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Transaction

Change-transaction

Modifying constructor for transaction structures.

Syntax

(change-transaction x 
                    [:unwrap <unwrap>])

This is an often useful alternative to make-transaction.

We construct a new transaction structure that is a copy of x, except that you can explicitly change some particular fields. Any fields you don't mention just keep their values from x.

Definition

This is an ordinary change- macro introduced by fty::defprod.

Macro: change-transaction

(defmacro change-transaction (x &rest args)
  (std::change-aggregate 'transaction
                         x
                         args '((:unwrap . transaction->unwrap))
                         'change-transaction
                         'nil))