### 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
}
						mn->index_expression = index_expression;
					} else {
						_set_tkpos(prev_pos);
					}
				}
				expr = mn;
#ifdef DEBUG_ENABLED
				keyword_completion_context = prev_keyword_completion_context;
#endif
				
				
				
				/*} else if (tk.type==TK_BRACKET_OPEN) {
				
				//subindexing has priority over any operator
				
	*/
			} else if (tk.type == TK_BRACKET_OPEN) {
				Node *index = _parse_and_reduce_expression(p_block, p_function_info);
				if (!index) {
					return nullptr;
				}
				if (index->get_array_size() != 0 || (index->get_datatype() != TYPE_INT && index->get_datatype() != TYPE_UINT)) {
					_set_error(RTR("Only integer expressions are allowed for indexing."));
					return nullptr;
				}
				DataType member_type = TYPE_VOID;
				String member_struct_name;
				if (expr->get_array_size() > 0) {