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minor tweaking

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svn: r17310
This commit is contained in:
Eli Barzilay 2009-12-15 18:09:44 +00:00
parent 73d2fde4af
commit b6887adfe8
1 changed files with 7 additions and 5 deletions
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collects/scribblings/foreign/types.scrbl
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@ -935,15 +935,16 @@ expects arguments for both the super fields ands the new ones:
@section{Enumerations and Masks} @section{Enumerations and Masks}
Although the constructors below are describes as procedures,they are Although the constructors below are describes as procedures, they are
implemented as syntax, so that error messages can report a type name implemented as syntax, so that error messages can report a type name
where the syntactic context implies one. where the syntactic context implies one.
@defproc[(_enum [symbols list?][basetype ctype? _ufixint]) ctype?]{ @defproc[(_enum [symbols list?] [basetype ctype? _ufixint])
ctype?]{
Takes a list of symbols and generates an enumeration type. The Takes a list of symbols and generates an enumeration type. The
enumeration maps between the given @scheme[symbols] and integers, enumeration maps between a symbol in the given @scheme[symbols] list and
counting from @scheme[0]. corresponding integers, counting from @scheme[0].
The list @scheme[symbols] can also set the values of symbols by The list @scheme[symbols] can also set the values of symbols by
putting @scheme['=] and an exact integer after the symbol. For putting @scheme['=] and an exact integer after the symbol. For
@ -953,7 +954,8 @@ example, the list @scheme['(x y = 10 z)] maps @scheme['x] to
The @scheme[basetype] argument specifies the base type to use.} The @scheme[basetype] argument specifies the base type to use.}
@defproc[(_bitmask [symbols (or symbol? list?)][basetype ctype? _uint]) ctype?]{ @defproc[(_bitmask [symbols (or symbol? list?)] [basetype ctype? _uint])
ctype?]{
Similar to @scheme[_enum], but the resulting mapping translates a list Similar to @scheme[_enum], but the resulting mapping translates a list
of symbols to a number and back, using @scheme[bitwise-ior]. A single of symbols to a number and back, using @scheme[bitwise-ior]. A single