>::value), "");
329     static_assert((std::is_same<decltype(std::floor((unsigned long)0)), double>::value), "");
330     static_assert((std::is_same<decltype(std::floor((long long)0)), double>::value), "");
331     static_assert((std::is_same<decltype(std::floor((unsigned long long)0)), double>::value), "");
332     static_assert((std::is_same<decltype(std::floor((double)0)), double>::value), "");
333     static_assert((std::is_same<decltype(std::floor((long double)0)), long double>::value), "");
334     static_assert((std::is_same<decltype(std::floorf(0)), float>::value), "");
335     static_assert((std::is_same<decltype(std::floorl(0)), long double>::value), "");
336     static_assert((std::is_same<decltype(floor(Ambiguous())), Ambiguous>::value), "");
337     assert(std::floor(1) == 1);
338 }
339 
340 void test_fmod()
341 {
342     static_assert((std::is_same<decltype(std::fmod((float)0, (float)0)), float>::value), "");
343     static_assert((std::is_same<decltype(std::fmod((bool)0, (float)0)), double>::value), "");
344     static_assert((std::is_same<decltype(std::fmod((unsigned short)0, (double)0)), double>::value), "");
345     static_assert((std::is_same<decltype(std::fmod((int)0, (long double)0)), long double>::value), "");
346     static_assert((std::is_same<decltype(std::fmod((float)0, (unsigned int)0)), double>::value), "");
347     static_assert((std::is_same<decltype(std::fmod((double)0, (long)0)), double>::value), "");
348     static_assert((std::is_same<decltype(std::fmod((long double)0, (unsigned long)0)), long double>::value), "");
349     static_assert((std::is_same<decltype(std::fmod((int)0, (long long)0)), double>::value), "");
350     static_assert((std::is_same<decltype(std::fmod((int)0, (unsigned long long)0)), double>::value), "");
351     static_assert((std::is_same<decltype(std::fmod((double)0, (double)0)), double>::value), "");
352     static_assert((std::is_same<decltype(std::fmod((long double)0, (long double)0)), long double>::value), "");
353     static_assert((std::is_same<decltype(std::fmod((float)0, (double)0)), double>::value), "");
354     static_assert((std::is_same<decltype(std::fmod((float)0, (long double)0)), long double>::value), "");
355     static_assert((std::is_same<decltype(std::fmod((double)0, (long double)0)), long double>::value), "");
356     static_assert((std::is_same<decltype(std::fmodf(0,0)), float>::value), "");
357     static_assert((std::is_same<decltype(std::fmodl(0,0)), long double>::value), "");
358     static_assert((std::is_same<decltype(std::fmod((int)0, (int)0)), double>::value), "");
359     static_assert((std::is_same<decltype(fmod(Ambiguous(), Ambiguous())), Ambiguous>::value), "");
360     assert(std::fmod(1.5,1) == .5);
361 }
362 
363 void test_frexp()
364 {
365     int ip;
366     static_assert((std::is_same<decltype(std::frexp((float)0, &ip)), float>::value), "");
367     static_assert((std::is_same<decltype(std::frexp((bool)0, &ip)), double>::value), "");
368     static_assert((std::is_same<decltype(std::frexp((unsigned short)0, &ip)), double>::value), "");
369     static_assert((std::is_same<decltype(std::frexp((int)0, &ip)), double>::value), "");
370     static_assert((std::is_same<decltype(std::frexp((unsigned int)0, &ip)), double>::value), "");
371     static_assert((std::is_same<decltype(std::frexp((long)0, &ip)), double>::value), "");
372     static_assert((std::is_same<decltype(std::frexp((unsigned long)0, &ip)), double>::value), "");
373     static_assert((std::is_same<decltype(std::frexp((long long)0, &ip)), double>::value), "");
374     static_assert((std::is_same<decltype(std::frexp((unsigned long long)0, &ip)), double>::value), "");
375     static_assert((std::is_same<decltype(std::frexp((double)0, &ip)), double>::value), "");
376     static_assert((std::is_same<decltype(std::frexp((long double)0, &ip)), long double>::value), "");
377     static_assert((std::is_same<decltype(std::frexpf(0, &ip)), float>::value), "");
378     static_assert((std::is_same<decltype(std::frexpl(0, &ip)), long double>::value), "");
379     static_assert((std::is_same<decltype(frexp(Ambiguous(), &ip)), Ambiguous>::value), "");
380     assert(std::frexp(0, &ip) == 0);
381 }
382 
383 void test_ldexp()
384 {
385     int ip = 1;
386     static_assert((std::is_same<decltype(std::ldexp((float)0, ip)), float>::value), "");
387     static_assert((std::is_same<decltype(std::ldexp((bool)0, ip)), double>::value), "");
388     static_assert((std::is_same<decltype(std::ldexp((unsigned short)0, ip)), double>::value), "");
389     static_assert((std::is_same<decltype(std::ldexp((int)0, ip)), double>::value), "");
390     static_assert((std::is_same<decltype(std::ldexp((unsigned int)0, ip)), double>::value), "");
391     static_assert((std::is_same<decltype(std::ldexp((long)0, ip)), double>::value), "");
392     static_assert((std::is_same<decltype(std::ldexp((unsigned long)0, ip)), double>::value), "");
393     static_assert((std::is_same<decltype(std::ldexp((long long)0, ip)), double>::value), "");
394     static_assert((std::is_same<decltype(std::ldexp((unsigned long long)0, ip)), double>::value), "");
395     static_assert((std::is_same<decltype(std::ldexp((double)0, ip)), double>::value), "");
396     static_assert((std::is_same<decltype(std::ldexp((long double)0, ip)), long double>::value), "");
397     static_assert((std::is_same<decltype(std::ldexpf(0, ip)), float>::value), "");
398     static_assert((std::is_same<decltype(std::ldexpl(0, ip)), long double>::value), "");
399     static_assert((std::is_same<decltype(ldexp(Ambiguous(), ip)), Ambiguous>::value), "");
400     assert(std::ldexp(1, ip) == 2);
401 }
402 
403 void test_log()
404 {
405     static_assert((std::is_same<decltype(std::log((float)0)), float>::value), "");
406     static_assert((std::is_same<decltype(std::log((bool)0)), double>::value), "");
407     static_assert((std::is_same<decltype(std::log((unsigned short)0)), double>::value), "");
408     static_assert((std::is_same<decltype(std::log((int)0)), double>::value), "");
409     static_assert((std::is_same<decltype(std::log((unsigned int)0)), double>::value), "");
410     static_assert((std::is_same<decltype(std::log((long)0)), double>::value), "");
411     static_assert((std::is_same<decltype(std::log((unsigned long)0)), double>::value), "");
412     static_assert((std::is_same<decltype(std::log((long long)0)), double>::value), "");
413     static_assert((std::is_same<decltype(std::log((unsigned long long)0)), double>::value), "");
414     static_assert((std::is_same<decltype(std::log((double)0)), double>::value), "");
415     static_assert((std::is_same<decltype(std::log((long double)0)), long double>::value), "");
416     static_assert((std::is_same<decltype(std::logf(0)), float>::value), "");
417     static_assert((std::is_same<decltype(std::logl(0)), long double>::value), "");
418     static_assert((std::is_same<decltype(log(Ambiguous())), Ambiguous>::value), "");
419     assert(std::log(1) == 0);
420 }
421 
422 void test_log10()
423 {
424     static_assert((std::is_same<decltype(std::log10((float)0)), float>::value), "");
425     static_assert((std::is_same<decltype(std::log10((bool)0)), double>::value), "");
426     static_assert((std::is_same<decltype(std::log10((unsigned short)0)), double>::value), "");
427     static_assert((std::is_same<decltype(std::log10((int)0)), double>::value), "");
428     static_assert((std::is_same<decltype(std::log10((unsigned int)0)), double>::value), "");
429     static_assert((std::is_same<decltype(std::log10((long)0)), double>::value), "");
430     static_assert((std::is_same<decltype(std::log10((unsigned long)0)), double>::value), "");
431     static_assert((std::is_same<decltype(std::log10((long long)0)), double>::value), "");
432     static_assert((std::is_same<decltype(std::log10((unsigned long long)0)), double>::value), "");
433     static_assert((std::is_same<decltype(std::log10((double)0)), double>::value), "");
434     static_assert((std::is_same<decltype(std::log10((long double)0)), long double>::value), "");
435     static_assert((std::is_same<decltype(std::log10f(0)), float>::value), "");
436     static_assert((std::is_same<decltype(std::log10l(0)), long double>::value), "");
437     static_assert((std::is_same<decltype(log10(Ambiguous())), Ambiguous>::value), "");
438     assert(std::log10(1) == 0);
439 }
440 
441 void test_modf()
442 {
443     static_assert((std::is_same<decltype(std::modf((float)0, (float*)0)), float>::value), "");
444     static_assert((std::is_same<decltype(std::modf((double)0, (double*)0)), double>::value), "");
445     static_assert((std::is_same<decltype(std::modf((long double)0, (long double*)0)), long double>::value), "");
446     static_assert((std::is_same<decltype(std::modff(0, (float*)0)), float>::value), "");
447     static_assert((std::is_same<decltype(std::modfl(0, (long double*)0)), long double>::value), "");
448     static_assert((std::is_same<decltype(modf(Ambiguous(), (Ambiguous*)0)), Ambiguous>::value), "");
449     double i;
450     assert(std::modf(1., &i) == 0);
451 }
452 
453 void test_pow()
454 {
455     static_assert((std::is_same<decltype(std::pow((float)0, (float)0)), float>::value), "");
456     static_assert((std::is_same<decltype(std::pow((bool)0, (float)0)), double>::value), "");
457     static_assert((std::is_same<decltype(std::pow((unsigned short)0, (double)0)), double>::value), "");
458     static_assert((std::is_same<decltype(std::pow((int)0, (long double)0)), long double>::value), "");
459     static_assert((std::is_same<decltype(std::pow((float)0, (unsigned int)0)), double>::value), "");
460     static_assert((std::is_same<decltype(std::pow((double)0, (long)0)), double>::value), "");
461     static_assert((std::is_same<decltype(std::pow((long double)0, (unsigned long)0)), long double>::value), "");
462     static_assert((std::is_same<decltype(std::pow((int)0, (long long)0)), double>::value), "");
463     static_assert((std::is_same<decltype(std::pow((int)0, (unsigned long long)0)), double>::value), "");
464     static_assert((std::is_same<decltype(std::pow((double)0, (double)0)), double>::value), "");
465     static_assert((std::is_same<decltype(std::pow((long double)0, (long double)0)), long double>::value), "");
466     static_assert((std::is_same<decltype(std::pow((float)0, (double)0)), double>::value), "");
467     static_assert((std::is_same<decltype(std::pow((float)0, (long double)0)), long double>::value), "");
468     static_assert((std::is_same<decltype(std::pow((double)0, (long double)0)), long double>::value), "");
469     static_assert((std::is_same<decltype(std::powf(0,0)), float>::value), "");
470     static_assert((std::is_same<decltype(std::powl(0,0)), long double>::value), "");
471     static_assert((std::is_same<decltype(std::pow((int)0, (int)0)), double>::value), "");
472 //     static_assert((std::is_same<decltype(std::pow(Value<int>(), (int)0)), double>::value), "");
473 //     static_assert((std::is_same<decltype(std::pow(Value<long double>(), (float)0)), long double>::value), "");
474 //     static_assert((std::is_same<decltype(std::pow((float) 0, Value<float>())), float>::value), "");
475     static_assert((std::is_same<decltype(pow(Ambiguous(), Ambiguous())), Ambiguous>::value), "");
476     assert(std::pow(1,1) == 1);
477 //     assert(std::pow(Value<int,1>(), Value<float,1>())  == 1);
478 //     assert(std::pow(1.0f, Value<double,1>()) == 1);
479 //     assert(std::pow(1.0, Value<int,1>()) == 1);
480 //     assert(std::pow(Value<long double,1>(), 1LL) == 1);
481 }
482 
483 void test_sin()
484 {
485     static_assert((std::is_same<decltype(std::sin((float)0)), float>::value), "");
486     static_assert((std::is_same<decltype(std::sin((bool)0)), double>::value), "");
487     static_assert((std::is_same<decltype(std::sin((unsigned short)0)), double>::value), "");
488     static_assert((std::is_same<decltype(std::sin((int)0)), double>::value), "");
489     static_assert((std::is_same<decltype(std::sin((unsigned int)0)), double>::value), "");
490     static_assert((std::is_same<decltype(std::sin((long)0)), double>::value), "");
491     static_assert((std::is_same<decltype(std::sin((unsigned long)0)), double>::value), "");
492     static_assert((std::is_same<decltype(std::sin((long long)0)), double>::value), "");
493     static_assert((std::is_same<decltype(std::sin((unsigned long long)0)), double>::value), "");
494     static_assert((std::is_same<decltype(std::sin((double)0)), double>::value), "");
495     static_assert((std::is_same<decltype(std::sin((long double)0)), long double>::value), "");
