Comments on: Eeck more Ruby parser crapola! http://brian.pontarelli.com/2006/08/06/eeck-more-ruby-parser-crapola/ Brian Pontarelli Wed, 08 Feb 2012 15:34:20 +0000 hourly 1 http://wordpress.org/?v=3.0.4 By: Matijs van Zuijlen http://brian.pontarelli.com/2006/08/06/eeck-more-ruby-parser-crapola/#comment-3853 Matijs van Zuijlen Mon, 25 Jun 2007 13:07:42 +0000 http://brian.pontarelli.com/2006/08/06/eeck-more-ruby-parser-crapola/#comment-3853 It's very simple: class and method definition are run-time operations, not compile-time. Ruby does parse the whole file, as you can see if you put some real syntax errors later in the file (like a = + ] ). Having class and method definition run-time means you can also redefine methods (and even undefine classes) at run-time. This means that 'fixing' your problem would be very hard: If there are two definitions for create_dictionary, which one should Ruby use at that point in the code? It’s very simple: class and method definition are run-time operations, not compile-time. Ruby does parse the whole file, as you can see if you put some real syntax errors later in the file (like a = + ] ).

Having class and method definition run-time means you can also redefine methods (and even undefine classes) at run-time. This means that ‘fixing’ your problem would be very hard: If there are two definitions for create_dictionary, which one should Ruby use at that point in the code?

]]> By: Brian Pontarelli http://brian.pontarelli.com/2006/08/06/eeck-more-ruby-parser-crapola/#comment-1454 Brian Pontarelli Wed, 08 Nov 2006 15:07:33 +0000 http://brian.pontarelli.com/2006/08/06/eeck-more-ruby-parser-crapola/#comment-1454 Yeah, you are completely correct and it gets much, much worse! I'll be posting again about this Ruby parsing stuff, but reflection in Ruby is such a mess because it doesn't build up an AST completely. Yeah, you are completely correct and it gets much, much worse! I’ll be posting again about this Ruby parsing stuff, but reflection in Ruby is such a mess because it doesn’t build up an AST completely.

]]> By: Mike McKinney http://brian.pontarelli.com/2006/08/06/eeck-more-ruby-parser-crapola/#comment-1439 Mike McKinney Tue, 07 Nov 2006 19:01:03 +0000 http://brian.pontarelli.com/2006/08/06/eeck-more-ruby-parser-crapola/#comment-1439 Lots of scripting languages are read then loaded in line... this is what is happening here, the interpreter doesn't have reference to the method you are defining until the 'end' tag so trying to define something in that space will always blow up... (unless someone wants to have a multi-pass compiler which are a bear.) Lots of scripting languages are read then loaded in line… this is what is happening here, the interpreter doesn’t have reference to the method you are defining until the ‘end’ tag so trying to define something in that space will always blow up… (unless someone wants to have a multi-pass compiler which are a bear.)

]]> By: Beniji http://brian.pontarelli.com/2006/08/06/eeck-more-ruby-parser-crapola/#comment-784 Beniji Wed, 04 Oct 2006 12:36:43 +0000 http://brian.pontarelli.com/2006/08/06/eeck-more-ruby-parser-crapola/#comment-784 Well Ruby is an object scripting language. The emphasis is on scripting. Hence also the lame require/load and lack of decent module namespacing. Matz just needs to take some pointers from guido/joy on this one. Well Ruby is an object scripting language. The emphasis is on scripting. Hence also the lame require/load and lack of decent module namespacing. Matz just needs to take some pointers from guido/joy on this one.

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