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36 lines
885 B
JavaScript
36 lines
885 B
JavaScript
var characterEscape = {
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name: 'characterEscape',
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tokenize: tokenizeCharacterEscape
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}
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export default characterEscape
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import assert from 'assert'
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import asciiPunctuation from '../character/ascii-punctuation.mjs'
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import codes from '../character/codes.mjs'
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import types from '../constant/types.mjs'
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function tokenizeCharacterEscape(effects, ok, nok) {
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return start
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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 open
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}
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function open(code) {
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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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