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Simplify compile-time strings

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This commit is contained in:
Victor Zverovich 2018-10-28 06:57:35 -07:00
parent 5ee1a4bc8a
commit bdda4d6030
2 changed files with 19 additions and 19 deletions
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10
include/fmt/core.h
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@ -472,11 +472,11 @@ struct compile_string {};
template <typename S>
struct is_compile_string : std::is_base_of<compile_string, S> {};
template <typename S, typename Enable = typename std::enable_if<is_compile_string<S>::value>::type>
inline auto to_string_view(const S &s) -> basic_string_view<typename S::char_type> {
typedef typename S::char_type char_type;
return basic_string_view<char_type>{s.data(), s.size() - 1};
}
template <
typename S,
typename Enable = typename std::enable_if<is_compile_string<S>::value>::type>
FMT_CONSTEXPR basic_string_view<typename S::char_type>
to_string_view(const S &s) { return s; }
template <typename Context>
class basic_format_arg;

28
include/fmt/format.h
View File

@ -2240,13 +2240,12 @@ FMT_CONSTEXPR bool check_format_string(
return true;
}
template <typename... Args, typename String>
typename std::enable_if<is_compile_string<String>::value>::type
check_format_string(String format_str) {
typedef typename String::char_type char_type;
FMT_CONSTEXPR_DECL bool invalid_format =
internal::check_format_string<char_type, internal::error_handler, Args...>(
basic_string_view<char_type>(format_str.data(), format_str.size()));
template <typename... Args, typename S>
typename std::enable_if<is_compile_string<S>::value>::type
check_format_string(S format_str) {
typedef typename S::char_type char_t;
FMT_CONSTEXPR_DECL bool invalid_format = internal::check_format_string<
char_t, internal::error_handler, Args...>(to_string_view(format_str));
(void)invalid_format;
}
@ -3649,14 +3648,15 @@ operator"" _a(const wchar_t *s, std::size_t) { return {s}; }
FMT_END_NAMESPACE
#define FMT_STRING(s) [] { \
typedef typename std::decay<decltype(s)>::type pointer; \
struct S : fmt::compile_string { \
typedef typename std::remove_cv<std::remove_pointer<pointer>::type>::type char_type;\
static FMT_CONSTEXPR pointer data() { return s; } \
static FMT_CONSTEXPR size_t size() { return sizeof(s) / sizeof(char_type); } \
explicit operator fmt::basic_string_view<char_type>() const { return s; } \
typedef typename std::remove_cv<std::remove_pointer< \
typename std::decay<decltype(s)>::type>::type>::type ct; \
struct str : fmt::compile_string { \
typedef ct char_type; \
FMT_CONSTEXPR operator fmt::basic_string_view<ct>() const { \
return {s, sizeof(s) / sizeof(ct) - 1}; \
} \
}; \
return S{}; \
return str{}; \
}()
#if defined(FMT_STRING_ALIAS) && FMT_STRING_ALIAS