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256 lines
7.1 KiB
C++
256 lines
7.1 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, FormatArray) {
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int32_t ia[] = {1, 2, 3, 5, 7, 11};
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auto iaf = fmt::format("{}", ia);
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EXPECT_EQ("{1, 2, 3, 5, 7, 11}", iaf);
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}
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TEST(RangesTest, Format2dArray) {
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int32_t ia[][2] = {{1, 2}, {3, 5}, {7, 11}};
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auto iaf = fmt::format("{}", ia);
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EXPECT_EQ("{{1, 2}, {3, 5}, {7, 11}}", iaf);
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}
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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)", 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", 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 <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 <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 <> struct tuple_size<my_struct> : std::integral_constant<size_t, 2> {};
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template <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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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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TEST(RangesTest, JoinSentinel) {
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zstring hello{"hello"};
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EXPECT_EQ("{'h', 'e', 'l', 'l', 'o'}", fmt::format("{}", hello));
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EXPECT_EQ("h_e_l_l_o", fmt::format("{}", fmt::join(hello, "_")));
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}
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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 (eg 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(RangesTest, JoinRange) {
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noncopyable_range<int> w(3u, 0);
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EXPECT_EQ("0,0,0", fmt::format("{}", fmt::join(w, ",")));
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EXPECT_EQ("0,0,0",
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fmt::format("{}", fmt::join(noncopyable_range<int>(3u, 0), ",")));
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non_const_only_range<int> x(3u, 0);
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EXPECT_EQ("0,0,0", fmt::format("{}", fmt::join(x, ",")));
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EXPECT_EQ(
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"0,0,0",
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fmt::format("{}", fmt::join(non_const_only_range<int>(3u, 0), ",")));
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std::vector<int> y(3u, 0);
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EXPECT_EQ("0,0,0", fmt::format("{}", fmt::join(y, ",")));
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EXPECT_EQ("0,0,0",
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fmt::format("{}", fmt::join(std::vector<int>(3u, 0), ",")));
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const std::vector<int> z(3u, 0);
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EXPECT_EQ("0,0,0", fmt::format("{}", fmt::join(z, ",")));
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}
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TEST(RangesTest, Range) {
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noncopyable_range<int> w(3u, 0);
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EXPECT_EQ("{0, 0, 0}", fmt::format("{}", w));
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EXPECT_EQ("{0, 0, 0}", fmt::format("{}", noncopyable_range<int>(3u, 0)));
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non_const_only_range<int> x(3u, 0);
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EXPECT_EQ("{0, 0, 0}", fmt::format("{}", x));
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EXPECT_EQ("{0, 0, 0}", fmt::format("{}", non_const_only_range<int>(3u, 0)));
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std::vector<int> y(3u, 0);
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EXPECT_EQ("{0, 0, 0}", fmt::format("{}", y));
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EXPECT_EQ("{0, 0, 0}", fmt::format("{}", std::vector<int>(3u, 0)));
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const std::vector<int> z(3u, 0);
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EXPECT_EQ("{0, 0, 0}", fmt::format("{}", z));
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}
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#if !FMT_MSC_VER || FMT_MSC_VER >= 1927
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struct unformattable {};
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TEST(RangesTest, UnformattableRange) {
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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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