forked from OSchip/llvm-project
2bb94cd0dd
Often you have a unique_ptr<T> where T supports LLVM's
casting methods, and you wish to cast it to a unique_ptr<U>.
Prior to this patch, this requires doing hacky things like:
unique_ptr<U> Casted;
if (isa<U>(Orig.get()))
Casted.reset(cast<U>(Orig.release()));
This is overly verbose, and it would be nice to just be able
to use unique_ptr directly with cast and dyn_cast. To this end,
this patch updates cast<> to work directly with unique_ptr<T>,
so you can now write:
auto Casted = cast<U>(std::move(Orig));
Since it's possible for dyn_cast<> to fail, however, we choose
to use a slightly different API here, because it's awkward to
write
if (auto Casted = dyn_cast<U>(std::move(Orig))) {}
when Orig may end up not having been moved at all. So the
interface for dyn_cast is
if (auto Casted = unique_dyn_cast<U>(Orig)) {}
Where the inclusion of `unique` in the name of the cast operator
re-affirms that regardless of success of or fail of the casting,
exactly one of the input value and the return value will contain
a non-null result.
Differential Revision: https://reviews.llvm.org/D31890
llvm-svn: 300098
|
||
|---|---|---|
| .. | ||
| ARMAttributeParser.cpp | ||
| AlignOfTest.cpp | ||
| AllocatorTest.cpp | ||
| ArrayRecyclerTest.cpp | ||
| BinaryStreamTest.cpp | ||
| BlockFrequencyTest.cpp | ||
| BranchProbabilityTest.cpp | ||
| CMakeLists.txt | ||
| CachePruningTest.cpp | ||
| Casting.cpp | ||
| Chrono.cpp | ||
| CommandLineTest.cpp | ||
| CompressionTest.cpp | ||
| ConvertUTFTest.cpp | ||
| DataExtractorTest.cpp | ||
| DebugTest.cpp | ||
| DwarfTest.cpp | ||
| EndianStreamTest.cpp | ||
| EndianTest.cpp | ||
| ErrorOrTest.cpp | ||
| ErrorTest.cpp | ||
| FileOutputBufferTest.cpp | ||
| FormatVariadicTest.cpp | ||
| GlobPatternTest.cpp | ||
| Host.cpp | ||
| LEB128Test.cpp | ||
| LineIteratorTest.cpp | ||
| LockFileManagerTest.cpp | ||
| MD5Test.cpp | ||
| ManagedStatic.cpp | ||
| MathExtrasTest.cpp | ||
| MemoryBufferTest.cpp | ||
| MemoryTest.cpp | ||
| NativeFormatTests.cpp | ||
| Path.cpp | ||
| ProcessTest.cpp | ||
| ProgramTest.cpp | ||
| RegexTest.cpp | ||
| ReplaceFileTest.cpp | ||
| ScaledNumberTest.cpp | ||
| SourceMgrTest.cpp | ||
| SpecialCaseListTest.cpp | ||
| StringPool.cpp | ||
| SwapByteOrderTest.cpp | ||
| TarWriterTest.cpp | ||
| TargetParserTest.cpp | ||
| ThreadLocalTest.cpp | ||
| ThreadPool.cpp | ||
| Threading.cpp | ||
| TimerTest.cpp | ||
| TrailingObjectsTest.cpp | ||
| TrigramIndexTest.cpp | ||
| TypeNameTest.cpp | ||
| UnicodeTest.cpp | ||
| YAMLIOTest.cpp | ||
| YAMLParserTest.cpp | ||
| formatted_raw_ostream_test.cpp | ||
| raw_ostream_test.cpp | ||
| raw_pwrite_stream_test.cpp | ||
| raw_sha1_ostream_test.cpp | ||
| xxhashTest.cpp | ||