Re: Has anyone hand-written a scanner/parser module?

Jeremy Bennett <jeremy.bennett@embecosm.com>
Sun, 16 Nov 2008 04:06:33 -0600

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From: Jeremy Bennett <jeremy.bennett@embecosm.com>
Newsgroups: comp.compilers
Date: Sun, 16 Nov 2008 04:06:33 -0600
Organization: Compilers Central
References: 08-11-061
Keywords: lex, parse, practice
Posted-Date: 16 Nov 2008 17:52:40 EST

On Sat, 15 Nov 2008 09:49:38 -0800, tuxisthebirdforme@gmail.com wrote:


> I know most people anymore use lex/yacc or some derivative of these
> tools to create scanner/parser modules for their compiler projects. I
> was wondering if anyone has developed a scanner or parser that they
> personally hand-wrote? ...


It's old, but take a look at "BCPL: The Language and its Compiler" by
Martin Richards and Colin Whitby-Strevens. It includes the listing and
description for the BCPL compiler front end (in BCPL of course). It's an
example of a hand-written recursive descent compiler with precedence
parsing for expressions.


I believe that makes it a parser for LL(1) language with LR(1)
expressions.


HTH,




Jeremy


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