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 defined(__cpp_lib_bit_cast) && __cpp_lib_bit_cast >= 201806 && \
12 defined(__cpp_constexpr) && __cpp_constexpr >= 201907 && \
13 defined(__cpp_constexpr_dynamic_alloc) && \
14 __cpp_constexpr_dynamic_alloc >= 201907 && FMT_CPLUSPLUS >= 202002L
15
16 template <size_t max_string_length, typename Char = char> struct test_string {
operator ==test_string17 template <typename T> constexpr bool operator==(const T& rhs) const noexcept {
18 return fmt::basic_string_view<Char>(rhs).compare(buffer) == 0;
19 }
20 Char buffer[max_string_length]{};
21 };
22
23 template <size_t max_string_length, typename Char = char, typename... Args>
test_format(auto format,const Args &...args)24 consteval auto test_format(auto format, const Args&... args) {
25 test_string<max_string_length, Char> string{};
26 fmt::format_to(string.buffer, format, args...);
27 return string;
28 }
29
TEST(compile_time_formatting_test,floating_point)30 TEST(compile_time_formatting_test, floating_point) {
31 EXPECT_EQ("0", test_format<2>(FMT_COMPILE("{}"), 0.0f));
32 EXPECT_EQ("392.500000", test_format<11>(FMT_COMPILE("{0:f}"), 392.5f));
33
34 EXPECT_EQ("0", test_format<2>(FMT_COMPILE("{:}"), 0.0));
35 EXPECT_EQ("0.000000", test_format<9>(FMT_COMPILE("{:f}"), 0.0));
36 EXPECT_EQ("0", test_format<2>(FMT_COMPILE("{:g}"), 0.0));
37 EXPECT_EQ("392.65", test_format<7>(FMT_COMPILE("{:}"), 392.65));
38 EXPECT_EQ("392.65", test_format<7>(FMT_COMPILE("{:g}"), 392.65));
39 EXPECT_EQ("392.65", test_format<7>(FMT_COMPILE("{:G}"), 392.65));
40 EXPECT_EQ("4.9014e+06", test_format<11>(FMT_COMPILE("{:g}"), 4.9014e6));
41 EXPECT_EQ("-392.650000", test_format<12>(FMT_COMPILE("{:f}"), -392.65));
42 EXPECT_EQ("-392.650000", test_format<12>(FMT_COMPILE("{:F}"), -392.65));
43
44 EXPECT_EQ("3.926500e+02", test_format<13>(FMT_COMPILE("{0:e}"), 392.65));
45 EXPECT_EQ("3.926500E+02", test_format<13>(FMT_COMPILE("{0:E}"), 392.65));
46 EXPECT_EQ("+0000392.6", test_format<11>(FMT_COMPILE("{0:+010.4g}"), 392.65));
47 EXPECT_EQ("9223372036854775808.000000",
48 test_format<27>(FMT_COMPILE("{:f}"), 9223372036854775807.0));
49
50 constexpr double nan = std::numeric_limits<double>::quiet_NaN();
51 EXPECT_EQ("nan", test_format<4>(FMT_COMPILE("{}"), nan));
52 EXPECT_EQ("+nan", test_format<5>(FMT_COMPILE("{:+}"), nan));
53 if (std::signbit(-nan))
54 EXPECT_EQ("-nan", test_format<5>(FMT_COMPILE("{}"), -nan));
55 else
56 fmt::print("Warning: compiler doesn't handle negative NaN correctly");
57
58 constexpr double inf = std::numeric_limits<double>::infinity();
59 EXPECT_EQ("inf", test_format<4>(FMT_COMPILE("{}"), inf));
60 EXPECT_EQ("+inf", test_format<5>(FMT_COMPILE("{:+}"), inf));
61 EXPECT_EQ("-inf", test_format<5>(FMT_COMPILE("{}"), -inf));
62 }
63 #endif
64