1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
|
//===----------------------------------------------------------------------===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
//
// UNSUPPORTED: c++03
// <random>
// template<class _IntType = int>
// class uniform_int_distribution
// template<class _URNG> result_type operator()(_URNG& g);
#include <random>
#include <cassert>
#include "test_macros.h"
int main(int, char**) {
#ifndef TEST_HAS_NO_INT128
// Test that values outside of the 64-bit range can be produced.
{
std::minstd_rand0 e;
std::uniform_int_distribution<__int128_t> d;
assert(d.min() == 0 && d.max() == std::numeric_limits<__int128_t>::max());
bool all_in_64bit_range = true;
for (int i = 0; i < 100; ++i) {
__int128_t n = d(e);
all_in_64bit_range = all_in_64bit_range && (n <= UINT64_MAX);
}
assert(!all_in_64bit_range);
}
// Same test as above with min/max set and outside the 64-bit range.
{
__int128_t a = ((__int128_t)INT64_MIN) * 10;
__int128_t b = ((__int128_t)INT64_MAX) * 10;
std::minstd_rand0 e;
std::uniform_int_distribution<__int128_t> d(a, b);
assert(d.min() == a && d.max() == b);
bool all_in_64bit_range = true;
for (int i = 0; i < 100; ++i) {
__int128_t n = d(e);
assert(a <= n && n <= b);
all_in_64bit_range = all_in_64bit_range && (INT64_MIN <= n) && (n <= (INT64_MAX));
}
assert(!all_in_64bit_range);
}
// Same test as above with __uint128_t.
{
__uint128_t a = UINT64_MAX / 3;
__uint128_t b = ((__uint128_t)UINT64_MAX) * 10;
std::minstd_rand0 e;
std::uniform_int_distribution<__uint128_t> d(a, b);
assert(d.min() == a && d.max() == b);
bool all_in_64bit_range = true;
for (int i = 0; i < 100; ++i) {
__uint128_t n = d(e);
assert(a <= n && n <= b);
all_in_64bit_range = all_in_64bit_range && (n <= (UINT64_MAX));
}
assert(!all_in_64bit_range);
}
// Regression test for PR#51520:
{
std::minstd_rand0 e;
std::uniform_int_distribution<__int128_t> d(INT64_MIN, INT64_MAX);
assert(d.min() == INT64_MIN && d.max() == INT64_MAX);
for (int i = 0; i < 100; ++i) {
__int128_t n = d(e);
assert((INT64_MIN <= n) && (n <= INT64_MAX));
}
}
#endif // TEST_HAS_NO_INT128
return 0;
}
|
