60 lines
1.3 KiB
C++
60 lines
1.3 KiB
C++
#include <iostream>
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#include <unordered_map>
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#include <nlohmann/json.hpp>
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using json = nlohmann::json;
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int main()
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{
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// create a JSON value with different types
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json json_types =
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{
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{"boolean", true},
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{
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"number", {
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{"integer", 42},
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{"floating-point", 17.23}
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}
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},
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{"string", "Hello, world!"},
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{"array", {1, 2, 3, 4, 5}},
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{"null", nullptr}
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};
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bool v1;
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int v2;
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short v3;
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float v4;
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int v5;
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std::string v6;
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std::vector<short> v7;
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std::unordered_map<std::string, json> v8;
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// use explicit conversions
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json_types["boolean"].get_to(v1);
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json_types["number"]["integer"].get_to(v2);
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json_types["number"]["integer"].get_to(v3);
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json_types["number"]["floating-point"].get_to(v4);
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json_types["number"]["floating-point"].get_to(v5);
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json_types["string"].get_to(v6);
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json_types["array"].get_to(v7);
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json_types.get_to(v8);
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// print the conversion results
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std::cout << v1 << '\n';
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std::cout << v2 << ' ' << v3 << '\n';
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std::cout << v4 << ' ' << v5 << '\n';
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std::cout << v6 << '\n';
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for (auto i : v7)
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{
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std::cout << i << ' ';
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}
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std::cout << "\n\n";
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for (auto i : v8)
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{
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std::cout << i.first << ": " << i.second << '\n';
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}
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}
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