mistakes were made. I undid them.

include/godot_cpp/core/Basis.cpp

@@ -63,13 +63,9 @@ void Basis::invert()
 			elements[0][1] * co[1]+
 			elements[0][2] * co[2];
 
-	if ( det != 0 ) {
-		// WTF
-		__builtin_trap(); // WTF WTF WTF
 	
-		// I shouldn't do this
-		// @Todo @Fixme @Todo @Todo
-	}
+	ERR_FAIL_COND(det != 0);
+	
 	real_t s = 1.0/det;
 
 	set(  co[0]*s, cofac(0, 2, 2, 1) * s, cofac(0, 1, 1, 2) * s,
@@ -407,14 +403,7 @@ Basis Basis::transpose_xform(const Basis& m) const
 
 void Basis::orthonormalize()
 {
-	if (determinant() != 0) {
-		// not this crap again
-		__builtin_trap(); // WTF WTF WTF
-		// somebody please complain some day
-		// so I can fix this
-
-		// need propert error reporting here.
-	}
+	ERR_FAIL_COND(determinant() != 0);
 
 	// Gram-Schmidt Process
 
@@ -576,12 +565,7 @@ int Basis::get_orthogonal_index() const
 void Basis::set_orthogonal_index(int p_index){
 
 	//there only exist 24 orthogonal bases in r3
-	if (p_index >= 24) {
-		__builtin_trap(); // kiiiiill me
-		// I don't want to do shady stuff like that
-		// @Todo WTF WTF
-	}
-
+	ERR_FAIL_COND(p_index >= 24);
 
 	*this=_ortho_bases[p_index];
 

include/godot_cpp/core/Color.cpp

@@ -4,6 +4,8 @@
 
 #include <cmath>
 
+#include "Defs.hpp"
+
 #include "String.hpp"
 
 namespace godot {
@@ -270,20 +272,16 @@ Color Color::html(const String& p_color)
 	} else if (color.length()==6) {
 		alpha=false;
 	} else {
-		// @Todo error reporting
-		// ERR_EXPLAIN("Invalid Color Code: "+p_color);
-		// ERR_FAIL_V(Color());
-		return Color();
+		ERR_PRINT(String("Invalid Color Code: ") + p_color);
+		ERR_FAIL_V(Color());
 	}
 
 	int a=255;
 	if (alpha) {
 		a=_parse_col(color,0);
 		if (a<0) {
-			// @Todo error reporting
-			// ERR_EXPLAIN("Invalid Color Code: "+p_color);
-			// ERR_FAIL_V(Color());
-			return Color();
+			ERR_PRINT("Invalid Color Code: "+p_color);
+			ERR_FAIL_V(Color());
 		}
 	}
 
@@ -291,24 +289,18 @@ Color Color::html(const String& p_color)
 
 	int r=_parse_col(color,from+0);
 	if (r<0) {
-		// @Todo error reporting
-		// ERR_EXPLAIN("Invalid Color Code: "+p_color);
-		// ERR_FAIL_V(Color());
-		return Color();
+		ERR_PRINT("Invalid Color Code: "+p_color);
+		ERR_FAIL_V(Color());
 	}
 	int g=_parse_col(color,from+2);
 	if (g<0) {
-		// @Todo error reporting
-		// ERR_EXPLAIN("Invalid Color Code: "+p_color);
-		// ERR_FAIL_V(Color());
-		return Color();
+		ERR_PRINT("Invalid Color Code: "+p_color);
+		ERR_FAIL_V(Color());
 	}
 	int b=_parse_col(color,from+4);
 	if (b<0) {
-		// @Todo error reporting
-		// ERR_EXPLAIN("Invalid Color Code: "+p_color);
-		// ERR_FAIL_V(Color());
-		return Color();
+		ERR_PRINT("Invalid Color Code: "+p_color);
+		ERR_FAIL_V(Color());
 	}
 
 	return Color(r/255.0,g/255.0,b/255.0,a/255.0);

include/godot_cpp/core/Defs.hpp

@@ -60,7 +60,7 @@ enum Error {
 
 }
 
-// @Todo error handling stuff here plz
+#include <stdio.h>
 
 typedef float real_t;
 
@@ -87,19 +87,16 @@ typedef float real_t;
 
 
 #ifndef ERR_PRINT
-#define ERR_PRINT(msg)
+#define ERR_PRINT(msg) fprintf(stderr, "ERROR: %ls\n", (msg).c_string())
 #endif
 
 #ifndef ERR_FAIL_INDEX_V
 #define ERR_FAIL_INDEX_V(a, b, c)
 #endif
 
-#ifndef ERR_FAIL_INDEX
-#define ERR_FAIL_INDEX(a, b)
-#endif
 
 #ifndef ERR_FAIL_COND
-#define ERR_FAIL_COND(a)
+#define ERR_FAIL_COND(a) do { if (a) { fprintf(stderr, #a); return; } } while(0)
 #endif
 
 

include/godot_cpp/core/InputEvent.cpp

@@ -64,7 +64,7 @@ bool InputEvent::operator==(const InputEvent &p_event) const {
 				&& action.pressed == p_event.action.pressed;
 		/* clang-format on */
 		default:
-			ERR_PRINT("No logic to compare InputEvents of this type, this shouldn't happen.");
+			ERR_PRINT(String("No logic to compare InputEvents of this type, this shouldn't happen."));
 	}
 
 	return false;

include/godot_cpp/core/String.cpp

@@ -114,7 +114,7 @@ bool String::operator >=(const String &s)
 	return !(*this < s);
 }
 
-const wchar_t *String::c_string()
+const wchar_t *String::c_string() const
 {
 	return godot_string_c_str(&_godot_string);
 }

include/godot_cpp/core/String.hpp

@@ -49,10 +49,11 @@ public:
 
 	bool operator >=(const String &s);
 
-	const wchar_t *c_string();
+	const wchar_t *c_string() const;
 
 };
 
+String operator +(const char *a, const String& b);
 
 
 }