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reusing existing conversion components

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Dmitry Arkhipov
2022-10-21 16:05:47 +03:00
committed by Dmitry Arkhipov
parent 62af0a0c16
commit 56fcb09f2d
4 changed files with 386 additions and 515 deletions
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857
include/boost/json/detail/parse_into.hpp
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6
include/boost/json/detail/value_to.hpp
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@@ -382,10 +382,6 @@ struct to_described_member
using Ds = describe::describe_members<
T, describe::mod_public | describe::mod_inherited>;
template< class D >
using described_member_t = remove_cvref<decltype(
std::declval<T&>().* D::pointer )>;
using result_type = mp11::mp_eval_if_c< !non_throwing, T, result, T >;
result_type& res;
@@ -401,7 +397,7 @@ struct to_described_member
return;
using D = mp11::mp_at<Ds, I>;
using M = described_member_t<D>;
using M = described_member_t<T, D>;
auto const found = obj.find(D::name);
if( found == obj.end() )

30
include/boost/json/impl/conversion.hpp
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@@ -145,6 +145,8 @@ struct array_conversion_tag : native_conversion_tag { };
struct string_conversion_tag : native_conversion_tag { };
struct bool_conversion_tag : native_conversion_tag { };
struct number_conversion_tag : native_conversion_tag { };
struct integral_conversion_tag : number_conversion_tag { };
struct floating_point_conversion_tag : number_conversion_tag { };
struct null_like_conversion_tag { };
struct string_like_conversion_tag { };
struct map_like_conversion_tag { };
@@ -217,6 +219,9 @@ using described_non_public_members = describe::describe_members<
template< class T >
using described_bases = describe::describe_bases<
T, describe::mod_any_access>;
template< class T, class D >
using described_member_t = remove_cvref<decltype(
std::declval<T&>().* D::pointer )>;
// user conversion (via tag_invoke)
template< class Ctx, class T, class Dir >
@@ -236,19 +241,20 @@ using native_conversion_category = mp11::mp_cond<
// generic conversions
template< class T >
using generic_conversion_category = mp11::mp_cond<
std::is_same<T, bool>, bool_conversion_tag,
std::is_arithmetic<T>, number_conversion_tag,
is_null_like<T>, null_like_conversion_tag,
is_string_like<T>, string_like_conversion_tag,
is_map_like<T>, map_like_conversion_tag,
is_sequence_like<T>, sequence_conversion_tag,
is_tuple_like<T>, tuple_conversion_tag,
is_described_class<T>, described_class_conversion_tag,
is_described_enum<T>, described_enum_conversion_tag,
is_variant_like<T>, variant_conversion_tag,
is_optional_like<T>, optional_conversion_tag,
std::is_same<T, bool>, bool_conversion_tag,
std::is_integral<T>, integral_conversion_tag,
std::is_floating_point<T>, floating_point_conversion_tag,
is_null_like<T>, null_like_conversion_tag,
is_string_like<T>, string_like_conversion_tag,
is_map_like<T>, map_like_conversion_tag,
is_sequence_like<T>, sequence_conversion_tag,
is_tuple_like<T>, tuple_conversion_tag,
is_described_class<T>, described_class_conversion_tag,
is_described_enum<T>, described_enum_conversion_tag,
is_variant_like<T>, variant_conversion_tag,
is_optional_like<T>, optional_conversion_tag,
// failed to find a suitable implementation
mp11::mp_true, no_conversion_tag>;
mp11::mp_true, no_conversion_tag>;
template< class T >
using nested_type = typename T::type;