Brief description

Clang-based standalone tool that detects for-loops with postfix operators.

Example

Input:

#include <cstdlib>

#include <vector>

inline void
doNothing()
{
    // do nothing on purpose
}

int
main(void)
{
    std::vector<int> v;
    typedef std::vector<int> intVector;

    for (intVector::const_iterator cit = v.begin(); cit != v.end(); cit++) {
        doNothing();
    }

    for (intVector::const_iterator cit = v.begin(); cit != v.end(); ++cit) {
        doNothing();
    }

    for (intVector::const_iterator cit = v.begin(); cit != v.end(); cit--) {
        doNothing();
    }

    for (intVector::const_iterator cit = v.begin(); cit != v.end(); --cit) {
        doNothing();
    }

    return EXIT_SUCCESS;
}

Run command:

bin/for-postfix vector-all.cpp --

Output (paths are truncated):

.../vector-all.cpp:17:dangerous use of postfix operator
.../vector-all.cpp:25:dangerous use of postfix operator

Building

1. Clone the repository to llvm/tools/clang/tools/extra.
2. Add add_subdirectory(for-postfix) to CMakeLists.txt in the same directory.
3. Run ninja for-postfix inside your LLVM's build/ directory.