*	number in a format recognized by Tcl.
 *
 *	The arguments bytes, numBytes, and objPtr are the inputs which
 *	determine the string to be parsed. If bytes is non-NULL, it points to
 *	the first byte to be scanned. If bytes is NULL, then objPtr must be
 *	non-NULL, and the string representation of objPtr will be scanned
 *	(generated first, if necessary). The numBytes argument determines the
 *	number of bytes to be scanned. If numBytes is negative, the first NUL
 *	byte encountered will terminate the scan. If numBytes is non-negative,
 *	then no more than numBytes bytes will be scanned.
 *
 *	The argument flags is an input that controls the numeric formats
 *	recognized by the parser. The flag bits are:
 *
 *	- TCL_PARSE_INTEGER_ONLY:	accept only integer values; reject
 *		strings that denote floating point values (or accept only the
 *		leading portion of them that are integer values).