Function bindings_macros

extensions/bindings_ext.cc:52–71

}  // namespace

std::vector<Macro> bindings_macros() {
  absl::StatusOr<Macro> cel_bind = Macro::Receiver(
      kBind, 3,
      [](MacroExprFactory& factory, Expr& target,
         absl::Span<Expr> args) -> absl::optional<Expr> {
        if (!IsTargetNamespace(target)) {
          return absl::nullopt;
        }
        if (!args[0].has_ident_expr()) {
          return factory.ReportErrorAt(
              args[0], "cel.bind() variable name must be a simple identifier");
        }
        auto var_name = args[0].ident_expr().name();
        return factory.NewComprehension(kUnusedIterVar, factory.NewList(),
                                        std::move(var_name), std::move(args[1]),
                                        factory.NewBoolConst(false),
                                        std::move(args[0]), std::move(args[2]));
      });
  return {*cel_bind};
}

CompilerLibrary BindingsCompilerLibrary() {
  return CompilerLibrary("cel.lib.ext.bindings", &ConfigureParser);