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doc clarifications on `eq?'

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This commit is contained in:
Matthew Flatt 2011-09-12 19:16:57 -06:00
parent b7bef3b3aa
commit c5131d428c
2 changed files with 7 additions and 3 deletions
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5
collects/scribblings/reference/booleans.scrbl
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@ -5,8 +5,9 @@
True and false @deftech{booleans} are represented by the values
@racket[#t] and @racket[#f], respectively, though operations that
depend on a boolean value typically treat anything other than @racket[#f]
as true.
depend on a boolean value typically treat anything other than
@racket[#f] as true. The @racket[#t] value is always @racket[eq?] to
itself, and @racket[#f] is always @racket[eq?] to itself.
See also: @racket[and], @racket[or], @racket[andmap], @racket[ormap].

5
collects/scribblings/reference/data.scrbl
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@ -227,7 +227,10 @@ Sets the content of @racket[box] to @racket[v].}
The constant @|void-const| is returned by most forms and procedures
that have a side-effect and no useful result. The constant
@|undefined-const| is used as the initial value for @racket[letrec]
bindings.
bindings.
The @|void-const| value is always @racket[eq?] to itself, and the
@|undefined-const| value is also @racket[eq?] to itself.
@defproc[(void? [v any/c]) void?]{Returns @racket[#t] if @racket[v] is the
constant @|void-const|, @racket[#f] otherwise.}