JSON::Tokenize(3)

NAME
JSON::Tokenize - tokenize a string containing JSON

SYNOPSIS
    use JSON::Tokenize ':all';
    my $input = '{"tuttie":["fruity", true, 100]}';
    my $token = tokenize_json ($input);
    print_tokens ($token, 0);

    sub print_tokens
    {
        my ($token, $depth) = @_;
        while ($token) {
            my $start = tokenize_start ($token);
            my $end = tokenize_end ($token);
            my $type = tokenize_type ($token);
            print "   " x $depth;
            my $value = substr ($input, $start, $end - $start);
            print ">>$value<< has type $type\n";
            my $child = tokenize_child ($token);
            if ($child) {
                print_tokens ($child, $depth+1);
            }
            my $next = tokenize_next ($token);
            $token = $next;
        }
    }

This outputs

    >>{"tuttie":["fruity", true, 100]}<< has type object
       >>"tuttie"<< has type string
       >>:<< has type colon
       >>["fruity", true, 100]<< has type array
          >>"fruity"<< has type string
          >>,<< has type comma
          >>true<< has type literal
          >>,<< has type comma
          >>100<< has type number

VERSION
This documents version 0.55 of JSON::Tokenize corresponding to git commit 739c1e12e85756c703242229caef685615ba77ca <https://github.com/benkasminbullock/JSON-Parse/commit/739c1e12e85756c703242229caef685615ba77ca> released on Tue Oct 24 07:11:47 2017 +0900.

DESCRIPTION
This is a module for tokenizing a JSON string. It breaks the string into individual tokens without creating any Perl structures. Thus it can be used for tasks such as picking out or searching through parts of a large JSON structure without storing each part of the entire structure as individual Perl variables in memory.

This module is an experimental part of JSON::Parse and its interface is likely to change. The tokenizing functions are currently written in a very primitive way.

FUNCTIONS

  tokenize_json
    my $token = tokenize_json ($json);

  tokenize_next
    my $next = tokenize_next ($token);

Walk the tree of tokens.

  tokenize_child
    my $child = tokenize_child ($child);

Walk the tree of tokens.

  tokenize_start
    my $start = tokenize_start ($token);

Get the start of the token as a byte offset from the start of the string. Note this is a byte offset not a character offset.

  tokenize_end
    my $end = tokenize_end ($token);

Get the end of the token as a byte offset from the start of the string. Note this is a byte offset not a character offset.

  tokenize_type
    my $type = tokenize_type ($token);

Get the type of the token as a string. The possible return values are

    "invalid",
    "initial state",
    "string",
    "number",
    "literal",
    "object",
    "array",
    "unicode escape"

  tokenize_text
    my $text = tokenize_text ($json, $token);

Given a token $token from this parsing and the JSON in $json, return the text which corresponds to the token. This is a convenience function written in Perl which uses "tokenize_start" and "tokenize_end" and "substr" to get the string from $json.

AUTHOR
Ben Bullock, <bkb@cpan.org>

COPYRIGHT & LICENCE
This package and associated files are copyright (C) 2016-2017 Ben Bullock.

You can use, copy, modify and redistribute this package and associated files under the Perl Artistic Licence or the GNU General Public Licence.