A silly question regarding function types

[Gary Oblock via Gcc]

Note, isn't a problem, rather, it's something that puzzles me.

On walking a function types argument types this way

for ( arg = TYPE_ARG_TYPES ( func_type);
       arg != NULL;
       arg = TREE_CHAIN ( arg))
    {
       .
       .
     }

I noticed an extra void argument that didn't exist
tagged on the end.

I then noticed other code doing this (which I copied:)

for ( arg = TYPE_ARG_TYPES ( func_type);
        arg != NULL && arg != void_list_node;
        arg = TREE_CHAIN ( arg))
     {
         .
         .
      }

What is going on here???

Thanks,

Gary



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