mirror of
https://github.com/ToruNiina/toml11.git
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71 lines
2.2 KiB
C++
71 lines
2.2 KiB
C++
#ifndef TOML11_GET
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#define TOML11_GET
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#include "value.hpp"
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#include <algorithm>
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namespace toml
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{
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template<typename T, toml::value_t vT = toml::detail::check_type<T>(),
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typename std::enable_if<(vT != toml::value_t::Unknown &&
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vT != value_t::Empty), std::nullptr_t>::type = nullptr>
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inline T get(const toml::value& v)
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{
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return static_cast<T>(v.cast<vT>());
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}
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// array-like type
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template<typename T, toml::value_t vT = toml::detail::check_type<T>(),
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typename std::enable_if<(vT == toml::value_t::Unknown) &&
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(!toml::detail::is_map<T>::value) &&
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toml::detail::is_container<T>::value, std::nullptr_t>::type = nullptr>
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T get(const toml::value& v)
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{
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if(v.type() != value_t::Array)
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throw type_error("get: value type: " + stringize(v.type()) +
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std::string(" is not argument type: Array"));
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const auto& ar = v.cast<value_t::Array>();
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T tmp;
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try
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{
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toml::resize(tmp, ar.size());
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}
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catch(std::invalid_argument& iv)
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{
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throw toml::type_error("toml::get: static array size is not enough");
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}
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std::transform(ar.cbegin(), ar.cend(), tmp.begin(),
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[](toml::value const& elem){return get<typename T::value_type>(elem);});
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return tmp;
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}
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// table-like case
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template<typename T, toml::value_t vT = toml::detail::check_type<T>(),
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typename std::enable_if<(vT == toml::value_t::Unknown) &&
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toml::detail::is_map<T>::value, std::nullptr_t>::type = nullptr>
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T get(const toml::value& v)
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{
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if(v.type() != value_t::Table)
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throw type_error("get: value type: " + stringize(v.type()) +
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std::string(" is not argument type: Table"));
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T tmp;
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const auto& tb = v.cast<value_t::Table>();
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for(const auto& kv : tb){tmp.insert(kv);}
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return tmp;
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}
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// get_or -----------------------------------------------------------------
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template<typename T>
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inline typename std::remove_cv<typename std::remove_reference<T>::type>::type
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get_or(const toml::Table& tab, const toml::key& ky, T&& opt)
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{
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if(tab.count(ky) == 0) {return std::forward<T>(opt);}
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return get<typename std::remove_cv<
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typename std::remove_reference<T>::type>::type>(tab.find(ky)->second);
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}
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} // toml
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#endif// TOML11_GET
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