chrono-node
Version:
A natural language date parser in Javascript
37 lines • 1.45 kB
JavaScript
;
Object.defineProperty(exports, "__esModule", { value: true });
exports.AbstractParserWithWordBoundaryChecking = void 0;
class AbstractParserWithWordBoundaryChecking {
constructor() {
this.cachedInnerPattern = null;
this.cachedPattern = null;
}
innerPatternHasChange(context, currentInnerPattern) {
return this.innerPattern(context) !== currentInnerPattern;
}
patternLeftBoundary() {
return `(\\W|^)`;
}
pattern(context) {
if (this.cachedInnerPattern) {
if (!this.innerPatternHasChange(context, this.cachedInnerPattern)) {
return this.cachedPattern;
}
}
this.cachedInnerPattern = this.innerPattern(context);
this.cachedPattern = new RegExp(`${this.patternLeftBoundary()}${this.cachedInnerPattern.source}`, this.cachedInnerPattern.flags);
return this.cachedPattern;
}
extract(context, match) {
var _a;
const header = (_a = match[1]) !== null && _a !== void 0 ? _a : "";
match.index = match.index + header.length;
match[0] = match[0].substring(header.length);
for (let i = 2; i < match.length; i++) {
match[i - 1] = match[i];
}
return this.innerExtract(context, match);
}
}
exports.AbstractParserWithWordBoundaryChecking = AbstractParserWithWordBoundaryChecking;
//# sourceMappingURL=AbstractParserWithWordBoundary.js.map