Files
thirdparty-ArduinoJson/src/ArduinoJson/Variant/VariantAttorney.hpp
2022-11-22 18:56:42 +01:00

49 lines
1.3 KiB
C++

// ArduinoJson - https://arduinojson.org
// Copyright © 2014-2022, Benoit BLANCHON
// MIT License
#pragma once
#include <ArduinoJson/Polyfills/attributes.hpp>
#include <ArduinoJson/Polyfills/type_traits.hpp>
#include <ArduinoJson/Variant/VariantTo.hpp>
#include "VariantConstRef.hpp"
namespace ARDUINOJSON_NAMESPACE {
// Grants access to the internal variant API
class VariantAttorney {
// Tells whether getData() returns a const pointer
template <typename TClient>
struct ResultOfGetData {
protected: // <- to avoid GCC's "all member functions in class are private"
static int probe(const VariantData*);
static char probe(VariantData*);
static TClient& client;
public:
typedef typename conditional<sizeof(probe(client.getData())) == sizeof(int),
const VariantData*, VariantData*>::type type;
};
public:
template <typename TClient>
FORCE_INLINE static MemoryPool* getPool(TClient& client) {
return client.getPool();
}
template <typename TClient>
FORCE_INLINE static typename ResultOfGetData<TClient>::type getData(
TClient& client) {
return client.getData();
}
template <typename TClient>
FORCE_INLINE static VariantData* getOrCreateData(TClient& client) {
return client.getOrCreateData();
}
};
} // namespace ARDUINOJSON_NAMESPACE