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/**
* @author Titus Wormer
* @copyright 2015 Titus Wormer
* @license MIT
* @module remark:parse:tokenize:yaml
* @fileoverview Tokenise YAML.
*/
'use strict';
module.exports = yaml;
yaml.onlyAtStart = true;
var FENCE = '---';
var C_DASH = '-';
var C_NEWLINE = '\n';
/* Tokenise YAML. */
function yaml(eat, value, silent) {
var self = this;
var subvalue;
var content;
var index;
var length;
var character;
var queue;
if (
!self.options.yaml ||
value.charAt(0) !== C_DASH ||
value.charAt(1) !== C_DASH ||
value.charAt(2) !== C_DASH ||
value.charAt(3) !== C_NEWLINE
) {
return;
}
subvalue = FENCE + C_NEWLINE;
content = '';
queue = '';
index = 3;
length = value.length;
while (++index < length) {
character = value.charAt(index);
if (
character === C_DASH &&
(queue || !content) &&
value.charAt(index + 1) === C_DASH &&
value.charAt(index + 2) === C_DASH
) {
/* istanbul ignore if - never used (yet) */
if (silent) {
return true;
}
subvalue += queue + FENCE;
return eat(subvalue)({
type: 'yaml',
value: content
});
}
if (character === C_NEWLINE) {
queue += character;
} else {
subvalue += queue + character;
content += queue + character;
queue = '';
}
}
}
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