Thank you, I'll try to keep that present (2 & null) after reviewing current code.
What is this RHS you are refering to please?
Uhm, not really on the possible error topic - as I experienced it differently.
....
Phew... i still had that in the terminal so I could scroll to it...
This is with code of the 'initial' post/s ; where the 'catch' was different from the code we're talking about now (recent post with code).
This 'symbol' cannot be compared to a number, thus creating an 'expected' error message, which I wanted to get rid of -> as it breaks the visual experience.
Could you advice a better handling for this situation?
-> Catching arrow keys without showing the enduser an error message? <-
We have requirments to not allow a userid login abilities but allow users to 'su' to it. In solaris I normally set the shell in /etc/passwd to bin/false. THis does not work on Linux, any suggestions would help. (1 Reply)
i want to delete every newline and every line which starts with "RECORD......." in a file.
FILE:
Record 61391 in base BROCKHAUS (Timestamp: 2008-04-09 11:38:38)
UNTERTITEL :
Gräfin (seit 1707 Reichsgräfin) von, * Schwerin 4. 2. 1686, + Berlin
21. 10. 1744; wurde
Record 61392 in base BROCKHAUS... (4 Replies)
Hi,
I'm new to UNIX and am trying to learn shell scripting in order to work on an interface that I inherited when a co-worker left. I need to be able to check to see whether a file exists to determine whether the FTP has taken place, but in testing, the if statement always evaluates as false,... (3 Replies)
Hi All,
I am using the below Script to enter a line in the File:
#!/bin/ksh
# To delete the last line if it contains the pattern Redirect permanent / Virgin Atlantic Airways - Popup
echo "Enter the URL that should point to the particular microsite"
read url
# To delete the last line if it... (0 Replies)
Why this happens?
How to solve this?
$netstat -na |grep 9325
tcp 0 0 127.0.0.1:9325 127.0.0.1:9325 ESTABLISHED
When a client socket repeatedly tries to connect to an inactive(no server socket is listening on this port) local port,connect succeeds.
... (1 Reply)
Checking configuration access files for an AIX server, left me wondering about this :confused::
If a user is added to system group, it gets gid=0 with some security risks because it gets some root kind of file access level.
Is this insecure condition kept if the user has admin variable... (0 Replies)
I have read the below from the book bash cookbook.Tail +1 filenames is similar to cat filename
I have tried the same in Ubuntu 11.10 with bash. 4.0 .
I have received error for the Same.
May I know in which system that will work fine ?
Thanks (1 Reply)
Hi
I have written a script to send email alerts when load of my linux server reaches max point
I keep getting false emails thought the load is normal , looks like same email is generated again and again - called from cron tab
checked if the tempfile is present , no it is not , cleaned... (22 Replies)
Discussion started by: anil529
22 Replies
LEARN ABOUT MOJAVE
page_util_peg
page_util_peg(n) Parser generator tools page_util_peg(n)
__________________________________________________________________________________________________________________________________________________NAME
page_util_peg - page PEG transformation utilities
SYNOPSIS
package require page::util::peg ?0.1?
package require snit
::page::util::peg::symbolNodeOf tree node
::page::util::peg::symbolOf tree node
::page::util::peg::updateUndefinedDueRemoval tree
::page::util::peg::flatten treequery tree
::page::util::peg::getWarnings tree
::page::util::peg::printWarnings msg
::page::util::peg::peOf tree eroot
::page::util::peg::printTclExpr pe
_________________________________________________________________DESCRIPTION
This package provides a few common operations to PEG transformations. They assume a Normalized PE Grammar Tree as input, see the package
page::util::norm::peg, possibly augmented with attributes coming from transformations not in conflict with the base definition.
API
::page::util::peg::symbolNodeOf tree node
Given an arbitrary expression node in the AST tree it determines the node (itself or an ancestor) containing the name of the nonter-
minal symbol the node belongs to, and returns its id. The result is either the root of the tree (for the start expression), or a
definition node.
::page::util::peg::symbolOf tree node
As ::page::util::peg::symbolNodeOf, but returns the symbol name instead of the node.
::page::util::peg::updateUndefinedDueRemoval tree
The removal of nodes in the AST tree can cause symbols to lose one or more users.
A used by B and C,
B is reachable,
C is not,
so A now loses the node in the expression for C calling it,
or rather, not calling it anymore.
This command updates the cross-references and which nonterminals are now undefined.
::page::util::peg::flatten treequery tree
This commands flattens nested sequence and choice operators in the AST tree, re-using the treeql object treequery to run the query
determining which nodes to cut.
::page::util::peg::getWarnings tree
This command looks at the attributes of the AST tree for problems with the grammar and issues warnings. They do not prevent us from
writing the grammar, but still represent problems with it the user should be made aware of.
The result of the command is a dictionary mapping nonterminal names to their associated warnings.
::page::util::peg::printWarnings msg
The argument of the command is a dictionary mapping nonterminal names to their associated warnings, as generated by, for example,
the command ::page::util::peg::getWarnings.
The warnings contained therein are formatted and then printed via the log command page_info. This means that this command can be
used only from within a plugin managed by the package page::pluginmgr.
::page::util::peg::peOf tree eroot
This command converts the parsing expression starting at the node eroot in the AST tree into a nested list. The exact syntax of this
list specified by the package grammar::peg.
::page::util::peg::printTclExpr pe
This command converts the parsing expression contained in the nested list pe into a Tcl string which can be placed into a Tcl
script. See the package grammar::peg for the exact syntax of pe.
BUGS, IDEAS, FEEDBACK
This document, will undoubtedly contain bugs and other problems. Please report such in the category page of the Tcllib SF Trackers
[http://sourceforge.net/tracker/?group_id=12883]. Please also report any ideas for enhancements you may have.
KEYWORDS
PEG, page, parser generator, parsing expression grammar, text processing, transformation
CATEGORY
Page Parser Generator
COPYRIGHT
Copyright (c) 2007 Andreas Kupries <andreas_kupries@users.sourceforge.net>
page 1.0 page_util_peg(n)