0879a6d608
* Add Subsume JSON transform https://github.com/tc39/proposal-json-superset is at stage 3. This allows U+2028 LINE SEPARATOR and U+2029 PARAGRAPH SEPARATOR to appear unescaped inside strings and directives. * Move to Stage 3 * Break diretive parsing * Update README * Handle multi-escape sequences * Remove babylon files after rename
30 lines
844 B
JavaScript
30 lines
844 B
JavaScript
import { declare } from "@babel/helper-plugin-utils";
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import syntaxJsonStrings from "@babel/plugin-syntax-json-strings";
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export default declare(api => {
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api.assertVersion(7);
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const regex = /(\\*)([\u2028\u2029])/g;
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function replace(match, escapes, separator) {
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// If there's an odd number, that means the separator itself was escaped.
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// "\X" escapes X.
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// "\\X" escapes the backslash, so X is unescaped.
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const isEscaped = escapes.length % 2 === 1;
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if (isEscaped) return match;
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return `${escapes}\\u${separator.charCodeAt(0).toString(16)}`;
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}
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return {
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inherits: syntaxJsonStrings,
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visitor: {
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"DirectiveLiteral|StringLiteral"({ node }) {
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const { extra } = node;
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if (!extra || !extra.raw) return;
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extra.raw = extra.raw.replace(regex, replace);
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},
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},
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};
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});
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