22 lines
914 B
C++
22 lines
914 B
C++
#include <iostream>
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#include <nlohmann/json_view.hpp>
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using json_document = nlohmann::json_document;
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using json_view = nlohmann::json_view;
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using json_pointer = nlohmann::json::json_pointer;
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int main()
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{
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json_document doc = json_document::parse(R"({"server": {"host": "localhost", "limits": {"connections": 100}}})");
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const json_view config = doc.root();
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// a nested, optional setting read with a default -- no exception, even
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// though "timeout" is missing several levels down
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std::cout << config.value(json_pointer("/server/limits/connections"), 10) << '\n';
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std::cout << config.value(json_pointer("/server/limits/timeout"), 30) << '\n';
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// an out-of-range array index also falls back to the default
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json_document list_doc = json_document::parse(R"({"servers": ["a", "b"]})");
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std::cout << list_doc.root().value(json_pointer("/servers/5"), std::string("none")) << '\n';
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}
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