Fixed build wornings

example/enter_leave.cc

@@ -0,0 +1,39 @@
+//
+//  enter_leave.cc
+//
+//  Copyright (c) 2023 Yuji Hirose. All rights reserved.
+//  MIT License
+//
+
+#include <cstdlib>
+#include <iostream>
+#include <peglib.h>
+
+using namespace peg;
+
+int main(void) {
+  parser parser(R"(
+    S <- A+
+    A <- 'A'
+  )");
+
+  parser["A"].enter = [](const Context & /*c*/, const char * /*s*/,
+                         size_t /*n*/, std::any & /*dt*/) {
+    std::cout << "enter" << std::endl;
+  };
+
+  parser["A"] = [](const SemanticValues & /*vs*/, std::any & /*dt*/) {
+    std::cout << "action!" << std::endl;
+  };
+
+  parser["A"].leave = [](const Context & /*c*/, const char * /*s*/,
+                         size_t /*n*/, size_t /*matchlen*/,
+                         std::any & /*value*/, std::any & /*dt*/) {
+    std::cout << "leave" << std::endl;
+  };
+
+  if (parser.parse("A")) { return 0; }
+
+  std::cout << "syntax error..." << std::endl;
+  return -1;
+}

example/sequence.cc

@@ -0,0 +1,29 @@
+//
+//  sequence.cc
+//
+//  Copyright (c) 2023 Yuji Hirose. All rights reserved.
+//  MIT License
+//
+
+#include <cstdlib>
+#include <iostream>
+#include <peglib.h>
+
+using namespace peg;
+
+int main(void) {
+  parser parser(R"(
+START       <- SEQUENCE_A
+SEQUENCE_A  <- SEQUENCE('A')
+SEQUENCE(X) <- X (',' X)*
+  )");
+
+  parser["SEQUENCE_A"] = [](const SemanticValues & /*vs*/) {
+    std::cout << "SEQUENCE_A" << std::endl;
+  };
+
+  if (parser.parse("A,A")) { return 0; }
+
+  std::cout << "syntax error..." << std::endl;
+  return -1;
+}