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corrections from @jltaylor-us

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original commit: a499d394300750ad18278469e2196ca021d9e4aa
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Matthew Flatt 2017-05-01 15:21:14 -06:00
parent 211fe4cbd7
commit c9135367bc
1 changed files with 2 additions and 2 deletions
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csug/smgmt.stex
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@ -485,7 +485,7 @@ syntax for ephemeron pairs.
\endschemedisplay \endschemedisplay
\noindent \noindent
As for weak pairs, the last two expressions of the middle example As with weak pairs, the last two expressions of the middle example
above may in fact return \scheme{(a . b)} if a garbage collection above may in fact return \scheme{(a . b)} if a garbage collection
promoting the pair into an older generation occurs prior to the promoting the pair into an older generation occurs prior to the
assignment of \scheme{x} to \scheme{*}. In the last example above, assignment of \scheme{x} to \scheme{*}. In the last example above,
@ -504,7 +504,7 @@ reference, and that non-weak reference prevents the car field from becoming
\schemedisplay \schemedisplay
(ephemeron-pair? (ephemeron-cons 'a 'b)) ;=> #t (ephemeron-pair? (ephemeron-cons 'a 'b)) ;=> #t
(ephemeron-pair? (cons 'a 'b)) ;=> #f (ephemeron-pair? (cons 'a 'b)) ;=> #f
(ephemeron-pair? (weaj-cons 'a 'b)) ;=> #f (ephemeron-pair? (weak-cons 'a 'b)) ;=> #f
(ephemeron-pair? "oops") ;=> #f (ephemeron-pair? "oops") ;=> #f
\endschemedisplay \endschemedisplay