496     static_assert((std::is_same<decltype(std::sinf(0)), float>::value), "");
497     static_assert((std::is_same<decltype(std::sinl(0)), long double>::value), "");
498     static_assert((std::is_same<decltype(sin(Ambiguous())), Ambiguous>::value), "");
499     assert(std::sin(0) == 0);
500 }
501 
502 void test_sinh()
503 {
504     static_assert((std::is_same<decltype(std::sinh((float)0)), float>::value), "");
505     static_assert((std::is_same<decltype(std::sinh((bool)0)), double>::value), "");
506     static_assert((std::is_same<decltype(std::sinh((unsigned short)0)), double>::value), "");
507     static_assert((std::is_same<decltype(std::sinh((int)0)), double>::value), "");
508     static_assert((std::is_same<decltype(std::sinh((unsigned int)0)), double>::value), "");
509     static_assert((std::is_same<decltype(std::sinh((long)0)), double>::value), "");
510     static_assert((std::is_same<decltype(std::sinh((unsigned long)0)), double>::value), "");
511     static_assert((std::is_same<decltype(std::sinh((long long)0)), double>::value), "");
512     static_assert((std::is_same<decltype(std::sinh((unsigned long long)0)), double>::value), "");
513     static_assert((std::is_same<decltype(std::sinh((double)0)), double>::value), "");
514     static_assert((std::is_same<decltype(std::sinh((long double)0)), long double>::value), "");
515     static_assert((std::is_same<decltype(std::sinhf(0)), float>::value), "");
516     static_assert((std::is_same<decltype(std::sinhl(0)), long double>::value), "");
517     static_assert((std::is_same<decltype(sinh(Ambiguous())), Ambiguous>::value), "");
518     assert(std::sinh(0) == 0);
519 }
520 
521 void test_sqrt()
522 {
523     static_assert((std::is_same<decltype(std::sqrt((float)0)), float>::value), "");
524     static_assert((std::is_same<decltype(std::sqrt((bool)0)), double>::value), "");
525     static_assert((std::is_same<decltype(std::sqrt((unsigned short)0)), double>::value), "");
526     static_assert((std::is_same<decltype(std::sqrt((int)0)), double>::value), "");
527     static_assert((std::is_same<decltype(std::sqrt((unsigned int)0)), double>::value), "");
528     static_assert((std::is_same<decltype(std::sqrt((long)0)), double>::value), "");
529     static_assert((std::is_same<decltype(std::sqrt((unsigned long)0)), double>::value), "");
530     static_assert((std::is_same<decltype(std::sqrt((long long)0)), double>::value), "");
531     static_assert((std::is_same<decltype(std::sqrt((unsigned long long)0)), double>::value), "");
532     static_assert((std::is_same<decltype(std::sqrt((double)0)), double>::value), "");
533     static_assert((std::is_same<decltype(std::sqrt((long double)0)), long double>::value), "");
534     static_assert((std::is_same<decltype(std::sqrtf(0)), float>::value), "");
535     static_assert((std::is_same<decltype(std::sqrtl(0)), long double>::value), "");
536     static_assert((std::is_same<decltype(sqrt(Ambiguous())), Ambiguous>::value), "");
537     assert(std::sqrt(4) == 2);
538 }
539 
540 void test_tan()
541 {
542     static_assert((std::is_same<decltype(std::tan((float)0)), float>::value), "");
543     static_assert((std::is_same<decltype(std::tan((bool)0)), double>::value), "");
544     static_assert((std::is_same<decltype(std::tan((unsigned short)0)), double>::value), "");
545     static_assert((std::is_same<decltype(std::tan((int)0)), double>::value), "");
546     static_assert((std::is_same<decltype(std::tan((unsigned int)0)), double>::value), "");
547     static_assert((std::is_same<decltype(std::tan((long)0)), double>::value), "");
548     static_assert((std::is_same<decltype(std::tan((unsigned long)0)), double>::value), "");
549     static_assert((std::is_same<decltype(std::tan((long long)0)), double>::value), "");
550     static_assert((std::is_same<decltype(std::tan((unsigned long long)0)), double>::value), "");
551     static_assert((std::is_same<decltype(std::tan((double)0)), double>::value), "");
552     static_assert((std::is_same<decltype(std::tan((long double)0)), long double>::value), "");
553     static_assert((std::is_same<decltype(std::tanf(0)), float>::value), "");
554     static_assert((std::is_same<decltype(std::tanl(0)), long double>::value), "");
555     static_assert((std::is_same<decltype(tan(Ambiguous())), Ambiguous>::value), "");
556     assert(std::tan(0) == 0);
557 }
558 
559 void test_tanh()
560 {
561     static_assert((std::is_same<decltype(std::tanh((float)0)), float>::value), "");
562     static_assert((std::is_same<decltype(std::tanh((bool)0)), double>::value), "");
563     static_assert((std::is_same<decltype(std::tanh((unsigned short)0)), double>::value), "");
564     static_assert((std::is_same<decltype(std::tanh((int)0)), double>::value), "");
565     static_assert((std::is_same<decltype(std::tanh((unsigned int)0)), double>::value), "");
566     static_assert((std::is_same<decltype(std::tanh((long)0)), double>::value), "");
567     static_assert((std::is_same<decltype(std::tanh((unsigned long)0)), double>::value), "");
568     static_assert((std::is_same<decltype(std::tanh((long long)0)), double>::value), "");
569     static_assert((std::is_same<decltype(std::tanh((unsigned long long)0)), double>::value), "");
570     static_assert((std::is_same<decltype(std::tanh((double)0)), double>::value), "");
571     static_assert((std::is_same<decltype(std::tanh((long double)0)), long double>::value), "");
572     static_assert((std::is_same<decltype(std::tanhf(0)), float>::value), "");
573     static_assert((std::is_same<decltype(std::tanhl(0)), long double>::value), "");
574     static_assert((std::is_same<decltype(tanh(Ambiguous())), Ambiguous>::value), "");
575     assert(std::tanh(0) == 0);
576 }
577 
578 void test_signbit()
579 {
580 #ifdef signbit
581 #error signbit defined
582 #endif
583     static_assert((std::is_same<decltype(std::signbit((float)0)), bool>::value), "");
584     static_assert((std::is_same<decltype(std::signbit((double)0)), bool>::value), "");
585     static_assert((std::is_same<decltype(std::signbit(0)), bool>::value), "");
586     static_assert((std::is_same<decltype(std::signbit((long double)0)), bool>::value), "");
587     static_assert((std::is_same<decltype(signbit(Ambiguous())), Ambiguous>::value), "");
588     assert(std::signbit(-1.0) == true);
589     assert(std::signbit(0u) == false);
590     assert(std::signbit(std::numeric_limits<unsigned>::max()) == false);
591     assert(std::signbit(0) == false);
592     assert(std::signbit(1) == false);
593     assert(std::signbit(-1) == true);
594     assert(std::signbit(std::numeric_limits<int>::max()) == false);
595     assert(std::signbit(std::numeric_limits<int>::min()) == true);
596 }
597 
598 void test_fpclassify()
599 {
600 #ifdef fpclassify
601 #error fpclassify defined
602 #endif
603     static_assert((std::is_same<decltype(std::fpclassify((float)0)), int>::value), "");
604     static_assert((std::is_same<decltype(std::fpclassify((double)0)), int>::value), "");
605     static_assert((std::is_same<decltype(std::fpclassify(0)), int>::value), "");
606     static_assert((std::is_same<decltype(std::fpclassify((long double)0)), int>::value), "");
607     static_assert((std::is_same<decltype(fpclassify(Ambiguous())), Ambiguous>::value), "");
608     assert(std::fpclassify(-1.0) == FP_NORMAL);
609     assert(std::fpclassify(0) == FP_ZERO);
610     assert(std::fpclassify(1) == FP_NORMAL);
611     assert(std::fpclassify(-1) == FP_NORMAL);
612     assert(std::fpclassify(std::numeric_limits<int>::max()) == FP_NORMAL);
613     assert(std::fpclassify(std::numeric_limits<int>::min()) == FP_NORMAL);
614 }
615 
616 void test_isfinite()
617 {
618 #ifdef isfinite
619 #error isfinite defined
620 #endif
621     static_assert((std::is_same<decltype(std::isfinite((float)0)), bool>::value), "");
622     static_assert((std::is_same<decltype(std::isfinite((double)0)), bool>::value), "");
623     static_assert((std::is_same<decltype(std::isfinite(0)), bool>::value), "");
624     static_assert((std::is_same<decltype(std::isfinite((long double)0)), bool>::value), "");
625     static_assert((std::is_same<decltype(isfinite(Ambiguous())), Ambiguous>::value), "");
626     assert(std::isfinite(-1.0) == true);
627     assert(std::isfinite(0) == true);
628     assert(std::isfinite(1) == true);
629     assert(std::isfinite(-1) == true);
630     assert(std::isfinite(std::numeric_limits<int>::max()) == true);
631     assert(std::isfinite(std::numeric_limits<int>::min()) == true);
632 }
633 
634 void test_isnormal()
635 {
636 #ifdef isnormal
637 #error isnormal defined
638 #endif
639     static_assert((std::is_same<decltype(std::isnormal((float)0)), bool>::value), "");
640     static_assert((std::is_same<decltype(std::isnormal((double)0)), bool>::value), "");
641     static_assert((std::is_same<decltype(std::isnormal(0)), bool>::value), "");
642     static_assert((std::is_same<decltype(std::isnormal((long double)0)), bool>::value), "");
643     static_assert((std::is_same<decltype(isnormal(Ambiguous())), Ambiguous>::value), "");
644     assert(std::isnormal(-1.0) == true);
645     assert(std::isnormal(0) == false);
646     assert(std::isnormal(1) == true);
647     assert(std::isnormal(-1) == true);
648     assert(std::isnormal(std::numeric_limits<int>::max()) == true);
649     assert(std::isnormal(std::numeric_limits<int>::min()) == true);
650 }
651 
652 void test_isgreater()
653 {
654 #ifdef isgreater
655 #error isgreater defined
656 #endif
657     static_assert((std::is_same<decltype(std::isgreater((float)0, (float)0)), bool>::value), "");
658     static_assert((std::is_same<decltype(std::isgreater((float)0, (double)0)), bool>::value), "");
659     static_assert((std::is_same<decltype(std::isgreater((float)0, (long double)0)), bool>::value), "");
660     static_assert((std::is_same<decltype(std::isgreater((double)0, (float)0)), bool>::value), "");
661     static_assert((std::is_same<decltype(std::isgreater((double)0, (double)0)), bool>::value), "");
662     static_assert((std::is_same<decltype(std::isgreater(0, (double)0)), bool>::value), "");
663     static_assert((std::is_same<decltype(std::isgreater((double)0, (long double)0)), bool>::value), "");
664     static_assert((std::is_same<decltype(std::isgreater((long double)0, (float)0)), bool>::value), "");
665     static_assert((std::is_same<decltype(std::isgreater((long double)0, (double)0)), bool>::value), "");
666     static_assert((std::is_same<decltype(std::isgreater((long double)0, (long double)0)), bool>::value), "");
667     static_assert((std::is_same<decltype(isgreater(Ambiguous(), Ambiguous())), Ambiguous>::value), "");
668     assert(std::isgreater(-1.0, 0.F) == false);
669 }
670 
671 void test_isgreaterequal()
672 {
673 #ifdef isgreaterequal
674 #error isgreaterequal defined
675 #endif
676     static_assert((std::is_same<decltype(std::isgreaterequal((float)0, (float)0)), bool>::value), "");
677     static_assert((std::is_same<decltype(std::isgreaterequal((float)0, (double)0)), bool>::value), "");
678     static_assert((std::is_same<decltype(std::isgreaterequal((float)0, (long double)0)), bool>::value), "");
679     static_assert((std::is_same<decltype(std::isgreaterequal((double)0, (float)0)), bool>::value), "");
680     static_assert((std::is_same<decltype(std::isgreaterequal((double)0, (double)0)), bool>::value), "");
681     static_assert((std::is_same<decltype(std::isgreaterequal(0, (double)0)), bool>::value), "");
682     static_assert((std::is_same<decltype(std::isgreaterequal((double)0, (long double)0)), bool>::value), "");
683     static_assert((std::is_same<decltype(std::isgreaterequal((long double)0, (float)0)), bool>::value), "");
684     static_assert((std::is_same<decltype(std::isgreaterequal((long double)0, (double)0)), bool>::value), "");
685     static_assert((std::is_same<decltype(std::isgreaterequal((long double)0, (long double)0)), bool>::value), "");
686     static_assert((std::is_same<decltype(isgreaterequal(Ambiguous(), Ambiguous())), Ambiguous>::value), "");
687     assert(std::isgreaterequal(-1.0, 0.F) == false);
688 }
689 
690 void test_isinf()
691 {
692 #ifdef isinf
693 #error isinf defined
694 #endif
695     static_assert((std::is_same<decltype(std::isinf((float)0)), bool>::value), "");
696 
697     typedef decltype(std::isinf((double)0)) DoubleRetType;
698 #if !defined(__linux__) || defined(__clang__)
699     static_assert((std::is_same<DoubleRetType, bool>::value), "");
700 #else
701     // GLIBC < 2.23 defines 'isinf(double)' with a return type of 'int' in
702     // all C++ dialects. The test should tolerate this when libc++ can't work
703     // around it.
