05-05-2006
Quote:
Originally Posted by sendhilmani123
Hi,
The script works fine when there are no "|" symbols in the file. But even if one of them is present then it still says that the format is ok, which is not the exact way.
ie....
I have inputs like this.
Mani|123 prof
This kind of input also is accepted by the script. But it should not accept. It should accept only if all the three field are seperated by "|".
Thanks in advance
Does the awk statement work well ?
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LEARN ABOUT SUSE
dacceptor
grammar::fa::dacceptor(n) Finite automaton operations and usage grammar::fa::dacceptor(n)
__________________________________________________________________________________________________________________________________________________
NAME
grammar::fa::dacceptor - Create and use deterministic acceptors
SYNOPSIS
package require Tcl 8.4
package require snit
package require struct::set
package require grammar::fa::dacceptor ?0.1.1?
::grammar::fa::dacceptor daName fa ?-any any?
daName option ?arg arg ...?
daName destroy
daName accept? symbols
_________________________________________________________________
DESCRIPTION
This package provides a class for acceptors constructed from deterministic finite automatons (DFA). Acceptors are objects which can be
given a string of symbols and tell if the DFA they are constructed from would accept that string. For the actual creation of the DFAs the
acceptors are based on we have the packages grammar::fa and grammar::fa::op.
API
The package exports the API described here.
::grammar::fa::dacceptor daName fa ?-any any?
Creates a new deterministic acceptor with an associated global Tcl command whose name is daName. This command may be used to invoke
various operations on the acceptor. It has the following general form:
daName option ?arg arg ...?
Option and the args determine the exact behavior of the command. See section ACCEPTOR METHODS for more explanations.
The acceptor will be based on the deterministic finite automaton stored in the object fa. It will keep a copy of the relevant
data of the FA in its own storage, in a form easy to use for its purposes. This also means that changes made to the fa after
the construction of the acceptor will not influence the acceptor.
If any has been specified, then the acceptor will convert all symbols in the input which are unknown to the base FA to that
symbol before proceeding with the processing.
ACCEPTOR METHODS
All acceptors provide the following methods for their manipulation:
daName destroy
Destroys the automaton, including its storage space and associated command.
daName accept? symbols
Takes the list of symbols and checks if the FA the acceptor is based on would accept it. The result is a boolean value. True is
returned if the symbols are accepted, and False otherwise. Note that bogus symbols in the input are either translated to the any
symbol (if specified), or cause the acceptance test to simply fail. No errors will be thrown. The method will process only just that
prefix of the input which is enough to fully determine (non-)acceptance.
EXAMPLES
BUGS, IDEAS, FEEDBACK
This document, and the package it describes, will undoubtedly contain bugs and other problems. Please report such in the category gram-
mar_fa 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.
KEYWORDS
acceptance, acceptor, automaton, finite automaton, grammar, parsing, regular expression, regular grammar, regular languages, state, trans-
ducer
COPYRIGHT
Copyright (c) 2004 Andreas Kupries <andreas_kupries@users.sourceforge.net>
grammar_fa 0.1.1 grammar::fa::dacceptor(n)