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sample-5.cpp
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59 lines (49 loc) · 812 Bytes
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#include <iostream>
#include <string>
#include <boost/lexical_cast.hpp>
#include <boost/function.hpp>
#include "peg.hpp"
using namespace peg;
using namespace std;
struct A {
string v;
void action_0(alpha l, const A &a, alpha r) {
v += l;
v += '(';
v += a.v;
v += ')';
v += r;
}
void action_1(alpha a) {
v += a;
}
};
struct B {
A v;
void action(const A& a, eoi) {
v = a;
}
};
void test(const string& s)
{
cout << s << " ---> ";
parser<B> parser;
B v;
if (!parser.parse(v, s.begin(), s.end())) {
cout << "parse error" << endl;
} else {
cout << "parse ok: " << v.v.v << endl;
}
}
int main()
{
test("a");
test("aa");
test("aaa");
test("aaaa");
test("aaaaa");
test("aaaaaa");
test("aaaaaaa");
test("aaaaaaaa");
return 0;
}