File:  [gforth] / gforth / parsedto.fs
Revision 1.1: download - view: text, annotated - select for diffs
Wed Jun 27 21:26:51 2012 UTC (5 years, 3 months ago) by pazsan
Branches: MAIN
CVS tags: HEAD
Added parsed to

\ -> (to/is replacement) recognizer

\ Copyright (C) 2012 Free Software Foundation, Inc.

\ This file is part of Gforth.

\ Gforth is free software; you can redistribute it and/or
\ modify it under the terms of the GNU General Public License
\ as published by the Free Software Foundation, either version 3
\ of the License, or (at your option) any later version.

\ This program is distributed in the hope that it will be useful,
\ but WITHOUT ANY WARRANTY; without even the implied warranty of
\ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
\ GNU General Public License for more details.

\ You should have received a copy of the GNU General Public License
\ along with this program. If not, see http://www.gnu.org/licenses/.

' (int-to) ' (comp-to) ' lit, recognizer: r:to

: to-recognizer ( addr u -- xt r:to | addr u r:fail )
    2dup s" ->" string-prefix?  0= IF  r:fail  EXIT  THEN
    2dup 2 /string dup 0= IF  2drop r:fail  EXIT  THEN
    find-name dup 0= IF  drop r:fail  EXIT  THEN
    name>comp drop nip nip r:to ;

' to-recognizer
forth-recognizer get-recognizers
1+ forth-recognizer set-recognizers

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