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When a {} repeat sequence is invalid or incomplete, and the language is Perl, then backtrack and treat the sequence as a literal, not a repeat operator.

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Fixes #8569.

[SVN r84371]
This commit is contained in:
John Maddock
2013-05-19 11:12:14 +00:00
parent 8a16bff57a
commit 66d8b8140a
2 changed files with 64 additions and 29 deletions
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25
test/regress/test_simple_repeats.cpp
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@ -179,21 +179,20 @@ void test_simple_repeats2()
{
using namespace boost::regex_constants;
TEST_INVALID_REGEX("a{}", perl);
TEST_INVALID_REGEX("a{", perl);
TEST_INVALID_REGEX("a{1", perl);
TEST_INVALID_REGEX("a{1,", perl);
TEST_INVALID_REGEX("a{1,2", perl);
TEST_INVALID_REGEX("a{ 1 , 2 ", perl);
TEST_INVALID_REGEX("a{ }", perl);
TEST_INVALID_REGEX("a}", perl);
TEST_REGEX_SEARCH("a{}", basic, "a{}", match_default, make_array(0, 3, -2, -2));
TEST_REGEX_SEARCH("a{", basic, "a{", match_default, make_array(0, 2, -2, -2));
TEST_REGEX_SEARCH("a{1", basic, "a{1", match_default, make_array(0, 3, -2, -2));
TEST_REGEX_SEARCH("a{1,", basic, "a{1,", match_default, make_array(0, 4, -2, -2));
TEST_REGEX_SEARCH("a{1,2", basic, "a{1,2", match_default, make_array(0, 5, -2, -2));
TEST_REGEX_SEARCH("a{ 1 , 2", basic, "a{ 1 , 2", match_default, make_array(0, 8, -2, -2));
TEST_REGEX_SEARCH("a{ }", basic, "a{ }", match_default, make_array(0, 4, -2, -2));
TEST_REGEX_SEARCH("a}", basic, "a}", match_default, make_array(0, 2, -2, -2));
TEST_INVALID_REGEX("{1}", perl);
TEST_INVALID_REGEX("a{b}", perl);
TEST_INVALID_REGEX("a{1b}", perl);
TEST_INVALID_REGEX("a{1,b}", perl);
TEST_INVALID_REGEX("a{1,2v}", perl);
TEST_REGEX_SEARCH("a{b}", basic, "a{b}", match_default, make_array(0, 4, -2, -2));
TEST_REGEX_SEARCH("a{1b", basic, "a{1b", match_default, make_array(0, 4, -2, -2));
TEST_REGEX_SEARCH("a{1,b}", basic, "a{1,b}", match_default, make_array(0, 6, -2, -2));
TEST_REGEX_SEARCH("a{1,2v}", basic, "a{1,2v}", match_default, make_array(0, 7, -2, -2));
TEST_INVALID_REGEX("a{2,1}", perl);
// now try operator \\{\\} for POSIX basic regexes
TEST_REGEX_SEARCH("a\\{2\\}", basic, "a", match_default, make_array(-2, -2));
TEST_REGEX_SEARCH("a\\{2\\}", basic|no_intervals, "a{2}", match_default, make_array(0, 4, -2, -2));