mirror of
https://github.com/fmtlib/fmt.git
synced 2024-12-26 09:28:21 +00:00
425 lines
13 KiB
C++
425 lines
13 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 <map>
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#include <string>
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#include <vector>
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#include "gtest/gtest.h"
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#if !FMT_GCC_VERSION || FMT_GCC_VERSION >= 601
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# define FMT_RANGES_TEST_ENABLE_C_STYLE_ARRAY
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#endif
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#if !FMT_MSC_VERSION || FMT_MSC_VERSION > 1910
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# define FMT_RANGES_TEST_ENABLE_JOIN
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# define FMT_RANGES_TEST_ENABLE_FORMAT_STRUCT
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#endif
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#ifdef FMT_RANGES_TEST_ENABLE_C_STYLE_ARRAY
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TEST(ranges_test, format_array) {
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int arr[] = {1, 2, 3, 5, 7, 11};
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EXPECT_EQ(fmt::format("{}", arr), "[1, 2, 3, 5, 7, 11]");
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}
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TEST(ranges_test, format_2d_array) {
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int arr[][2] = {{1, 2}, {3, 5}, {7, 11}};
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EXPECT_EQ(fmt::format("{}", arr), "[[1, 2], [3, 5], [7, 11]]");
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}
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TEST(ranges_test, format_array_of_literals) {
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const char* arr[] = {"1234", "abcd"};
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EXPECT_EQ(fmt::format("{}", arr), "[\"1234\", \"abcd\"]");
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EXPECT_EQ(fmt::format("{:n}", arr), "\"1234\", \"abcd\"");
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EXPECT_EQ(fmt::format("{:n:}", arr), "1234, abcd");
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}
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#endif // FMT_RANGES_TEST_ENABLE_C_STYLE_ARRAY
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TEST(ranges_test, format_vector) {
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auto v = std::vector<int>{1, 2, 3, 5, 7, 11};
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EXPECT_EQ(fmt::format("{}", v), "[1, 2, 3, 5, 7, 11]");
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EXPECT_EQ(fmt::format("{::#x}", v), "[0x1, 0x2, 0x3, 0x5, 0x7, 0xb]");
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EXPECT_EQ(fmt::format("{:n:#x}", v), "0x1, 0x2, 0x3, 0x5, 0x7, 0xb");
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}
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TEST(ranges_test, format_vector2) {
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auto v = std::vector<std::vector<int>>{{1, 2}, {3, 5}, {7, 11}};
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EXPECT_EQ(fmt::format("{}", v), "[[1, 2], [3, 5], [7, 11]]");
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EXPECT_EQ(fmt::format("{:::#x}", v), "[[0x1, 0x2], [0x3, 0x5], [0x7, 0xb]]");
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EXPECT_EQ(fmt::format("{:n:n:#x}", v), "0x1, 0x2, 0x3, 0x5, 0x7, 0xb");
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}
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TEST(ranges_test, format_map) {
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auto m = std::map<std::string, int>{{"one", 1}, {"two", 2}};
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EXPECT_EQ(fmt::format("{}", m), "{\"one\": 1, \"two\": 2}");
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EXPECT_EQ(fmt::format("{:n}", m), "\"one\": 1, \"two\": 2");
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}
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TEST(ranges_test, format_set) {
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EXPECT_EQ(fmt::format("{}", std::set<std::string>{"one", "two"}),
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"{\"one\", \"two\"}");
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}
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namespace adl {
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struct box {
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int value;
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};
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auto begin(const box& b) -> const int* { return &b.value; }
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auto end(const box& b) -> const int* { return &b.value + 1; }
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} // namespace adl
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TEST(ranges_test, format_adl_begin_end) {
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auto b = adl::box{42};
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EXPECT_EQ(fmt::format("{}", b), "[42]");
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}
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TEST(ranges_test, format_pair) {
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auto p = std::pair<int, float>(42, 1.5f);
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EXPECT_EQ(fmt::format("{}", p), "(42, 1.5)");
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}
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struct unformattable {};
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TEST(ranges_test, format_tuple) {
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auto t =
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std::tuple<int, float, std::string, char>(42, 1.5f, "this is tuple", 'i');
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EXPECT_EQ(fmt::format("{}", t), "(42, 1.5, \"this is tuple\", 'i')");
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EXPECT_EQ(fmt::format("{}", std::tuple<>()), "()");
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EXPECT_TRUE((fmt::is_formattable<std::tuple<>>::value));
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EXPECT_FALSE((fmt::is_formattable<unformattable>::value));
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EXPECT_FALSE((fmt::is_formattable<std::tuple<unformattable>>::value));
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EXPECT_FALSE((fmt::is_formattable<std::tuple<unformattable, int>>::value));
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EXPECT_FALSE((fmt::is_formattable<std::tuple<int, unformattable>>::value));
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EXPECT_FALSE(
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(fmt::is_formattable<std::tuple<unformattable, unformattable>>::value));
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EXPECT_TRUE((fmt::is_formattable<std::tuple<int, float>>::value));
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}
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#ifdef FMT_RANGES_TEST_ENABLE_FORMAT_STRUCT
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struct tuple_like {
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int i;
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std::string str;
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template <size_t N> fmt::enable_if_t<N == 0, int> get() const noexcept {
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return i;
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}
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template <size_t N>
