vec2 return VEC2;
vec3 return VEC3;
vec4 return VEC4;
-mat2 return MAT2;
-mat3 return MAT3;
-mat4 return MAT4;
+mat2 return MAT2X2;
+mat3 return MAT3X3;
+mat4 return MAT4X4;
mat2x2 TOKEN_OR_IDENTIFIER(120, MAT2X2);
mat2x3 TOKEN_OR_IDENTIFIER(120, MAT2X3);
mat2x4 TOKEN_OR_IDENTIFIER(120, MAT2X4);