javacc-7.0.3.examples.JJTreeExamples.cpp.eg3.eg3.cc Maven / Gradle / Ivy

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JavaCC is a parser/scanner generator for Java.

There is a newer version: 7.0.13

#include 
#include 
#include 
#include 
#include 
#include "Parser.h"
#include "ParseException.h"
#include "ParserTree.h"
#include "ParserTokenManager.h"

using namespace std;
using namespace EG3;

JAVACC_STRING_TYPE ReadFileFully(char *file_name) {
//	JAVACC_STRING_TYPE s;
//#if WIDE_CHAR
//	wifstream in;
//#else
//	ifstream in;
//#endif
//	in.open(file_name, ios::in);
//	// Very inefficient.
//	while (!in.eof()) {
//		s += in.get();
//	}
	return "1 + 2 * (a + b);\n";//s;
}

int main(int argc, char** argv) {
	cout << "Reading from standard input..." << endl;
	JAVACC_STRING_TYPE s = ReadFileFully(argv[1]);
	try {
	CharStream *stream = new CharStream(s.c_str(), s.size() - 1, 1, 1);
	ParserTokenManager *scanner = new ParserTokenManager(stream);
	Parser parser(scanner);
	ASTStart* n = parser.Start();
	n->dump("");
	cout << "Thank you." << endl;
	} catch (const ParseException& e) {

	}
	return 0;
}