704     // See: https://sourceware.org/bugzilla/show_bug.cgi?id=19439
705     static_assert((std::is_same<DoubleRetType, bool>::value
706                 || std::is_same<DoubleRetType, int>::value), "");
707 #endif
708 
709     static_assert((std::is_same<decltype(std::isinf(0)), bool>::value), "");
710     static_assert((std::is_same<decltype(std::isinf((long double)0)), bool>::value), "");
711     assert(std::isinf(-1.0) == false);
712     assert(std::isinf(0) == false);
713     assert(std::isinf(1) == false);
714     assert(std::isinf(-1) == false);
715     assert(std::isinf(std::numeric_limits<int>::max()) == false);
716     assert(std::isinf(std::numeric_limits<int>::min()) == false);
717 }
718 
719 void test_isless()
720 {
721 #ifdef isless
722 #error isless defined
723 #endif
724     static_assert((std::is_same<decltype(std::isless((float)0, (float)0)), bool>::value), "");
725     static_assert((std::is_same<decltype(std::isless((float)0, (double)0)), bool>::value), "");
726     static_assert((std::is_same<decltype(std::isless((float)0, (long double)0)), bool>::value), "");
727     static_assert((std::is_same<decltype(std::isless((double)0, (float)0)), bool>::value), "");
728     static_assert((std::is_same<decltype(std::isless((double)0, (double)0)), bool>::value), "");
729     static_assert((std::is_same<decltype(std::isless(0, (double)0)), bool>::value), "");
730     static_assert((std::is_same<decltype(std::isless((double)0, (long double)0)), bool>::value), "");
731     static_assert((std::is_same<decltype(std::isless((long double)0, (float)0)), bool>::value), "");
732     static_assert((std::is_same<decltype(std::isless((long double)0, (double)0)), bool>::value), "");
733     static_assert((std::is_same<decltype(std::isless((long double)0, (long double)0)), bool>::value), "");
734     static_assert((std::is_same<decltype(isless(Ambiguous(), Ambiguous())), Ambiguous>::value), "");
735     assert(std::isless(-1.0, 0.F) == true);
736 }
737 
738 void test_islessequal()
739 {
740 #ifdef islessequal
741 #error islessequal defined
742 #endif
743     static_assert((std::is_same<decltype(std::islessequal((float)0, (float)0)), bool>::value), "");
744     static_assert((std::is_same<decltype(std::islessequal((float)0, (double)0)), bool>::value), "");
745     static_assert((std::is_same<decltype(std::islessequal((float)0, (long double)0)), bool>::value), "");
746     static_assert((std::is_same<decltype(std::islessequal((double)0, (float)0)), bool>::value), "");
747     static_assert((std::is_same<decltype(std::islessequal((double)0, (double)0)), bool>::value), "");
748     static_assert((std::is_same<decltype(std::islessequal(0, (double)0)), bool>::value), "");
749     static_assert((std::is_same<decltype(std::islessequal((double)0, (long double)0)), bool>::value), "");
750     static_assert((std::is_same<decltype(std::islessequal((long double)0, (float)0)), bool>::value), "");
751     static_assert((std::is_same<decltype(std::islessequal((long double)0, (double)0)), bool>::value), "");
752     static_assert((std::is_same<decltype(std::islessequal((long double)0, (long double)0)), bool>::value), "");
753     static_assert((std::is_same<decltype(islessequal(Ambiguous(), Ambiguous())), Ambiguous>::value), "");
754     assert(std::islessequal(-1.0, 0.F) == true);
755 }
756 
757 void test_islessgreater()
758 {
759 #ifdef islessgreater
760 #error islessgreater defined
761 #endif
762     static_assert((std::is_same<decltype(std::islessgreater((float)0, (float)0)), bool>::value), "");
763     static_assert((std::is_same<decltype(std::islessgreater((float)0, (double)0)), bool>::value), "");
764     static_assert((std::is_same<decltype(std::islessgreater((float)0, (long double)0)), bool>::value), "");
765     static_assert((std::is_same<decltype(std::islessgreater((double)0, (float)0)), bool>::value), "");
766     static_assert((std::is_same<decltype(std::islessgreater((double)0, (double)0)), bool>::value), "");
767     static_assert((std::is_same<decltype(std::islessgreater(0, (double)0)), bool>::value), "");
768     static_assert((std::is_same<decltype(std::islessgreater((double)0, (long double)0)), bool>::value), "");
769     static_assert((std::is_same<decltype(std::islessgreater((long double)0, (float)0)), bool>::value), "");
770     static_assert((std::is_same<decltype(std::islessgreater((long double)0, (double)0)), bool>::value), "");
771     static_assert((std::is_same<decltype(std::islessgreater((long double)0, (long double)0)), bool>::value), "");
772     static_assert((std::is_same<decltype(islessgreater(Ambiguous(), Ambiguous())), Ambiguous>::value), "");
773     assert(std::islessgreater(-1.0, 0.F) == true);
774 }
775 
776 void test_isnan()
777 {
778 #ifdef isnan
779 #error isnan defined
780 #endif
781     static_assert((std::is_same<decltype(std::isnan((float)0)), bool>::value), "");
782 
783     typedef decltype(std::isnan((double)0)) DoubleRetType;
784 #if !defined(__linux__) || defined(__clang__)
785     static_assert((std::is_same<DoubleRetType, bool>::value), "");
786 #else
787     // GLIBC < 2.23 defines 'isinf(double)' with a return type of 'int' in
788     // all C++ dialects. The test should tolerate this when libc++ can't work
789     // around it.
790     // See: https://sourceware.org/bugzilla/show_bug.cgi?id=19439
791     static_assert((std::is_same<DoubleRetType, bool>::value
792                 || std::is_same<DoubleRetType, int>::value), "");
793 #endif
794 
795     static_assert((std::is_same<decltype(std::isnan(0)), bool>::value), "");
796     static_assert((std::is_same<decltype(std::isnan((long double)0)), bool>::value), "");
797     assert(std::isnan(-1.0) == false);
798     assert(std::isnan(0) == false);
799     assert(std::isnan(1) == false);
800     assert(std::isnan(-1) == false);
801     assert(std::isnan(std::numeric_limits<int>::max()) == false);
802     assert(std::isnan(std::numeric_limits<int>::min()) == false);
803 }
804 
805 void test_isunordered()
806 {
807 #ifdef isunordered
808 #error isunordered defined
809 #endif
810     static_assert((std::is_same<decltype(std::isunordered((float)0, (float)0)), bool>::value), "");
811     static_assert((std::is_same<decltype(std::isunordered((float)0, (double)0)), bool>::value), "");
812     static_assert((std::is_same<decltype(std::isunordered((float)0, (long double)0)), bool>::value), "");
813     static_assert((std::is_same<decltype(std::isunordered((double)0, (float)0)), bool>::value), "");
814     static_assert((std::is_same<decltype(std::isunordered((double)0, (double)0)), bool>::value), "");
815     static_assert((std::is_same<decltype(std::isunordered(0, (double)0)), bool>::value), "");
816     static_assert((std::is_same<decltype(std::isunordered((double)0, (long double)0)), bool>::value), "");
817     static_assert((std::is_same<decltype(std::isunordered((long double)0, (float)0)), bool>::value), "");
818     static_assert((std::is_same<decltype(std::isunordered((long double)0, (double)0)), bool>::value), "");
819     static_assert((std::is_same<decltype(std::isunordered((long double)0, (long double)0)), bool>::value), "");
820     static_assert((std::is_same<decltype(isunordered(Ambiguous(), Ambiguous())), Ambiguous>::value), "");
821     assert(std::isunordered(-1.0, 0.F) == false);
822 }
823 
824 void test_acosh()
825 {
826     static_assert((std::is_same<decltype(std::acosh((float)0)), float>::value), "");
827     static_assert((std::is_same<decltype(std::acosh((bool)0)), double>::value), "");
828     static_assert((std::is_same<decltype(std::acosh((unsigned short)0)), double>::value), "");
829     static_assert((std::is_same<decltype(std::acosh((int)0)), double>::value), "");
830     static_assert((std::is_same<decltype(std::acosh((unsigned int)0)), double>::value), "");
831     static_assert((std::is_same<decltype(std::acosh((long)0)), double>::value), "");
832     static_assert((std::is_same<decltype(std::acosh((unsigned long)0)), double>::value), "");
833     static_assert((std::is_same<decltype(std::acosh((long long)0)), double>::value), "");
834     static_assert((std::is_same<decltype(std::acosh((unsigned long long)0)), double>::value), "");
835     static_assert((std::is_same<decltype(std::acosh((double)0)), double>::value), "");
836     static_assert((std::is_same<decltype(std::acosh((long double)0)), long double>::value), "");
837     static_assert((std::is_same<decltype(std::acoshf(0)), float>::value), "");
838     static_assert((std::is_same<decltype(std::acoshl(0)), long double>::value), "");
839     static_assert((std::is_same<decltype(acosh(Ambiguous())), Ambiguous>::value), "");
840     assert(std::acosh(1) == 0);
841 }
842 
843 void test_asinh()
844 {
845     static_assert((std::is_same<decltype(std::asinh((float)0)), float>::value), "");
846     static_assert((std::is_same<decltype(std::asinh((bool)0)), double>::value), "");
847     static_assert((std::is_same<decltype(std::asinh((unsigned short)0)), double>::value), "");
848     static_assert((std::is_same<decltype(std::asinh((int)0)), double>::value), "");
849     static_assert((std::is_same<decltype(std::asinh((unsigned int)0)), double>::value), "");
850     static_assert((std::is_same<decltype(std::asinh((long)0)), double>::value), "");
851     static_assert((std::is_same<decltype(std::asinh((unsigned long)0)), double>::value), "");
852     static_assert((std::is_same<decltype(std::asinh((long long)0)), double>::value), "");
853     static_assert((std::is_same<decltype(std::asinh((unsigned long long)0)), double>::value), "");
854     static_assert((std::is_same<decltype(std::asinh((double)0)), double>::value), "");
855     static_assert((std::is_same<decltype(std::asinh((long double)0)), long double>::value), "");
856     static_assert((std::is_same<decltype(std::asinhf(0)), float>::value), "");
857     static_assert((std::is_same<decltype(std::asinhl(0)), long double>::value), "");
858     static_assert((std::is_same<decltype(asinh(Ambiguous())), Ambiguous>::value), "");
859     assert(std::asinh(0) == 0);
860 }
861 
862 void test_atanh()
863 {
864     static_assert((std::is_same<decltype(std::atanh((float)0)), float>::value), "");
865     static_assert((std::is_same<decltype(std::atanh((bool)0)), double>::value), "");
866     static_assert((std::is_same<decltype(std::atanh((unsigned short)0)), double>::value), "");
867     static_assert((std::is_same<decltype(std::atanh((int)0)), double>::value), "");
868     static_assert((std::is_same<decltype(std::atanh((unsigned int)0)), double>::value), "");
869     static_assert((std::is_same<decltype(std::atanh((long)0)), double>::value), "");
870     static_assert((std::is_same<decltype(std::atanh((unsigned long)0)), double>::value), "");
871     static_assert((std::is_same<decltype(std::atanh((long long)0)), double>::value), "");
872     static_assert((std::is_same<decltype(std::atanh((unsigned long long)0)), double>::value), "");
873     static_assert((std::is_same<decltype(std::atanh((double)0)), double>::value), "");
874     static_assert((std::is_same<decltype(std::atanh((long double)0)), long double>::value), "");
875     static_assert((std::is_same<decltype(std::atanhf(0)), float>::value), "");
876     static_assert((std::is_same<decltype(std::atanhl(0)), long double>::value), "");
877     static_assert((std::is_same<decltype(atanh(Ambiguous())), Ambiguous>::value), "");
