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Instruction-unary

Change-instruction-unary

Modifying constructor for instruction-unary structures.

Syntax

(change-instruction-unary x 
                          [:op <op>] 
                          [:arg <arg>] 
                          [:into <into>])

This is an often useful alternative to make-instruction-unary.

We construct a new instruction-unary 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-instruction-unary

(defmacro change-instruction-unary (x &rest args)
  (std::change-aggregate 'instruction-unary
                         x args
                         '((:op . instruction-unary->op)
                           (:arg . instruction-unary->arg)
                           (:into . instruction-unary->into))
                         'change-instruction-unary
                         'nil))