### 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
}
							if (has_builtin(p_functions, name)) {
								_set_redefinition_error(String(name));
								return ERR_PARSE_ERROR;
							}
							tk = _get_token();
							if (!fixed_array_size) {
								array_size = 0;
							}
							unknown_size = false;
						} else if (tk.type == TK_SEMICOLON) {
							is_const_decl = false;
							break;
						} else {
							_set_expected_error(",", ";");
							return ERR_PARSE_ERROR;
						}
					}
					break;
				}
				FunctionInfo builtins;
				if (p_functions.has(name)) {
					builtins = p_functions[name];
				}
				if (p_functions.has("global")) { 
					for (const KeyValue<StringName, BuiltInInfo> &E : p_functions["global"].built_ins) {
						builtins.built_ins.insert(E.key, E.value);
					}
				}
				if (p_functions.has("constants")) {