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added spring back to the docs

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svn: r11190
This commit is contained in:
Robby Findler 2008-08-11 21:02:49 +00:00
parent 80699eddb0
commit b90232f42d
1 changed files with 27 additions and 6 deletions
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33
collects/redex/redex.scrbl
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@ -1443,13 +1443,19 @@ explanation of logical-space):
@subsection{LW} @subsection{LW}
@deftogether[[ @deftogether[[
@defproc[(build-lw [e (or/c string? symbol? pict? (listof lw?))] @defproc[(build-lw [e (or/c string?
symbol?
pict?
(listof (or/c (symbols 'spring) lw?)))]
[line exact-positive-integer?] [line exact-positive-integer?]
[line-span exact-positive-integer?] [line-span exact-positive-integer?]
[column exact-positive-integer?] [column exact-positive-integer?]
[column-span exact-positive-integer?]) [column-span exact-positive-integer?])
lw?]{} lw?]{}
@defproc[(lw-e (lw lw?)) (or/c string? symbol? pict? (listof lw?))]{} @defproc[(lw-e (lw lw?)) (or/c string?
symbol?
pict?
(listof (or/c (symbols 'spring) lw?)))]{}
@defproc[(lw-line (lw lw?)) exact-positive-integer?]{} @defproc[(lw-line (lw lw?)) exact-positive-integer?]{}
@defproc[(lw-line-span (lw lw?)) exact-positive-integer?]{} @defproc[(lw-line-span (lw lw?)) exact-positive-integer?]{}
@defproc[(lw-column (lw lw?)) exact-positive-integer?]{} @defproc[(lw-column (lw lw?)) exact-positive-integer?]{}
@ -1546,10 +1552,25 @@ will be lined up underneath each other, but the relative
positions of "boys" and "fudge" will be determined by the positions of "boys" and "fudge" will be determined by the
natural size of the words as they rendered in the natural size of the words as they rendered in the
appropriate font. appropriate font.
}
There are two helper functions that make building When @scheme['spring] appears in the list in the @scheme[e]
lws easier: field of a @scheme[lw] struct, then it absorbs all of the
space around it. It is also used by @scheme[to-lw] when
constructing the picts for unquoted strings. For example, this expression
@schemeblock[,x]
corresponds to these structs:
@schemeblock[(build-lw (list (build-lw "" 1 0 9 0)
'spring
(build-lw x 1 0 10 1))
1 0 9 2)]
and the @scheme['spring] causes there to be no space between
the empty string and the @scheme[x] in the typeset output.
}
@deftogether[[ @deftogether[[
@defproc[(just-before [stuff (or/c pict? string? symbol?)] @defproc[(just-before [stuff (or/c pict? string? symbol?)]
@ -1559,7 +1580,7 @@ lws easier:
[lw lw?]) [lw lw?])
lw?]{}]]{ lw?]{}]]{
These functions build new lws whose contents are These two helper functions build new lws whose contents are
the first argument, and whose line and column are based on the first argument, and whose line and column are based on
the second argument, making the new loc wrapper be either the second argument, making the new loc wrapper be either
just before or just after that argument. The line-span and just before or just after that argument. The line-span and