Groups > comp.lang.java.programmer > #28321

Re: Parser

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From	Simon Lewis <simonlewis2001@gmail.com>
Newsgroups	comp.lang.java.programmer
Subject	Re: Parser
Date	Wed, 30 Apr 2014 15:13:54 +0200
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Roedy Green <see_website@mindprod.com.invalid> writes:

> On Mon, 28 Apr 2014 11:30:45 +0200, Silvio <silvio@internet.com>
> wrote, quoted or indirectly quoted someone who said :
>
>>
>>The fact that a no such keywords exist does not make parsing slower by 
>>definition. In the Java case it unlikely that such keywords would make 
>>parsing faster. The language grammar defines how fast a parser can be. 
>>Although the Java grammar is not strictly LALR(x) Java can be parsed 
>>pretty left-to-right with the use of some simple tweaks and assumptions 
>>to prevent expensive things like backtracking
>
> Consider how far you have to parse into definition to tell if you have
> a variable or a method definition.
>
> An IDE could insert visible markers to mark the begins and end of
> things. I must waste at least an hour a day trying to figure out which
> { } balances with what.  It is not a task my eyes can do, especially
> when the other half is offscreen.

Huh? Use expand/collapse then in any good editor. Its easy. Especially
with colour hiliting parenthesis matching.

>
> Another solution would be a SCID which would not let you cut/copy
> paste an unbalanced block of code.  You would think of program as
> composed on units -- like plumbing, not a stream of characters.

You mean like all programmers already do? And pretty much all editors
treat them?

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Thread

Parser Roedy Green <see_website@mindprod.com.invalid> - 2014-04-27 15:46 -0700
  [LONG POST] Re: Parser Jeff Higgins <jeff@invalid.invalid> - 2014-04-27 19:59 -0400
    Re: [LONG POST] Re: Parser Jeff Higgins <jeff@invalid.invalid> - 2014-04-27 20:00 -0400
    Re: [LONG POST] Re: Parser Roedy Green <see_website@mindprod.com.invalid> - 2014-04-28 02:09 -0700
  Re: Parser Silvio <silvio@internet.com> - 2014-04-28 11:30 +0200
    Re: Parser Roedy Green <see_website@mindprod.com.invalid> - 2014-04-29 13:15 -0700
      Re: Parser Joerg Meier <joergmmeier@arcor.de> - 2014-04-29 22:55 +0200
        Re: Parser Andreas Leitgeb <avl@auth.logic.tuwien.ac.at> - 2014-05-05 08:13 +0000
      Re: Parser Jeff Higgins <jeff@invalid.invalid> - 2014-04-29 18:28 -0400
        Re: Parser Jeff Higgins <jeff@invalid.invalid> - 2014-04-29 18:35 -0400
      Re: Parser Joshua Cranmer 🐧 <Pidgeot18@verizon.invalid> - 2014-04-29 17:31 -0500
      Re: Parser Simon Lewis <simonlewis2001@gmail.com> - 2014-04-30 15:13 +0200

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