Mirror: The magical sticky regex-based parser generator 🧙
Add support for matcher thunks
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src/core.js
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src/core.js
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let match;
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if (typeof pattern === 'function') {
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return pattern(state);
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while (typeof pattern === 'function') pattern = pattern(state);
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return pattern;
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} else if (typeof pattern === 'string') {
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const end = state.index + pattern.length;
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const sub = state.input.slice(state.index, end);
···
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export const match = (name, transform) => (quasis, ...expressions) => {
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const ast = parseDSL(
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quasis,
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expressions.map((expression, i) => `_exec(state, _e${i})`)
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expressions.map((expression, i) => `_e(state, _${i})`)
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);
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const makeMatcher = new Function(
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'_exec',
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'_name',
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'_transform',
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...expressions.map((_expression, i) => `_e${i}`),
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'return ' + astRoot(ast, '_name', transform ? '_transform' : null)
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'_e,_n,_t,' + expressions.map((_expression, i) => `_${i}`).join(','),
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'return ' + astRoot(ast, '_n', transform ? '_t' : null)
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);
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return makeMatcher(_exec, name, transform, ...expressions.map(_pattern));
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};