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guard instantiation of detail::detector in conversion operator of basic_json

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to workaround strange Clang behavior:
https://bugs.llvm.org/show_bug.cgi?id=48507
This commit is contained in:
Alexey Ochapov 2021-02-06 12:54:20 +03:00
parent d2852ea0c1
commit 4611528bb8
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GPG Key ID: 9DC52E8F031B8DA8
3 changed files with 22 additions and 16 deletions
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2
include/nlohmann/detail/meta/detected.hpp
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@ -37,7 +37,7 @@ struct detector<Default, void_t<Op<Args...>>, Op, Args...>
};
template<template<class...> class Op, class... Args>
using is_detected = typename detector<nonesuch, void, Op, Args...>::value_t;
struct is_detected : detector<nonesuch, void, Op, Args...>::value_t {};
template<template<class...> class Op, class... Args>
using detected_t = typename detector<nonesuch, void, Op, Args...>::type;

17
include/nlohmann/json.hpp
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@ -3342,15 +3342,18 @@ class basic_json // NOLINT(cppcoreguidelines-special-member-functions,hicpp-spec
@since version 1.0.0
*/
template < typename ValueType, typename std::enable_if <
!std::is_pointer<ValueType>::value&&
!std::is_same<ValueType, detail::json_ref<basic_json>>::value&&
!std::is_same<ValueType, typename string_t::value_type>::value&&
!detail::is_basic_json<ValueType>::value
&& !std::is_same<ValueType, std::initializer_list<typename string_t::value_type>>::value
detail::conjunction <
std::integral_constant < bool,
!std::is_pointer<ValueType>::value&&
!std::is_same<ValueType, detail::json_ref<basic_json>>::value&&
!std::is_same<ValueType, typename string_t::value_type>::value&&
!detail::is_basic_json<ValueType>::value
&& !std::is_same<ValueType, std::initializer_list<typename string_t::value_type>>::value
#if defined(JSON_HAS_CPP_17) && (defined(__GNUC__) || (defined(_MSC_VER) && _MSC_VER >= 1910 && _MSC_VER <= 1914))
&& !std::is_same<ValueType, typename std::string_view>::value
&& !std::is_same<ValueType, typename std::string_view>::value
#endif
&& detail::is_detected<detail::get_template_function, const basic_json_t&, ValueType>::value
>,
detail::is_detected<detail::get_template_function, const basic_json_t&, ValueType >>::value
, int >::type = 0 >
JSON_EXPLICIT operator ValueType() const
{

19
single_include/nlohmann/json.hpp
View File

@ -3305,7 +3305,7 @@ struct detector<Default, void_t<Op<Args...>>, Op, Args...>
};
template<template<class...> class Op, class... Args>
using is_detected = typename detector<nonesuch, void, Op, Args...>::value_t;
struct is_detected : detector<nonesuch, void, Op, Args...>::value_t {};
template<template<class...> class Op, class... Args>
using detected_t = typename detector<nonesuch, void, Op, Args...>::type;
@ -20362,15 +20362,18 @@ class basic_json // NOLINT(cppcoreguidelines-special-member-functions,hicpp-spec
@since version 1.0.0
*/
template < typename ValueType, typename std::enable_if <
!std::is_pointer<ValueType>::value&&
!std::is_same<ValueType, detail::json_ref<basic_json>>::value&&
!std::is_same<ValueType, typename string_t::value_type>::value&&
!detail::is_basic_json<ValueType>::value
&& !std::is_same<ValueType, std::initializer_list<typename string_t::value_type>>::value
detail::conjunction <
std::integral_constant < bool,
!std::is_pointer<ValueType>::value&&
!std::is_same<ValueType, detail::json_ref<basic_json>>::value&&
!std::is_same<ValueType, typename string_t::value_type>::value&&
!detail::is_basic_json<ValueType>::value
&& !std::is_same<ValueType, std::initializer_list<typename string_t::value_type>>::value
#if defined(JSON_HAS_CPP_17) && (defined(__GNUC__) || (defined(_MSC_VER) && _MSC_VER >= 1910 && _MSC_VER <= 1914))
&& !std::is_same<ValueType, typename std::string_view>::value
&& !std::is_same<ValueType, typename std::string_view>::value
#endif
&& detail::is_detected<detail::get_template_function, const basic_json_t&, ValueType>::value
>,
detail::is_detected<detail::get_template_function, const basic_json_t&, ValueType >>::value
, int >::type = 0 >
JSON_EXPLICIT operator ValueType() const
{