mirror of
https://github.com/nlohmann/json.git
synced 2026-10-02 20:50:32 +00:00
Niels Lohmann
4c208728e7
detail::is_sax had no user: the parser and the binary reader only use is_sax_static_asserts, so is_sax was a second, unchecked copy of the SAX event list. is_sax_static_asserts asserted boolean(bool) twice in a row, and detail::is_detected_convertible was never used anywhere. Remove all three and include <cstddef> for size_t instead of <cstdint>. Only names in nlohmann::detail are removed; behavior, public API and ABI are unchanged. The diagnostics for an incomplete SAX handler are the same, apart from the duplicated boolean() message. Part of #5708 Signed-off-by: Niels Lohmann <mail@nlohmann.me>
67 lines
1.9 KiB
C++
67 lines
1.9 KiB
C++
// __ _____ _____ _____
|
|
// __| | __| | | | JSON for Modern C++
|
|
// | | |__ | | | | | | version 3.12.0
|
|
// |_____|_____|_____|_|___| https://github.com/nlohmann/json
|
|
//
|
|
// SPDX-FileCopyrightText: 2013-2026 Niels Lohmann <https://nlohmann.me>
|
|
// SPDX-License-Identifier: MIT
|
|
|
|
#pragma once
|
|
|
|
#include <type_traits>
|
|
|
|
#include <nlohmann/detail/meta/void_t.hpp>
|
|
|
|
NLOHMANN_JSON_NAMESPACE_BEGIN
|
|
namespace detail
|
|
{
|
|
|
|
// https://en.cppreference.com/w/cpp/experimental/is_detected
|
|
struct nonesuch
|
|
{
|
|
nonesuch() = delete;
|
|
~nonesuch() = delete;
|
|
nonesuch(nonesuch const&) = delete;
|
|
nonesuch(nonesuch const&&) = delete;
|
|
void operator=(nonesuch const&) = delete;
|
|
void operator=(nonesuch&&) = delete;
|
|
};
|
|
|
|
template<class Default,
|
|
class AlwaysVoid,
|
|
template<class...> class Op,
|
|
class... Args>
|
|
struct detector
|
|
{
|
|
using value_t = std::false_type;
|
|
using type = Default;
|
|
};
|
|
|
|
template<class Default, template<class...> class Op, class... Args>
|
|
struct detector<Default, void_t<Op<Args...>>, Op, Args...>
|
|
{
|
|
using value_t = std::true_type;
|
|
using type = Op<Args...>;
|
|
};
|
|
|
|
template<template<class...> class Op, class... Args>
|
|
using is_detected = typename detector<nonesuch, void, Op, Args...>::value_t;
|
|
|
|
template<template<class...> class Op, class... Args>
|
|
struct is_detected_lazy : is_detected<Op, Args...> { };
|
|
|
|
template<template<class...> class Op, class... Args>
|
|
using detected_t = typename detector<nonesuch, void, Op, Args...>::type;
|
|
|
|
template<class Default, template<class...> class Op, class... Args>
|
|
using detected_or = detector<Default, void, Op, Args...>;
|
|
|
|
template<class Default, template<class...> class Op, class... Args>
|
|
using detected_or_t = typename detected_or<Default, Op, Args...>::type;
|
|
|
|
template<class Expected, template<class...> class Op, class... Args>
|
|
using is_detected_exact = std::is_same<Expected, detected_t<Op, Args...>>;
|
|
|
|
} // namespace detail
|
|
NLOHMANN_JSON_NAMESPACE_END
|