jnk/p-test.cpp

   1 #include <iostream>
   2
   3 #include <tao/pegtl.hpp>
   4 #include <tao/pegtl/contrib/abnf.hpp>
   5 #include <tao/pegtl/contrib/alphabet.hpp>
   6
   7 using namespace tao::pegtl;
   8 using namespace tao::pegtl::abnf;
   9 using namespace tao::pegtl::alphabet;
  10
  11 #include <glog/logging.h>
  12
  13 namespace smtp {
  14
  15 struct Ctx {
  16 };
  17
  18 struct String : plus<sor<ALPHA, DIGIT>> {
  19 };
  20
  21 struct foo : seq<TAOCPP_PEGTL_ISTRING("FOO"), opt<SP, String>, CRLF> {
  22 };
  23
  24 struct bar : seq<TAOCPP_PEGTL_ISTRING("BAR "), String, CRLF> {
  25 };
  26
  27 struct baz : seq<TAOCPP_PEGTL_ISTRING("BAZ"), CRLF> {
  28 };
  29
  30 struct quit : seq<TAOCPP_PEGTL_ISTRING("QUIT"), CRLF> {
  31 };
  32
  33 struct lng : seq<TAOCPP_PEGTL_ISTRING("SUPERLONGTHING"), CRLF> {
  34 };
  35
  36 struct any_cmd : seq<sor<baz, foo, bar, quit, lng>, discard> {
  37 };
  38
  39 struct cmds : plus<any_cmd> {
  40 };
  41
  42 struct grammar : seq<cmds, eof> {
  43 };
  44
  45 template <typename Rule>
  46 struct action : nothing<Rule> {
  47 };
  48
  49 template <>
  50 struct action<foo> {
  51   template <typename Input>
  52   static void apply(const Input& in, Ctx& ctx)
  53   {
  54     std::cout << "foo";
  55     if (in.string().length())
  56       std::cout << " " << in.string();
  57     std::cout << "\n";
  58   }
  59 };
  60
  61 template <>
  62 struct action<bar> {
  63   template <typename Input>
  64   static void apply(const Input& in, Ctx& ctx)
  65   {
  66     std::cout << "bar " << in.string() << '\n';
  67   }
  68 };
  69
  70 template <>
  71 struct action<baz> {
  72   static void apply0(Ctx& ctx) { std::cout << "baz\n"; }
  73 };
  74
  75 template <>
  76 struct action<quit> {
  77   static void apply0(Ctx& ctx) { std::cout << "quit\n"; }
  78 };
  79 } // namespace smtp
  80
  81 int main(int argc, char const* argv[])
  82 {
  83   std::ios::sync_with_stdio(false);
  84   google::InitGoogleLogging(argv[0]);
  85
  86   smtp::Ctx ctx;
  87   istream_input<eol::crlf> in(std::cin, 20, "cin");
  88
  89   std::cout << "250 start\n";
  90
  91   try {
  92     LOG(INFO) << "calling parse";
  93     parse<smtp::grammar, smtp::action>(in, ctx);
  94     LOG(INFO) << "parse return";
  95   }
  96   catch (parse_error const& e) {
  97     std::cout << e.what() << '\n';
  98     return 1;
  99   }
 100 }