Function evaluateExpr

cel/folding.go:168–190

(ctx *OptimizerContext, a *ast.AST, navigableExpr ast.NavigableExpr, activation Activation)

}

func evaluateExpr(ctx *OptimizerContext, a *ast.AST, navigableExpr ast.NavigableExpr, activation Activation) (ref.Val, error) {
	partialActivation, err := ctx.PartialVars(activation)
	if err != nil {
		return nil, err
	}
	subAST := &Ast{
		impl: ast.NewCheckedAST(ast.NewAST(navigableExpr, a.SourceInfo()), a.TypeMap(), a.ReferenceMap()),
	}
	prg, err := ctx.Program(subAST)
	if err != nil {
		return nil, errCannotFold
	}
	// Folding will not attempt to call async functions which are all marked as late-bound,
	// but the presence of such functions requires the use of `ConcurrentEval` in order to
	// avoid an early return error which blocks async functions from running in `Eval` and
	// `ContextEval` call paths.
	resCh := prg.ConcurrentEval(context.Background(), partialActivation)
	res := <-resCh
	if res.Err != nil || types.IsUnknown(res.Val) {
		return nil, errCannotFold
	}
	return res.Val, nil
}

func isLateBoundFunctionCall(ctx *OptimizerContext, expr ast.Expr) bool {
	call := expr.AsCall()