67 lines
1.4 KiB
JavaScript
67 lines
1.4 KiB
JavaScript
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/**
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* @typedef {import('micromark-util-types').Construct} Construct
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* @typedef {import('micromark-util-types').State} State
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* @typedef {import('micromark-util-types').TokenizeContext} TokenizeContext
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* @typedef {import('micromark-util-types').Tokenizer} Tokenizer
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*/
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import {asciiPunctuation} from 'micromark-util-character'
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import {codes, types} from 'micromark-util-symbol'
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import {ok as assert} from 'devlop'
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/** @type {Construct} */
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export const characterEscape = {
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name: 'characterEscape',
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tokenize: tokenizeCharacterEscape
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}
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/**
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* @this {TokenizeContext}
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* @type {Tokenizer}
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*/
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function tokenizeCharacterEscape(effects, ok, nok) {
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return start
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/**
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* Start of character escape.
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*
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* ```markdown
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* > | a\*b
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* ^
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* ```
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*
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* @type {State}
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*/
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function start(code) {
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assert(code === codes.backslash, 'expected `\\`')
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effects.enter(types.characterEscape)
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effects.enter(types.escapeMarker)
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effects.consume(code)
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effects.exit(types.escapeMarker)
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return inside
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}
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/**
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* After `\`, at punctuation.
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*
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* ```markdown
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* > | a\*b
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* ^
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* ```
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*
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* @type {State}
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*/
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function inside(code) {
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// ASCII punctuation.
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if (asciiPunctuation(code)) {
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effects.enter(types.characterEscapeValue)
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effects.consume(code)
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effects.exit(types.characterEscapeValue)
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effects.exit(types.characterEscape)
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return ok
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}
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return nok(code)
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}
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}
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