Method createPlus

packages/compiler/src/expression_parser/ast.ts:370–380

* Creates a unary plus expression "+x", represented as `Binary` using "x - 0".

(span: ParseSpan, sourceSpan: AbsoluteSourceSpan, expr: AST)

   * Creates a unary plus expression "+x", represented as `Binary` using "x - 0".
   */
  static createPlus(span: ParseSpan, sourceSpan: AbsoluteSourceSpan, expr: AST): Unary {
    return new Unary(
      span,
      sourceSpan,
      '+',
      expr,
      '-',
      expr,
      new LiteralPrimitive(span, sourceSpan, 0),
    );
  }

  /**
   * During the deprecation period this constructor is private, to avoid consumers from creating