878     assert(std::atanh(0) == 0);
879 }
880 
881 void test_cbrt()
882 {
883     static_assert((std::is_same<decltype(std::cbrt((float)0)), float>::value), "");
884     static_assert((std::is_same<decltype(std::cbrt((bool)0)), double>::value), "");
885     static_assert((std::is_same<decltype(std::cbrt((unsigned short)0)), double>::value), "");
886     static_assert((std::is_same<decltype(std::cbrt((int)0)), double>::value), "");
887     static_assert((std::is_same<decltype(std::cbrt((unsigned int)0)), double>::value), "");
888     static_assert((std::is_same<decltype(std::cbrt((long)0)), double>::value), "");
889     static_assert((std::is_same<decltype(std::cbrt((unsigned long)0)), double>::value), "");
890     static_assert((std::is_same<decltype(std::cbrt((long long)0)), double>::value), "");
891     static_assert((std::is_same<decltype(std::cbrt((unsigned long long)0)), double>::value), "");
892     static_assert((std::is_same<decltype(std::cbrt((double)0)), double>::value), "");
893     static_assert((std::is_same<decltype(std::cbrt((long double)0)), long double>::value), "");
894     static_assert((std::is_same<decltype(std::cbrtf(0)), float>::value), "");
895     static_assert((std::is_same<decltype(std::cbrtl(0)), long double>::value), "");
896     static_assert((std::is_same<decltype(cbrt(Ambiguous())), Ambiguous>::value), "");
897     assert(truncate_fp(std::cbrt(1)) == 1);
898 }
899 
900 void test_copysign()
901 {
902     static_assert((std::is_same<decltype(std::copysign((float)0, (float)0)), float>::value), "");
903     static_assert((std::is_same<decltype(std::copysign((bool)0, (float)0)), double>::value), "");
904     static_assert((std::is_same<decltype(std::copysign((unsigned short)0, (double)0)), double>::value), "");
905     static_assert((std::is_same<decltype(std::copysign((int)0, (long double)0)), long double>::value), "");
906     static_assert((std::is_same<decltype(std::copysign((float)0, (unsigned int)0)), double>::value), "");
907     static_assert((std::is_same<decltype(std::copysign((double)0, (long)0)), double>::value), "");
908     static_assert((std::is_same<decltype(std::copysign((long double)0, (unsigned long)0)), long double>::value), "");
909     static_assert((std::is_same<decltype(std::copysign((int)0, (long long)0)), double>::value), "");
910     static_assert((std::is_same<decltype(std::copysign((int)0, (unsigned long long)0)), double>::value), "");
911     static_assert((std::is_same<decltype(std::copysign((double)0, (double)0)), double>::value), "");
912     static_assert((std::is_same<decltype(std::copysign((long double)0, (long double)0)), long double>::value), "");
913     static_assert((std::is_same<decltype(std::copysign((float)0, (double)0)), double>::value), "");
914     static_assert((std::is_same<decltype(std::copysign((float)0, (long double)0)), long double>::value), "");
915     static_assert((std::is_same<decltype(std::copysign((double)0, (long double)0)), long double>::value), "");
916     static_assert((std::is_same<decltype(std::copysignf(0,0)), float>::value), "");
917     static_assert((std::is_same<decltype(std::copysignl(0,0)), long double>::value), "");
918     static_assert((std::is_same<decltype(std::copysign((int)0, (int)0)), double>::value), "");
919     static_assert((std::is_same<decltype(copysign(Ambiguous(), Ambiguous())), Ambiguous>::value), "");
920     assert(std::copysign(1,1) == 1);
921 }
922 
923 void test_erf()
924 {
925     static_assert((std::is_same<decltype(std::erf((float)0)), float>::value), "");
926     static_assert((std::is_same<decltype(std::erf((bool)0)), double>::value), "");
927     static_assert((std::is_same<decltype(std::erf((unsigned short)0)), double>::value), "");
928     static_assert((std::is_same<decltype(std::erf((int)0)), double>::value), "");
929     static_assert((std::is_same<decltype(std::erf((unsigned int)0)), double>::value), "");
930     static_assert((std::is_same<decltype(std::erf((long)0)), double>::value), "");
931     static_assert((std::is_same<decltype(std::erf((unsigned long)0)), double>::value), "");
932     static_assert((std::is_same<decltype(std::erf((long long)0)), double>::value), "");
933     static_assert((std::is_same<decltype(std::erf((unsigned long long)0)), double>::value), "");
934     static_assert((std::is_same<decltype(std::erf((double)0)), double>::value), "");
935     static_assert((std::is_same<decltype(std::erf((long double)0)), long double>::value), "");
936     static_assert((std::is_same<decltype(std::erff(0)), float>::value), "");
937     static_assert((std::is_same<decltype(std::erfl(0)), long double>::value), "");
938     static_assert((std::is_same<decltype(erf(Ambiguous())), Ambiguous>::value), "");
939     assert(std::erf(0) == 0);
940 }
941 
942 void test_erfc()
943 {
944     static_assert((std::is_same<decltype(std::erfc((float)0)), float>::value), "");
945     static_assert((std::is_same<decltype(std::erfc((bool)0)), double>::value), "");
946     static_assert((std::is_same<decltype(std::erfc((unsigned short)0)), double>::value), "");
947     static_assert((std::is_same<decltype(std::erfc((int)0)), double>::value), "");
948     static_assert((std::is_same<decltype(std::erfc((unsigned int)0)), double>::value), "");
949     static_assert((std::is_same<decltype(std::erfc((long)0)), double>::value), "");
950     static_assert((std::is_same<decltype(std::erfc((unsigned long)0)), double>::value), "");
951     static_assert((std::is_same<decltype(std::erfc((long long)0)), double>::value), "");
952     static_assert((std::is_same<decltype(std::erfc((unsigned long long)0)), double>::value), "");
953     static_assert((std::is_same<decltype(std::erfc((double)0)), double>::value), "");
954     static_assert((std::is_same<decltype(std::erfc((long double)0)), long double>::value), "");
955     static_assert((std::is_same<decltype(std::erfcf(0)), float>::value), "");
956     static_assert((std::is_same<decltype(std::erfcl(0)), long double>::value), "");
957     static_assert((std::is_same<decltype(erfc(Ambiguous())), Ambiguous>::value), "");
958     assert(std::erfc(0) == 1);
959 }
960 
961 void test_exp2()
962 {
963     static_assert((std::is_same<decltype(std::exp2((float)0)), float>::value), "");
964     static_assert((std::is_same<decltype(std::exp2((bool)0)), double>::value), "");
965     static_assert((std::is_same<decltype(std::exp2((unsigned short)0)), double>::value), "");
966     static_assert((std::is_same<decltype(std::exp2((int)0)), double>::value), "");
967     static_assert((std::is_same<decltype(std::exp2((unsigned int)0)), double>::value), "");
968     static_assert((std::is_same<decltype(std::exp2((long)0)), double>::value), "");
969     static_assert((std::is_same<decltype(std::exp2((unsigned long)0)), double>::value), "");
970     static_assert((std::is_same<decltype(std::exp2((long long)0)), double>::value), "");
971     static_assert((std::is_same<decltype(std::exp2((unsigned long long)0)), double>::value), "");
972     static_assert((std::is_same<decltype(std::exp2((double)0)), double>::value), "");
973     static_assert((std::is_same<decltype(std::exp2((long double)0)), long double>::value), "");
974     static_assert((std::is_same<decltype(std::exp2f(0)), float>::value), "");
975     static_assert((std::is_same<decltype(std::exp2l(0)), long double>::value), "");
976     static_assert((std::is_same<decltype(exp2(Ambiguous())), Ambiguous>::value), "");
977     assert(std::exp2(1) == 2);
978 }
979 
980 void test_expm1()
981 {
982     static_assert((std::is_same<decltype(std::expm1((float)0)), float>::value), "");
983     static_assert((std::is_same<decltype(std::expm1((bool)0)), double>::value), "");
984     static_assert((std::is_same<decltype(std::expm1((unsigned short)0)), double>::value), "");
985     static_assert((std::is_same<decltype(std::expm1((int)0)), double>::value), "");
986     static_assert((std::is_same<decltype(std::expm1((unsigned int)0)), double>::value), "");
987     static_assert((std::is_same<decltype(std::expm1((long)0)), double>::value), "");
988     static_assert((std::is_same<decltype(std::expm1((unsigned long)0)), double>::value), "");
989     static_assert((std::is_same<decltype(std::expm1((long long)0)), double>::value), "");
990     static_assert((std::is_same<decltype(std::expm1((unsigned long long)0)), double>::value), "");
991     static_assert((std::is_same<decltype(std::expm1((double)0)), double>::value), "");
992     static_assert((std::is_same<decltype(std::expm1((long double)0)), long double>::value), "");
993     static_assert((std::is_same<decltype(std::expm1f(0)), float>::value), "");
994     static_assert((std::is_same<decltype(std::expm1l(0)), long double>::value), "");
995     static_assert((std::is_same<decltype(expm1(Ambiguous())), Ambiguous>::value), "");
996     assert(std::expm1(0) == 0);
997 }
998 
999 void test_fdim()
1000 {
1001     static_assert((std::is_same<decltype(std::fdim((float)0, (float)0)), float>::value), "");
1002     static_assert((std::is_same<decltype(std::fdim((bool)0, (float)0)), double>::value), "");
1003     static_assert((std::is_same<decltype(std::fdim((unsigned short)0, (double)0)), double>::value), "");
1004     static_assert((std::is_same<decltype(std::fdim((int)0, (long double)0)), long double>::value), "");
1005     static_assert((std::is_same<decltype(std::fdim((float)0, (unsigned int)0)), double>::value), "");
1006     static_assert((std::is_same<decltype(std::fdim((double)0, (long)0)), double>::value), "");
1007     static_assert((std::is_same<decltype(std::fdim((long double)0, (unsigned long)0)), long double>::value), "");
1008     static_assert((std::is_same<decltype(std::fdim((int)0, (long long)0)), double>::value), "");
1009     static_assert((std::is_same<decltype(std::fdim((int)0, (unsigned long long)0)), double>::value), "");
1010     static_assert((std::is_same<decltype(std::fdim((double)0, (double)0)), double>::value), "");
1011     static_assert((std::is_same<decltype(std::fdim((long double)0, (long double)0)), long double>::value), "");
1012     static_assert((std::is_same<decltype(std::fdim((float)0, (double)0)), double>::value), "");
1013     static_assert((std::is_same<decltype(std::fdim((float)0, (long double)0)), long double>::value), "");
1014     static_assert((std::is_same<decltype(std::fdim((double)0, (long double)0)), long double>::value), "");
1015     static_assert((std::is_same<decltype(std::fdimf(0,0)), float>::value), "");
1016     static_assert((std::is_same<decltype(std::fdiml(0,0)), long double>::value), "");
1017     static_assert((std::is_same<decltype(std::fdim((int)0, (int)0)), double>::value), "");
1018     static_assert((std::is_same<decltype(fdim(Ambiguous(), Ambiguous())), Ambiguous>::value), "");
1019     assert(std::fdim(1,0) == 1);
1020 }
1021 
1022 void test_fma()
1023 {
1024     static_assert((std::is_same<decltype(std::fma((bool)0, (float)0, (float)0)), double>::value), "");
1025     static_assert((std::is_same<decltype(std::fma((char)0, (float)0, (float)0)), double>::value), "");
1026     static_assert((std::is_same<decltype(std::fma((unsigned)0, (float)0, (float)0)), double>::value), "");
1027     static_assert((std::is_same<decltype(std::fma((float)0, (int)0, (float)0)), double>::value), "");
1028     static_assert((std::is_same<decltype(std::fma((float)0, (long)0, (float)0)), double>::value), "");
