trusty (3) lambda.3tcl.gz

Provided by: tcllib_1.15-dfsg-2_all bug

NAME
       lambda - Utility commands for anonymous procedures


SYNOPSIS
       package require Tcl  8.5

       package require lambda  ?1?

       ::lambda arguments body ?arg...?

       ::lambda@ namespace arguments body ?arg...?

_________________________________________________________________


DESCRIPTION
       This  package provides two convenience commands to make the writing of anonymous procedures, i.e. lambdas
       more proc-like. Instead of, for example, to write
              set f {::apply {{x} {
              }}}
       with its deep nesting of braces, or
              set f [list ::apply {{x y} {
              }} $value_for_x]
       with a list command to insert some of the arguments of a partial application, just write
              set f [lambda {x} {
              }]
       and
              set f [lambda {x y} {
              } $value_for_x]


COMMANDS
       ::lambda arguments body ?arg...?
              The command constructs an anonymous  procedure  from  the  list  of  arguments,  body  script  and
              (optional)  predefined  argument  values  and returns a command prefix representing this anonymous
              procedure.

              When invoked the body is run in a new procedure scope just underneath the global scope,  with  the
              arguments set to the values supplied at both construction and invokation time.

       ::lambda@ namespace arguments body ?arg...?
              The  command  constructs  an  anonymous procedure from the namespace name, list of arguments, body
              script and (optional) predefined argument values and returns a command  prefix  representing  this
              anonymous procedure.

              When  invoked the body is run in a new procedure scope in the namespace, with the arguments set to
              the values supplied at both construction and invokation time.


AUTHORS
       Andreas Kupries


BUGS, IDEAS, FEEDBACK
       This document, and the package it describes, will undoubtedly contain bugs and  other  problems.   Please
       report      such      in      the      category      lambda     of     the     Tcllib     SF     Trackers
       [http://sourceforge.net/tracker/?group_id=12883].  Please also report any ideas for enhancements you  may
       have for either package and/or documentation.


SEE ALSO
       apply(3tcl), proc(3tcl)


KEYWORDS
       anonymous procedure, callback, command prefix, currying, lambda, partial application, proc


CATEGORY
       Utility


       Copyright (c) 2011 Andreas Kupries, BSD licensed