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Add generic support for hashing StringRef objects using the new hashing library.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@152003 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Chandler Carruth
2012-03-04 10:55:27 +00:00
parent e3e394d982
commit 528f0bbe19
3 changed files with 30 additions and 0 deletions
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19
unittests/ADT/StringRefTest.cpp
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@ -9,6 +9,7 @@
#include "gtest/gtest.h"
#include "llvm/ADT/StringRef.h"
#include "llvm/ADT/Hashing.h"
#include "llvm/ADT/SmallVector.h"
#include "llvm/Support/raw_ostream.h"
using namespace llvm;
@ -291,4 +292,22 @@ TEST(StringRefTest, Misc) {
EXPECT_EQ("hello", OS.str());
}
TEST(StringRefTest, Hashing) {
EXPECT_EQ(hash_value(std::string()), hash_value(StringRef()));
EXPECT_EQ(hash_value(std::string()), hash_value(StringRef("")));
std::string S = "hello world";
hash_code H = hash_value(S);
EXPECT_EQ(H, hash_value(StringRef("hello world")));
EXPECT_EQ(H, hash_value(StringRef(S)));
EXPECT_NE(H, hash_value(StringRef("hello worl")));
EXPECT_EQ(hash_value(std::string("hello worl")),
hash_value(StringRef("hello worl")));
EXPECT_NE(H, hash_value(StringRef("hello world ")));
EXPECT_EQ(hash_value(std::string("hello world ")),
hash_value(StringRef("hello world ")));
EXPECT_EQ(H, hash_value(StringRef("hello world\0")));
EXPECT_NE(hash_value(std::string("ello worl")),
hash_value(StringRef("hello world").slice(1, -1)));
}
} // end anonymous namespace