public ExpressionBinaryOperation(Expression left, OperationToken operation, Expression right) {
Debug.Assert(left != null);
Debug.Assert(operation != null);
Debug.Assert(right != null);
this.left = left;
this.operation = operation;
this.right = right;
}
public ExpressionUnaryOperation(OperationToken operation, Expression expression) {
Debug.Assert(operation != null);
Debug.Assert(expression != null);
this.operation = operation;
this.expression = expression;
}