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improve docs on numberers

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Closes #96
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Matthew Flatt 2017-03-29 07:12:13 -06:00
parent 9da2f4f40f
commit 92d9a0732d
1 changed files with 10 additions and 1 deletions
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scribble-doc/scribblings/scribble/core.scrbl
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@ -1351,7 +1351,7 @@ Returns the width in characters of the given @tech{block}.}
@defproc[(part-number-item? [v any/c]) boolean]{ @defproc[(part-number-item? [v any/c]) boolean]{
Return @racket[#t] if @racket[v] is @racket[#f], an exact non-negative Return @racket[#t] if @racket[v] is @racket[#f], an exact non-negative
integer, a string, or a list containing two strings. See @racket[part] integer, a string, or a list containing two strings. See @racket[collected-info]
for information on how different representations are used for numbering. for information on how different representations are used for numbering.
@history[#:added "6.4"]} @history[#:added "6.4"]}
@ -1400,6 +1400,15 @@ identity is based on a @racket[generated-tag]. The result of
number plus an updated hash table with an incremented value for the number plus an updated hash table with an incremented value for the
@tech{numberer}. @tech{numberer}.
Typically, the rendered form of a section number (produced by
@racket[numberer-step]) is a list containing two strings. The first
string is the part's immediate number, which can be combined with a
prefix for enclosing parts' numbers. The second string is a separator
that is placed after the part's number and before a subsection's
number for each subsection. If @racket[numberer-step] produces a plain
string for the rendered number, then it is not added as a prefix to
subsection numbers. See also @racket[collected-info].
@history[#:added "6.4"]} @history[#:added "6.4"]}