/// string.
std::string sub(StringRef Repl, StringRef String, std::string *Error = 0);
+ /// \brief If this function returns true, ^Str$ is an extended regular
+ /// expression that matches Str and only Str.
+ static bool isLiteralERE(StringRef Str);
+
private:
struct llvm_regex *preg;
int error;
return Res;
}
+
+bool Regex::isLiteralERE(StringRef Str) {
+ // Check for regex metacharacters. This list was derived from our regex
+ // implementation in regcomp.c and double checked against the POSIX extended
+ // regular expression specification.
+ return Str.find_first_of("()^$|*+?.[]\\{}") == StringRef::npos;
+}
EXPECT_EQ(Error, "invalid backreference string '100'");
}
+TEST_F(RegexTest, IsLiteralERE) {
+ EXPECT_TRUE(Regex::isLiteralERE("abc"));
+ EXPECT_FALSE(Regex::isLiteralERE("a(bc)"));
+ EXPECT_FALSE(Regex::isLiteralERE("^abc"));
+ EXPECT_FALSE(Regex::isLiteralERE("abc$"));
+ EXPECT_FALSE(Regex::isLiteralERE("a|bc"));
+ EXPECT_FALSE(Regex::isLiteralERE("abc*"));
+ EXPECT_FALSE(Regex::isLiteralERE("abc+"));
+ EXPECT_FALSE(Regex::isLiteralERE("abc?"));
+ EXPECT_FALSE(Regex::isLiteralERE("abc."));
+ EXPECT_FALSE(Regex::isLiteralERE("a[bc]"));
+ EXPECT_FALSE(Regex::isLiteralERE("abc\\1"));
+ EXPECT_FALSE(Regex::isLiteralERE("abc{1,2}"));
+}
+
}