/* Copyright (C) 1996 by Thomas Glen Smith.	All Rights Reserved. */
/* execnext.h APL2 V1.0.0 **********************************************
* Called by dottran, eachtran, execexed, execspex, slashtra,		 *
* to obtain the next function and/or argument to process.			 *
* Here's a table of outputs, given various inputs:				 *
*														 *
*		   noexit = execnext( &tok,		&axistok,  &op, NULL);	 *
* -------------------------------------------------------------------- *
* 1 + 2	   1				  .			.		 "2" (65533)	 *
*		   1				  +(65526/11)	.		 .			 *
*		   0				  .			.		 "1" (65533)	 *
* -------------------------------------------------------------------- *
* + 2	   1				  .			.		 "2" (65533)	 *
*		   1				  +(65526/11)	.		 .			 *
*		   0				  .			.		 .			 *
* -------------------------------------------------------------------- *
* a#10 20 30 1				  .			.		 "10 20 30"	 *
*		   1				  #(3)		.		 .			 *
*		   0				  .			.		 .			 *
* -------------------------------------------------------------------- *
* a[2]	   0				  .			.		 "20" (65533)	 *
* -------------------------------------------------------------------- *
* a[2]+1	   1				  .			.		 "1" (65533)	 *
*		   1				  +(65526/11)	.		 .			 *
*		   0				  .			.		 "20" (65533)	 *
* -------------------------------------------------------------------- *
* a+[1]a	   1				  .			.		 "a" (65532)	 *
*		   1				  +(65526/11)	"1"(65528) .			 *
*		   0				  .			.		 "a" (65532)	 *
* -------------------------------------------------------------------- *
* Returns 0 if processing should terminate for any reason, such as	 *
* aplerr not zero, or niladic function w/o return.				 *
***********************************************************************/