Mirror: The magical sticky regex-based parser generator 🧙
Fix empty matches being impossible at end of input
+11
-7
+6
-7
src/core.js
+6
-7
src/core.js
···
10
10
11
11
const execString = (pattern) => {
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return (state) => {
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-
const input = state.quasis[state.x];
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-
if (input && state.y < input.length) {
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+
if (state.x < state.quasis.length) {
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+
const input = state.quasis[state.x];
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for (let i = 0, l = pattern.length; i < l; i++)
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if (input.charCodeAt(state.y + i) !== pattern.charCodeAt(i))
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return null;
···
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? new RegExp(pattern.source, 'y')
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: new RegExp(pattern.source + '|()', 'g');
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return (state) => {
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-
const input = state.quasis[state.x];
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-
if (input && state.y < input.length) {
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+
if (state.x < state.quasis.length) {
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const input = state.quasis[state.x];
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pattern.lastIndex = state.y;
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-
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let match;
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if (isStickySupported) {
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if (pattern.test(input))
···
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let match;
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if (
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-
state.y >= state.quasis[state.x].length &&
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-
state.x < state.expressions.length
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state.x < state.expressions.length &&
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+
state.y >= state.quasis[state.x].length
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) {
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state.y = 0;
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match = state.expressions[state.x++];
+5
src/core.test.js
+5
src/core.test.js
···
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`('should return $result when $input is passed', ({ input, result }) => {
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expectToParse(node, input, result);
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});
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+
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+
it('matches empty regex patterns', () => {
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+
const node = match('node')`${/[ ]*/}`;
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+
expectToParse(node, '', ['']);
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+
});
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});
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describe('optional matcher', () => {