add some constexpr + noexcept
This commit is contained in:
Théo DELRIEU
parent
29f9fe6ae9
commit
1f25ec5d36
2 changed files with 40 additions and 32 deletions
26
src/json.hpp
26
src/json.hpp
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@ -1789,15 +1789,16 @@ class basic_json
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// - JSONSerializer::to_json exists for type T
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// - T is not a istream, nor convertible to basic_json (float, vectors, etc)
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template <typename T, typename U = uncvref_t<T>,
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enable_if_t<
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not std::is_base_of<std::istream, U>::value and
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enable_if_t<not std::is_base_of<std::istream, U>::value and
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not std::is_same<U, basic_json_t>::value and
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not detail::is_basic_json_nested_type<basic_json_t,U>::value and
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not detail::is_basic_json_nested_type<
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basic_json_t, U>::value and
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detail::has_to_json<basic_json, U>::value,
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int> = 0>
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basic_json(T &&val)
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basic_json(T &&val) noexcept(noexcept(JSONSerializer<U>::to_json(
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std::declval<basic_json_t &>(), std::forward<T>(val))))
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{
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JSONSerializer<uncvref_t<T>>::to_json(*this, std::forward<T>(val));
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JSONSerializer<U>::to_json(*this, std::forward<T>(val));
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}
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/*!
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@ -2959,14 +2960,18 @@ class basic_json
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// the latter is preferred if both are present (since it does not require a default construction of T)
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template <
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typename T,
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enable_if_t<not std::is_same<basic_json_t, uncvref_t<T>>::value and
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enable_if_t<
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not std::is_same<basic_json_t, uncvref_t<T>>::value and
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detail::has_from_json<basic_json_t, uncvref_t<T>>::value and
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not detail::has_non_default_from_json<
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basic_json_t, uncvref_t<T>>::value,
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not detail::has_non_default_from_json<basic_json_t,
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uncvref_t<T>>::value,
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int> = 0>
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// do we really want the uncvref ? if a user call get<int &>, shouldn't we
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// i know there is a special behaviour for boolean_t* and such
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// static assert ?
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auto get() const -> uncvref_t<T>
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auto get() const noexcept(noexcept(JSONSerializer<uncvref_t<T>>::from_json(
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std::declval<basic_json_t const &>(), std::declval<uncvref_t<T> &>())))
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-> uncvref_t<T>
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{
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using type = uncvref_t<T>;
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static_assert(std::is_default_constructible<type>::value &&
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@ -2981,14 +2986,13 @@ class basic_json
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// This overload is chosen when:
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// - T is not basic_json_t
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// - and JSONSerializer<T>::from_json(basic_json const&) does not exist
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// TODO add constexpr, noexcept(...)
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template <
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typename T,
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enable_if_t<not std::is_same<basic_json_t, uncvref_t<T>>::value and
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detail::has_non_default_from_json<basic_json_t,
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uncvref_t<T>>::value,
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int> = 0>
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uncvref_t<T> get() const
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constexpr uncvref_t<T> get() const noexcept(noexcept(JSONSerializer<T>::from_json(std::declval<basic_json_t const&>())))
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{
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return JSONSerializer<T>::from_json(*this);
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}
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@ -1789,15 +1789,16 @@ class basic_json
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// - JSONSerializer::to_json exists for type T
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// - T is not a istream, nor convertible to basic_json (float, vectors, etc)
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template <typename T, typename U = uncvref_t<T>,
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enable_if_t<
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not std::is_base_of<std::istream, U>::value and
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enable_if_t<not std::is_base_of<std::istream, U>::value and
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not std::is_same<U, basic_json_t>::value and
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not detail::is_basic_json_nested_type<basic_json_t,U>::value and
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not detail::is_basic_json_nested_type<
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basic_json_t, U>::value and
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detail::has_to_json<basic_json, U>::value,
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int> = 0>
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basic_json(T &&val)
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basic_json(T &&val) noexcept(noexcept(JSONSerializer<U>::to_json(
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std::declval<basic_json_t &>(), std::forward<T>(val))))
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{
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JSONSerializer<uncvref_t<T>>::to_json(*this, std::forward<T>(val));
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JSONSerializer<U>::to_json(*this, std::forward<T>(val));
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}
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/*!
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@ -2959,14 +2960,18 @@ class basic_json
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// the latter is preferred if both are present (since it does not require a default construction of T)
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template <
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typename T,
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enable_if_t<not std::is_same<basic_json_t, uncvref_t<T>>::value and
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enable_if_t<
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not std::is_same<basic_json_t, uncvref_t<T>>::value and
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detail::has_from_json<basic_json_t, uncvref_t<T>>::value and
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not detail::has_non_default_from_json<
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basic_json_t, uncvref_t<T>>::value,
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not detail::has_non_default_from_json<basic_json_t,
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uncvref_t<T>>::value,
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int> = 0>
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// do we really want the uncvref ? if a user call get<int &>, shouldn't we
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// i know there is a special behaviour for boolean_t* and such
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// static assert ?
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auto get() const -> uncvref_t<T>
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auto get() const noexcept(noexcept(JSONSerializer<uncvref_t<T>>::from_json(
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std::declval<basic_json_t const &>(), std::declval<uncvref_t<T> &>())))
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-> uncvref_t<T>
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{
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using type = uncvref_t<T>;
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static_assert(std::is_default_constructible<type>::value &&
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@ -2981,14 +2986,13 @@ class basic_json
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// This overload is chosen when:
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// - T is not basic_json_t
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// - and JSONSerializer<T>::from_json(basic_json const&) does not exist
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// TODO add constexpr, noexcept(...)
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template <
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typename T,
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enable_if_t<not std::is_same<basic_json_t, uncvref_t<T>>::value and
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detail::has_non_default_from_json<basic_json_t,
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uncvref_t<T>>::value,
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int> = 0>
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uncvref_t<T> get() const
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constexpr uncvref_t<T> get() const noexcept(noexcept(JSONSerializer<T>::from_json(std::declval<basic_json_t const&>())))
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{
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return JSONSerializer<T>::from_json(*this);
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}
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