Summary

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	File:     expander.icn

	Subject:  Procedures to convert character pattern expressions

	Author:   Ralph E. Griswold

	Date:     May 2, 2001

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  This file is in the public domain.

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  pfl2str(pattern) expands pattern-form expressions, which have the form

	[<expr><op><expr>]

  to the corresponding string.

  The value of <op> determines the operation to be performed.

  pfl2gxp(pattern) expands pattern-form expressions into generators
  that, when compiled and evaluated, produce the corresponding
  string.

  pfl2pwl(pattern) converts pattern-form expressions to Painter's
  weaving language.

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  Links:  strings, weaving

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This file is part of the (main) package.

error(expr1, expr2)

form1(wexpr, op)

form2(wexpr1, op, wexpr2)

galt(s)

lit(s)

pfl2gxp(pattern, arg)

: pattern form to generating expression

pfl2pwl(pattern)

: pattern form to Painter expression

pfl2str(pattern)

: pattern-form to plain string

prepare(wexpr)

 preprocess pwl

pwl2pfl(wexpr)

: Painter expression to pattern form

pwlcvt(wexpr)

spray(inter)

str(s)