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Use decltype(auto) return type for some to_string functions

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Remove explicit return type thats just duplicating the return
expression.
This commit is contained in:
Maxime Coste 2017-08-14 11:29:55 +07:00
parent 1b1239b25a
commit 6aa2388700
1 changed files with 2 additions and 3 deletions
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5
src/string.hh
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@ -399,8 +399,7 @@ InplaceString<23> to_string(float val);
InplaceString<7> to_string(Codepoint c);
template<typename RealType, typename ValueType>
decltype(to_string(std::declval<ValueType>()))
to_string(const StronglyTypedNumber<RealType, ValueType>& val)
decltype(auto) to_string(const StronglyTypedNumber<RealType, ValueType>& val)
{
return to_string((ValueType)val);
}
@ -411,7 +410,7 @@ namespace detail
template<typename T> constexpr bool is_string = std::is_convertible<T, StringView>::value;
template<typename T, class = std::enable_if_t<not is_string<T>>>
auto format_param(const T& val) -> decltype(to_string(val)) { return to_string(val); }
decltype(auto) format_param(const T& val) { return to_string(val); }
template<typename T, class = std::enable_if_t<is_string<T>>>
StringView format_param(const T& val) { return val; }