feat: highlight unsafe operations

[gohome001]

close #19467

[Veykril]

Suggested change

	T![unsafe] if token.parent_ancestors().find_map(ast::BlockExpr::cast).is_some() => {
	T![unsafe] if token.parent().and_then(ast::BlockExpr::cast).is_some() => {

[Veykril]

Suggested change

	unsafe_token: Option<SyntaxToken>,
	unsafe_token: SyntaxToken,

we already have the token here

[Veykril]

Suggested change

	let Some(block_expr) = token.parent().and_then(ast::BlockExpr::cast) else {
	return FxHashMap::default();
	};
	hl(sema, Some(token), Some(block_expr)).unwrap_or_default()
	hl(sema, token, token.parent().and_then(ast::BlockExpr::cast)).unwrap_or_default()

[Veykril]

Suggested change

	if let Some(node) = block.syntax().ancestors().find(|n| ast::Fn::can_cast(n.kind())) {
	if let Some(function) = ast::Fn::cast(node) {
	// highlight unsafe keyword of the function
	if let Some(unsafe_token) = function.unsafe_token() {
	push_to_highlights(unsafe_token_file_id, Some(unsafe_token.text_range()));
	}
	// highlight unsafe operations
	if let Some(f) = sema.to_def(&function) {
	let unsafe_ops = sema.get_unsafe_ops(f.into());
	for unsafe_op in unsafe_ops {
	push_to_highlights(
	unsafe_op.file_id,
	Some(unsafe_op.value.text_range()),
	);
	}
	}
	}
	}
	if let Some(body) = sema.body_for(InFile::new(unsafe_token_file_id, block_expr.syntax())) {
	let unsafe_ops = sema.get_unsafe_ops(f.into());
	for unsafe_op in unsafe_ops {
	push_to_highlights(unsafe_op.file_id, Some(unsafe_op.value.text_range()));
	}
	}