mirror of
https://github.com/eledio-devices/thirdparty-ArduinoJson.git
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139 lines
3.8 KiB
C++
139 lines
3.8 KiB
C++
// ArduinoJson - https://arduinojson.org
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// Copyright © 2014-2022, Benoit BLANCHON
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// MIT License
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#pragma once
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#include <stddef.h>
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#include <stdint.h> // for uint8_t
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#include <ArduinoJson/Memory/MemoryPool.hpp>
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#include <ArduinoJson/Polyfills/type_traits.hpp>
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#include <ArduinoJson/Strings/StringAdapters.hpp>
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#include <ArduinoJson/Variant/VariantAttorney.hpp>
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#include <ArduinoJson/Variant/VariantConstRef.hpp>
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#include <ArduinoJson/Variant/VariantFunctions.hpp>
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#include <ArduinoJson/Variant/VariantOperators.hpp>
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#include <ArduinoJson/Variant/VariantShortcuts.hpp>
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#include <ArduinoJson/Variant/VariantTag.hpp>
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namespace ARDUINOJSON_NAMESPACE {
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// Forward declarations.
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class ArrayRef;
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class ObjectRef;
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class VariantConstRef : public VariantTag,
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public VariantOperators<VariantConstRef>,
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public VariantShortcuts<VariantConstRef> {
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friend class VariantAttorney;
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public:
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VariantConstRef() : _data(0) {}
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explicit VariantConstRef(const VariantData* data) : _data(data) {}
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FORCE_INLINE bool isNull() const {
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return variantIsNull(_data);
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}
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FORCE_INLINE bool isUnbound() const {
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return !_data;
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}
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FORCE_INLINE size_t memoryUsage() const {
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return _data ? _data->memoryUsage() : 0;
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}
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FORCE_INLINE size_t nesting() const {
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return variantNesting(_data);
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}
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size_t size() const {
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return variantSize(_data);
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}
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template <typename T>
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FORCE_INLINE
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typename enable_if<!is_same<T, char*>::value && !is_same<T, char>::value,
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T>::type
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as() const {
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return Converter<T>::fromJson(*this);
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}
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template <typename T>
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FORCE_INLINE typename enable_if<is_same<T, char*>::value, const char*>::type
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ARDUINOJSON_DEPRECATED("Replace as<char*>() with as<const char*>()")
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as() const {
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return as<const char*>();
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}
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template <typename T>
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FORCE_INLINE typename enable_if<is_same<T, char>::value, char>::type
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ARDUINOJSON_DEPRECATED(
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"Support for char is deprecated, use int8_t or uint8_t instead")
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as() const {
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return static_cast<char>(as<signed char>());
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}
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template <typename T>
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FORCE_INLINE
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typename enable_if<!is_same<T, char*>::value && !is_same<T, char>::value,
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bool>::type
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is() const {
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return Converter<T>::checkJson(*this);
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}
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template <typename T>
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FORCE_INLINE typename enable_if<is_same<T, char*>::value, bool>::type
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ARDUINOJSON_DEPRECATED("Replace is<char*>() with is<const char*>()")
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is() const {
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return is<const char*>();
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}
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template <typename T>
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FORCE_INLINE typename enable_if<is_same<T, char>::value, bool>::type
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ARDUINOJSON_DEPRECATED(
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"Support for char is deprecated, use int8_t or uint8_t instead")
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is() const {
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return is<signed char>();
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}
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template <typename T>
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FORCE_INLINE operator T() const {
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return as<T>();
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}
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FORCE_INLINE VariantConstRef operator[](size_t index) const {
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return VariantConstRef(variantGetElement(_data, index));
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}
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// operator[](const std::string&) const
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// operator[](const String&) const
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template <typename TString>
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FORCE_INLINE
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typename enable_if<IsString<TString>::value, VariantConstRef>::type
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operator[](const TString& key) const {
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return VariantConstRef(variantGetMember(_data, adaptString(key)));
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}
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// operator[](char*) const
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// operator[](const char*) const
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// operator[](const __FlashStringHelper*) const
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template <typename TChar>
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FORCE_INLINE
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typename enable_if<IsString<TChar*>::value, VariantConstRef>::type
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operator[](TChar* key) const {
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return VariantConstRef(variantGetMember(_data, adaptString(key)));
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}
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protected:
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const VariantData* getData() const {
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return _data;
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}
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private:
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const VariantData* _data;
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};
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} // namespace ARDUINOJSON_NAMESPACE
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