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Make compile work with user-defined types

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This commit is contained in:
Victor Zverovich 2019-09-01 11:48:01 -07:00
parent f18a3f36a7
commit 22e98a5b6a
2 changed files with 18 additions and 8 deletions
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12
include/fmt/compile.h
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@ -173,8 +173,6 @@ class compiled_format {
compiled_format() = delete;
using context = buffer_context<char_type>;
template <typename Range, typename Context>
auto vformat_to(Range out, basic_format_args<Context> args) const ->
typename Context::iterator {
@ -203,8 +201,7 @@ class compiled_format {
case format_part_t::kind::arg_name: {
advance_parse_context_to_specification(parse_ctx, part);
const auto named_arg_id = value.str;
format_arg<Range>(parse_ctx, ctx, named_arg_id);
format_arg<Range>(parse_ctx, ctx, value.str);
} break;
case format_part_t::kind::replacement: {
const auto& arg_id_value = value.repl.arg_id.val;
@ -242,10 +239,8 @@ class compiled_format {
template <typename Range, typename Context, typename Id>
void format_arg(basic_parse_context<char_type>& parse_ctx, Context& ctx,
Id arg_id) const {
parse_ctx.check_arg_id(arg_id);
const auto stopped_at =
visit_format_arg(arg_formatter<Range>(ctx), ctx.arg(arg_id));
ctx.advance_to(stopped_at);
ctx.advance_to(visit_format_arg(arg_formatter<Range>(ctx, &parse_ctx),
ctx.arg(arg_id)));
}
template <typename Char>
@ -359,6 +354,7 @@ FMT_CONSTEXPR auto compile(S format_str)
}
#endif
// Compiles the format string which must be a string literal.
template <typename... Args, typename Char, size_t N>
auto compile(const Char (&format_str)[N]) -> internal::compiled_format<
std::basic_string<Char>, internal::runtime_parts_provider<Char>, Args...> {

14
test/compile-test.cc
View File

@ -152,3 +152,17 @@ TEST(CompileTest, FormattedSize) {
auto f = fmt::compile<int>("{:10}");
EXPECT_EQ(fmt::formatted_size(f, 42), 10);
}
struct formattable {};
template <>
struct fmt::formatter<formattable> : formatter<const char*> {
auto format(formattable, format_context& ctx) -> decltype(ctx.out()) {
return formatter<const char*>::format("foo", ctx);
}
};
TEST(CompileTest, FormatUserDefinedType) {
auto f = fmt::compile<formattable>("{}");
EXPECT_EQ(fmt::format(f, formattable()), "foo");
}