Add Regex::sub, for doing regular expression substitution with backreferences.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@96503 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/unittests/Support/RegexTest.cpp b/unittests/Support/RegexTest.cpp
index 44c7e55..65b66c3 100644
--- a/unittests/Support/RegexTest.cpp
+++ b/unittests/Support/RegexTest.cpp
@@ -62,4 +62,33 @@
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'");
+}
+
}