Method _consumeBlockStart

packages/compiler/src/ml_parser/lexer.ts:297–342

(start: CharacterCursor)

  }

  private _consumeBlockStart(start: CharacterCursor) {
    this._requireCharCode(chars.$AT);
    this._beginToken(TokenType.BLOCK_OPEN_START, start);
    const startToken = this._endToken([this._getBlockName()]);

    if (this._cursor.peek() === chars.$LPAREN) {
      // Advance past the opening paren.
      this._cursor.advance();
      // Capture the parameters.
      this._consumeBlockParameters();
      // Allow spaces before the closing paren.
      this._attemptCharCodeUntilFn(isNotWhitespace);

      if (this._attemptCharCode(chars.$RPAREN)) {
        // Allow spaces after the paren.
        this._attemptCharCodeUntilFn(isNotWhitespace);
      } else {
        startToken.type = TokenType.INCOMPLETE_BLOCK_OPEN;
        return;
      }
    }

    if (startToken.parts[0] === 'default never' && this._attemptCharCode(chars.$SEMICOLON)) {
      this._beginToken(TokenType.BLOCK_OPEN_END);
      this._endToken([]);
      this._beginToken(TokenType.BLOCK_CLOSE);
      this._endToken([]);
      return;
    }

    if (this._attemptCharCode(chars.$LBRACE)) {
      this._beginToken(TokenType.BLOCK_OPEN_END);
      this._endToken([]);
    } else if (
      this._isBlockStart() &&
      (startToken.parts[0] === 'case' || startToken.parts[0] === 'default')
    ) {
      // We only allow @case statements to be consecutive without a block in between.
      this._beginToken(TokenType.BLOCK_OPEN_END);
      this._endToken([]);
      this._beginToken(TokenType.BLOCK_CLOSE);
      this._endToken([]);
    } else {
      startToken.type = TokenType.INCOMPLETE_BLOCK_OPEN;
    }
  }

  private _consumeBlockEnd(start: CharacterCursor) {
    this._beginToken(TokenType.BLOCK_CLOSE, start);