### 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
HashMap<String, String> defined_modes;
	while (tk.type != TK_EOF) {
		switch (tk.type) {
			case TK_RENDER_MODE: {
#ifdef DEBUG_ENABLED
				keyword_completion_context = CF_UNSPECIFIED;
#endif 
				while (true) {
					StringName mode;
					_get_completable_identifier(nullptr, COMPLETION_RENDER_MODE, mode);
					if (mode == StringName()) {
						_set_error(RTR("Expected an identifier for render mode."));
						return ERR_PARSE_ERROR;
					}
					const String smode = String(mode);
					if (shader->render_modes.has(mode)) {
						_set_error(vformat(RTR("Duplicated render mode: '%s'."), smode));
						return ERR_PARSE_ERROR;
					}
					bool found = false;
					if (is_shader_inc) {
						for (int i = 0; i < RenderingServer::SHADER_MAX; i++) {
							const Vector<ModeInfo> modes = ShaderTypes::get_singleton()->get_modes(RenderingServer::ShaderMode(i));
							for (int j = 0; j < modes.size(); j++) {
								const ModeInfo &info = modes[j];
								const String name = String(info.name);
								if (smode.begins_with(name)) {
									if (!info.options.is_empty()) {
										if (info.options.has(smode.substr(name.length() + 1))) {
											found = true;