Documentation

set the global trace level

read the global trace level

set the global trace command. This command does the trace output

acces the command for trace output

run an arrow with a given trace level, the old trace level is restored after the arrow execution

apply a trace arrow and issue message to stderr

trace the current value transfered in a sequence of arrows.

The value is formated by a string conversion function. This is a substitute for the old and less general traceString function

an old alias for traceValue

issue a string message as trace

issue the source representation of a document if trace level >= 3

for better readability the source is formated with indentDoc

issue the tree representation of a document if trace level >= 4

trace a main computation step issue a message when trace level >= 1, issue document source if level >= 3, issue tree when level is >= 4