10 The HCL Package

trace-print-pretty

Variable

Summary

Controls the amount of whitespace in trace output.

Package

hcl

Initial Value

nil

Description

*trace-print-pretty* controls the amount of whitespace printed during output from tracing. If it is notnil then extra whitespace is inserted to make the output more comprehensible.*print-pretty* is bound to the value of*trace-print-pretty* while printing tracing information.

Examples

USER 6 > (trace macroexpand-1)

MACROEXPAND-1 
USER 7 > (setq *trace-print-pretty* t                    
            *print-pretty* nil)

NIL 
USER 8 > (defmacro sum (n)
            '(do ((i 0 (1+ i))
                  (res 0 (+ i res)))
                 ((= i ,n) res)))

SUM 
USER 9 > (macroexpand-1 '(sum 3))

0 MACROEXPAND-1 > ((SUM 3)) 
0 MACROEXPAND-1 < ((DO ((I 0 (1+ I))
                     (RES 0 (+ I RES)))
                    ((= I 3)
                    RES))                    
                  T) 
(DO ((I 0 (1+ I)) (RES 0 (+ I RES))) ((= I 3) RES)) 
T

Notes

*trace-print-pretty* is an extension to Common Lisp.

See also

trace