1029     static_assert((std::is_same<decltype(std::fma((float)0, (float)0, (unsigned long long)0)), double>::value), "");
1030     static_assert((std::is_same<decltype(std::fma((float)0, (float)0, (double)0)), double>::value), "");
1031     static_assert((std::is_same<decltype(std::fma((float)0, (float)0, (long double)0)), long double>::value), "");
1032     static_assert((std::is_same<decltype(std::fma((float)0, (float)0, (float)0)), float>::value), "");
1033 
1034     static_assert((std::is_same<decltype(std::fma((bool)0, (double)0, (double)0)), double>::value), "");
1035     static_assert((std::is_same<decltype(std::fma((char)0, (double)0, (double)0)), double>::value), "");
1036     static_assert((std::is_same<decltype(std::fma((unsigned)0, (double)0, (double)0)), double>::value), "");
1037     static_assert((std::is_same<decltype(std::fma((double)0, (int)0, (double)0)), double>::value), "");
1038     static_assert((std::is_same<decltype(std::fma((double)0, (long)0, (double)0)), double>::value), "");
1039     static_assert((std::is_same<decltype(std::fma((double)0, (double)0, (unsigned long long)0)), double>::value), "");
1040     static_assert((std::is_same<decltype(std::fma((double)0, (double)0, (float)0)), double>::value), "");
1041     static_assert((std::is_same<decltype(std::fma((double)0, (double)0, (long double)0)), long double>::value), "");
1042     static_assert((std::is_same<decltype(std::fma((double)0, (double)0,  (double)0)), double>::value), "");
1043 
1044     static_assert((std::is_same<decltype(std::fma((bool)0, (long double)0, (long double)0)), long double>::value), "");
1045     static_assert((std::is_same<decltype(std::fma((char)0, (long double)0, (long double)0)), long double>::value), "");
1046     static_assert((std::is_same<decltype(std::fma((unsigned)0, (long double)0, (long double)0)), long double>::value), "");
1047     static_assert((std::is_same<decltype(std::fma((long double)0, (int)0, (long double)0)), long double>::value), "");
1048     static_assert((std::is_same<decltype(std::fma((long double)0, (long)0, (long double)0)), long double>::value), "");
1049     static_assert((std::is_same<decltype(std::fma((long double)0, (long double)0, (unsigned long long)0)), long double>::value), "");
1050     static_assert((std::is_same<decltype(std::fma((long double)0, (long double)0, (float)0)), long double>::value), "");
1051     static_assert((std::is_same<decltype(std::fma((double)0, (long double)0, (long double)0)), long double>::value), "");
1052     static_assert((std::is_same<decltype(std::fma((long double)0, (long double)0, (long double)0)), long double>::value), "");
1053 
1054     static_assert((std::is_same<decltype(std::fmaf(0,0,0)), float>::value), "");
1055     static_assert((std::is_same<decltype(std::fmal(0,0,0)), long double>::value), "");
1056     static_assert((std::is_same<decltype(fma(Ambiguous(), Ambiguous(), Ambiguous())), Ambiguous>::value), "");
1057     assert(std::fma(1,1,1) == 2);
1058 }
1059 
1060 void test_fmax()
1061 {
1062     static_assert((std::is_same<decltype(std::fmax((float)0, (float)0)), float>::value), "");
1063     static_assert((std::is_same<decltype(std::fmax((bool)0, (float)0)), double>::value), "");
1064     static_assert((std::is_same<decltype(std::fmax((unsigned short)0, (double)0)), double>::value), "");
1065     static_assert((std::is_same<decltype(std::fmax((int)0, (long double)0)), long double>::value), "");
1066     static_assert((std::is_same<decltype(std::fmax((float)0, (unsigned int)0)), double>::value), "");
1067     static_assert((std::is_same<decltype(std::fmax((double)0, (long)0)), double>::value), "");
1068     static_assert((std::is_same<decltype(std::fmax((long double)0, (unsigned long)0)), long double>::value), "");
1069     static_assert((std::is_same<decltype(std::fmax((int)0, (long long)0)), double>::value), "");
1070     static_assert((std::is_same<decltype(std::fmax((int)0, (unsigned long long)0)), double>::value), "");
1071     static_assert((std::is_same<decltype(std::fmax((double)0, (double)0)), double>::value), "");
1072     static_assert((std::is_same<decltype(std::fmax((long double)0, (long double)0)), long double>::value), "");
1073     static_assert((std::is_same<decltype(std::fmax((float)0, (double)0)), double>::value), "");
1074     static_assert((std::is_same<decltype(std::fmax((float)0, (long double)0)), long double>::value), "");
1075     static_assert((std::is_same<decltype(std::fmax((double)0, (long double)0)), long double>::value), "");
1076     static_assert((std::is_same<decltype(std::fmaxf(0,0)), float>::value), "");
1077     static_assert((std::is_same<decltype(std::fmaxl(0,0)), long double>::value), "");
1078     static_assert((std::is_same<decltype(std::fmax((int)0, (int)0)), double>::value), "");
1079     static_assert((std::is_same<decltype(fmax(Ambiguous(), Ambiguous())), Ambiguous>::value), "");
1080     assert(std::fmax(1,0) == 1);
1081 }
1082 
1083 void test_fmin()
1084 {
1085     static_assert((std::is_same<decltype(std::fmin((float)0, (float)0)), float>::value), "");
1086     static_assert((std::is_same<decltype(std::fmin((bool)0, (float)0)), double>::value), "");
1087     static_assert((std::is_same<decltype(std::fmin((unsigned short)0, (double)0)), double>::value), "");
1088     static_assert((std::is_same<decltype(std::fmin((int)0, (long double)0)), long double>::value), "");
1089     static_assert((std::is_same<decltype(std::fmin((float)0, (unsigned int)0)), double>::value), "");
1090     static_assert((std::is_same<decltype(std::fmin((double)0, (long)0)), double>::value), "");
1091     static_assert((std::is_same<decltype(std::fmin((long double)0, (unsigned long)0)), long double>::value), "");
1092     static_assert((std::is_same<decltype(std::fmin((int)0, (long long)0)), double>::value), "");
1093     static_assert((std::is_same<decltype(std::fmin((int)0, (unsigned long long)0)), double>::value), "");
1094     static_assert((std::is_same<decltype(std::fmin((double)0, (double)0)), double>::value), "");
1095     static_assert((std::is_same<decltype(std::fmin((long double)0, (long double)0)), long double>::value), "");
1096     static_assert((std::is_same<decltype(std::fmin((float)0, (double)0)), double>::value), "");
1097     static_assert((std::is_same<decltype(std::fmin((float)0, (long double)0)), long double>::value), "");
1098     static_assert((std::is_same<decltype(std::fmin((double)0, (long double)0)), long double>::value), "");
1099     static_assert((std::is_same<decltype(std::fminf(0,0)), float>::value), "");
1100     static_assert((std::is_same<decltype(std::fminl(0,0)), long double>::value), "");
1101     static_assert((std::is_same<decltype(std::fmin((int)0, (int)0)), double>::value), "");
1102     static_assert((std::is_same<decltype(fmin(Ambiguous(), Ambiguous())), Ambiguous>::value), "");
1103     assert(std::fmin(1,0) == 0);
1104 }
1105 
1106 void test_hypot()
1107 {
1108     static_assert((std::is_same<decltype(std::hypot((float)0, (float)0)), float>::value), "");
1109     static_assert((std::is_same<decltype(std::hypot((bool)0, (float)0)), double>::value), "");
1110     static_assert((std::is_same<decltype(std::hypot((unsigned short)0, (double)0)), double>::value), "");
1111     static_assert((std::is_same<decltype(std::hypot((int)0, (long double)0)), long double>::value), "");
1112     static_assert((std::is_same<decltype(std::hypot((float)0, (unsigned int)0)), double>::value), "");
1113     static_assert((std::is_same<decltype(std::hypot((double)0, (long)0)), double>::value), "");
1114     static_assert((std::is_same<decltype(std::hypot((long double)0, (unsigned long)0)), long double>::value), "");
1115     static_assert((std::is_same<decltype(std::hypot((int)0, (long long)0)), double>::value), "");
1116     static_assert((std::is_same<decltype(std::hypot((int)0, (unsigned long long)0)), double>::value), "");
1117     static_assert((std::is_same<decltype(std::hypot((double)0, (double)0)), double>::value), "");
1118     static_assert((std::is_same<decltype(std::hypot((long double)0, (long double)0)), long double>::value), "");
1119     static_assert((std::is_same<decltype(std::hypot((float)0, (double)0)), double>::value), "");
1120     static_assert((std::is_same<decltype(std::hypot((float)0, (long double)0)), long double>::value), "");
1121     static_assert((std::is_same<decltype(std::hypot((double)0, (long double)0)), long double>::value), "");
1122     static_assert((std::is_same<decltype(std::hypotf(0,0)), float>::value), "");
1123     static_assert((std::is_same<decltype(std::hypotl(0,0)), long double>::value), "");
1124     static_assert((std::is_same<decltype(std::hypot((int)0, (int)0)), double>::value), "");
1125     static_assert((std::is_same<decltype(hypot(Ambiguous(), Ambiguous())), Ambiguous>::value), "");
1126     assert(std::hypot(3,4) == 5);
1127 
1128 #if TEST_STD_VER > 14
1129     static_assert((std::is_same<decltype(std::hypot((float)0, (float)0, (float)0)), float>::value), "");
1130     static_assert((std::is_same<decltype(std::hypot((float)0, (bool)0, (float)0)), double>::value), "");
1131     static_assert((std::is_same<decltype(std::hypot((float)0, (unsigned short)0, (double)0)), double>::value), "");
1132     static_assert((std::is_same<decltype(std::hypot((float)0, (int)0, (long double)0)), long double>::value), "");
1133     static_assert((std::is_same<decltype(std::hypot((float)0, (double)0, (long)0)), double>::value), "");
1134     static_assert((std::is_same<decltype(std::hypot((float)0, (long double)0, (unsigned long)0)), long double>::value), "");
1135     static_assert((std::is_same<decltype(std::hypot((float)0, (int)0, (long long)0)), double>::value), "");
1136     static_assert((std::is_same<decltype(std::hypot((float)0, (int)0, (unsigned long long)0)), double>::value), "");
1137     static_assert((std::is_same<decltype(std::hypot((float)0, (double)0, (double)0)), double>::value), "");
1138     static_assert((std::is_same<decltype(std::hypot((float)0, (long double)0, (long double)0)), long double>::value), "");
1139     static_assert((std::is_same<decltype(std::hypot((float)0, (float)0, (double)0)), double>::value), "");
1140     static_assert((std::is_same<decltype(std::hypot((float)0, (float)0, (long double)0)), long double>::value), "");
1141     static_assert((std::is_same<decltype(std::hypot((float)0, (double)0, (long double)0)), long double>::value), "");
1142     static_assert((std::is_same<decltype(std::hypot((int)0, (int)0, (int)0)), double>::value), "");
1143     static_assert((std::is_same<decltype(hypot(Ambiguous(), Ambiguous(), Ambiguous())), Ambiguous>::value), "");
1144 
1145     assert(std::hypot(2,3,6) == 7);
1146     assert(std::hypot(1,4,8) == 9);
1147 #endif
1148 }
1149 
1150 void test_ilogb()
1151 {
1152     static_assert((std::is_same<decltype(std::ilogb((float)0)), int>::value), "");
1153     static_assert((std::is_same<decltype(std::ilogb((bool)0)), int>::value), "");
1154     static_assert((std::is_same<decltype(std::ilogb((unsigned short)0)), int>::value), "");
1155     static_assert((std::is_same<decltype(std::ilogb((int)0)), int>::value), "");
1156     static_assert((std::is_same<decltype(std::ilogb((unsigned int)0)), int>::value), "");
1157     static_assert((std::is_same<decltype(std::ilogb((long)0)), int>::value), "");
1158     static_assert((std::is_same<decltype(std::ilogb((unsigned long)0)), int>::value), "");
