Capture the @<scanner>'s current position as a place, evaluate the
@<body-form>s as an implicit progn with the variable @<place> bound to the captured
place. When control leaves the @<body-form>s, the place is released. The return
Capture the @<scanner>'s current position as a place, evaluate the
@<body-form>s as an implicit progn with the variable @<place> bound to the captured
place. When control leaves the @<body-form>s, the place is released. The return