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fmt::enable_if_t<N == 1, fmt::string_view> get() const noexcept {
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return str;
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}
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};
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template <size_t N>
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auto get(const tuple_like& t) noexcept -> decltype(t.get<N>()) {
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return t.get<N>();
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}
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namespace std {
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template <>
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struct tuple_size<tuple_like> : std::integral_constant<size_t, 2> {};
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template <size_t N> struct tuple_element<N, tuple_like> {
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using type = decltype(std::declval<tuple_like>().get<N>());
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};
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} // namespace std
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TEST(ranges_test, format_struct) {
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auto t = tuple_like{42, "foo"};
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EXPECT_EQ(fmt::format("{}", t), "(42, \"foo\")");
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}
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#endif // FMT_RANGES_TEST_ENABLE_FORMAT_STRUCT
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TEST(ranges_test, format_to) {
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char buf[10];
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auto end = fmt::format_to(buf, "{}", std::vector<int>{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(ranges_test, path_like) {
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EXPECT_FALSE((fmt::is_range<path_like, char>::value));
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}
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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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operator fmt::string_view() const { return "foo"; }
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operator std::string_view() const { return "foo"; }
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};
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TEST(ranges_test, format_string_like) {
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EXPECT_EQ(fmt::format("{}", string_like()), "foo");
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}
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#endif // FMT_USE_STRING_VIEW
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// A range that provides non-const only begin()/end() to test fmt::join handles
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// that.
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//
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// Some ranges (e.g. those produced by range-v3's views::filter()) can cache
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// information during iteration so they only provide non-const begin()/end().
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template <typename T> class non_const_only_range {
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private:
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std::vector<T> vec;
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public:
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using const_iterator = typename ::std::vector<T>::const_iterator;
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template <typename... Args>
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explicit non_const_only_range(Args&&... args)
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: vec(std::forward<Args>(args)...) {}
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const_iterator begin() { return vec.begin(); }
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const_iterator end() { return vec.end(); }
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};
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template <typename T> class noncopyable_range {
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private:
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std::vector<T> vec;
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public:
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using const_iterator = typename ::std::vector<T>::const_iterator;
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template <typename... Args>
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explicit noncopyable_range(Args&&... args)
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: vec(std::forward<Args>(args)...) {}
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noncopyable_range(noncopyable_range const&) = delete;
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noncopyable_range(noncopyable_range&) = delete;
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const_iterator begin() const { return vec.begin(); }
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const_iterator end() const { return vec.end(); }
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};
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TEST(ranges_test, range) {
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noncopyable_range<int> w(3u, 0);
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EXPECT_EQ(fmt::format("{}", w), "[0, 0, 0]");
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EXPECT_EQ(fmt::format("{}", noncopyable_range<int>(3u, 0)), "[0, 0, 0]");
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non_const_only_range<int> x(3u, 0);
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EXPECT_EQ(fmt::format("{}", x), "[0, 0, 0]");
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EXPECT_EQ(fmt::format("{}", non_const_only_range<int>(3u, 0)), "[0, 0, 0]");
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auto y = std::vector<int>(3u, 0);
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EXPECT_EQ(fmt::format("{}", y), "[0, 0, 0]");
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EXPECT_EQ(fmt::format("{}", std::vector<int>(3u, 0)), "[0, 0, 0]");
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const auto z = std::vector<int>(3u, 0);
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EXPECT_EQ(fmt::format("{}", z), "[0, 0, 0]");
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}
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enum test_enum { foo };
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auto format_as(test_enum e) -> int { return e; }
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TEST(ranges_test, enum_range) {
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auto v = std::vector<test_enum>{test_enum::foo};
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EXPECT_EQ(fmt::format("{}", v), "[0]");
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}
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#if !FMT_MSC_VERSION
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TEST(ranges_test, unformattable_range) {
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EXPECT_FALSE((fmt::has_formatter<std::vector<unformattable>,
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fmt::format_context>::value));
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}
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#endif
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#ifdef FMT_RANGES_TEST_ENABLE_JOIN
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TEST(ranges_test, join_tuple) {
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// Value tuple args.
