### Godot version

4.0.2

### System information

Ubuntu 22.04.1 LTS

### Issue description

So far I've found these ones:

![Screenshot from 2023-05-10 17-56-42](https://github.com/godotengine/godot/assets/85438892/b161b14a-cb7d-46fe-8398-816bf354a929)
![Screenshot from 2023-05-10 18-01-02](https://github.com/godotengine/godot/assets/85438892/b0fefcfb-4246-4ebb-ae7b-dd798d7a1d63)

But there are likely more like them. They are invalid, at least in the context I encountered them here (at the beginning of a regular line of script)

### Steps to reproduce

Type `Anchor` in the code editor.

### Minimal reproduction project

N/A
counter(p_counter) {
		(*counter)++;
	}
	~RecursionCheck() {
		(*counter)--;
	}
};
static bool _guess_identifier_type(GDScriptParser::CompletionContext &p_context, const GDScriptParser::IdentifierNode *p_identifier, GDScriptCompletionIdentifier &r_type);
static bool _guess_identifier_type_from_base(GDScriptParser::CompletionContext &p_context, const GDScriptCompletionIdentifier &p_base, const StringName &p_identifier, GDScriptCompletionIdentifier &r_type);
static bool _guess_method_return_type_from_base(GDScriptParser::CompletionContext &p_context, const GDScriptCompletionIdentifier &p_base, const StringName &p_method, GDScriptCompletionIdentifier &r_type);
static bool _is_expression_named_identifier(const GDScriptParser::ExpressionNode *p_expression, const StringName &p_name) {
	if (p_expression) {
		switch (p_expression->type) {
			case GDScriptParser::Node::IDENTIFIER: {
				const GDScriptParser::IdentifierNode *id = static_cast<const GDScriptParser::IdentifierNode *>(p_expression);
				if (id->name == p_name) {
					return true;
				}
			} break;
			case GDScriptParser::Node::CAST: {
				const GDScriptParser::CastNode *cn = static_cast<const GDScriptParser::CastNode *>(p_expression);
				return _is_expression_named_identifier(cn->operand, p_name);
			} break;
			default:
				break;
		}
	}
	return false;
}
static bool _guess_expression_type(GDScriptParser::CompletionContext &p_context, const GDScriptParser::ExpressionNode *p_expression, GDScriptCompletionIdentifier &r_type) {