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import * as common from './common.js';import * as util from './util.js';import {Interval} from './Interval.js';
// --------------------------------------------------------------------// Private stuff// --------------------------------------------------------------------
export class MatchResult {  constructor(      matcher,      input,      startExpr,      cst,      cstOffset,      rightmostFailurePosition,      optRecordedFailures,  ) {    this.matcher = matcher;    this.input = input;    this.startExpr = startExpr;    this._cst = cst;    this._cstOffset = cstOffset;    this._rightmostFailurePosition = rightmostFailurePosition;    this._rightmostFailures = optRecordedFailures;
    if (this.failed()) {      /* eslint-disable no-invalid-this */      common.defineLazyProperty(this, 'message', function() {        const detail = 'Expected ' + this.getExpectedText();        return (          util.getLineAndColumnMessage(this.input, this.getRightmostFailurePosition()) + detail        );      });      common.defineLazyProperty(this, 'shortMessage', function() {        const detail = 'expected ' + this.getExpectedText();        const errorInfo = util.getLineAndColumn(            this.input,            this.getRightmostFailurePosition(),        );        return 'Line ' + errorInfo.lineNum + ', col ' + errorInfo.colNum + ': ' + detail;      });      /* eslint-enable no-invalid-this */    }  }
  succeeded() {    return !!this._cst;  }
  failed() {    return !this.succeeded();  }
  getRightmostFailurePosition() {    return this._rightmostFailurePosition;  }
  getRightmostFailures() {    if (!this._rightmostFailures) {      this.matcher.setInput(this.input);      const matchResultWithFailures = this.matcher._match(this.startExpr, {        tracing: false,        positionToRecordFailures: this.getRightmostFailurePosition(),      });      this._rightmostFailures = matchResultWithFailures.getRightmostFailures();    }    return this._rightmostFailures;  }
  toString() {    return this.succeeded() ?      '[match succeeded]' :      '[match failed at position ' + this.getRightmostFailurePosition() + ']';  }
  // Return a string summarizing the expected contents of the input stream when  // the match failure occurred.  getExpectedText() {    if (this.succeeded()) {      throw new Error('cannot get expected text of a successful MatchResult');    }
    const sb = new common.StringBuffer();    let failures = this.getRightmostFailures();
    // Filter out the fluffy failures to make the default error messages more useful    failures = failures.filter(failure => !failure.isFluffy());
    for (let idx = 0; idx < failures.length; idx++) {      if (idx > 0) {        if (idx === failures.length - 1) {          sb.append(failures.length > 2 ? ', or ' : ' or ');        } else {          sb.append(', ');        }      }      sb.append(failures[idx].toString());    }    return sb.contents();  }
  getInterval() {    const pos = this.getRightmostFailurePosition();    return new Interval(this.input, pos, pos);  }}