*debug-print-length* Variable

Summary

Controls the number of object components printed in debugger output.

Package

dbg

Initial Value

40

Description

The variable *debug-print-length* is used to control the number of components of an object which are printed during output from the debugger. If its value is a positive integer then the components up to that number are printed. If it is nil then all the parts of an object are shown.

Examples

USER 83 > (setq dbg:*debug-print-length* 3)

3 
USER 84 > (aref
'(1 2 3 4 "Jenny" "cottage" "door")
              2)

Error: (1 2 3 4 Jenny cottage door) must be
      an array
  1 (abort) return to top loop level 0.

Type :c followed by a number to proceed

USER 85 : 1 > :v
Call to ARRAY-ACCESS  :
Arg 0 (ARRAY): (1 2 3 ...)
Arg 1 (SUBSCRIPTS): (2)
Arg 2 (SET-P): NIL Arg 3 (VALUE): NIL

Notes

*debug-print-length* is an extension to Common Lisp.

See also

3.6 Debugger control variables