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remove some boilerplate

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Théo DELRIEU 2017-01-15 22:08:33 +01:00
parent e60e458a7e
commit 1d87097741
2 changed files with 22 additions and 22 deletions
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22
src/json.hpp
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@ -3019,26 +3019,26 @@ class basic_json
// the latter is preferred if both are present (since it does not require a default construction of T) // the latter is preferred if both are present (since it does not require a default construction of T)
template < template <
typename T, typename T,
typename U = uncvref_t<T>,
enable_if_t< enable_if_t<
not std::is_same<basic_json_t, uncvref_t<T>>::value and not std::is_same<basic_json_t, U>::value and
detail::has_from_json<basic_json_t, uncvref_t<T>>::value and detail::has_from_json<basic_json_t, U>::value and
not detail::has_non_default_from_json<basic_json_t, not detail::has_non_default_from_json<basic_json_t,
uncvref_t<T>>::value, U>::value,
int> = 0> int> = 0>
// do we really want the uncvref ? if a user call get<int &>, shouldn't we // do we really want the uncvref ? if a user call get<int &>, shouldn't we
// static assert ? // static assert ?
// i know there is a special behaviour for boolean_t* and such // i know there is a special behaviour for boolean_t* and such
auto get() const noexcept(noexcept(JSONSerializer<uncvref_t<T>>::from_json( auto get() const noexcept(noexcept(JSONSerializer<U>::from_json(
std::declval<const basic_json_t &>(), std::declval<uncvref_t<T> &>()))) std::declval<const basic_json_t &>(), std::declval<U &>())))
-> uncvref_t<T> -> U
{ {
using type = uncvref_t<T>; static_assert(std::is_default_constructible<U>::value and
static_assert(std::is_default_constructible<type>::value and std::is_copy_constructible<U>::value,
std::is_copy_constructible<type>::value,
"Types must be DefaultConstructible and " "Types must be DefaultConstructible and "
"CopyConstructible when used with get"); "CopyConstructible when used with get");
type ret; U ret;
JSONSerializer<type>::from_json(*this, ret); JSONSerializer<U>::from_json(*this, ret);
return ret; return ret;
} }

22
src/json.hpp.re2c
View file

@ -3019,26 +3019,26 @@ class basic_json
// the latter is preferred if both are present (since it does not require a default construction of T) // the latter is preferred if both are present (since it does not require a default construction of T)
template < template <
typename T, typename T,
typename U = uncvref_t<T>,
enable_if_t< enable_if_t<
not std::is_same<basic_json_t, uncvref_t<T>>::value and not std::is_same<basic_json_t, U>::value and
detail::has_from_json<basic_json_t, uncvref_t<T>>::value and detail::has_from_json<basic_json_t, U>::value and
not detail::has_non_default_from_json<basic_json_t, not detail::has_non_default_from_json<basic_json_t,
uncvref_t<T>>::value, U>::value,
int> = 0> int> = 0>
// do we really want the uncvref ? if a user call get<int &>, shouldn't we // do we really want the uncvref ? if a user call get<int &>, shouldn't we
// static assert ? // static assert ?
// i know there is a special behaviour for boolean_t* and such // i know there is a special behaviour for boolean_t* and such
auto get() const noexcept(noexcept(JSONSerializer<uncvref_t<T>>::from_json( auto get() const noexcept(noexcept(JSONSerializer<U>::from_json(
std::declval<const basic_json_t &>(), std::declval<uncvref_t<T> &>()))) std::declval<const basic_json_t &>(), std::declval<U &>())))
-> uncvref_t<T> -> U
{ {
using type = uncvref_t<T>; static_assert(std::is_default_constructible<U>::value and
static_assert(std::is_default_constructible<type>::value and std::is_copy_constructible<U>::value,
std::is_copy_constructible<type>::value,
"Types must be DefaultConstructible and " "Types must be DefaultConstructible and "
"CopyConstructible when used with get"); "CopyConstructible when used with get");
type ret; U ret;
JSONSerializer<type>::from_json(*this, ret); JSONSerializer<U>::from_json(*this, ret);
return ret; return ret;
} }