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rOACCT/node_modules/micromark/lib/tokenize/factory-label.js
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factory-label.js
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			'use strict'

			var assert = require('assert')
			var codes = require('../character/codes.js')
			var markdownLineEnding = require('../character/markdown-line-ending.js')
			var markdownSpace = require('../character/markdown-space.js')
			var constants = require('../constant/constants.js')
			var types = require('../constant/types.js')

			function _interopDefaultLegacy(e) {
			return e && typeof e === 'object' && 'default' in e ? e : {default: e}
			}

			var assert__default = /#__PURE__/ _interopDefaultLegacy(assert)

			// eslint-disable-next-line max-params
			function labelFactory(effects, ok, nok, type, markerType, stringType) {
			var self = this
			var size = 0
			var data

			return start

			function start(code) {
			assert__default['default'](code === codes.leftSquareBracket, 'expected `[`')
			effects.enter(type)
			effects.enter(markerType)
			effects.consume(code)
			effects.exit(markerType)
			effects.enter(stringType)
			return atBreak
			}

			function atBreak(code) {
			if (
			code === codes.eof \|\|
			code === codes.leftSquareBracket \|\|
			(code === codes.rightSquareBracket && !data) \|\|
			/* c8 ignore next */
			(code === codes.caret &&
			/* c8 ignore next */
			!size &&
			/* c8 ignore next */
			'_hiddenFootnoteSupport' in self.parser.constructs) \|\|
			size > constants.linkReferenceSizeMax
			) {
			return nok(code)
			}

			if (code === codes.rightSquareBracket) {
			effects.exit(stringType)
			effects.enter(markerType)
			effects.consume(code)
			effects.exit(markerType)
			effects.exit(type)
			return ok
			}

			if (markdownLineEnding(code)) {
			effects.enter(types.lineEnding)
			effects.consume(code)
			effects.exit(types.lineEnding)
			return atBreak
			}

			effects.enter(types.chunkString, {contentType: constants.contentTypeString})
			return label(code)
			}

			function label(code) {
			if (
			code === codes.eof \|\|
			code === codes.leftSquareBracket \|\|
			code === codes.rightSquareBracket \|\|
			markdownLineEnding(code) \|\|
			size++ > constants.linkReferenceSizeMax
			) {
			effects.exit(types.chunkString)
			return atBreak(code)
			}

			effects.consume(code)
			data = data \|\| !markdownSpace(code)
			return code === codes.backslash ? labelEscape : label
			}

			function labelEscape(code) {
			if (
			code === codes.leftSquareBracket \|\|
			code === codes.backslash \|\|
			code === codes.rightSquareBracket
			) {
			effects.consume(code)
			size++
			return label
			}

			return label(code)
			}
			}

			module.exports = labelFactory