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== Dynamic loading of DLL/DSOs == Example of loading OpenCL dynamically. Uses a Python parser script to create special header file with defines that map both functions and does appropriate type conversion. https://github.com/opencv/opencv/pull/1542/files [[http://www.boost.org/doc/libs/master/doc/html/boost_dll.html|Boost.DLL]]: Boost library for easily loading DLLs (e.g. for plugins). Cross platform, but requires runtime libraryes boost_system (integrated into C++11?) and boost_filesystem (integrated into C++17). |
Contents
See also:
C++ style guides
Qt's Coding Style and Coding Conventions
isocpp/CppCoreGuidelines: The C++ Core Guidelines are a set of tried-and-true guidelines, rules, and best practices about coding in C++, from Bjarne Stroustrup and Herb Sutter. More easily readable version
`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
C++ and Python
pybind/pybind11: Seamless operability between C++11 and Python
tbenthompson/cppimport: Import C++ files directly from Python!
C stuff
Not C++, but this page is as good a place to put this as any.
STL
Wrap an existing C-style pointer to an array with std::vector: http://stackoverflow.com/a/15203325/14878; modifies std::vector internals to work.
C++11
Smart pointers
Stuff
awesome-cpp: A curated list of awesome C/C++ frameworks, libraries, resources, and shiny things. Inspired by awesome-... stuff.
Dynamic loading of DLL/DSOs
Example of loading OpenCL dynamically. Uses a Python parser script to create special header file with defines that map both functions and does appropriate type conversion. https://github.com/opencv/opencv/pull/1542/files
Boost.DLL: Boost library for easily loading DLLs (e.g. for plugins). Cross platform, but requires runtime libraryes boost_system (integrated into C++11?) and boost_filesystem (integrated into C++17).
