add new foreach for maps/mapiterators and many other iterators (actor/thinker/blockthings/blocklines)

[RicardoLuis0]

Usage:

foreach([key,] value : map/mapiterator)
{
    //...
}

foreach(actor_var|line_var [, position [, portalflags]] : blocklinesiterator/blockthingsiterator)
{
    //...
}

foreach([Type] var : actoriterator/thinkeriterator)
{
    //...
}

IteratorsForEachTest.zip

[RicardoLuis0]

will need some stub functions to compile on raze:

bool IsGameSpecificForEachLoop(FxForEachLoop * loop) { return false; }

FxExpression * ResolveGameSpecificForEachLoop(FxForEachLoop * loop) { return nullptr; }



bool HasGameSpecificTwoArgForEachLoopTypeNames() { return false; }

const char * GetGameSpecificTwoArgForEachLoopTypeNames() { return ""; }

bool IsGameSpecificTwoArgForEachLoop(FxTwoArgForEachLoop * loop) { return nullptr; }

FxExpression * ResolveGameSpecificTwoArgForEachLoop(FxTwoArgForEachLoop * loop) { return false; }



bool HasGameSpecificThreeArgForEachLoopTypeNames() { return false; }

const char * GetGameSpecificThreeArgForEachLoopTypeNames() { return ""; }

bool IsGameSpecificThreeArgForEachLoop(FxThreeArgForEachLoop * loop) { return false; }

FxExpression * ResolveGameSpecificThreeArgForEachLoop(FxThreeArgForEachLoop * loop) { return nullptr; }



bool HasGameSpecificTypedForEachLoopTypeNames() { return false; }

const char * GetGameSpecificTypedForEachLoopTypeNames() { return ""; }

bool IsGameSpecificTypedForEachLoop(FxTypedForEachLoop * loop) { return false; }

FxExpression * ResolveGameSpecificTypedForEachLoop(FxTypedForEachLoop * loop) { return nullptr; }