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-rw-r--r--llvm/lib/Support/Regex.cpp2
-rw-r--r--llvm/unittests/Support/RegexTest.cpp9
2 files changed, 11 insertions, 0 deletions
diff --git a/llvm/lib/Support/Regex.cpp b/llvm/lib/Support/Regex.cpp
index e8344ef74d9..60ce528e577 100644
--- a/llvm/lib/Support/Regex.cpp
+++ b/llvm/lib/Support/Regex.cpp
@@ -19,6 +19,8 @@
#include <string>
using namespace llvm;
+Regex::Regex() : error(REG_BADPAT), preg(nullptr) {}
+
Regex::Regex(StringRef regex, unsigned Flags) {
unsigned flags = 0;
preg = new llvm_regex();
diff --git a/llvm/unittests/Support/RegexTest.cpp b/llvm/unittests/Support/RegexTest.cpp
index c045c49bc3d..7b61a03dd9b 100644
--- a/llvm/unittests/Support/RegexTest.cpp
+++ b/llvm/unittests/Support/RegexTest.cpp
@@ -153,4 +153,13 @@ TEST_F(RegexTest, MoveAssign) {
EXPECT_TRUE(r2.match("916"));
}
+TEST_F(RegexTest, NoArgConstructor) {
+ std::string Error;
+ Regex r1;
+ EXPECT_FALSE(r1.isValid(Error));
+ EXPECT_EQ("invalid regular expression", Error);
+ r1 = Regex("abc");
+ EXPECT_TRUE(r1.isValid(Error));
+}
+
}
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