Ajout du validateur json + correctif factory metadata

lib/All/json-schema-validator/test/issue-255-error-message-limit-precision.cpp

@@ -0,0 +1,41 @@
+#include <nlohmann/json-schema.hpp>
+#include <stdexcept>
+
+using nlohmann::json;
+using nlohmann::json_schema::json_validator;
+
+static const json schema = R"(
+{
+  "$schema": "http://json-schema.org/draft-07/schema#",
+  "$id": "arc.schema.json",
+  "properties": {
+    "angle": {
+      "type": "number",
+      "description": "Radians, from -π to π.",
+      "minimum": -3.14159265358979323846,
+      "maximum": 3.14159265358979323846
+    }
+  }
+})"_json;
+
+class custom_error_handler : public nlohmann::json_schema::basic_error_handler
+{
+	void error(const nlohmann::json::json_pointer &ptr, const json &instance, const std::string &message) override
+	{
+		if (message != "instance exceeds maximum of 3.141592653589793")
+			throw std::invalid_argument("Precision print does not work.");
+	}
+};
+
+int main(void)
+{
+	json_validator validator;
+
+	auto instance = R"({ "angle": 3.1415927410125732 })"_json;
+
+	validator.set_root_schema(schema);
+	custom_error_handler err;
+	validator.validate(instance, err);
+
+	return 0;
+}