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Expr-binary

Change-expr-binary

Modifying constructor for expr-binary structures.

Syntax

(change-expr-binary x 
                    [:op <op>] 
                    [:arg1 <arg1>] 
                    [:arg2 <arg2>])

This is an often useful alternative to make-expr-binary.

We construct a new expr-binary 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-expr-binary

(defmacro change-expr-binary (x &rest args)
  (std::change-aggregate 'expr-binary
                         x args
                         '((:op . expr-binary->op)
                           (:arg1 . expr-binary->arg1)
                           (:arg2 . expr-binary->arg2))
                         'change-expr-binary
                         'nil))