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Softpanorama Perl Bulletin, 2005

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This is a very limited coverage of old Perl news. For a better source of Perl news for 2005 please check  Perl.com

[Jul 15, 2005] perl.com Ten Essential Development Practices

The following ten tips come from Perl Best Practices, a new book of Perl coding and development guidelines by Damian Conway.

[Jul 1, 2005] Perl 5.8 Documentation - BXref - Generates cross reference reports for Perl programs

The B::Xref module is used to generate a cross reference listing of all definitions and uses of variables, subroutines and formats in a Perl program. It is implemented as a backend for the Perl compiler.

The report generated is in the following format: 

File filename1 Subroutine subname1 Package package1 object1 line numbers object2 line numbers ... Package package2 ...

Each File section reports on a single file. Each Subroutine section reports on a single subroutine apart from the special cases "(definitions)" and "(main)". These report, respectively, on subroutine definitions found by the initial symbol table walk and on the main part of the program or module external to all subroutines.

The report is then grouped by the Package of each variable, subroutine or format with the special case "(lexicals)" meaning lexical variables. Each object name (implicitly qualified by its containing Package) includes its type character(s) at the beginning where possible. Lexical variables are easier to track and even included dereferencing information where possible.

The line numbers are a comma separated list of line numbers (some preceded by code letters) where that object is used in some way. Simple uses aren't preceded by a code letter. Introductions (such as where a lexical is first defined with my) are indicated with the letter "i". Subroutine and method calls are indicated by the character "&". Subroutine definitions are indicated by "s" and format definitions by "f".

Option words are separated by commas (not whitespace) and follow the usual conventions of compiler backend options.

-oFILENAME

Directs output to FILENAME instead of standard output.

-r

Raw output. Instead of producing a human-readable report, outputs a line in machine-readable form for each definition/use of a variable/sub/format.

-d

Don't output the "(definitions)" sections.

-D[tO]

(Internal) debug options, probably only useful if -r included. The t option prints the objl&

This software is written in Delphi 5 Object Pascal and Perl and it is OpenSource, distributed under Mozilla Public Licence 1.1 and hosted by SourceForge.

Please visit our project page to get further information.

Now, take a look at some screenshots, read the User Manual to get a more detailed description of Open Perl IDE or download the latest release (Version 1.0).

The new release 1.0 is the first non-beta version of Open Perl IDE and fixes most of the bugs reported for previous releases. However, some of the changes are much more than simple bugfixes:

• Better syntax coloring by using a new highlighter component.
• Important debugger improvements, including better support for huge arrays.
• Previous instance detection on program start.
• Several minor HelpViewer and Configuration enhancements.

For any information, questions, remarks or bug reports, please send a message to Jürgen Güntherodt.

[Jan 2, 2005] ExecPerl - Utilities for executing perl scripts vim online

Provides the following commands:

:ExecPerl script_name
This will execute script_name using the perl
interpreter.

:ExecPerlMore
This will execute script_name using the perl
interpreter.  If the output would scroll past the end
of the screen, execution pauses and waits for a
keystroke before continuing.

:ExecPerlDump
This will ask you for an output file and then
execute script_name using the perl interpreter.  The
output from the script is dumped to the file that you
entered when you were prompted.  You may press enter
instead of entering a file name to accept the default
filename.

Also, The following keys are mapped by default.  You'll have to
comment them if you don't want this behavior:

<F5>:    ExecPerl the current file being edited
<C-F5>:  ExecPerlMore the current file being edited
<S-F5>:  ExecPerlDump the current file being edited
 

[Jan 2, 2005]  perl_synwrite.vim - checks Perl syntax before allowing file write vim online

This plugin causes write attempts to fail if the contents of the buffer produce an error when run through "perl -c" The plugin uses can use autocommands for the BufWriteCmd and FileWriteCmd events, but by default only provides a :Write command to check-then-write.

install details

Put this file in one of the locations described in :help ftplugin such as "~/.vim/after/ftplugin";  if you want autocommands, which are quirky, define perl_synwrite_au = 1

[Jan 2, 2005] perl.vim - Perl compiler script vim online

This is compiler script that runs perl -Wc and parses all error and warnings. For more information how to use compilers in VIM read help. This version has workaround with redirecting stderr on windows platform so it can run either on unixes or windows. Enjoy. Lukas

install details

Just put in the $VIMRUNTIME/compiler directory and run :make.