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Add a Python-like join function to merge a list of strings with a

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separator between each two elements.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@189846 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Joerg Sonnenberger
2013-09-03 20:43:54 +00:00
parent b81d7a8912
commit f57a80f494
2 changed files with 70 additions and 0 deletions
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27
unittests/ADT/StringRefTest.cpp
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@ -8,6 +8,7 @@
//===----------------------------------------------------------------------===//
#include "llvm/ADT/StringRef.h"
#include "llvm/ADT/StringExtras.h"
#include "llvm/ADT/Hashing.h"
#include "llvm/ADT/SmallVector.h"
#include "llvm/Support/raw_ostream.h"
@ -477,6 +478,32 @@ TEST(StringRefTest, getAsUnsignedIntegerBadStrings) {
}
}
static const char *join_input[] = { "a", "b", "c" };
static const char join_result1[] = "a";
static const char join_result2[] = "a:b:c";
static const char join_result3[] = "a::b::c";
TEST(StringRefTest, joinStrings) {
std::vector<StringRef> v1;
std::vector<std::string> v2;
for (size_t i = 0; i < array_lengthof(join_input); ++i) {
v1.push_back(join_input[i]);
v2.push_back(join_input[i]);
}
bool v1_join1 = join(v1.begin(), v1.begin() + 1, ":") == join_result1;
EXPECT_TRUE(v1_join1);
bool v1_join2 = join(v1.begin(), v1.end(), ":") == join_result2;
EXPECT_TRUE(v1_join2);
bool v1_join3 = join(v1.begin(), v1.end(), "::") == join_result3;
EXPECT_TRUE(v1_join3);
bool v2_join1 = join(v2.begin(), v2.begin() + 1, ":") == join_result1;
EXPECT_TRUE(v2_join1);
bool v2_join2 = join(v2.begin(), v2.end(), ":") == join_result2;
EXPECT_TRUE(v2_join2);
bool v2_join3 = join(v2.begin(), v2.end(), "::") == join_result3;
EXPECT_TRUE(v2_join3);
}
} // end anonymous namespace