Re: magic/absurd bash interpreter/compiler ?

"Jonathan Thornburg" <jthorn@astro.indiana.edu>
24 Dec 2012 03:57:39 GMT

          From comp.compilers
Related articles
magic/absurd bash interpreter/compiler ? Avoid9Pdf@gmail.com (2012-12-23)
Re: magic/absurd bash interpreter/compiler ? miller@yoyo.ORG (J G Miller) (2012-12-24)
Re: magic/absurd bash interpreter/compiler ? jthorn@astro.indiana.edu (Jonathan Thornburg) (2012-12-24)
Re: magic/absurd bash interpreter/compiler ? eric@deptj.eu (Eric) (2012-12-24)
Re: magic/absurd bash interpreter/compiler ? barmar@alum.mit.edu (Barry Margolin) (2012-12-24)
Re: magic/absurd bash interpreter/compiler ? gah@ugcs.caltech.edu (glen herrmannsfeldt) (2012-12-25)
Re: magic/absurd bash interpreter/compiler ? eric@deptj.eu (Eric) (2012-12-26)
Re: magic/absurd bash interpreter/compiler ? gah@ugcs.caltech.edu (glen herrmannsfeldt) (2012-12-28)
Re: magic/absurd bash interpreter/compiler ? barmar@alum.mit.edu (Barry Margolin) (2012-12-28)
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From: "Jonathan Thornburg" <jthorn@astro.indiana.edu>
Newsgroups: comp.compilers,comp.unix.shell,comp.os.linux.misc
Date: 24 Dec 2012 03:57:39 GMT
Organization: Compilers Central
References: 12-12-014
Keywords: design
Posted-Date: 24 Dec 2012 00:09:16 EST

In comp.compilers Avoid9Pdf@gmail.com wrote:
> But this bash nonsense is infuriating me! We
> need a rigorous/formal syntax for computing.
[[...]]
> Does this thing use multiple passes. Eg. where the complete command-line
> is FIRST analysed for "<", ">", and then LATER any function/s who's input
> and/or output is not specified, can use the previous scan's stuff.


If you want a shell with a well-defined formal structure, you might
find rc of interest. It uses a YACC (i.e., LALR(1)) parser. As usual,
Wikipedia has a reasonable intro with links to more information:
http://en.wikipedia.org/wiki/Rc


--
-- "Jonathan Thornburg [remove -animal to reply]" <jthorn@astro.indiana-zebra.edu>
      Dept of Astronomy, Indiana University, Bloomington, Indiana, USA
      "C++ is to programming as sex is to reproduction. Better ways might
        technically exist but they're not nearly as much fun." -- Nikolai Irgens


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