mirror of
https://github.com/RPCS3/llvm-mirror.git
synced 2024-10-19 11:02:59 +02:00
63a060a406
Like the already existing zip_shortest/zip_first iterators, zip_longest iterates over multiple iterators at once, but has as many iterations as the longest sequence. This means some iterators may reach the end before others do. zip_longest uses llvm::Optional's None value to mark a past-the-end value. zip_longest is not reverse-iteratable because the tuples iterated over would be different for different length sequences (IMHO for the same reason neither zip_shortest nor zip_first should be reverse-iteratable; one can still reverse the ranges individually if that's the expected behavior). In contrast to zip_shortest/zip_first, zip_longest tuples contain rvalues instead of references. This is because llvm::Optional cannot contain reference types and the value-initialized default does not have a memory location a reference could point to. The motivation for these iterators is to use C++ foreach to compare two lists of ordered attributes in D48100 (SemaOverload.cpp and ASTReaderDecl.cpp). Idea by @hfinkel. Differential Revision: https://reviews.llvm.org/D48348 llvm-svn: 348301 |
||
|---|---|---|
| .. | ||
| ADT | ||
| Analysis | ||
| AsmParser | ||
| BinaryFormat | ||
| Bitcode | ||
| CodeGen | ||
| DebugInfo | ||
| Demangle | ||
| ExecutionEngine | ||
| FuzzMutate | ||
| IR | ||
| LineEditor | ||
| Linker | ||
| MC | ||
| MI | ||
| Object | ||
| ObjectYAML | ||
| Option | ||
| OptRemarks | ||
| Passes | ||
| ProfileData | ||
| Support | ||
| Target | ||
| TextAPI | ||
| tools | ||
| Transforms | ||
| XRay | ||
| CMakeLists.txt | ||
| unittest.cfg.in | ||