Method setAlias

include/ast/component/declarator.h:167–167

  const Alias &getAlias() const noexcept { return *std::get_if<Alias>(&Decl); }
  void setAlias(Alias &&A) noexcept { Decl.emplace<Alias>(std::move(A)); }

  const ExportDecl &getExport() const noexcept {
    return *std::get_if<ExportDecl>(&Decl);