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Handle exotic character types in compilation

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This commit is contained in:
Victor Zverovich 2020-09-17 06:35:33 -07:00
parent f674434a67
commit 1d696dc280
2 changed files with 11 additions and 3 deletions
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4
include/fmt/compile.h
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@ -637,9 +637,13 @@ template <typename S, typename... Args,
FMT_ENABLE_IF(detail::is_compiled_string<S>::value)>
FMT_INLINE std::basic_string<typename S::char_type> format(const S&,
Args&&... args) {
#ifdef __cpp_if_constexpr
if constexpr (std::is_same<typename S::char_type, char>::value) {
constexpr basic_string_view<typename S::char_type> str = S();
if (str.size() == 2 && str[0] == '{' && str[1] == '}')
return fmt::to_string(detail::first(args...));
}
#endif
constexpr auto compiled = detail::compile<Args...>(S());
return format(compiled, std::forward<Args>(args)...);
}

4
test/compile-test.cc
View File

@ -149,6 +149,10 @@ TEST(CompileTest, FormatDefault) {
EXPECT_EQ("foo", fmt::format(FMT_COMPILE("{}"), test_formattable()));
}
TEST(CompileTest, FormatWideString) {
EXPECT_EQ(L"42", fmt::format(FMT_COMPILE(L"{}"), 42));
}
TEST(CompileTest, FormatSpecs) {
EXPECT_EQ("42", fmt::format(FMT_COMPILE("{:x}"), 0x42));
}