Method _consumeExpansion

packages/compiler/src/ml_parser/parser.ts:206–242

(token: ExpansionFormStartToken)

  }

  private _consumeExpansion(token: ExpansionFormStartToken) {
    const switchValue = this._advance<TextToken>();

    const type = this._advance<TextToken>();
    const cases: html.ExpansionCase[] = [];

    // read =
    while (this._peek.type === TokenType.EXPANSION_CASE_VALUE) {
      const expCase = this._parseExpansionCase();
      if (!expCase) return; // error
      cases.push(expCase);
    }

    // read the final }
    if (this._peek.type !== TokenType.EXPANSION_FORM_END) {
      this.errors.push(
        TreeError.create(null, this._peek.sourceSpan, `Invalid ICU message. Missing '}'.`),
      );
      return;
    }
    const sourceSpan = new ParseSourceSpan(
      token.sourceSpan.start,
      this._peek.sourceSpan.end,
      token.sourceSpan.fullStart,
    );
    this._addToParent(
      new html.Expansion(
        switchValue.parts[0],
        type.parts[0],
        cases,
        sourceSpan,
        switchValue.sourceSpan,
      ),
    );

    this._advance();
  }

  private _parseExpansionCase(): html.ExpansionCase | null {
    const value = this._advance<ExpansionCaseValueToken>();