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Add Regex::sub, for doing regular expression substitution with backreferences.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@96503 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Daniel Dunbar
2010-02-17 20:08:42 +00:00
parent b886089645
commit d2a5c0d856
3 changed files with 118 additions and 0 deletions
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29
unittests/Support/RegexTest.cpp
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@ -62,4 +62,33 @@ TEST_F(RegexTest, Basics) {
EXPECT_TRUE(r5.match(String));
}
TEST_F(RegexTest, Substitution) {
std::string Error;
EXPECT_EQ("aNUMber", Regex("[0-9]+").sub("NUM", "a1234ber"));
// Standard Escapes
EXPECT_EQ("a\\ber", Regex("[0-9]+").sub("\\\\", "a1234ber", &Error));
EXPECT_EQ(Error, "");
EXPECT_EQ("a\nber", Regex("[0-9]+").sub("\\n", "a1234ber", &Error));
EXPECT_EQ(Error, "");
EXPECT_EQ("a\tber", Regex("[0-9]+").sub("\\t", "a1234ber", &Error));
EXPECT_EQ(Error, "");
EXPECT_EQ("ajber", Regex("[0-9]+").sub("\\j", "a1234ber", &Error));
EXPECT_EQ(Error, "");
EXPECT_EQ("aber", Regex("[0-9]+").sub("\\", "a1234ber", &Error));
EXPECT_EQ(Error, "replacement string contained trailing backslash");
// Backreferences
EXPECT_EQ("aa1234bber", Regex("a[0-9]+b").sub("a\\0b", "a1234ber", &Error));
EXPECT_EQ(Error, "");
EXPECT_EQ("a1234ber", Regex("a([0-9]+)b").sub("a\\1b", "a1234ber", &Error));
EXPECT_EQ(Error, "");
EXPECT_EQ("aber", Regex("a[0-9]+b").sub("a\\100b", "a1234ber", &Error));
EXPECT_EQ(Error, "invalid backreference string '100'");
}
}