+++ /dev/null
-/** @file parser_bugs.cpp
- *
- * Check for some silly bugs in the parser. */
-
-/*
- * GiNaC Copyright (C) 1999-2017 Johannes Gutenberg University Mainz, Germany
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
- */
-
-#include "ginac.h"
-using namespace GiNaC;
-
-#include <iostream>
-#include <sstream>
-#include <stdexcept>
-#include <string>
-
-// - a - b was misparsed as -a + b due to a bug in parser::parse_unary_expr()
-static int check1(std::ostream& err_str)
-{
- const std::string srep("-a-b");
- parser reader;
- ex e = reader(srep);
- ex a = reader.get_syms()["a"];
- ex b = reader.get_syms()["b"];
- ex g = - a - b;
- ex d = (e - g).expand();
- if (!d.is_zero()) {
- err_str << "\"" << srep << "\" was misparsed as \""
- << e << "\"" << std::endl;
- return 1;
- }
- return 0;
-}
-
-/// Parser was rejecting the valid expression '5 - (3*x)/10'.
-static int check2(std::ostream& err_str)
-{
- const std::string srep("5-(3*x)/10");
- parser reader;
- ex e = reader(srep);
- ex x = reader.get_syms()["x"];
- ex g = 5 - (3*x)/10;
- ex d = (e - g).expand();
- if (!d.is_zero()) {
- err_str << "\"" << srep << "\" was misparsed as \""
- << e << "\"" << std::endl;
- return 1;
- }
- return 0;
-}
-
-/// parse_literal_expr forget to consume the token, so parser get
-/// very confused.
-static int check3(std::ostream& err_str)
-{
- const std::string srep("5-(2*I)/3");
- parser reader;
- ex e = reader(srep);
- ex g = numeric(5) - (numeric(2)*I)/3;
- ex d = (e - g).expand();
- if (!d.is_zero()) {
- err_str << "\"" << srep << "\" was misparsed as \""
- << e << "\"" << std::endl;
- return 1;
- }
- return 0;
-}
-
-/// parser happily accepted various junk like 'x^2()+1'
-static int check4(std::ostream& err_str)
-{
- const std::string junk("x^2()+1");
- parser reader;
- ex e;
- try {
- e = reader(junk);
- err_str << "parser accepts junk: \"" << junk << "\"" << std::endl;
- return 1;
- } catch (parse_error& err) {
- // Ok, parser rejects the nonsense.
- return 0;
- }
-}
-
-int main(int argc, char** argv)
-{
- std::cout << "checking for parser bugs. " << std::flush;
- std::ostringstream err_str;
- int errors = 0;
- errors += check1(err_str);
- errors += check2(err_str);
- errors += check3(err_str);
- errors += check4(err_str);
- if (errors) {
- std::cout << "Yes, unfortunately:" << std::endl;
- std::cout << err_str.str();
- } else {
- std::cout << "Not found. ";
- }
- return errors;
-}