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documented record?, which has a slightly wider interface so that I can write automated tests for the raw functionality

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(cherry picked from commit 42bceaf900)
This commit is contained in:
Matthias Felleisen 2010-10-27 10:21:14 -04:00 committed by Eli Barzilay
parent 7318fc10ce
commit 0ac7d8f29a
1 changed files with 10 additions and 6 deletions
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16
collects/teachpack/2htdp/scribblings/universe.scrbl
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@ -167,7 +167,7 @@ The design of a world program demands that you come up with a data
(to-draw draw-expr width-expr height-expr)
(stop-when stop-expr) (stop-when stop-expr last-scene-expr)
(check-with world?-expr)
(record? boolean-expr)
(record? r-expr)
(state boolean-expr)
(on-receive rec-expr)
(register IP-expr)
@ -470,12 +470,16 @@ and @scheme[big-bang] will close down all event handling.}
@item{
@defform[(record? boolean-expr)
@defform[(record? r-expr)
#:contracts
([boolean-expr boolean?])]{
tells DrRacket to record all events and to enable a replay of the entire
interaction. The replay action also generates one png image per scene and
an animated gif for the entire sequence.
([r-expr any/c])]{
tells DrRacket to enable a visual replay of the interaction,
unless @scheme[#false].
The replay action generates one png image per scene and
an animated gif for the entire sequence in the directory of the user's
choice. If @scheme[r-expr] evaluates to the name of an existing
directory/folder (in the local directory/folder), the directory is used to
deposit the images.
}}
@item{