Function MakeMapComprehension

extensions/lists_functions.cc:395–406

Create an expression equivalent to: target.map(varIdent, mapExpr)

// Create an expression equivalent to:
//   target.map(varIdent, mapExpr)
absl::optional<Expr> MakeMapComprehension(MacroExprFactory& factory,
                                          Expr target, Expr var_ident,
                                          Expr map_expr) {
  auto step = factory.NewCall(
      google::api::expr::common::CelOperator::ADD, factory.NewAccuIdent(),
      factory.NewList(factory.NewListElement(std::move(map_expr))));
  auto var_name = var_ident.ident_expr().name();
  return factory.NewComprehension(std::move(var_name), std::move(target),
                                  factory.AccuVarName(), factory.NewList(),
                                  factory.NewBoolConst(true), std::move(step),
                                  factory.NewAccuIdent());
}

// Create an expression equivalent to:
//   cel.bind(varIdent, varExpr, call_expr)