foreach C++ macro. Takes a variable (will be an iterator. Don't instantiate!) and a container. Salvaged from http://stackoverflow.com/a/197926.

foreach.cpp

// Usage:
// foreach(it, container) {
//     CONTAINER_VALUE_TYPE v = *it
//     ...
// }
//
#ifndef FOREACH_MACRO
#define FOREACH_MACRO
#define VAR(V,init) __typeof(init) V=(init)
#define FOREACH(I,C) for(VAR(I,(C).begin());I!=(C).end();I++)
#define foreach(I, C) FOREACH(I,C)
#endif FOREACH_MACRO