cpp-peglib/example/sequence.cc
2023-03-25 08:42:56 -04:00

30 lines
522 B
C++

//
// 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;
}