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feat: get user-defined value by constructor

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If a user-defined constructor has constructor(const toml::value&),
then it should be convertible in `toml::get` and `toml::find`.
This commit is contained in:
ToruNiina
2020-01-10 20:38:52 +09:00
parent c153c0e8c3
commit 55260654bf
1 changed files with 20 additions and 0 deletions
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20
toml/get.hpp
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@@ -259,6 +259,15 @@ template<typename T, typename C,
std::size_t S = sizeof(::toml::from<T>)> std::size_t S = sizeof(::toml::from<T>)>
T get(const basic_value<C, M, V>&); T get(const basic_value<C, M, V>&);
// T(const toml::value&) and T is not toml::basic_value
template<typename T, typename C,
template<typename ...> class M, template<typename ...> class V>
detail::enable_if_t<detail::conjunction<
detail::negation<detail::is_basic_value<T>>,
std::is_constructible<T, const basic_value<C, M, V>&>
>::value, T>
get(const basic_value<C, M, V>&);
// ============================================================================ // ============================================================================
// array-like types; most likely STL container, like std::vector, etc. // array-like types; most likely STL container, like std::vector, etc.
@@ -417,6 +426,17 @@ T get(const basic_value<C, M, V>& v)
return ::toml::from<T>::from_toml(v); return ::toml::from<T>::from_toml(v);
} }
template<typename T, typename C,
template<typename ...> class M, template<typename ...> class V>
detail::enable_if_t<detail::conjunction<
detail::negation<detail::is_basic_value<T>>,
std::is_constructible<T, const basic_value<C, M, V>&>
>::value, T>
get(const basic_value<C, M, V>& v)
{
return T(v);
}
// ============================================================================ // ============================================================================
// find // find