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Backtrace-spec

Change-backtrace-spec

Modifying constructor for backtrace-spec structures.

Syntax

(change-backtrace-spec x 
                       [:rune <rune>] 
                       [:vars <vars>])

This is an often useful alternative to make-backtrace-spec.

We construct a new backtrace-spec 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 defprod.

Macro: change-backtrace-spec

(defmacro change-backtrace-spec (x &rest args)
  (std::change-aggregate 'backtrace-spec
                         x args
                         '((:rune . backtrace-spec->rune)
                           (:vars . backtrace-spec->vars))
                         'change-backtrace-spec
                         'nil))