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Add no_value state to value

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Victor Zverovich 2021-06-15 06:48:00 -07:00
parent e421d52713
commit 427b534054
1 changed files with 6 additions and 2 deletions
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8
include/fmt/core.h
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@ -328,7 +328,9 @@ using remove_cvref_t = typename std::remove_cv<remove_reference_t<T>>::type;
template <typename T> struct type_identity { using type = T; }; template <typename T> struct type_identity { using type = T; };
template <typename T> using type_identity_t = typename type_identity<T>::type; template <typename T> using type_identity_t = typename type_identity<T>::type;
struct monostate {}; struct monostate {
constexpr monostate() {}
};
// An enable_if helper to be used in template parameters which results in much // An enable_if helper to be used in template parameters which results in much
// shorter symbols: https://godbolt.org/z/sWw4vP. Extra parentheses are needed // shorter symbols: https://godbolt.org/z/sWw4vP. Extra parentheses are needed
@ -1131,6 +1133,7 @@ template <typename Context> class value {
using char_type = typename Context::char_type; using char_type = typename Context::char_type;
union { union {
monostate no_value;
int int_value; int int_value;
unsigned uint_value; unsigned uint_value;
long long long_long_value; long long long_long_value;
@ -1148,7 +1151,8 @@ template <typename Context> class value {
named_arg_value<char_type> named_args; named_arg_value<char_type> named_args;
}; };
constexpr FMT_INLINE value(int val = 0) : int_value(val) {} constexpr FMT_INLINE value() : no_value() {}
constexpr FMT_INLINE value(int val) : int_value(val) {}
constexpr FMT_INLINE value(unsigned val) : uint_value(val) {} constexpr FMT_INLINE value(unsigned val) : uint_value(val) {}
constexpr FMT_INLINE value(long long val) : long_long_value(val) {} constexpr FMT_INLINE value(long long val) : long_long_value(val) {}
constexpr FMT_INLINE value(unsigned long long val) : ulong_long_value(val) {} constexpr FMT_INLINE value(unsigned long long val) : ulong_long_value(val) {}