[209] | 1 | // Copyright Benoit Blanchon 2014-2016
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| 2 | // MIT License
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| 3 | //
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| 4 | // Arduino JSON library
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| 5 | // https://github.com/bblanchon/ArduinoJson
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| 6 | // If you like this project, please add a star!
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| 7 |
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| 8 | #pragma once
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| 9 |
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| 10 | #include "Internals/ForceInline.hpp"
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| 11 | #include "JsonObjectKey.hpp"
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| 12 |
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| 13 | namespace ArduinoJson {
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| 14 |
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| 15 | // Forward declarations.
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| 16 | class JsonArraySubscript;
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| 17 | template <typename TKey>
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| 18 | class JsonObjectSubscript;
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| 19 |
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| 20 | template <typename TImpl>
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| 21 | class JsonVariantBase : public Internals::JsonPrintable<TImpl> {
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| 22 | public:
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| 23 | FORCE_INLINE const char *asString() const { return as<const char *>(); }
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| 24 |
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| 25 | // Gets the variant as an array.
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| 26 | // Returns a reference to the JsonArray or JsonArray::invalid() if the
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| 27 | // variant
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| 28 | // is not an array.
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| 29 | FORCE_INLINE operator JsonArray &() const { return as<JsonArray &>(); }
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| 30 | FORCE_INLINE JsonArray &asArray() const { return as<JsonArray &>(); }
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| 31 |
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| 32 | // Gets the variant as an object.
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| 33 | // Returns a reference to the JsonObject or JsonObject::invalid() if the
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| 34 | // variant is not an object.
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| 35 | FORCE_INLINE operator JsonObject &() const { return as<JsonObject &>(); }
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| 36 | FORCE_INLINE JsonObject &asObject() const { return as<JsonObject &>(); }
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| 37 |
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| 38 | template <typename T>
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| 39 | FORCE_INLINE operator T() const {
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| 40 | return as<T>();
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| 41 | }
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| 42 |
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| 43 | template <typename T>
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| 44 | FORCE_INLINE const T as() const {
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| 45 | return impl()->template as<T>();
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| 46 | }
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| 47 |
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| 48 | // Mimics an array or an object.
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| 49 | // Returns the size of the array or object if the variant has that type.
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| 50 | // Returns 0 if the variant is neither an array nor an object
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| 51 | size_t size() const { return asArray().size() + asObject().size(); }
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| 52 |
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| 53 | // Mimics an array.
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| 54 | // Returns the element at specified index if the variant is an array.
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| 55 | // Returns JsonVariant::invalid() if the variant is not an array.
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| 56 | FORCE_INLINE const JsonArraySubscript operator[](int index) const;
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| 57 |
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| 58 | // Mimics an object.
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| 59 | // Returns the value associated with the specified key if the variant is
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| 60 | // an object.
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| 61 | // Return JsonVariant::invalid() if the variant is not an object.
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| 62 | FORCE_INLINE const JsonObjectSubscript<const char *> operator[](
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| 63 | const char *key) const;
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| 64 | FORCE_INLINE const JsonObjectSubscript<const String &> operator[](
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| 65 | const String &key) const;
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| 66 |
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| 67 | // Serialize the variant to a JsonWriter
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| 68 | void writeTo(Internals::JsonWriter &writer) const;
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| 69 |
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| 70 | private:
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| 71 | const TImpl *impl() const { return static_cast<const TImpl *>(this); }
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| 72 | };
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| 73 |
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| 74 | template <typename TImpl, typename TComparand>
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| 75 | inline bool operator==(const JsonVariantBase<TImpl> &left, TComparand right) {
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| 76 | return left.template as<TComparand>() == right;
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| 77 | }
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| 78 |
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| 79 | template <typename TImpl, typename TComparand>
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| 80 | inline bool operator==(TComparand left, const JsonVariantBase<TImpl> &right) {
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| 81 | return left == right.template as<TComparand>();
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| 82 | }
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| 83 |
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| 84 | template <typename TImpl, typename TComparand>
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| 85 | inline bool operator!=(const JsonVariantBase<TImpl> &left, TComparand right) {
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| 86 | return left.template as<TComparand>() != right;
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| 87 | }
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| 88 |
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| 89 | template <typename TImpl, typename TComparand>
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| 90 | inline bool operator!=(TComparand left, const JsonVariantBase<TImpl> &right) {
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| 91 | return left != right.template as<TComparand>();
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| 92 | }
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| 93 |
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| 94 | template <typename TImpl, typename TComparand>
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| 95 | inline bool operator<=(const JsonVariantBase<TImpl> &left, TComparand right) {
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| 96 | return left.template as<TComparand>() <= right;
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| 97 | }
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| 98 |
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| 99 | template <typename TImpl, typename TComparand>
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| 100 | inline bool operator<=(TComparand left, const JsonVariantBase<TImpl> &right) {
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| 101 | return left <= right.template as<TComparand>();
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| 102 | }
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| 103 |
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| 104 | template <typename TImpl, typename TComparand>
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| 105 | inline bool operator>=(const JsonVariantBase<TImpl> &left, TComparand right) {
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| 106 | return left.template as<TComparand>() >= right;
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| 107 | }
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| 108 |
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| 109 | template <typename TImpl, typename TComparand>
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| 110 | inline bool operator>=(TComparand left, const JsonVariantBase<TImpl> &right) {
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| 111 | return left >= right.template as<TComparand>();
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| 112 | }
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| 113 |
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| 114 | template <typename TImpl, typename TComparand>
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| 115 | inline bool operator<(const JsonVariantBase<TImpl> &left, TComparand right) {
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| 116 | return left.template as<TComparand>() < right;
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| 117 | }
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| 118 |
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| 119 | template <typename TImpl, typename TComparand>
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| 120 | inline bool operator<(TComparand left, const JsonVariantBase<TImpl> &right) {
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| 121 | return left < right.template as<TComparand>();
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| 122 | }
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| 123 |
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| 124 | template <typename TImpl, typename TComparand>
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| 125 | inline bool operator>(const JsonVariantBase<TImpl> &left, TComparand right) {
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| 126 | return left.template as<TComparand>() > right;
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| 127 | }
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| 128 |
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| 129 | template <typename TImpl, typename TComparand>
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| 130 | inline bool operator>(TComparand left, const JsonVariantBase<TImpl> &right) {
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| 131 | return left > right.template as<TComparand>();
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| 132 | }
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| 133 | }
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