deploy: 63c10a51fc

examples/sax_no_exception.cpp

@@ -0,0 +1,40 @@
+#include <iostream>
+#include <nlohmann/json.hpp>
+
+using json = nlohmann::json;
+
+// a DOM parser that reports parse errors instead of throwing
+class sax_no_exception : public nlohmann::detail::json_sax_dom_parser<json, nlohmann::detail::string_input_adapter_type>
+{
+  public:
+    explicit sax_no_exception(json& j)
+        : nlohmann::detail::json_sax_dom_parser<json, nlohmann::detail::string_input_adapter_type>(j, false)
+    {}
+
+    bool parse_error(std::size_t position,
+                     const std::string& last_token,
+                     const json::exception& ex)
+    {
+        std::cout << "parse error at input byte " << position << "\n"
+                  << ex.what() << "\n"
+                  << "last read: \"" << last_token << "\""
+                  << std::endl;
+        return false;
+    }
+};
+
+int main()
+{
+    std::string myinput = "[1,2,3,]";
+
+    json result;
+    sax_no_exception sax(result);
+
+    bool parse_result = json::sax_parse(myinput, &sax);
+    if (!parse_result)
+    {
+        std::cout << "parsing unsuccessful!" << std::endl;
+    }
+
+    std::cout << "parsed value: " << result << std::endl;
+}