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auto t1 = std::tuple<char, int, float>('a', 1, 2.0f);
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EXPECT_EQ(fmt::format("({})", fmt::join(t1, ", ")), "(a, 1, 2)");
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// Testing lvalue tuple args.
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int x = 4;
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auto t2 = std::tuple<char, int&>('b', x);
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EXPECT_EQ(fmt::format("{}", fmt::join(t2, " + ")), "b + 4");
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// Empty tuple.
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auto t3 = std::tuple<>();
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EXPECT_EQ(fmt::format("{}", fmt::join(t3, "|")), "");
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// Single element tuple.
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auto t4 = std::tuple<float>(4.0f);
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EXPECT_EQ(fmt::format("{}", fmt::join(t4, "/")), "4");
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# if FMT_TUPLE_JOIN_SPECIFIERS
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// Specs applied to each element.
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auto t5 = std::tuple<int, int, long>(-3, 100, 1);
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EXPECT_EQ(fmt::format("{:+03}", fmt::join(t5, ", ")), "-03, +100, +01");
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auto t6 = std::tuple<float, double, long double>(3, 3.14, 3.1415);
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EXPECT_EQ(fmt::format("{:5.5f}", fmt::join(t6, ", ")),
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"3.00000, 3.14000, 3.14150");
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// Testing lvalue tuple args.
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int y = -1;
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auto t7 = std::tuple<int, int&, const int&>(3, y, y);
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EXPECT_EQ(fmt::format("{:03}", fmt::join(t7, ", ")), "003, -01, -01");
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# endif
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}
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TEST(ranges_test, join_initializer_list) {
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EXPECT_EQ(fmt::format("{}", fmt::join({1, 2, 3}, ", ")), "1, 2, 3");
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EXPECT_EQ(fmt::format("{}", fmt::join({"fmt", "rocks", "!"}, " ")),
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"fmt rocks !");
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}
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struct zstring_sentinel {};
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bool operator==(const char* p, zstring_sentinel) { return *p == '\0'; }
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bool operator!=(const char* p, zstring_sentinel) { return *p != '\0'; }
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struct zstring {
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const char* p;
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const char* begin() const { return p; }
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zstring_sentinel end() const { return {}; }
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};
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# ifdef __cpp_lib_ranges
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struct cpp20_only_range {
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struct iterator {
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int val = 0;
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using value_type = int;
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using difference_type = std::ptrdiff_t;
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using iterator_concept = std::input_iterator_tag;
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iterator() = default;
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iterator(int i) : val(i) {}
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int operator*() const { return val; }
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iterator& operator++() {
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++val;
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return *this;
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}
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void operator++(int) { ++*this; }
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bool operator==(const iterator& rhs) const { return val == rhs.val; }
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};
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int lo;
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int hi;
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iterator begin() const { return iterator(lo); }
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iterator end() const { return iterator(hi); }
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};
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static_assert(std::input_iterator<cpp20_only_range::iterator>);
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# endif
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TEST(ranges_test, join_sentinel) {
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auto hello = zstring{"hello"};
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EXPECT_EQ(fmt::format("{}", hello), "['h', 'e', 'l', 'l', 'o']");
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EXPECT_EQ(fmt::format("{::}", hello), "[h, e, l, l, o]");
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EXPECT_EQ(fmt::format("{}", fmt::join(hello, "_")), "h_e_l_l_o");
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}
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TEST(ranges_test, join_range) {
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noncopyable_range<int> w(3u, 0);
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EXPECT_EQ(fmt::format("{}", fmt::join(w, ",")), "0,0,0");
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EXPECT_EQ(fmt::format("{}", fmt::join(noncopyable_range<int>(3u, 0), ",")),
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"0,0,0");
