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pt::util(n) Parser Tools pt::util(n) 





NAME


pt::util - General utilities






SYNOPSIS


package require Tcl 8.5


package require pt::ast ?1.1?


::pt::util error2readable error
  text


::pt::util error2position error
  text


::pt::util error2text error










DESCRIPTION


Are you lost ? Do you have trouble understanding this document ?
    In that case please read the overview provided by the Introduction to
    Parser Tools. This document is the entrypoint to the whole system the
    current package is a part of.


This package provides general utility commands.


This is a supporting package in the Core Layer of Parser
  Tools.


IMAGE: arch_core_support






API



  
::pt::util error2readable error text

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

  

  
::pt::util error2position error text

  
This command takes the structured form of a syntax error as thrown
      by parser runtimes and the input 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.

  
::pt::util error2text error

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








BUGS, IDEAS, FEEDBACK


This document, and the package it describes, will undoubtedly
    contain bugs and other problems. Please report such in the category
    pt of the Tcllib Trackers
    [http://core.tcl.tk/tcllib/reportlist]. Please also report any ideas for
    enhancements you may have for either package and/or documentation.


When proposing code changes, please provide unified diffs,
    i.e the output of diff -u.


Note further that attachments are strongly preferred over
    inlined patches. Attachments can be made by going to the Edit form of
    the ticket immediately after its creation, and then using the left-most
    button in the secondary navigation bar.






KEYWORDS


EBNF, LL(k), PEG, TDPL, context-free languages, expression,
    grammar, matching, parser, parsing expression, parsing expression grammar,
    push down automaton, recursive descent, state, top-down parsing languages,
    transducer






CATEGORY


Parsing and Grammars






COPYRIGHT


Copyright (c) 2009 Andreas Kupries <andreas_kupries@users.sourceforge.net>








  

    1.1
    tcllib