json_value.h

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// Copyright (c) Microsoft Corporation.
// Licensed under the MIT License.
 
#ifndef _SCENEPIC_JSON_VALUE_H_
#define _SCENEPIC_JSON_VALUE_H_
 
#include <cstdint>
#include <iostream>
#include <map>
#include <string>
#include <vector>
 
namespace scenepic
{
  enum class JsonType
  {
    Object,
    Array,
    String,
    Integer,
    Double,
    Boolean,
    Null
  };
 
  class JsonValue
  {
  public:
    JsonValue();
 
    JsonValue(JsonType type);
 
    JsonValue(const std::string& value);
 
    JsonValue(std::string&& value);
 
    JsonValue(const char* value);
 
    JsonValue(double value);
 
    JsonValue(std::int64_t value);
 
    JsonValue(bool value);
 
    void resize(std::size_t size);
 
    void append(JsonValue&& object);
 
    void append(const JsonValue& object);
 
    JsonValue& operator[](const std::string& key);
 
    const JsonValue& operator[](const std::string& key) const;
 
    JsonValue& operator=(const std::string& value);
 
    JsonValue& operator=(std::string&& value);
 
    JsonValue& operator=(const char* value);
 
    JsonValue& operator=(double value);
 
    JsonValue& operator=(std::int64_t value);
 
    JsonValue& operator=(bool value);
 
    JsonType type() const;
 
    std::string to_string() const;
 
    const std::string& as_string() const;
 
    double as_double() const;
 
    float as_float() const;
 
    std::int64_t as_int() const;
 
    bool as_boolean() const;
 
    const std::vector<JsonValue>& values() const;
 
    const std::map<std::string, JsonValue>& lookup() const;
 
    static JsonValue parse(std::istream& stream);
 
    static JsonValue nullSingleton();
 
  private:
    std::string m_string;
    double m_double;
    std::int64_t m_int;
    bool m_bool;
    JsonType m_type;
    std::map<std::string, JsonValue> m_lookup;
    std::vector<JsonValue> m_values;
  };
} // namespace scenepic
 
#endif