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non_const_only_range<int> x(3u, 0);
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EXPECT_EQ(fmt::format("{}", fmt::join(x, ",")), "0,0,0");
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EXPECT_EQ(fmt::format("{}", fmt::join(non_const_only_range<int>(3u, 0), ",")),
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"0,0,0");
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auto y = std::vector<int>(3u, 0);
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EXPECT_EQ(fmt::format("{}", fmt::join(y, ",")), "0,0,0");
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EXPECT_EQ(fmt::format("{}", fmt::join(std::vector<int>(3u, 0), ",")),
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"0,0,0");
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const auto z = std::vector<int>(3u, 0);
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EXPECT_EQ(fmt::format("{}", fmt::join(z, ",")), "0,0,0");
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# ifdef __cpp_lib_ranges
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EXPECT_EQ(fmt::format("{}", cpp20_only_range{.lo = 0, .hi = 5}),
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"[0, 1, 2, 3, 4]");
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EXPECT_EQ(
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fmt::format("{}", fmt::join(cpp20_only_range{.lo = 0, .hi = 5}, ",")),
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"0,1,2,3,4");
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# endif
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}
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#endif // FMT_RANGES_TEST_ENABLE_JOIN
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TEST(ranges_test, is_printable) {
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using fmt::detail::is_printable;
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EXPECT_TRUE(is_printable(0x0323));
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EXPECT_FALSE(is_printable(0x0378));
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EXPECT_FALSE(is_printable(0x110000));
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}
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TEST(ranges_test, escape_string) {
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using vec = std::vector<std::string>;
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EXPECT_EQ(fmt::format("{}", vec{"\n\r\t\"\\"}), "[\"\\n\\r\\t\\\"\\\\\"]");
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EXPECT_EQ(fmt::format("{}", vec{"\x07"}), "[\"\\x07\"]");
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EXPECT_EQ(fmt::format("{}", vec{"\x7f"}), "[\"\\x7f\"]");
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EXPECT_EQ(fmt::format("{}", vec{"n\xcc\x83"}), "[\"n\xcc\x83\"]");
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if (fmt::detail::is_utf8()) {
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EXPECT_EQ(fmt::format("{}", vec{"\xcd\xb8"}), "[\"\\u0378\"]");
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// Unassigned Unicode code points.
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EXPECT_EQ(fmt::format("{}", vec{"\xf0\xaa\x9b\x9e"}), "[\"\\U0002a6de\"]");
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// Broken utf-8.
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EXPECT_EQ(fmt::format("{}", vec{"\xf4\x8f\xbf\xc0"}),
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"[\"\\xf4\\x8f\\xbf\\xc0\"]");
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EXPECT_EQ(fmt::format("{}", vec{"\xf0\x28"}), "[\"\\xf0(\"]");
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EXPECT_EQ(fmt::format("{}", vec{"\xe1\x28"}), "[\"\\xe1(\"]");
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EXPECT_EQ(fmt::format("{}", vec{std::string("\xf0\x28\0\0anything", 12)}),
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"[\"\\xf0(\\x00\\x00anything\"]");
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// Correct utf-8.
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EXPECT_EQ(fmt::format("{}", vec{"понедельник"}), "[\"понедельник\"]");
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}
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}
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#ifdef FMT_USE_STRING_VIEW
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struct convertible_to_string_view {
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operator std::string_view() const { return "foo"; }
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};
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TEST(ranges_test, escape_convertible_to_string_view) {
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EXPECT_EQ(fmt::format("{}", std::vector<convertible_to_string_view>(1)),
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"[\"foo\"]");
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}
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#endif // FMT_USE_STRING_VIEW
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template <typename R> struct fmt_ref_view {
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R* r;
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auto begin() const -> decltype(r->begin()) { return r->begin(); }
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auto end() const -> decltype(r->end()) { return r->end(); }
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};
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TEST(ranges_test, range_of_range_of_mixed_const) {
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std::vector<std::vector<int>> v = {{1, 2, 3}, {4, 5}};
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EXPECT_EQ(fmt::format("{}", v), "[[1, 2, 3], [4, 5]]");
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fmt_ref_view<decltype(v)> r{&v};
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EXPECT_EQ(fmt::format("{}", r), "[[1, 2, 3], [4, 5]]");
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}
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TEST(ranges_test, vector_char) {
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EXPECT_EQ(fmt::format("{}", std::vector<char>{'a', 'b'}), "['a', 'b']");
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}
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