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fix formatting with empty compiled format string (#2042)

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This commit is contained in:
Alexey Ochapov 2020-12-02 18:14:57 +03:00 committed by GitHub
parent f43416e1d7
commit 683a74501f
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GPG Key ID: 4AEE18F83AFDEB23
2 changed files with 5 additions and 1 deletions
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2
include/fmt/compile.h
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@ -643,7 +643,7 @@ FMT_INLINE std::basic_string<typename S::char_type> format(const S&,
#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] == '}')
if constexpr (str.size() == 2 && str[0] == '{' && str[1] == '}')
return fmt::to_string(detail::first(args...));
}
#endif

4
test/compile-test.cc
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@ -173,6 +173,10 @@ TEST(CompileTest, TextAndArg) {
EXPECT_EQ(">>>42<<<", fmt::format(FMT_COMPILE(">>>{}<<<"), 42));
EXPECT_EQ("42!", fmt::format(FMT_COMPILE("{}!"), 42));
}
TEST(CompileTest, Empty) {
EXPECT_EQ("", fmt::format(FMT_COMPILE("")));
}
#endif
#if __cplusplus >= 202002L