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Some improvements to the description

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svn: r17193
This commit is contained in:
Eli Barzilay 2009-12-05 02:30:44 +00:00
parent b5114a14c1
commit 49df9502a4
1 changed files with 8 additions and 7 deletions
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15
collects/syntax/scribblings/module-reader.scrbl
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@ -136,13 +136,14 @@ In some cases, the reader functions read the whole file, so there is
no need to iterate them (e.g., Scribble's @scheme[read-inside] and
@scheme[read-syntax-inside]). In these cases you can specify
@scheme[#:whole-body-readers?] as @scheme[#t] --- the readers are
expected to return a list of expressions in this case. If those
reader functions return a list with a single expression that begins
with @scheme[#%module-begin], then the @scheme[syntax/module-reader]
language will not inappropriately add another. This is to be
backwards-compatible with older code, and adding @scheme[#%module-begin]
in the reader functions or in the function specified by @scheme[#:wrapper1]
should be considered deprecated behavior.
expected to return a list of expressions in this case.
[If such whole-body reader functions return a list with a single
expression that begins with @scheme[#%module-begin], then the
@scheme[syntax/module-reader] language will not inappropriately add
another. This for backwards-compatibility with older code: having a
whole-body reader functions or wrapper functions that return a
@scheme[#%module-begin]-wrapped body is deprectaed.]
In addition, the two wrappers can return a different value than the
wrapped function. This introduces two more customization points for