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Fix handling of formattable types with to_string_view (#2181)

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This commit is contained in:
Victor Zverovich
2021-03-19 06:43:38 -07:00
parent 6ae402fd0b
commit 14a2a64df4
2 changed files with 28 additions and 2 deletions
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21
test/compile-test.cc
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@ -288,6 +288,27 @@ TEST(CompileTest, UnknownFormatFallback) {
}
TEST(CompileTest, Empty) { EXPECT_EQ("", fmt::format(FMT_COMPILE(""))); }
struct to_stringable {
friend fmt::string_view to_string_view(to_stringable) { return {}; }
};
FMT_BEGIN_NAMESPACE
template <> struct formatter<to_stringable> {
auto parse(format_parse_context& ctx) const -> decltype(ctx.begin()) {
return ctx.begin();
}
template <typename FormatContext>
auto format(const to_stringable&, FormatContext& ctx) -> decltype(ctx.out()) {
return ctx.out();
}
};
FMT_END_NAMESPACE
TEST(CompileTest, ToStringAndFormatter) {
fmt::format(FMT_COMPILE("{}"), to_stringable());
}
#endif
#if FMT_USE_NONTYPE_TEMPLATE_PARAMETERS