1 // Formatting library for C++ - formatting library tests
2 //
3 // Copyright (c) 2012 - present, Victor Zverovich
4 // All rights reserved.
5 //
6 // For the license information refer to format.h.
7
8 #include "fmt/compile.h"
9 #include "gmock/gmock.h"
10
11 #if FMT_USE_CONSTEVAL
12
13 template <size_t max_string_length, typename Char = char> struct test_string {
operator ==test_string14 template <typename T> constexpr bool operator==(const T& rhs) const noexcept {
15 return fmt::basic_string_view<Char>(rhs).compare(buffer) == 0;
16 }
17 Char buffer[max_string_length]{};
18 };
19
20 template <size_t max_string_length, typename Char = char, typename... Args>
test_format(auto format,const Args &...args)21 consteval auto test_format(auto format, const Args&... args) {
22 test_string<max_string_length, Char> string{};
23 fmt::format_to(string.buffer, format, args...);
24 return string;
25 }
26
TEST(compile_time_formatting_test,floating_point)27 TEST(compile_time_formatting_test, floating_point) {
28 EXPECT_EQ("0", test_format<2>(FMT_COMPILE("{}"), 0.0f));
29 EXPECT_EQ("392.500000", test_format<11>(FMT_COMPILE("{0:f}"), 392.5f));
30
31 EXPECT_EQ("0", test_format<2>(FMT_COMPILE("{:}"), 0.0));
32 EXPECT_EQ("0.000000", test_format<9>(FMT_COMPILE("{:f}"), 0.0));
33 EXPECT_EQ("0", test_format<2>(FMT_COMPILE("{:g}"), 0.0));
34 EXPECT_EQ("392.65", test_format<7>(FMT_COMPILE("{:}"), 392.65));
35 EXPECT_EQ("392.65", test_format<7>(FMT_COMPILE("{:g}"), 392.65));
36 EXPECT_EQ("392.65", test_format<7>(FMT_COMPILE("{:G}"), 392.65));
37 EXPECT_EQ("4.9014e+06", test_format<11>(FMT_COMPILE("{:g}"), 4.9014e6));
38 EXPECT_EQ("-392.650000", test_format<12>(FMT_COMPILE("{:f}"), -392.65));
39 EXPECT_EQ("-392.650000", test_format<12>(FMT_COMPILE("{:F}"), -392.65));
40
41 EXPECT_EQ("3.926500e+02", test_format<13>(FMT_COMPILE("{0:e}"), 392.65));
42 EXPECT_EQ("3.926500E+02", test_format<13>(FMT_COMPILE("{0:E}"), 392.65));
43 EXPECT_EQ("+0000392.6", test_format<11>(FMT_COMPILE("{0:+010.4g}"), 392.65));
44 EXPECT_EQ("9223372036854775808.000000",
45 test_format<27>(FMT_COMPILE("{:f}"), 9223372036854775807.0));
46
47 constexpr double nan = std::numeric_limits<double>::quiet_NaN();
48 EXPECT_EQ("nan", test_format<4>(FMT_COMPILE("{}"), nan));
49 EXPECT_EQ("+nan", test_format<5>(FMT_COMPILE("{:+}"), nan));
50 if (std::signbit(-nan))
51 EXPECT_EQ("-nan", test_format<5>(FMT_COMPILE("{}"), -nan));
52 else
53 fmt::print("Warning: compiler doesn't handle negative NaN correctly");
54
55 constexpr double inf = std::numeric_limits<double>::infinity();
56 EXPECT_EQ("inf", test_format<4>(FMT_COMPILE("{}"), inf));
57 EXPECT_EQ("+inf", test_format<5>(FMT_COMPILE("{:+}"), inf));
58 EXPECT_EQ("-inf", test_format<5>(FMT_COMPILE("{}"), -inf));
59 }
60
61 #endif // FMT_USE_CONSTEVAL
62