External/fmt
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more meaningful names for SFINAE

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This commit is contained in:
Daumantas Kavolis 2019-09-26 15:34:29 +01:00
parent 4b8f8fac96
commit cea6bc09c2
1 changed files with 35 additions and 14 deletions
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49
include/fmt/compile.h
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@ -326,6 +326,17 @@ class compiled_format : private compiled_format_base<S> {
: compiled_format_base<S>(format_str), format_str_(format_str) {} : compiled_format_base<S>(format_str), format_str_(format_str) {}
}; };
template <typename T>
struct is_runtime_compiled_format
: std::is_base_of<internal::basic_compiled_format, T> {};
template <typename T> struct is_constexpr_compiled_format : std::false_type {};
template <typename T> struct is_compiled_format {
constexpr static bool value = is_runtime_compiled_format<T>::value ||
is_constexpr_compiled_format<T>::value;
};
#ifdef __cpp_if_constexpr #ifdef __cpp_if_constexpr
template <typename... Args> struct type_list {}; template <typename... Args> struct type_list {};
@ -473,6 +484,13 @@ constexpr auto compile_format_string(S format_str) {
format_str); format_str);
} }
} }
template <typename L, typename R>
struct is_constexpr_compiled_format<concat<L, R>> : std::true_type {};
template <typename Char>
struct is_constexpr_compiled_format<text<Char>> : std::true_type {};
#endif // __cpp_if_constexpr #endif // __cpp_if_constexpr
} // namespace internal } // namespace internal
@ -499,8 +517,8 @@ constexpr auto compile(S format_str) {
template <typename CompiledFormat, typename... Args, template <typename CompiledFormat, typename... Args,
typename Char = typename CompiledFormat::char_type, typename Char = typename CompiledFormat::char_type,
FMT_ENABLE_IF(!std::is_base_of<internal::basic_compiled_format, FMT_ENABLE_IF(
CompiledFormat>::value)> internal::is_constexpr_compiled_format<CompiledFormat>::value)>
std::basic_string<Char> format(const CompiledFormat& cf, const Args&... args) { std::basic_string<Char> format(const CompiledFormat& cf, const Args&... args) {
basic_memory_buffer<Char> buffer; basic_memory_buffer<Char> buffer;
using range = buffer_range<Char>; using range = buffer_range<Char>;
@ -510,8 +528,8 @@ std::basic_string<Char> format(const CompiledFormat& cf, const Args&... args) {
} }
template <typename OutputIt, typename CompiledFormat, typename... Args, template <typename OutputIt, typename CompiledFormat, typename... Args,
FMT_ENABLE_IF(!std::is_base_of<internal::basic_compiled_format, FMT_ENABLE_IF(
CompiledFormat>::value)> internal::is_constexpr_compiled_format<CompiledFormat>::value)>
OutputIt format_to(OutputIt out, const CompiledFormat& cf, OutputIt format_to(OutputIt out, const CompiledFormat& cf,
const Args&... args) { const Args&... args) {
return cf.format(out, args...); return cf.format(out, args...);
@ -533,10 +551,10 @@ auto compile(const Char (&format_str)[N])
basic_string_view<Char>(format_str, N - 1)); basic_string_view<Char>(format_str, N - 1));
} }
template <typename CompiledFormat, typename... Args, template <
typename Char = typename CompiledFormat::char_type, typename CompiledFormat, typename... Args,
FMT_ENABLE_IF(std::is_base_of<internal::basic_compiled_format, typename Char = typename CompiledFormat::char_type,
CompiledFormat>::value)> FMT_ENABLE_IF(internal::is_runtime_compiled_format<CompiledFormat>::value)>
std::basic_string<Char> format(const CompiledFormat& cf, const Args&... args) { std::basic_string<Char> format(const CompiledFormat& cf, const Args&... args) {
basic_memory_buffer<Char> buffer; basic_memory_buffer<Char> buffer;
using range = buffer_range<Char>; using range = buffer_range<Char>;
@ -546,9 +564,9 @@ std::basic_string<Char> format(const CompiledFormat& cf, const Args&... args) {
return to_string(buffer); return to_string(buffer);
} }
template <typename OutputIt, typename CompiledFormat, typename... Args, template <
FMT_ENABLE_IF(std::is_base_of<internal::basic_compiled_format, typename OutputIt, typename CompiledFormat, typename... Args,
CompiledFormat>::value)> FMT_ENABLE_IF(internal::is_runtime_compiled_format<CompiledFormat>::value)>
OutputIt format_to(OutputIt out, const CompiledFormat& cf, OutputIt format_to(OutputIt out, const CompiledFormat& cf,
const Args&... args) { const Args&... args) {
using char_type = typename CompiledFormat::char_type; using char_type = typename CompiledFormat::char_type;
@ -558,8 +576,10 @@ OutputIt format_to(OutputIt out, const CompiledFormat& cf,
range(out), cf, {make_format_args<context>(args...)}); range(out), cf, {make_format_args<context>(args...)});
} }
template <typename OutputIt, typename CompiledFormat, typename... Args, template <
FMT_ENABLE_IF(internal::is_output_iterator<OutputIt>::value)> typename OutputIt, typename CompiledFormat, typename... Args,
FMT_ENABLE_IF(internal::is_output_iterator<OutputIt>::value&&
internal::is_compiled_format<CompiledFormat>::value)>
format_to_n_result<OutputIt> format_to_n(OutputIt out, size_t n, format_to_n_result<OutputIt> format_to_n(OutputIt out, size_t n,
const CompiledFormat& cf, const CompiledFormat& cf,
const Args&... args) { const Args&... args) {
@ -568,7 +588,8 @@ format_to_n_result<OutputIt> format_to_n(OutputIt out, size_t n,
return {it.base(), it.count()}; return {it.base(), it.count()};
} }
template <typename CompiledFormat, typename... Args> template <typename CompiledFormat, typename... Args,
FMT_ENABLE_IF(internal::is_compiled_format<CompiledFormat>::value)>
std::size_t formatted_size(const CompiledFormat& cf, const Args&... args) { std::size_t formatted_size(const CompiledFormat& cf, const Args&... args) {
return format_to( return format_to(
internal::counting_iterator<typename CompiledFormat::char_type>(), internal::counting_iterator<typename CompiledFormat::char_type>(),