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| == C++ move semantics/perfect forwarding == * [[http://thbecker.net/articles/rvalue_references/section_01.html|C++ Rvalue References Explained]] * [[http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2006/n2027.html#Move_Semantics|Rvalue Reference Quick Look]] * [[http://en.cppreference.com/w/cpp/utility/move|std::move - cppreference.com]] * [[https://www.ibm.com/developerworks/community/blogs/5894415f-be62-4bc0-81c5-3956e82276f3/entry/RVO_V_S_std_move?lang=en|RVO V.S. std::move (C/C++ Cafe)]] * [[http://www.cprogramming.com/c++11/rvalue-references-and-move-semantics-in-c++11.html|Rvalue References and Move Semantics in C++11 - Cprogramming.com]] |
Contents
C++ style guides
`const` correctness
Formatting
ClangFormat: auto-formats C++ code
Git hook running clang-format. Don't use this!
Static analysis tools
Clang-Tidy: C/C++ linting tool, à la Google's cpplint.
clang-tidy -checks='*' *.cpp -- -std=c++11
Clang Static Analyzer: sets CC and CXX to use alternate compiler to do analysis
# Highest severity warnings only (i.e. memory leaks, etc)
cppcheck --enable=all *.cpp
# Everything except style-related linting
cppcheck --enable=warning,performance,portability,information,missingInclude \
--std=c++11 --library=std.cfg --verbose --quiet \
*.cpp
Overview articles:
Stuff I never remember
Unnecessary copies w/ `auto`
Beware unncessary copies w/ auto; default semantics is to make a copy.
// Typically there's no reason to copy.
for (const auto &Val : Container) { observe(Val); }
for (auto &Val : Container) { Val.change(); }
// Remove the reference if you really want a new copy.
for (auto Val : Container) { Val.change(); saveSomewhere(Val); }
// Copy pointers, but make it clear that they're pointers.
for (const auto *Ptr : Container) { observe(*Ptr); }
for (auto *Ptr : Container) { Ptr->change(); }
Don't evaluate `end()` in loops
// BAD
BasicBlock *BB = ...
for (BasicBlock::iterator I = BB->begin(); I != BB->end(); ++I)
// ... use I ...
// GOOD (unless you are mutating BB; use the above loop if you are, and document you are doing so)
BasicBlock *BB = ...
for (BasicBlock::iterator I = BB->begin(), E = BB->end(); I != E; ++I)
// ... use I ...
Use `const` iterators if not mutating a structure
Expanding on the above:
BasicBlock *BB = ...
for (BasicBlock::const_iterator I = BB->cbegin(), E = BB->cend(); I != E; ++I)
// ... use I ...
C++ move semantics/perfect forwarding
Stuff
awesome-cpp: A curated list of awesome C/C++ frameworks, libraries, resources, and shiny things. Inspired by awesome-... stuff.
