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[bpt/guile.git] / doc / ref / scheme-translation.texi

@c -*-texinfo-*-
@c This is part of the GNU Guile Reference Manual.
@c Copyright (C)  1996, 1997, 2000, 2001, 2002, 2003, 2004
@c   Free Software Foundation, Inc.
@c See the file guile.texi for copying conditions.

@page
@node Translation
@chapter Support for Translating Other Languages

[Describe translation framework.]

@menu
* Emacs Lisp Support::          Helper primitives for Emacs Lisp.
@end menu


@node Emacs Lisp Support
@section Emacs Lisp Support

@deffn {Scheme Procedure} nil-car x
@deffnx {C Function} scm_nil_car (x)
Return the car of @var{x}, but convert it to LISP nil if it
is Scheme's end-of-list.
@end deffn

@deffn {Scheme Procedure} nil-cdr x
@deffnx {C Function} scm_nil_cdr (x)
Return the cdr of @var{x}, but convert it to LISP nil if it
is Scheme's end-of-list.
@end deffn

@deffn {Scheme Procedure} nil-cons x y
@deffnx {C Function} scm_nil_cons (x, y)
Create a new cons cell with @var{x} as the car and @var{y} as
the cdr, but convert @var{y} to Scheme's end-of-list if it is
a Lisp nil.
@end deffn

@deffn {Scheme Procedure} nil-eq x y
Compare @var{x} and @var{y} and return Lisp's t if they are
@code{eq?}, return Lisp's nil otherwise.
@end deffn

@deffn {Scheme Procedure} null x
@deffnx {C Function} scm_null (x)
Return Lisp's @code{t} if @var{x} is nil in the LISP sense,
return Lisp's nil otherwise.
@end deffn


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