[vset VERSION 1.1]
[comment {-*- text -*- doctools manpage}]
[manpage_begin pt::util n [vset VERSION]]
[include include/module.inc]
[titledesc {General utilities}]
[require pt::ast [opt [vset VERSION]]]
[description]
[include include/ref_intro.inc]

This package provides general utility commands.

[para]

This is a supporting package in the Core Layer of Parser Tools.
[para][image arch_core_support][para]

[section API]

[list_begin definitions]
[comment {= = == === ===== ======== ============= =====================}]
[call [cmd ::pt::util] [method error2readable] \
	[arg error] [arg text]]

This command takes the structured form of a syntax [arg error] as
thrown by parser runtimes and the input [arg text] to the parser which
caused that error and returns a string describing the error in a
human-readable form.

[para] The input [arg text] is required to convert the character
position of the error into a more readable line/column format, and to
provide excerpts of the input around the error position.

[comment {= = == === ===== ======== ============= =====================}]
[call [cmd ::pt::util] [method error2position] \
	[arg error] [arg text]]

This command takes the structured form of a syntax [arg error] as
thrown by parser runtimes and the input [arg text] to the parser which
caused that error and returns a 2-element list containing the line
number and column index for the error's character position in the
input, in this order.

[comment {= = == === ===== ======== ============= =====================}]
[call [cmd ::pt::util] [method error2text] [arg error]]

This command takes the structured form of a syntax [arg error] as
thrown by parser runtimes and returns a list of strings, each
describing a possible expected input in a human-readable form.

[comment {= = == === ===== ======== ============= =====================}]
[list_end]

[include include/feedback.inc]
[manpage_end]