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- Current State of Exceptions in Rakudo and Perl 6
- Meet DBIish, a Perl 6 Database Interface
- doc.perl6.org and p6doc
- Exceptions Grant Report for May 2012
- Exceptions Grant Report -- Final update
- Perl 6 Hackathon in Oslo: Be Prepared!
- Localization for Exception Messages
- News in the Rakudo 2012.05 release
- News in the Rakudo 2012.06 release
- Perl 6 Hackathon in Oslo: Report From The First Day
- Perl 6 Hackathon in Oslo: Report From The Second Day
- Quo Vadis Perl?
- Rakudo Hack: Dynamic Export Lists
- SQLite support for DBIish
- Stop The Rewrites!
- Upcoming Perl 6 Hackathon in Oslo, Norway
- Pattern Matching and Unpacking
- Rakudo's Abstract Syntax Tree
- The REPL trick
- A shiny perl6.org site
- Creating an entry point for newcomers
- An offer for software developers: free IRC logging
- Announcing try.rakudo.org, an interactive Perl 6 shell in your browser
- Another perl6.org iteration
- Blackjack and Perl 6
- Why I commit Crud to the Perl 6 Test Suite
- This Week's Contribution to Perl 6 Week 5: Implement Str.trans
- This Week's Contribution to Perl 6
- This Week's Contribution to Perl 6 Week 8: Implement $*ARGFILES for Rakudo
- This Week's Contribution to Perl 6 Week 6: Improve Book markup
- This Week's Contribution to Perl 6 Week 2: Fix up a test
- This Week's Contribution to Perl 6 Week 9: Implement Hash.pick for Rakudo
- This Week's Contribution to Perl 6 Week 11: Improve an error message for Hyper Operators
- This Week's Contribution to Perl 6 - Lottery Intermission
- This Week's Contribution to Perl 6 Week 3: Write supporting code for the MAIN sub
- This Week's Contribution to Perl 6 Week 1: A website for proto
- This Week's Contribution to Perl 6 Week 4: Implement :samecase for .subst
- This Week's Contribution to Perl 6 Week 10: Implement samespace for Rakudo
- This Week's Contribution to Perl 6 Week 7: Implement try.rakudo.org
- What is the "Cool" class in Perl 6?
- Report from the Perl 6 Hackathon in Copenhagen
- Custom operators in Rakudo
- A Perl 6 Date Module
- Defined Behaviour with Undefined Values
- Dissecting the "Starry obfu"
- The case for distributed version control systems
- Perl 6: Failing Softly with Unthrown Exceptions
- Perl 6 Compiler Feature Matrix
- The first Perl 6 module on CPAN
- A Foray into Perl 5 land
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- First Grant Report: Structured Error Messages
- Second Grant Report: Structured Error Messages
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- How core is core?
- How fast is Rakudo's "nom" branch?
- Building a Huffman Tree With Rakudo
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- Mini-Challenge: Write Your Prisoner's Dilemma Strategy
- Longest Palindrome by Regex
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- Lots of momentum in the Perl 6 community
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- My first YAPC - YAPC::EU 2010 in Pisa
- Trying to implement new operators - failed
- Programming Languages Are Not Zero Sum
- Perl 6 notes from February 2011
- Notes from the YAPC::EU 2010 Rakudo hackathon
- Let's build an object
- Perl 6 is optimized for fun
- How to get a parse tree for a Perl 6 Program
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- Results from the Prisoner's Dilemma Challenge
- Protected Attributes Make No Sense
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- PVC - Perl 6 Vocabulary Coach
- Fixing Rakudo Memory Leaks
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- Rakudo "star" announced
- My personal "I want a PONIE" wish list for Rakudo Star
- Rakudo's rough edges
- Rats and other pets
- The Real World Strikes Back - or why you shouldn't forbid stuff just because you think it's wrong
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- Set Phasers to Stun!
- Starry Perl 6 obfu
- Recent Perl 6 Developments August 2008
- The State of Regex Modifiers in Rakudo
- Strings and Buffers
- Subroutines vs. Methods - Differences and Commonalities
- A SVG plotting adventure
- A Syntax Highlighter for Perl 6
- Test Suite Reorganization: How to move tests
- The Happiness of Design Convergence
- Thoughts on masak's Perl 6 Coding Contest
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- When we reach 100% we did something wrong
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- Why Rakudo needs NQP
- Why was the Perl 6 Advent Calendar such a Success?
- What you can write in Perl 6 today
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- You are good enough!
Sun, 03 May 2009
Rakudo's rough edges
The Rakudo developers know about these, but by shedding a light on these edges I hope that I motivate people to work on them, as well as giving fellow Rakudo users the feeling that they are not alone with their woes.
Here they are:
- Missing line numbers in error messages
- Can't initialize attributes in BUILD methods
The first one is pretty obvious: While parse errors show a line number in the error message, other compile time errors and parse errors don't. When debugging a larger application that's really a pain. I've been told that this is very close to being implemented, and maybe it is at the time I get this blog post published, so here is hope.
If you've only toyed around with Rakudo a bit, you might not have hit the
second item on my list. Perl 6 has a rather sophisticated object model, and
Rakudo implements large parts of it. But in larger applications it still feels
a bit hacky because you can't use the
BUILD submethod to set up
attributes, it dies with a
Null PMC access. Therefore one has to
revert to custom init methods, and is always in danger of forgetting to call
Performance again is very obvious: Rakudo has a startup time of nearly a second, and both execution and compilation is very slow. Thanks to module precompilation it is somewhat manageable in bigger projects, but it's still something that needs improvement. Thankfully Allison Randal is reworking the calling conventions in Parrot, and we can hope for some speedup there.
There are other things that could use some polishing, but which seem of somewhat lower priority to me:
- Syntax errors could be more specific.
- The error
say requires an argumentshould only appear for an otherwise syntactically correct statement, not if there's a syntax error later in the code - it is rather misleading in that case.
- When the user lets his program
die(), parrot's stack trace should not be shown - if a stack trace is desirable, then one showing only Perl 6 routines.
- A mechanism for controlling warnings would be very welcome.
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