1159     static_assert((std::is_same<decltype(std::ilogb((long long)0)), int>::value), "");
1160     static_assert((std::is_same<decltype(std::ilogb((unsigned long long)0)), int>::value), "");
1161     static_assert((std::is_same<decltype(std::ilogb((double)0)), int>::value), "");
1162     static_assert((std::is_same<decltype(std::ilogb((long double)0)), int>::value), "");
1163     static_assert((std::is_same<decltype(std::ilogbf(0)), int>::value), "");
1164     static_assert((std::is_same<decltype(std::ilogbl(0)), int>::value), "");
1165     static_assert((std::is_same<decltype(ilogb(Ambiguous())), Ambiguous>::value), "");
1166     assert(std::ilogb(1) == 0);
1167 }
1168 
1169 void test_lerp()
1170 {
1171     // See also "lerp.pass.cpp"
1172 
1173 #if TEST_STD_VER > 17
1174     static_assert((std::is_same<decltype(std::lerp((float)0, (float)0, (float)0)), float>::value), "");
1175     static_assert((std::is_same<decltype(std::lerp((float)0, (bool)0, (float)0)), double>::value), "");
1176     static_assert((std::is_same<decltype(std::lerp((float)0, (unsigned short)0, (double)0)), double>::value), "");
1177     static_assert((std::is_same<decltype(std::lerp((float)0, (int)0, (long double)0)), long double>::value), "");
1178     static_assert((std::is_same<decltype(std::lerp((float)0, (double)0, (long)0)), double>::value), "");
1179     static_assert((std::is_same<decltype(std::lerp((float)0, (long double)0, (unsigned long)0)), long double>::value), "");
1180     static_assert((std::is_same<decltype(std::lerp((float)0, (int)0, (long long)0)), double>::value), "");
1181     static_assert((std::is_same<decltype(std::lerp((float)0, (int)0, (unsigned long long)0)), double>::value), "");
1182     static_assert((std::is_same<decltype(std::lerp((float)0, (double)0, (double)0)), double>::value), "");
1183     static_assert((std::is_same<decltype(std::lerp((float)0, (long double)0, (long double)0)), long double>::value), "");
1184     static_assert((std::is_same<decltype(std::lerp((float)0, (float)0, (double)0)), double>::value), "");
1185     static_assert((std::is_same<decltype(std::lerp((float)0, (float)0, (long double)0)), long double>::value), "");
1186     static_assert((std::is_same<decltype(std::lerp((float)0, (double)0, (long double)0)), long double>::value), "");
1187     static_assert((std::is_same<decltype(std::lerp((int)0, (int)0, (int)0)), double>::value), "");
1188     static_assert((std::is_same<decltype(lerp(Ambiguous(), Ambiguous(), Ambiguous())), Ambiguous>::value), "");
1189 
1190     assert(std::lerp(2, 3, 1) == 3);
1191     assert(std::lerp(1, 3, 0.5) == 2);
1192     assert(std::lerp(0, 4.0, 0) == 0);
1193     static_assert(std::lerp(2, 3, 1) == 3);
1194     static_assert(std::lerp(1, 3, 0.5) == 2);
1195     static_assert(std::lerp(0, 4.0, 0) == 0);
1196 #endif
1197 }
1198 
1199 void test_lgamma()
1200 {
1201     static_assert((std::is_same<decltype(std::lgamma((float)0)), float>::value), "");
1202     static_assert((std::is_same<decltype(std::lgamma((bool)0)), double>::value), "");
1203     static_assert((std::is_same<decltype(std::lgamma((unsigned short)0)), double>::value), "");
1204     static_assert((std::is_same<decltype(std::lgamma((int)0)), double>::value), "");
1205     static_assert((std::is_same<decltype(std::lgamma((unsigned int)0)), double>::value), "");
1206     static_assert((std::is_same<decltype(std::lgamma((long)0)), double>::value), "");
1207     static_assert((std::is_same<decltype(std::lgamma((unsigned long)0)), double>::value), "");
1208     static_assert((std::is_same<decltype(std::lgamma((long long)0)), double>::value), "");
1209     static_assert((std::is_same<decltype(std::lgamma((unsigned long long)0)), double>::value), "");
1210     static_assert((std::is_same<decltype(std::lgamma((double)0)), double>::value), "");
1211     static_assert((std::is_same<decltype(std::lgamma((long double)0)), long double>::value), "");
1212     static_assert((std::is_same<decltype(std::lgammaf(0)), float>::value), "");
1213     static_assert((std::is_same<decltype(std::lgammal(0)), long double>::value), "");
1214     static_assert((std::is_same<decltype(lgamma(Ambiguous())), Ambiguous>::value), "");
1215     assert(std::lgamma(1) == 0);
1216 }
1217 
1218 void test_llrint()
1219 {
1220     static_assert((std::is_same<decltype(std::llrint((float)0)), long long>::value), "");
1221     static_assert((std::is_same<decltype(std::llrint((bool)0)), long long>::value), "");
1222     static_assert((std::is_same<decltype(std::llrint((unsigned short)0)), long long>::value), "");
1223     static_assert((std::is_same<decltype(std::llrint((int)0)), long long>::value), "");
1224     static_assert((std::is_same<decltype(std::llrint((unsigned int)0)), long long>::value), "");
1225     static_assert((std::is_same<decltype(std::llrint((long)0)), long long>::value), "");
1226     static_assert((std::is_same<decltype(std::llrint((unsigned long)0)), long long>::value), "");
1227     static_assert((std::is_same<decltype(std::llrint((long long)0)), long long>::value), "");
1228     static_assert((std::is_same<decltype(std::llrint((unsigned long long)0)), long long>::value), "");
1229     static_assert((std::is_same<decltype(std::llrint((double)0)), long long>::value), "");
1230     static_assert((std::is_same<decltype(std::llrint((long double)0)), long long>::value), "");
1231     static_assert((std::is_same<decltype(std::llrintf(0)), long long>::value), "");
1232     static_assert((std::is_same<decltype(std::llrintl(0)), long long>::value), "");
1233     static_assert((std::is_same<decltype(llrint(Ambiguous())), Ambiguous>::value), "");
1234     assert(std::llrint(1) == 1LL);
1235 }
1236 
1237 void test_llround()
1238 {
1239     static_assert((std::is_same<decltype(std::llround((float)0)), long long>::value), "");
1240     static_assert((std::is_same<decltype(std::llround((bool)0)), long long>::value), "");
1241     static_assert((std::is_same<decltype(std::llround((unsigned short)0)), long long>::value), "");
1242     static_assert((std::is_same<decltype(std::llround((int)0)), long long>::value), "");
1243     static_assert((std::is_same<decltype(std::llround((unsigned int)0)), long long>::value), "");
1244     static_assert((std::is_same<decltype(std::llround((long)0)), long long>::value), "");
1245     static_assert((std::is_same<decltype(std::llround((unsigned long)0)), long long>::value), "");
1246     static_assert((std::is_same<decltype(std::llround((long long)0)), long long>::value), "");
1247     static_assert((std::is_same<decltype(std::llround((unsigned long long)0)), long long>::value), "");
1248     static_assert((std::is_same<decltype(std::llround((double)0)), long long>::value), "");
1249     static_assert((std::is_same<decltype(std::llround((long double)0)), long long>::value), "");
1250     static_assert((std::is_same<decltype(std::llroundf(0)), long long>::value), "");
1251     static_assert((std::is_same<decltype(std::llroundl(0)), long long>::value), "");
1252     static_assert((std::is_same<decltype(llround(Ambiguous())), Ambiguous>::value), "");
1253     assert(std::llround(1) == 1LL);
1254 }
1255 
1256 void test_log1p()
1257 {
1258     static_assert((std::is_same<decltype(std::log1p((float)0)), float>::value), "");
1259     static_assert((std::is_same<decltype(std::log1p((bool)0)), double>::value), "");
1260     static_assert((std::is_same<decltype(std::log1p((unsigned short)0)), double>::value), "");
1261     static_assert((std::is_same<decltype(std::log1p((int)0)), double>::value), "");
1262     static_assert((std::is_same<decltype(std::log1p((unsigned int)0)), double>::value), "");
1263     static_assert((std::is_same<decltype(std::log1p((long)0)), double>::value), "");
1264     static_assert((std::is_same<decltype(std::log1p((unsigned long)0)), double>::value), "");
1265     static_assert((std::is_same<decltype(std::log1p((long long)0)), double>::value), "");
1266     static_assert((std::is_same<decltype(std::log1p((unsigned long long)0)), double>::value), "");
1267     static_assert((std::is_same<decltype(std::log1p((double)0)), double>::value), "");
1268     static_assert((std::is_same<decltype(std::log1p((long double)0)), long double>::value), "");
1269     static_assert((std::is_same<decltype(std::log1pf(0)), float>::value), "");
1270     static_assert((std::is_same<decltype(std::log1pl(0)), long double>::value), "");
1271     static_assert((std::is_same<decltype(log1p(Ambiguous())), Ambiguous>::value), "");
1272     assert(std::log1p(0) == 0);
1273 }
1274 
1275 void test_log2()
1276 {
1277     static_assert((std::is_same<decltype(std::log2((float)0)), float>::value), "");
1278     static_assert((std::is_same<decltype(std::log2((bool)0)), double>::value), "");
1279     static_assert((std::is_same<decltype(std::log2((unsigned short)0)), double>::value), "");
1280     static_assert((std::is_same<decltype(std::log2((int)0)), double>::value), "");
1281     static_assert((std::is_same<decltype(std::log2((unsigned int)0)), double>::value), "");
1282     static_assert((std::is_same<decltype(std::log2((long)0)), double>::value), "");
1283     static_assert((std::is_same<decltype(std::log2((unsigned long)0)), double>::value), "");
1284     static_assert((std::is_same<decltype(std::log2((long long)0)), double>::value), "");
1285     static_assert((std::is_same<decltype(std::log2((unsigned long long)0)), double>::value), "");
1286     static_assert((std::is_same<decltype(std::log2((double)0)), double>::value), "");
1287     static_assert((std::is_same<decltype(std::log2((long double)0)), long double>::value), "");
1288     static_assert((std::is_same<decltype(std::log2f(0)), float>::value), "");
1289     static_assert((std::is_same<decltype(std::log2l(0)), long double>::value), "");
1290     static_assert((std::is_same<decltype(log2(Ambiguous())), Ambiguous>::value), "");
1291     assert(std::log2(1) == 0);
1292 }
1293 
1294 void test_logb()
1295 {
1296     static_assert((std::is_same<decltype(std::logb((float)0)), float>::value), "");
1297     static_assert((std::is_same<decltype(std::logb((bool)0)), double>::value), "");
1298     static_assert((std::is_same<decltype(std::logb((unsigned short)0)), double>::value), "");
1299     static_assert((std::is_same<decltype(std::logb((int)0)), double>::value), "");
1300     static_assert((std::is_same<decltype(std::logb((unsigned int)0)), double>::value), "");
1301     static_assert((std::is_same<decltype(std::logb((long)0)), double>::value), "");
1302     static_assert((std::is_same<decltype(std::logb((unsigned long)0)), double>::value), "");
1303     static_assert((std::is_same<decltype(std::logb((long long)0)), double>::value), "");
1304     static_assert((std::is_same<decltype(std::logb((unsigned long long)0)), double>::value), "");
1305     static_assert((std::is_same<decltype(std::logb((double)0)), double>::value), "");
1306     static_assert((std::is_same<decltype(std::logb((long double)0)), long double>::value), "");
1307     static_assert((std::is_same<decltype(std::logbf(0)), float>::value), "");
1308     static_assert((std::is_same<decltype(std::logbl(0)), long double>::value), "");
1309     static_assert((std::is_same<decltype(logb(Ambiguous())), Ambiguous>::value), "");
1310     assert(std::logb(1) == 0);
1311 }
1312 
1313 void test_lrint()
1314 {
1315     static_assert((std::is_same<decltype(std::lrint((float)0)), long>::value), "");
