X-Git-Url: http://demsky.eecs.uci.edu/git/?a=blobdiff_plain;f=unittests%2FSupport%2FRegexTest.cpp;h=3577d1015e915018a1b21cab5e68885fcca085fc;hb=fe532525cc4912ec0d1b4e91fa0396122dd087b3;hp=44c7e5590c738c3002d95e7041a4f7d354496aec;hpb=81f46d9ce1888308b33336f9bea72147430da36b;p=oota-llvm.git

diff --git a/unittests/Support/RegexTest.cpp b/unittests/Support/RegexTest.cpp
index 44c7e5590c7..3577d1015e9 100644
--- a/unittests/Support/RegexTest.cpp
+++ b/unittests/Support/RegexTest.cpp
@@ -7,9 +7,9 @@
 //
 //===----------------------------------------------------------------------===//
 
-#include "gtest/gtest.h"
 #include "llvm/Support/Regex.h"
 #include "llvm/ADT/SmallVector.h"
+#include "gtest/gtest.h"
 #include <cstring>
 
 using namespace llvm;
@@ -51,7 +51,6 @@ TEST_F(RegexTest, Basics) {
   EXPECT_EQ(1u, Matches.size());
   EXPECT_EQ(String, Matches[0].str());
 
-
   std::string NulPattern="X[0-9]+X([a-f])?:([0-9]+)";
   String="YX99a:513b";
   NulPattern[7] = '\0';
@@ -62,4 +61,55 @@ TEST_F(RegexTest, Basics) {
   EXPECT_TRUE(r5.match(String));
 }
 
+TEST_F(RegexTest, Backreferences) {
+  Regex r1("([a-z]+)_\\1");
+  SmallVector<StringRef, 4> Matches;
+  EXPECT_TRUE(r1.match("abc_abc", &Matches));
+  EXPECT_EQ(2u, Matches.size());
+  EXPECT_FALSE(r1.match("abc_ab", &Matches));
+
+  Regex r2("a([0-9])b\\1c\\1");
+  EXPECT_TRUE(r2.match("a4b4c4", &Matches));
+  EXPECT_EQ(2u, Matches.size());
+  EXPECT_EQ("4", Matches[1].str());
+  EXPECT_FALSE(r2.match("a2b2c3"));
+
+  Regex r3("a([0-9])([a-z])b\\1\\2");
+  EXPECT_TRUE(r3.match("a6zb6z", &Matches));
+  EXPECT_EQ(3u, Matches.size());
+  EXPECT_EQ("6", Matches[1].str());
+  EXPECT_EQ("z", Matches[2].str());
+  EXPECT_FALSE(r3.match("a6zb6y"));
+  EXPECT_FALSE(r3.match("a6zb7z"));
+}
+
+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'");
+}
+
 }