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examples/parse__allow_exceptions.cpp

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+#include <iostream>
+#include <nlohmann/json.hpp>
+
+using json = nlohmann::json;
+
+int main()
+{
+    // an invalid JSON text
+    std::string text = R"(
+    {
+        "key": "value without closing quotes
+    }
+    )";
+
+    // parse with exceptions
+    try
+    {
+        json j = json::parse(text);
+    }
+    catch (json::parse_error& e)
+    {
+        std::cout << e.what() << std::endl;
+    }
+
+    // parse without exceptions
+    json j = json::parse(text, nullptr, false);
+
+    if (j.is_discarded())
+    {
+        std::cout << "the input is invalid JSON" << std::endl;
+    }
+    else
+    {
+        std::cout << "the input is valid JSON: " << j << std::endl;
+    }
+}