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Today's Topics:
1. Parsec and Parsing (mike h)
----------------------------------------------------------------------
Message: 1
Date: Mon, 18 Apr 2016 08:35:19 +0000 (UTC)
From: mike h <mike_k_hough...@yahoo.co.uk>
To: The Haskell-Beginners Mailing List - Discussion of Primarily
Beginner-level Topics Related To Haskell <beginners@haskell.org>
Subject: [Haskell-beginners] Parsec and Parsing
Message-ID:
<1492553946.3587393.1460968519503.javamail.ya...@mail.yahoo.com>
Content-Type: text/plain; charset="utf-8"
Hi,
I have two types,
Tag = String
Val = String
and I want to creat expressions based on equality,? t = v? (where t is Tag, v
is Val)
and containment ie
t IN v1, v2, v3, v4
ie a tag equals a value or a tag is contained in a list of values.
Furthyermore I would like to apply AND and OR, i.e.
(t1 = v OR t1 IN v1, v2, v3) AND (t2 = v2) ect etc
I want to use Parsec and I'm ok with basic combinators but I want to get as far
as making this a simple DSL but I don't want to
use buildExpressionParser? - at least not initially. I want to do this from
first principles, understand what I'm doing and then maybe use
buildExpressionParser.
Any help would be really appreciated.
Thanks
Mike
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