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Fix handling of mapped types in compile checks (#1200)

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This commit is contained in:
Victor Zverovich 2019-06-16 16:06:06 -07:00
parent 4639843839
commit 4912cff65d
2 changed files with 17 additions and 6 deletions
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12
include/fmt/format.h
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@ -2096,10 +2096,14 @@ FMT_CONSTEXPR void parse_format_string(basic_string_view<Char> format_str,
template <typename T, typename ParseContext>
FMT_CONSTEXPR const typename ParseContext::char_type* parse_format_specs(
ParseContext& ctx) {
// GCC 7.2 requires initializer.
typedef typename ParseContext::char_type char_type;
conditional_t<has_formatter<T, buffer_context<char_type>>::value,
formatter<T, char_type>,
using char_type = typename ParseContext::char_type;
using context = buffer_context<char_type>;
using mapped_type =
conditional_t<internal::mapped_type_constant<T, context>::value !=
internal::custom_type,
decltype(arg_mapper<context>().map(std::declval<T>())), T>;
conditional_t<has_formatter<mapped_type, context>::value,
formatter<mapped_type, char_type>,
internal::fallback_formatter<T, char_type>>
f;
return f.parse(ctx);

11
test/format-test.cc
View File

@ -1836,6 +1836,15 @@ TEST(FormatTest, UnpackedArgs) {
6, 7, 8, 9, 'a', 'b', 'c', 'd', 'e', 'f', 'g'));
}
struct string_like {};
fmt::string_view to_string_view(string_like) { return "foo"; }
TEST(FormatTest, CompileTimeString) {
EXPECT_EQ("42", fmt::format(FMT_STRING("{}"), 42));
EXPECT_EQ(L"42", fmt::format(FMT_STRING(L"{}"), 42));
EXPECT_EQ("foo", fmt::format(FMT_STRING("{}"), string_like()));
}
#if FMT_USE_USER_DEFINED_LITERALS
// Passing user-defined literals directly to EXPECT_EQ causes problems
// with macro argument stringification (#) on some versions of GCC.
@ -1867,8 +1876,6 @@ TEST(LiteralsTest, NamedArg) {
TEST(FormatTest, UdlTemplate) {
EXPECT_EQ("foo", "foo"_format());
EXPECT_EQ(" 42", "{0:10}"_format(42));
EXPECT_EQ("42", fmt::format(FMT_STRING("{}"), 42));
EXPECT_EQ(L"42", fmt::format(FMT_STRING(L"{}"), 42));
}
#endif // FMT_USE_USER_DEFINED_LITERALS