72ce0c8073
This patch enables throwing exceptions for invalid backreferences in the constructor when using the basic, extended, grep, or egrep grammar. This fixes bug 34297. Differential Revision: https://reviews.llvm.org/D62453
93 lines
4.2 KiB
C++
93 lines
4.2 KiB
C++
//===----------------------------------------------------------------------===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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// UNSUPPORTED: libcpp-no-exceptions
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// <regex>
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// template <class charT, class traits = regex_traits<charT>> class basic_regex;
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// template <class ST, class SA>
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// basic_regex(const basic_string<charT, ST, SA>& s);
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#include <regex>
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#include <cassert>
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#include "test_macros.h"
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static bool error_badbackref_thrown(const char *pat, std::regex::flag_type f)
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{
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bool result = false;
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try {
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std::regex re(pat, f);
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} catch (const std::regex_error &ex) {
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result = (ex.code() == std::regex_constants::error_backref);
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}
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return result;
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}
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int main(int, char**)
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{
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// no references
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assert(error_badbackref_thrown("\\1abc", std::regex_constants::ECMAScript));
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assert(error_badbackref_thrown("\\1abd", std::regex::basic));
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assert(error_badbackref_thrown("\\1abd", std::regex::extended));
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assert(error_badbackref_thrown("\\1abd", std::regex::awk) == false);
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assert(error_badbackref_thrown("\\1abd", std::regex::grep));
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assert(error_badbackref_thrown("\\1abd", std::regex::egrep));
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// only one reference
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assert(error_badbackref_thrown("ab(c)\\2def", std::regex_constants::ECMAScript));
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assert(error_badbackref_thrown("ab\\(c\\)\\2def", std::regex_constants::basic));
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assert(error_badbackref_thrown("ab(c)\\2def", std::regex_constants::extended));
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assert(error_badbackref_thrown("ab\\(c\\)\\2def", std::regex_constants::awk) == false);
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assert(error_badbackref_thrown("ab(c)\\2def", std::regex_constants::awk) == false);
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assert(error_badbackref_thrown("ab\\(c\\)\\2def", std::regex_constants::grep));
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assert(error_badbackref_thrown("ab(c)\\2def", std::regex_constants::egrep));
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assert(error_badbackref_thrown("\\800000000000000000000000000000", std::regex_constants::ECMAScript)); // overflows
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// this should NOT throw, because we only should look at the '1'
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// See https://bugs.llvm.org/show_bug.cgi?id=31387
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{
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const char *pat1 = "a(b)c\\1234";
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std::regex re(pat1, pat1 + 7); // extra chars after the end.
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}
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// reference before group
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assert(error_badbackref_thrown("\\1(abc)", std::regex_constants::ECMAScript));
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assert(error_badbackref_thrown("\\1\\(abd\\)", std::regex::basic));
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assert(error_badbackref_thrown("\\1(abd)", std::regex::extended));
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assert(error_badbackref_thrown("\\1(abd)", std::regex::awk) == false);
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assert(error_badbackref_thrown("\\1\\(abd\\)", std::regex::awk) == false);
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assert(error_badbackref_thrown("\\1\\(abd\\)", std::regex::grep));
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assert(error_badbackref_thrown("\\1(abd)", std::regex::egrep));
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// reference limit
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assert(error_badbackref_thrown("(cat)\\10", std::regex::ECMAScript));
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assert(error_badbackref_thrown("\\(cat\\)\\10", std::regex::basic) == false);
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assert(error_badbackref_thrown("(cat)\\10", std::regex::extended) == false);
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assert(error_badbackref_thrown("\\(cat\\)\\10", std::regex::awk) == false);
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assert(error_badbackref_thrown("(cat)\\10", std::regex::awk) == false);
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assert(error_badbackref_thrown("\\(cat\\)\\10", std::regex::grep) == false);
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assert(error_badbackref_thrown("(cat)\\10", std::regex::egrep) == false);
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// https://bugs.llvm.org/show_bug.cgi?id=34297
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assert(error_badbackref_thrown("(cat)\\1", std::regex::basic));
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assert(error_badbackref_thrown("\\(cat\\)\\1", std::regex::basic) == false);
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assert(error_badbackref_thrown("(cat)\\1", std::regex::extended) == false);
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assert(error_badbackref_thrown("\\(cat\\)\\1", std::regex::extended));
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assert(error_badbackref_thrown("(cat)\\1", std::regex::awk) == false);
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assert(error_badbackref_thrown("\\(cat\\)\\1", std::regex::awk) == false);
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assert(error_badbackref_thrown("(cat)\\1", std::regex::grep));
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assert(error_badbackref_thrown("\\(cat\\)\\1", std::regex::grep) == false);
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assert(error_badbackref_thrown("(cat)\\1", std::regex::egrep) == false);
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assert(error_badbackref_thrown("\\(cat\\)\\1", std::regex::egrep));
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return 0;
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}
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