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Paweł Nowak 2014-12-12 22:59:57 +01:00
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@ -5,8 +5,9 @@ description:
"syntax" allows you to write a single syntax description and instantiate is both as a parser and a pretty printer.
.
Syntax descriptions are written in applicative or arrow style. The library uses a custom typeclass hierarchy, provided
by the "semi-iso" package. Most of the time you will be using operators like '/$/' and '/*/', just like parser combinators.
When more power is needed - e.g. when the syntax depends on the parsed or printed value - you turn to arrows.
by the "semi-iso" package. Most of the time you will be using operators like '/$/', '/*/' and '/+/' (= '<|>'), just
like parser combinators. When more power is needed - e.g. when the syntax depends on the parsed or printed value -
you turn to arrows.
.
Semi-isomorphisms from "semi-iso" are the basic building block of syntax descriptions. I recommend reading
the hackage page of "semi-iso" first, as it contains much more information.