Function checkLoadedASTDepth

cel/io.go:106–111

checkLoadedASTDepth guards ASTs that enter through the proto conversion helpers (ParsedExprToAst / CheckedExprToAst) against nesting deeper than the parser's recursion limit. Those entry points bypass the parser, so without this check a deeply nested loaded AST could exhaust the Go stack during late

(a *ast.AST)

// Embedders that fully control their AST inputs can skip this by building the AST through the
// common/ast package directly instead of these conversion helpers.
func checkLoadedASTDepth(a *ast.AST) error {
	if ast.ExceedsDepth(a, defaultMaxASTDepth) {
		return fmt.Errorf("input exceeds maximum expression nesting depth: %d", defaultMaxASTDepth)
	}
	return nil
}

// AstToParsedExpr converts an Ast to an protobuf ParsedExpr value.
func AstToParsedExpr(a *Ast) (*exprpb.ParsedExpr, error) {