### 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
break;
								case ShaderNode::Varying::STAGE_FRAGMENT:
									if (current_function == varying_function_names.light) {
										var.stage = ShaderNode::Varying::STAGE_FRAGMENT_TO_LIGHT;
									}
									break;
								default:
									break;
							}
						}
						if ((var.stage != ShaderNode::Varying::STAGE_FRAGMENT && var.stage != ShaderNode::Varying::STAGE_FRAGMENT_TO_LIGHT) && var.type < TYPE_FLOAT && var.interpolation != INTERPOLATION_FLAT) {
							_set_tkpos(var.tkpos);
							_set_error(RTR("Varying with integer data type must be declared with `flat` interpolation qualifier."));
							return nullptr;
						}
					}
					if (ident_type == IDENTIFIER_FUNCTION) {
						_set_error(vformat(RTR("Can't use function as identifier: '%s'."), String(identifier)));
						return nullptr;
					}
					if (is_const) {
						last_type = IDENTIFIER_CONSTANT;
					} else {
						last_type = ident_type;
					}
					is_local = ident_type == IDENTIFIER_LOCAL_VAR || ident_type == IDENTIFIER_FUNCTION_ARGUMENT;
				}
				Node *index_expression = nullptr;
				Node *call_expression = nullptr;
				Node *assign_expression = nullptr;