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Example-lexer

Lex*-exec

Tail-recursive version of lex* (to prevent stack overflows).

Signature
(lex*-exec sin acc) → (mv okp new-acc sin)

Definitions and Theorems

Function: lex*-exec

(defun lex*-exec (sin acc)
       (declare (xargs :stobjs (sin)))
       (declare (xargs :guard t))
       (let ((__function__ 'lex*-exec))
            (declare (ignorable __function__))
            (b* (((when (sin-endp sin)) (mv t acc sin))
                 ((mv tok1 sin) (lex1 sin))
                 ((unless tok1) (mv nil acc sin)))
                (lex*-exec sin (cons tok1 acc)))))