Re: Elegant design for creating error messages in LPEG parser

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Subject: Re: Elegant design for creating error messages in LPEG parser
From: Dirk Laurie <dirk.laurie@...>
Date: Mon, 8 Apr 2019 10:08:35 +0200

Cf is very specialized. Here is a toy example of how I understood it when I first learnt LPEG (string-to-number coercion was still OK then):

Cf(p,fct), p:Cf(fct) (Fold by Function)

fct must be a function of two variables. Think of it as a left-associative binary operator applied between the captures of p. The result is the capture of Cf(p,fct). (C(1)^3):match"361" returns '3','6','1' but Cf(C(1)^3,math.max):match"361" returns 6.

References:
- Elegant design for creating error messages in LPEG parser, joy mondal
- Re: Elegant design for creating error messages in LPEG parser, Hugo Musso Gualandi
- Re: Elegant design for creating error messages in LPEG parser, joy mondal
- Re: Elegant design for creating error messages in LPEG parser, Sean Conner
- Re: Elegant design for creating error messages in LPEG parser, joy mondal
- Re: Elegant design for creating error messages in LPEG parser, Sean Conner
- Re: Elegant design for creating error messages in LPEG parser, Soni "They/Them" L.
- Re: Elegant design for creating error messages in LPEG parser, joy mondal

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