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Make formatter specializations override implicit conversions

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This commit is contained in:
Victor Zverovich
2019-06-07 06:25:46 -07:00
parent 3fdba04924
commit b3cf8613b1
2 changed files with 29 additions and 2 deletions
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19
test/core-test.cc
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@@ -442,6 +442,25 @@ TEST(CoreTest, ConvertToInt) {
EXPECT_TRUE((fmt::convert_to_int<enum_with_underlying_type, char>::value));
}
struct convertible_to_int {
operator int() const { return 42; }
};
FMT_BEGIN_NAMESPACE
template <> struct formatter<convertible_to_int> {
auto parse(format_parse_context& ctx) -> decltype(ctx.begin()) {
return ctx.begin();
}
auto format(convertible_to_int, format_context& ctx) -> decltype(ctx.out()) {
return std::copy_n("foo", 3, ctx.out());
}
};
FMT_END_NAMESPACE
TEST(CoreTest, FormatterOverridesImplicitConversion) {
EXPECT_EQ(fmt::format("{}", convertible_to_int()), "foo");
}
namespace my_ns {
template <typename Char> class my_string {
public: