Define custom throw for nlohman::json when LDTK_NO_THROW is defined

Nlohmann json library allows defining JSON_THROW_USER macro to override the default throw macro when JSON_NOEXCEPTION is defined.

include/LDtkLoader/Utils.hpp

@@ -8,15 +8,17 @@
 #include "LDtkLoader/DataTypes.hpp"
 
 #ifdef LDTK_NO_THROW
+    #include <exception>
     #define ldtk_error(msg) do{ldtk::print_error(__FUNCTION__, msg);exit(EXIT_FAILURE);}while(0)
+    #define ldtk_json_error(ex) do{ldtk::print_json_error(ex.what());exit(EXIT_FAILURE);}while(0)
+    #define JSON_THROW_USER ldtk_json_error // override nlohmann::json throw macro
 #else
     #define ldtk_error(msg) throw std::invalid_argument("LDtkLoader exception (in "+std::string(__FUNCTION__)+") : "+std::string(msg))
 #endif
 
 namespace ldtk {
     auto getLayerTypeFromString(const std::string& type_name) -> LayerType;
 
-    inline void print_error(const std::string& fn, const std::string& msg) {
-        std::cerr << "LDtkLoader Error (in " << fn << ") : " << msg << std::endl;
-    }
+    void print_error(const std::string& fn, const std::string& msg);
+    void print_json_error(const std::string& msg);
 }

src/Project.cpp

@@ -5,6 +5,7 @@
 #include <fstream>
 #include <istream>
 
+#include "LDtkLoader/Utils.hpp"
 #include "LDtkLoader/World.hpp"
 #include "LDtkLoader/generated/Version.hpp"
 #include "json.hpp"

src/Utils.cpp

@@ -14,3 +14,11 @@ auto ldtk::getLayerTypeFromString(const std::string& type_name) -> ldtk::LayerTy
         return LayerType::AutoLayer;
     return LayerType::Tiles;
 }
+
+void ldtk::print_error(const std::string& fn, const std::string& msg) {
+    std::cerr << "LDtkLoader Error (in " << fn << ") : " << msg << std::endl;
+}
+
+void ldtk::print_json_error(const std::string& msg) {
+    std::cerr << "LDtkLoader Json Error : " << msg << std::endl;
+}