### Godot version

4.0.3

### System information

Win7

### Issue description

![image](https://github.com/godotengine/godot/assets/28286958/abec9d3c-e078-424c-9430-d9fe8897aad6)


### Steps to reproduce

1. Create shader
2. Add uint with hex, e.g. 0xffffu

### Minimal reproduction project

N/A
#endif 
				tk = _get_token();
				if (tk.type == TK_IDENTIFIER) {
					st.name = tk.text;
					if (shader->constants.has(st.name) || shader->structs.has(st.name)) {
						_set_redefinition_error(String(st.name));
						return ERR_PARSE_ERROR;
					}
					tk = _get_token();
					if (tk.type != TK_CURLY_BRACKET_OPEN) {
						_set_expected_error("{");
						return ERR_PARSE_ERROR;
					}
				} else {
					_set_error(RTR("Expected a struct identifier."));
					return ERR_PARSE_ERROR;
				}
				StructNode *st_node = alloc_node<StructNode>();
				st.shader_struct = st_node;
				int member_count = 0;
				HashSet<String> member_names;
				while (true) { 
#ifdef DEBUG_ENABLED
					keyword_completion_context = CF_DATATYPE | CF_PRECISION_MODIFIER;
#endif 
					tk = _get_token();
					if (tk.type == TK_CURLY_BRACKET_CLOSE) {
						break;
					}
					StringName struct_name = "";