diff options
Diffstat (limited to 'doc/ref/guile')
-rw-r--r-- | doc/ref/guile/lens.texi | 47 |
1 files changed, 47 insertions, 0 deletions
diff --git a/doc/ref/guile/lens.texi b/doc/ref/guile/lens.texi new file mode 100644 index 00000000..eeddd6ca --- /dev/null +++ b/doc/ref/guile/lens.texi @@ -0,0 +1,47 @@ +@node Lenses +@section Lenses + +Provided by the module @code{(hnh util lens)} + +@defun modify object lens f args ... +@end defun + +@defmac modify* object lens +@defmacx modify* object lens rest ... +@end defmac + +@defmac set object lenses ... value +@end defmac + +@defmac get object lenses ... +@end defmac + + +@defun make-lens getter setter +@end defun + +@defmac build-lens getter setter +Where any of getter or setter can either be a single symbol, or a list. +@end defmac + +@deftp {Scheme Lens} identity-lens +@end deftp + +@defun compose-lenses lenses ... +@defunx lens-compose lenses ... +Lenses composes left to right, so earlier lenses in @var{lenses} are +applied earlier. +@end defun + +@deftp {Scheme Lens} ref idx +Focuses the element at index @var{idx} in a list. +@end deftp + +@deftp {Scheme Lens} car* +@deftp {Scheme Lens} cdr* +Focuses the first or second element of a pair. +@end deftp + +@defun each object lens proc +@end defun + |