1316     static_assert((std::is_same<decltype(std::lrint((bool)0)), long>::value), "");
1317     static_assert((std::is_same<decltype(std::lrint((unsigned short)0)), long>::value), "");
1318     static_assert((std::is_same<decltype(std::lrint((int)0)), long>::value), "");
1319     static_assert((std::is_same<decltype(std::lrint((unsigned int)0)), long>::value), "");
1320     static_assert((std::is_same<decltype(std::lrint((long)0)), long>::value), "");
1321     static_assert((std::is_same<decltype(std::lrint((unsigned long)0)), long>::value), "");
1322     static_assert((std::is_same<decltype(std::lrint((long long)0)), long>::value), "");
1323     static_assert((std::is_same<decltype(std::lrint((unsigned long long)0)), long>::value), "");
1324     static_assert((std::is_same<decltype(std::lrint((double)0)), long>::value), "");
1325     static_assert((std::is_same<decltype(std::lrint((long double)0)), long>::value), "");
1326     static_assert((std::is_same<decltype(std::lrintf(0)), long>::value), "");
1327     static_assert((std::is_same<decltype(std::lrintl(0)), long>::value), "");
1328     static_assert((std::is_same<decltype(lrint(Ambiguous())), Ambiguous>::value), "");
1329     assert(std::lrint(1) == 1L);
1330 }
1331 
1332 void test_lround()
1333 {
1334     static_assert((std::is_same<decltype(std::lround((float)0)), long>::value), "");
1335     static_assert((std::is_same<decltype(std::lround((bool)0)), long>::value), "");
1336     static_assert((std::is_same<decltype(std::lround((unsigned short)0)), long>::value), "");
1337     static_assert((std::is_same<decltype(std::lround((int)0)), long>::value), "");
1338     static_assert((std::is_same<decltype(std::lround((unsigned int)0)), long>::value), "");
1339     static_assert((std::is_same<decltype(std::lround((long)0)), long>::value), "");
1340     static_assert((std::is_same<decltype(std::lround((unsigned long)0)), long>::value), "");
1341     static_assert((std::is_same<decltype(std::lround((long long)0)), long>::value), "");
1342     static_assert((std::is_same<decltype(std::lround((unsigned long long)0)), long>::value), "");
1343     static_assert((std::is_same<decltype(std::lround((double)0)), long>::value), "");
1344     static_assert((std::is_same<decltype(std::lround((long double)0)), long>::value), "");
1345     static_assert((std::is_same<decltype(std::lroundf(0)), long>::value), "");
1346     static_assert((std::is_same<decltype(std::lroundl(0)), long>::value), "");
1347     static_assert((std::is_same<decltype(lround(Ambiguous())), Ambiguous>::value), "");
1348     assert(std::lround(1) == 1L);
1349 }
1350 
1351 void test_nan()
1352 {
1353     static_assert((std::is_same<decltype(std::nan("")), double>::value), "");
1354     static_assert((std::is_same<decltype(std::nanf("")), float>::value), "");
1355     static_assert((std::is_same<decltype(std::nanl("")), long double>::value), "");
1356 }
1357 
1358 void test_nearbyint()
1359 {
1360     static_assert((std::is_same<decltype(std::nearbyint((float)0)), float>::value), "");
1361     static_assert((std::is_same<decltype(std::nearbyint((bool)0)), double>::value), "");
1362     static_assert((std::is_same<decltype(std::nearbyint((unsigned short)0)), double>::value), "");
1363     static_assert((std::is_same<decltype(std::nearbyint((int)0)), double>::value), "");
1364     static_assert((std::is_same<decltype(std::nearbyint((unsigned int)0)), double>::value), "");
1365     static_assert((std::is_same<decltype(std::nearbyint((long)0)), double>::value), "");
1366     static_assert((std::is_same<decltype(std::nearbyint((unsigned long)0)), double>::value), "");
1367     static_assert((std::is_same<decltype(std::nearbyint((long long)0)), double>::value), "");
1368     static_assert((std::is_same<decltype(std::nearbyint((unsigned long long)0)), double>::value), "");
1369     static_assert((std::is_same<decltype(std::nearbyint((double)0)), double>::value), "");
1370     static_assert((std::is_same<decltype(std::nearbyint((long double)0)), long double>::value), "");
1371     static_assert((std::is_same<decltype(std::nearbyintf(0)), float>::value), "");
1372     static_assert((std::is_same<decltype(std::nearbyintl(0)), long double>::value), "");
1373     static_assert((std::is_same<decltype(nearbyint(Ambiguous())), Ambiguous>::value), "");
1374     assert(std::nearbyint(1) == 1);
1375 }
1376 
1377 void test_nextafter()
1378 {
1379     static_assert((std::is_same<decltype(std::nextafter((float)0, (float)0)), float>::value), "");
1380     static_assert((std::is_same<decltype(std::nextafter((bool)0, (float)0)), double>::value), "");
1381     static_assert((std::is_same<decltype(std::nextafter((unsigned short)0, (double)0)), double>::value), "");
1382     static_assert((std::is_same<decltype(std::nextafter((int)0, (long double)0)), long double>::value), "");
1383     static_assert((std::is_same<decltype(std::nextafter((float)0, (unsigned int)0)), double>::value), "");
1384     static_assert((std::is_same<decltype(std::nextafter((double)0, (long)0)), double>::value), "");
1385     static_assert((std::is_same<decltype(std::nextafter((long double)0, (unsigned long)0)), long double>::value), "");
1386     static_assert((std::is_same<decltype(std::nextafter((int)0, (long long)0)), double>::value), "");
1387     static_assert((std::is_same<decltype(std::nextafter((int)0, (unsigned long long)0)), double>::value), "");
1388     static_assert((std::is_same<decltype(std::nextafter((double)0, (double)0)), double>::value), "");
1389     static_assert((std::is_same<decltype(std::nextafter((long double)0, (long double)0)), long double>::value), "");
1390     static_assert((std::is_same<decltype(std::nextafter((float)0, (double)0)), double>::value), "");
1391     static_assert((std::is_same<decltype(std::nextafter((float)0, (long double)0)), long double>::value), "");
1392     static_assert((std::is_same<decltype(std::nextafter((double)0, (long double)0)), long double>::value), "");
1393     static_assert((std::is_same<decltype(std::nextafterf(0,0)), float>::value), "");
1394     static_assert((std::is_same<decltype(std::nextafterl(0,0)), long double>::value), "");
1395     static_assert((std::is_same<decltype(std::nextafter((int)0, (int)0)), double>::value), "");
1396     static_assert((std::is_same<decltype(nextafter(Ambiguous(), Ambiguous())), Ambiguous>::value), "");
1397     assert(std::nextafter(0,1) == hexfloat<double>(0x1, 0, -1074));
1398 }
1399 
1400 void test_nexttoward()
1401 {
1402     static_assert((std::is_same<decltype(std::nexttoward((float)0, (long double)0)), float>::value), "");
1403     static_assert((std::is_same<decltype(std::nexttoward((bool)0, (long double)0)), double>::value), "");
1404     static_assert((std::is_same<decltype(std::nexttoward((unsigned short)0, (long double)0)), double>::value), "");
1405     static_assert((std::is_same<decltype(std::nexttoward((int)0, (long double)0)), double>::value), "");
1406     static_assert((std::is_same<decltype(std::nexttoward((unsigned int)0, (long double)0)), double>::value), "");
1407     static_assert((std::is_same<decltype(std::nexttoward((long)0, (long double)0)), double>::value), "");
1408     static_assert((std::is_same<decltype(std::nexttoward((unsigned long)0, (long double)0)), double>::value), "");
1409     static_assert((std::is_same<decltype(std::nexttoward((long long)0, (long double)0)), double>::value), "");
1410     static_assert((std::is_same<decltype(std::nexttoward((unsigned long long)0, (long double)0)), double>::value), "");
1411     static_assert((std::is_same<decltype(std::nexttoward((double)0, (long double)0)), double>::value), "");
1412     static_assert((std::is_same<decltype(std::nexttoward((long double)0, (long double)0)), long double>::value), "");
1413     static_assert((std::is_same<decltype(std::nexttowardf(0, (long double)0)), float>::value), "");
1414     static_assert((std::is_same<decltype(std::nexttowardl(0, (long double)0)), long double>::value), "");
1415     static_assert((std::is_same<decltype(nexttoward(Ambiguous(), Ambiguous())), Ambiguous>::value), "");
1416     assert(std::nexttoward(0, 1) == hexfloat<double>(0x1, 0, -1074));
1417 }
1418 
1419 void test_remainder()
1420 {
1421     static_assert((std::is_same<decltype(std::remainder((float)0, (float)0)), float>::value), "");
1422     static_assert((std::is_same<decltype(std::remainder((bool)0, (float)0)), double>::value), "");
1423     static_assert((std::is_same<decltype(std::remainder((unsigned short)0, (double)0)), double>::value), "");
1424     static_assert((std::is_same<decltype(std::remainder((int)0, (long double)0)), long double>::value), "");
1425     static_assert((std::is_same<decltype(std::remainder((float)0, (unsigned int)0)), double>::value), "");
1426     static_assert((std::is_same<decltype(std::remainder((double)0, (long)0)), double>::value), "");
1427     static_assert((std::is_same<decltype(std::remainder((long double)0, (unsigned long)0)), long double>::value), "");
1428     static_assert((std::is_same<decltype(std::remainder((int)0, (long long)0)), double>::value), "");
1429     static_assert((std::is_same<decltype(std::remainder((int)0, (unsigned long long)0)), double>::value), "");
1430     static_assert((std::is_same<decltype(std::remainder((double)0, (double)0)), double>::value), "");
1431     static_assert((std::is_same<decltype(std::remainder((long double)0, (long double)0)), long double>::value), "");
1432     static_assert((std::is_same<decltype(std::remainder((float)0, (double)0)), double>::value), "");
1433     static_assert((std::is_same<decltype(std::remainder((float)0, (long double)0)), long double>::value), "");
1434     static_assert((std::is_same<decltype(std::remainder((double)0, (long double)0)), long double>::value), "");
1435     static_assert((std::is_same<decltype(std::remainderf(0,0)), float>::value), "");
1436     static_assert((std::is_same<decltype(std::remainderl(0,0)), long double>::value), "");
1437     static_assert((std::is_same<decltype(std::remainder((int)0, (int)0)), double>::value), "");
1438     static_assert((std::is_same<decltype(remainder(Ambiguous(), Ambiguous())), Ambiguous>::value), "");
1439     assert(std::remainder(0.5,1) == 0.5);
1440 }
1441 
1442 void test_remquo()
1443 {
1444     int ip;
1445     static_assert((std::is_same<decltype(std::remquo((float)0, (float)0, &ip)), float>::value), "");
1446     static_assert((std::is_same<decltype(std::remquo((bool)0, (float)0, &ip)), double>::value), "");
1447     static_assert((std::is_same<decltype(std::remquo((unsigned short)0, (double)0, &ip)), double>::value), "");
1448     static_assert((std::is_same<decltype(std::remquo((int)0, (long double)0, &ip)), long double>::value), "");
1449     static_assert((std::is_same<decltype(std::remquo((float)0, (unsigned int)0, &ip)), double>::value), "");
1450     static_assert((std::is_same<decltype(std::remquo((double)0, (long)0, &ip)), double>::value), "");
1451     static_assert((std::is_same<decltype(std::remquo((long double)0, (unsigned long)0, &ip)), long double>::value), "");
1452     static_assert((std::is_same<decltype(std::remquo((int)0, (long long)0, &ip)), double>::value), "");
1453     static_assert((std::is_same<decltype(std::remquo((int)0, (unsigned long long)0, &ip)), double>::value), "");
