Method parsePrefix

packages/compiler/src/expression_parser/parser.ts:1057–1088

()

  }

  private parsePrefix(): AST {
    if (this.next.type == TokenType.Operator) {
      const start = this.inputIndex;
      const operator = this.next.strValue;
      let result: AST;
      switch (operator) {
        case '+':
          this.advance();
          result = this.parsePrefix();
          return Unary.createPlus(this.span(start), this.sourceSpan(start), result);
        case '-':
          this.advance();
          result = this.parsePrefix();
          return Unary.createMinus(this.span(start), this.sourceSpan(start), result);
        case '!':
          this.advance();
          result = this.parsePrefix();
          return new PrefixNot(this.span(start), this.sourceSpan(start), result);
      }
    } else if (this.next.isKeywordTypeof()) {
      const start = this.inputIndex;
      this.advance();
      const result = this.parsePrefix();
      return new TypeofExpression(this.span(start), this.sourceSpan(start), result);
    } else if (this.next.isKeywordVoid()) {
      const start = this.inputIndex;
      this.advance();
      const result = this.parsePrefix();
      return new VoidExpression(this.span(start), this.sourceSpan(start), result);
    }
    return this.parseCallChain();
  }

  private parseCallChain(): AST {
    const start = this.inputIndex;