### 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
}
				tk = _get_token();
				if (tk.type != TK_SEMICOLON) {
					_set_expected_after_error(";", "return");
					return ERR_PARSE_ERROR;
				}
#ifdef DEBUG_ENABLED
				if (b->parent_function->return_type == DataType::TYPE_BOOL) {
					keyword_completion_context = CF_BLOCK;
				}
#endif 
				flow->expressions.push_back(expr);
			}
			p_block->statements.push_back(flow);
			BlockNode *block = p_block;
			while (block) {
				if (block->block_type == BlockNode::BLOCK_TYPE_CASE || block->block_type == BlockNode::BLOCK_TYPE_DEFAULT) {
					return OK;
				}
				block = block->parent_block;
			}
		} else if (tk.type == TK_CF_DISCARD) {
			
			BlockNode *b = p_block;
			while (b && !b->parent_function) {
				b = b->parent_block;
			}
			if (!b) {
				_set_parsing_error();
				return ERR_BUG;