05/06/06 21:29:03
>>227
R5RS関連だろうと思ってたら、やっぱコレか。
PLT Foreign Interface Manual
PLT <scheme@plt-scheme.org>
299.100Released March 2005
URLﾘﾝｸ(download.plt-scheme.org)
2. Foreign Interface
This is a description of the foreign interface. The interface has some parts implemented in C (plt/src/foreign/foreign.c)
which is available as a built-in #%foreign module. This module is not intended for general use as is, and further
documentation can be found in the source. The relevant functionality is provided via the foreign module in MzLib
(foreign.ss).
2.2 Simple Types
2.2.4 Type Constructors
Since types are first-class values, there are several type constructors that build type objects. These are just the simple
ones, more constructors are described below. Note that they are listed as procedures, but implemented as syntax, so it
is possible to use a name where the syntactical context implies one (they can also be used as values, but error messages
will not have a meaningful name in this case).