mirror of
https://github.com/fmtlib/fmt.git
synced 2024-11-05 11:27:40 +00:00
6a775e9560
Add support for 'std::variant' in C++17. For C++17, if all the alternatives of a variant are formattable the variant is now also formattable. In addition 'std::monostate' is now formattable. Moves implementation into 'std.h', and tests into 'std-test.cc'. Avoid fold-expression since MSVC was crashing. Add section for 'fmt/std.h' in API-docs.
68 lines
2.4 KiB
C++
68 lines
2.4 KiB
C++
// Formatting library for C++ - tests of formatters for standard library types
|
|
//
|
|
// Copyright (c) 2012 - present, Victor Zverovich
|
|
// All rights reserved.
|
|
//
|
|
// For the license information refer to format.h.
|
|
|
|
#include "fmt/std.h"
|
|
|
|
#include <string>
|
|
|
|
#include "gtest/gtest.h"
|
|
|
|
TEST(std_test, path) {
|
|
#ifdef __cpp_lib_filesystem
|
|
EXPECT_EQ(fmt::format("{:8}", std::filesystem::path("foo")), "\"foo\" ");
|
|
EXPECT_EQ(fmt::format("{}", std::filesystem::path("foo\"bar.txt")),
|
|
"\"foo\\\"bar.txt\"");
|
|
|
|
# ifdef _WIN32
|
|
// File.txt in Russian.
|
|
const wchar_t unicode_path[] = {0x424, 0x430, 0x439, 0x43b, 0x2e,
|
|
0x74, 0x78, 0x74, 0};
|
|
const char unicode_u8path[] = {'"', char(0xd0), char(0xa4), char(0xd0),
|
|
char(0xb0), char(0xd0), char(0xb9), char(0xd0),
|
|
char(0xbb), '.', 't', 'x',
|
|
't', '"', '\0'};
|
|
EXPECT_EQ(fmt::format("{}", std::filesystem::path(unicode_path)),
|
|
unicode_u8path);
|
|
# endif
|
|
#endif
|
|
}
|
|
|
|
TEST(std_test, thread_id) {
|
|
EXPECT_FALSE(fmt::format("{}", std::this_thread::get_id()).empty());
|
|
}
|
|
|
|
TEST(std_test, variant) {
|
|
#ifdef __cpp_lib_variant
|
|
EXPECT_EQ(fmt::format("{}", std::monostate{}), "monostate");
|
|
using V0 = std::variant<int, float, std::string, char>;
|
|
V0 v0(42);
|
|
V0 v1(1.5f);
|
|
V0 v2("hello");
|
|
V0 v3('i');
|
|
EXPECT_EQ(fmt::format("{}", v0), "variant(42)");
|
|
EXPECT_EQ(fmt::format("{}", v1), "variant(1.5)");
|
|
EXPECT_EQ(fmt::format("{}", v2), "variant(\"hello\")");
|
|
EXPECT_EQ(fmt::format("{}", v3), "variant('i')");
|
|
|
|
struct unformattable {};
|
|
EXPECT_FALSE((fmt::is_formattable<unformattable>::value));
|
|
EXPECT_FALSE((fmt::is_formattable<std::variant<unformattable>>::value));
|
|
EXPECT_FALSE((fmt::is_formattable<std::variant<unformattable, int>>::value));
|
|
EXPECT_FALSE((fmt::is_formattable<std::variant<int, unformattable>>::value));
|
|
EXPECT_FALSE(
|
|
(fmt::is_formattable<std::variant<unformattable, unformattable>>::value));
|
|
EXPECT_TRUE((fmt::is_formattable<std::variant<int, float>>::value));
|
|
|
|
using V1 = std::variant<std::monostate, std::string, std::string>;
|
|
V1 v4{};
|
|
V1 v5{std::in_place_index<1>, "yes, this is variant"};
|
|
|
|
EXPECT_EQ(fmt::format("{}", v4), "variant(monostate)");
|
|
EXPECT_EQ(fmt::format("{}", v5), "variant(\"yes, this is variant\")");
|
|
#endif
|
|
}
|