This script defines debug utilities and is included in the J standard library. Definitions are loaded into the z locale.
| D | dbctx, dberm, dberr, dbg, dbhelp, dbjmp, dblocals, dblxq, dblxs, dbnxt, dbq, dbr, dbret, dbrr, dbrrx, dbrun, dbs, dbsig, dbsq, dbss, dbst, dbstack, dbstk, dbstop, dbstopme, dbstopnext, dbstops, dbtrace, dbview |
| dberm | v | last error message |
| dberr | v | last error number |
| dbg | v | turn debugging window on/off |
| dbhelp | n | display help message |
| dbjmp | v | jump to line number |
| dblxq | v | latent expression query |
| dblxs | v | latent expression set |
| dbnxt | v | run next (skip line and run) |
| dbq | v | queries suspension mode (set by dbr) |
| dbr | v | reset, set suspension mode (0=disable, 1=enable) |
| dbret | v | exit and return argument |
| dbrr | v | re-run with specified arguments |
| dbrrx | v | re-run with specified executed arguments |
| dbrun | v | run again (from current stop) |
| dbs | v | display stack |
| dbsig | v | signal error |
| dbsq | v | stop query |
| dbss | v | stop set |
| dbst | v | returns stack text |
| dbstk | v | call stack |
| dbtrace | v | trace control |
| dbview | v | view stack |
Display context as character matrix
y is ignored
x is the number of lines before and after the current stop
Display names and locals on stack.
[namelist] dblocals stack_indicesIf indices is empty, defaults to all
dblocals '' NB. display all local names in stack
'abc Z' dblocals i.5 NB. display names abc and Z where found in first 5 definitions on stackDisplays call stack with headerIgnores definition and source script (default)
y is the number of lines to display, all if empty or a name on the stack
limits display to screenwidth
Set stops on all lines in namelist
Adds to current set of stops.
Set stops on current definition if y.
Does nothing if suspension is off.
Set stop on next line of current definition if y.
Does nothing if suspension is off.
Set stops on all lines in namelist
Replaces current set of stops