142 lines
3.8 KiB
C++
142 lines
3.8 KiB
C++
// Formatting library for C++ - the core API
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//
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// Copyright (c) 2012 - present, Victor Zverovich
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// All rights reserved.
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//
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// For the license information refer to format.h.
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//
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// Copyright (c) 2018 - present, Remotion (Igor Schulz)
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// All Rights Reserved
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// {fmt} support for ranges, containers and types tuple interface.
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#include "fmt/ranges.h"
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#include "gtest.h"
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// Check if 'if constexpr' is supported.
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#if (__cplusplus > 201402L) || \
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(defined(_MSVC_LANG) && _MSVC_LANG > 201402L && _MSC_VER >= 1910)
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# include <array>
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# include <map>
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# include <string>
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# include <vector>
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TEST(RangesTest, FormatVector) {
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std::vector<int32_t> iv{1, 2, 3, 5, 7, 11};
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auto ivf = fmt::format("{}", iv);
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EXPECT_EQ("{1, 2, 3, 5, 7, 11}", ivf);
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}
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TEST(RangesTest, FormatVector2) {
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std::vector<std::vector<int32_t>> ivv{{1, 2}, {3, 5}, {7, 11}};
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auto ivf = fmt::format("{}", ivv);
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EXPECT_EQ("{{1, 2}, {3, 5}, {7, 11}}", ivf);
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}
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TEST(RangesTest, FormatMap) {
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std::map<std::string, int32_t> simap{{"one", 1}, {"two", 2}};
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EXPECT_EQ("{(\"one\", 1), (\"two\", 2)}", fmt::format("{}", simap));
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}
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TEST(RangesTest, FormatPair) {
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std::pair<int64_t, float> pa1{42, 1.5f};
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EXPECT_EQ("(42, 1.5)", fmt::format("{}", pa1));
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}
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TEST(RangesTest, FormatTuple) {
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std::tuple<int64_t, float, std::string, char> t{42, 1.5f, "this is tuple",
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'i'};
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EXPECT_EQ("(42, 1.5, \"this is tuple\", 'i')", fmt::format("{}", t));
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EXPECT_EQ("()", fmt::format("{}", std::tuple<>()));
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}
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TEST(RangesTest, JoinTuple) {
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// Value tuple args
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std::tuple<char, int, float> t1 = std::make_tuple('a', 1, 2.0f);
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EXPECT_EQ("(a, 1, 2.0)", fmt::format("({})", fmt::join(t1, ", ")));
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// Testing lvalue tuple args
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int x = 4;
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std::tuple<char, int&> t2{'b', x};
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EXPECT_EQ("b + 4", fmt::format("{}", fmt::join(t2, " + ")));
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// Empty tuple
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std::tuple<> t3;
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EXPECT_EQ("", fmt::format("{}", fmt::join(t3, "|")));
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// Single element tuple
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std::tuple<float> t4{4.0f};
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EXPECT_EQ("4.0", fmt::format("{}", fmt::join(t4, "/")));
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}
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TEST(RangesTest, JoinInitializerList) {
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EXPECT_EQ("1, 2, 3", fmt::format("{}", fmt::join({1, 2, 3}, ", ")));
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EXPECT_EQ("fmt rocks !",
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fmt::format("{}", fmt::join({"fmt", "rocks", "!"}, " ")));
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}
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struct my_struct {
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int32_t i;
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std::string str; // can throw
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template <std::size_t N> decltype(auto) get() const noexcept {
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if constexpr (N == 0)
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return i;
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else if constexpr (N == 1)
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return fmt::string_view{str};
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}
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};
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template <std::size_t N> decltype(auto) get(const my_struct& s) noexcept {
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return s.get<N>();
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}
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namespace std {
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template <>
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struct tuple_size<my_struct> : std::integral_constant<std::size_t, 2> {};
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template <std::size_t N> struct tuple_element<N, my_struct> {
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using type = decltype(std::declval<my_struct>().get<N>());
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};
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} // namespace std
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TEST(RangesTest, FormatStruct) {
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my_struct mst{13, "my struct"};
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EXPECT_EQ("(13, \"my struct\")", fmt::format("{}", mst));
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}
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TEST(RangesTest, FormatTo) {
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char buf[10];
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auto end = fmt::format_to(buf, "{}", std::vector{1, 2, 3});
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*end = '\0';
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EXPECT_STREQ(buf, "{1, 2, 3}");
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}
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struct path_like {
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const path_like* begin() const;
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const path_like* end() const;
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operator std::string() const;
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};
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TEST(RangesTest, PathLike) {
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EXPECT_FALSE((fmt::is_range<path_like, char>::value));
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}
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#endif // (__cplusplus > 201402L) || (defined(_MSVC_LANG) && _MSVC_LANG >
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// 201402L && _MSC_VER >= 1910)
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#ifdef FMT_USE_STRING_VIEW
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struct string_like {
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const char* begin();
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const char* end();
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explicit operator fmt::string_view() const { return "foo"; }
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explicit operator std::string_view() const { return "foo"; }
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};
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TEST(RangesTest, FormatStringLike) {
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EXPECT_EQ("foo", fmt::format("{}", string_like()));
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}
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#endif // FMT_USE_STRING_VIEW
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