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Backtrace-frame

Change-backtrace-frame

Modifying constructor for backtrace-frame structures.

Syntax

(change-backtrace-frame x 
                        [:index <index>] 
                        [:rune <rune>] 
                        [:objs <objs>])

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

We construct a new backtrace-frame 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-frame

(defmacro change-backtrace-frame (x &rest args)
  (std::change-aggregate 'backtrace-frame
                         x args
                         '((:index . backtrace-frame->index)
                           (:rune . backtrace-frame->rune)
                           (:objs . backtrace-frame->objs))
                         'change-backtrace-frame
                         'nil))