1454     static_assert((std::is_same<decltype(std::remquo((double)0, (double)0, &ip)), double>::value), "");
1455     static_assert((std::is_same<decltype(std::remquo((long double)0, (long double)0, &ip)), long double>::value), "");
1456     static_assert((std::is_same<decltype(std::remquo((float)0, (double)0, &ip)), double>::value), "");
1457     static_assert((std::is_same<decltype(std::remquo((float)0, (long double)0, &ip)), long double>::value), "");
1458     static_assert((std::is_same<decltype(std::remquo((double)0, (long double)0, &ip)), long double>::value), "");
1459     static_assert((std::is_same<decltype(std::remquof(0,0, &ip)), float>::value), "");
1460     static_assert((std::is_same<decltype(std::remquol(0,0, &ip)), long double>::value), "");
1461     static_assert((std::is_same<decltype(std::remquo((int)0, (int)0, &ip)), double>::value), "");
1462     static_assert((std::is_same<decltype(remquo(Ambiguous(), Ambiguous(), &ip)), Ambiguous>::value), "");
1463     assert(std::remquo(0.5,1, &ip) == 0.5);
1464 }
1465 
1466 void test_rint()
1467 {
1468     static_assert((std::is_same<decltype(std::rint((float)0)), float>::value), "");
1469     static_assert((std::is_same<decltype(std::rint((bool)0)), double>::value), "");
1470     static_assert((std::is_same<decltype(std::rint((unsigned short)0)), double>::value), "");
1471     static_assert((std::is_same<decltype(std::rint((int)0)), double>::value), "");
1472     static_assert((std::is_same<decltype(std::rint((unsigned int)0)), double>::value), "");
1473     static_assert((std::is_same<decltype(std::rint((long)0)), double>::value), "");
1474     static_assert((std::is_same<decltype(std::rint((unsigned long)0)), double>::value), "");
1475     static_assert((std::is_same<decltype(std::rint((long long)0)), double>::value), "");
1476     static_assert((std::is_same<decltype(std::rint((unsigned long long)0)), double>::value), "");
1477     static_assert((std::is_same<decltype(std::rint((double)0)), double>::value), "");
1478     static_assert((std::is_same<decltype(std::rint((long double)0)), long double>::value), "");
1479     static_assert((std::is_same<decltype(std::rintf(0)), float>::value), "");
1480     static_assert((std::is_same<decltype(std::rintl(0)), long double>::value), "");
1481     static_assert((std::is_same<decltype(rint(Ambiguous())), Ambiguous>::value), "");
1482     assert(std::rint(1) == 1);
1483 }
1484 
1485 void test_round()
1486 {
1487     static_assert((std::is_same<decltype(std::round((float)0)), float>::value), "");
1488     static_assert((std::is_same<decltype(std::round((bool)0)), double>::value), "");
1489     static_assert((std::is_same<decltype(std::round((unsigned short)0)), double>::value), "");
1490     static_assert((std::is_same<decltype(std::round((int)0)), double>::value), "");
1491     static_assert((std::is_same<decltype(std::round((unsigned int)0)), double>::value), "");
1492     static_assert((std::is_same<decltype(std::round((long)0)), double>::value), "");
1493     static_assert((std::is_same<decltype(std::round((unsigned long)0)), double>::value), "");
1494     static_assert((std::is_same<decltype(std::round((long long)0)), double>::value), "");
1495     static_assert((std::is_same<decltype(std::round((unsigned long long)0)), double>::value), "");
1496     static_assert((std::is_same<decltype(std::round((double)0)), double>::value), "");
1497     static_assert((std::is_same<decltype(std::round((long double)0)), long double>::value), "");
1498     static_assert((std::is_same<decltype(std::roundf(0)), float>::value), "");
1499     static_assert((std::is_same<decltype(std::roundl(0)), long double>::value), "");
1500     static_assert((std::is_same<decltype(round(Ambiguous())), Ambiguous>::value), "");
1501     assert(std::round(1) == 1);
1502 }
1503 
1504 void test_scalbln()
1505 {
1506     static_assert((std::is_same<decltype(std::scalbln((float)0, (long)0)), float>::value), "");
1507     static_assert((std::is_same<decltype(std::scalbln((bool)0, (long)0)), double>::value), "");
1508     static_assert((std::is_same<decltype(std::scalbln((unsigned short)0, (long)0)), double>::value), "");
1509     static_assert((std::is_same<decltype(std::scalbln((int)0, (long)0)), double>::value), "");
1510     static_assert((std::is_same<decltype(std::scalbln((unsigned int)0, (long)0)), double>::value), "");
1511     static_assert((std::is_same<decltype(std::scalbln((long)0, (long)0)), double>::value), "");
1512     static_assert((std::is_same<decltype(std::scalbln((unsigned long)0, (long)0)), double>::value), "");
1513     static_assert((std::is_same<decltype(std::scalbln((long long)0, (long)0)), double>::value), "");
1514     static_assert((std::is_same<decltype(std::scalbln((unsigned long long)0, (long)0)), double>::value), "");
1515     static_assert((std::is_same<decltype(std::scalbln((double)0, (long)0)), double>::value), "");
1516     static_assert((std::is_same<decltype(std::scalbln((long double)0, (long)0)), long double>::value), "");
1517     static_assert((std::is_same<decltype(std::scalblnf(0, (long)0)), float>::value), "");
1518     static_assert((std::is_same<decltype(std::scalblnl(0, (long)0)), long double>::value), "");
1519     static_assert((std::is_same<decltype(scalbln(Ambiguous(), Ambiguous())), Ambiguous>::value), "");
1520     assert(std::scalbln(1, 1) == 2);
1521 }
1522 
1523 void test_scalbn()
1524 {
1525     static_assert((std::is_same<decltype(std::scalbn((float)0, (int)0)), float>::value), "");
1526     static_assert((std::is_same<decltype(std::scalbn((bool)0, (int)0)), double>::value), "");
1527     static_assert((std::is_same<decltype(std::scalbn((unsigned short)0, (int)0)), double>::value), "");
1528     static_assert((std::is_same<decltype(std::scalbn((int)0, (int)0)), double>::value), "");
1529     static_assert((std::is_same<decltype(std::scalbn((unsigned int)0, (int)0)), double>::value), "");
1530     static_assert((std::is_same<decltype(std::scalbn((long)0, (int)0)), double>::value), "");
1531     static_assert((std::is_same<decltype(std::scalbn((unsigned long)0, (int)0)), double>::value), "");
1532     static_assert((std::is_same<decltype(std::scalbn((long long)0, (int)0)), double>::value), "");
1533     static_assert((std::is_same<decltype(std::scalbn((unsigned long long)0, (int)0)), double>::value), "");
1534     static_assert((std::is_same<decltype(std::scalbn((double)0, (int)0)), double>::value), "");
1535     static_assert((std::is_same<decltype(std::scalbn((long double)0, (int)0)), long double>::value), "");
1536     static_assert((std::is_same<decltype(std::scalbnf(0, (int)0)), float>::value), "");
1537     static_assert((std::is_same<decltype(std::scalbnl(0, (int)0)), long double>::value), "");
1538     static_assert((std::is_same<decltype(scalbn(Ambiguous(), Ambiguous())), Ambiguous>::value), "");
1539     assert(std::scalbn(1, 1) == 2);
1540 }
1541 
1542 void test_tgamma()
1543 {
1544     static_assert((std::is_same<decltype(std::tgamma((float)0)), float>::value), "");
1545     static_assert((std::is_same<decltype(std::tgamma((bool)0)), double>::value), "");
1546     static_assert((std::is_same<decltype(std::tgamma((unsigned short)0)), double>::value), "");
1547     static_assert((std::is_same<decltype(std::tgamma((int)0)), double>::value), "");
1548     static_assert((std::is_same<decltype(std::tgamma((unsigned int)0)), double>::value), "");
1549     static_assert((std::is_same<decltype(std::tgamma((long)0)), double>::value), "");
1550     static_assert((std::is_same<decltype(std::tgamma((unsigned long)0)), double>::value), "");
1551     static_assert((std::is_same<decltype(std::tgamma((long long)0)), double>::value), "");
1552     static_assert((std::is_same<decltype(std::tgamma((unsigned long long)0)), double>::value), "");
1553     static_assert((std::is_same<decltype(std::tgamma((double)0)), double>::value), "");
1554     static_assert((std::is_same<decltype(std::tgamma((long double)0)), long double>::value), "");
1555     static_assert((std::is_same<decltype(std::tgammaf(0)), float>::value), "");
1556     static_assert((std::is_same<decltype(std::tgammal(0)), long double>::value), "");
1557     static_assert((std::is_same<decltype(tgamma(Ambiguous())), Ambiguous>::value), "");
1558     assert(std::tgamma(1) == 1);
1559 }
1560 
1561 void test_trunc()
1562 {
1563     static_assert((std::is_same<decltype(std::trunc((float)0)), float>::value), "");
1564     static_assert((std::is_same<decltype(std::trunc((bool)0)), double>::value), "");
1565     static_assert((std::is_same<decltype(std::trunc((unsigned short)0)), double>::value), "");
1566     static_assert((std::is_same<decltype(std::trunc((int)0)), double>::value), "");
1567     static_assert((std::is_same<decltype(std::trunc((unsigned int)0)), double>::value), "");
1568     static_assert((std::is_same<decltype(std::trunc((long)0)), double>::value), "");
1569     static_assert((std::is_same<decltype(std::trunc((unsigned long)0)), double>::value), "");
1570     static_assert((std::is_same<decltype(std::trunc((long long)0)), double>::value), "");
1571     static_assert((std::is_same<decltype(std::trunc((unsigned long long)0)), double>::value), "");
1572     static_assert((std::is_same<decltype(std::trunc((double)0)), double>::value), "");
1573     static_assert((std::is_same<decltype(std::trunc((long double)0)), long double>::value), "");
1574     static_assert((std::is_same<decltype(std::truncf(0)), float>::value), "");
1575     static_assert((std::is_same<decltype(std::truncl(0)), long double>::value), "");
1576     static_assert((std::is_same<decltype(trunc(Ambiguous())), Ambiguous>::value), "");
1577     assert(std::trunc(1) == 1);
1578 }
1579 
1580 int main(int, char**)
1581 {
1582     test_abs();
1583     test_acos();
1584     test_asin();
1585     test_atan();
1586     test_atan2();
1587     test_ceil();
1588     test_cos();
1589     test_cosh();
1590     test_exp();
1591     test_fabs();
1592     test_floor();
1593     test_fmod();
1594     test_frexp();
1595     test_ldexp();
1596     test_log();
1597     test_log10();
1598     test_modf();
1599     test_pow();
1600     test_sin();
1601     test_sinh();
1602     test_sqrt();
1603     test_tan();
1604     test_tanh();
1605     test_signbit();
1606     test_fpclassify();
1607     test_isfinite();
1608     test_isnormal();
1609     test_isgreater();
1610     test_isgreaterequal();
1611     test_isinf();
1612     test_isless();
1613     test_islessequal();
1614     test_islessgreater();
1615     test_isnan();
1616     test_isunordered();
1617     test_acosh();
1618     test_asinh();
1619     test_atanh();
1620     test_cbrt();
1621     test_copysign();
1622     test_erf();
1623     test_erfc();
1624     test_exp2();
1625     test_expm1();
1626     test_fdim();
1627     test_fma();
1628     test_fmax();
1629     test_fmin();
1630     test_hypot();
1631     test_ilogb();
1632     test_lerp();
1633     test_lgamma();
1634     test_llrint();
1635     test_llround();
1636     test_log1p();
1637     test_log2();
1638     test_logb();
1639     test_lrint();
1640     test_lround();
1641     test_nan();
1642     test_nearbyint();
1643     test_nextafter();
1644     test_nexttoward();
1645     test_remainder();
1646     test_remquo();
1647     test_rint();
1648     test_round();
1649     test_scalbln();
1650     test_scalbn();
1651     test_tgamma();
1652     test_trunc();
1653 
1654   return 0;
1655 }
1656