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add get_or

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This commit is contained in:
ToruNiina
2017-12-11 12:04:57 +09:00
parent d1fd42ff7e
commit 3083f65493
3 changed files with 98 additions and 1 deletions
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15
toml/get.hpp
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@@ -14,7 +14,7 @@ inline T get(const toml::value& v)
return static_cast<T>(v.cast<vT>());
}
// array case
// array-like type
template<typename T, toml::value_t vT = toml::detail::check_type<T>(),
typename std::enable_if<(vT == toml::value_t::Unknown) &&
(!toml::detail::is_map<T>::value) &&
@@ -24,6 +24,7 @@ T get(const toml::value& v)
if(v.type() != value_t::Array)
throw type_error("get: value type: " + stringize(v.type()) +
std::string(" is not argument type: Array"));
const auto& ar = v.cast<value_t::Array>();
T tmp;
try
@@ -39,6 +40,7 @@ T get(const toml::value& v)
return tmp;
}
// table-like case
template<typename T, toml::value_t vT = toml::detail::check_type<T>(),
typename std::enable_if<(vT == toml::value_t::Unknown) &&
toml::detail::is_map<T>::value, std::nullptr_t>::type = nullptr>
@@ -53,5 +55,16 @@ T get(const toml::value& v)
return tmp;
}
// get_or -----------------------------------------------------------------
template<typename T>
inline typename std::remove_cv<typename std::remove_reference<T>::type>::type
get_or(const toml::Table& tab, const toml::key& ky, T&& opt)
{
if(tab.count(ky) == 0) {return std::forward<T>(opt);}
return get<typename std::remove_cv<
typename std::remove_reference<T>::type>::type>(tab.find(ky)->second);
}
} // toml
#endif// TOML11_GET