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Don't confuse Glib::ustring with std::string

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This commit is contained in:
Victor Zverovich 2024-07-06 13:16:32 -07:00
parent b50e685db9
commit 7a8b54a0ef
2 changed files with 24 additions and 1 deletions
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3
include/fmt/base.h
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@ -441,7 +441,8 @@ struct is_std_string_like : std::false_type {};
template <typename T>
struct is_std_string_like<T, void_t<decltype(std::declval<T>().find_first_of(
typename T::value_type(), 0))>>
: std::true_type {};
: std::is_convertible<decltype(std::declval<T>().data()),
const typename T::value_type*> {};
// Returns true iff the literal encoding is UTF-8.
constexpr auto is_utf8_enabled() -> bool {

22
test/format-test.cc
View File

@ -2420,3 +2420,25 @@ TEST(format_test, formatter_overrides_implicit_conversion) {
EXPECT_EQ(fmt::format("{}", convertible_to_int()), "x");
EXPECT_EQ(fmt::format("{}", convertible_to_cstring()), "y");
}
struct ustring {
using value_type = unsigned;
auto find_first_of(value_type, size_t) const -> size_t;
auto data() const -> const char*;
auto size() const -> size_t;
};
FMT_BEGIN_NAMESPACE
template <> struct formatter<ustring> : formatter<std::string> {
auto format(const ustring&, format_context& ctx) const
-> decltype(ctx.out()) {
return formatter<std::string>::format("ustring", ctx);
}
};
FMT_END_NAMESPACE
TEST(format_test, ustring) {
EXPECT_EQ(fmt::format("{}", ustring()), "ustring");
}