Function optFlatMap

cel/library.go:651–691

(meh MacroExprFactory, target ast.Expr, args []ast.Expr)

}

func optFlatMap(meh MacroExprFactory, target ast.Expr, args []ast.Expr) (ast.Expr, *Error) {
	varIdent := args[0]
	varName := ""
	switch varIdent.Kind() {
	case ast.IdentKind:
		varName = varIdent.AsIdent()
	default:
		return nil, meh.NewError(varIdent.ID(), "optFlatMap() variable name must be a simple identifier")
	}
	mapExpr := args[1]
	targetIdent := target
	if target.Kind() != ast.IdentKind {
		targetIdent = meh.NewIdent(targetVar)
	}
	res := meh.NewCall(
		operators.Conditional,
		meh.NewMemberCall(hasValueFunc, targetIdent),
		meh.NewComprehension(
			meh.NewList(),
			unusedIterVar,
			varName,
			meh.NewMemberCall(valueFunc, meh.Copy(targetIdent)),
			meh.NewLiteral(types.False),
			meh.NewIdent(varName),
			mapExpr,
		),
		meh.NewCall(optionalNoneFunc),
	)
	if target.Kind() != ast.IdentKind {
		return meh.NewComprehension(
			meh.NewList(),
			unusedIterVar,
			targetVar,
			target,
			meh.NewLiteral(types.False),
			meh.NewIdent(targetVar),
			res,
		), nil
	}
	return res, nil
}

func optUnwrap(value ref.Val) ref.Val {
	list := value.(traits.Lister)