7.3 Tracing Methods

After the call of TraceMethods with a list oprs of operations, whenever a method of one of the operations in oprs is called the information string used in the installation of the method is printed.

turns the tracing off for all operations in oprs.

gap> TraceMethods( [ Size ] );
gap> g:= Group( (1,2,3), (1,2) );;
gap> Size( g );
#I  Size: method for a permutation group
#I  Setter(Size): system setter
#I  Size: system getter
#I  Size: system getter
6
gap> UntraceMethods( [ Size ] );

If flag is true, tracing for all immediate methods is turned on. If flag is false it is turned off. (There is no facility to trace specific immediate methods.)

gap> TraceImmediateMethods( true );
gap> g:= Group( (1,2,3), (1,2) );;
#I  immediate: IsFinitelyGeneratedGroup
gap> Size( g );
#I  Size: method for a permutation group
#I  immediate: IsFinitelyGeneratedGroup
#I  immediate: IsCyclic
#I  immediate: IsFinitelyGeneratedGroup
#I  Setter(Size): system setter
#I  Size: system getter
#I  immediate: IsPerfectGroup
#I  Size: system getter
#I  immediate: IsEmpty
6
gap> TraceImmediateMethods( false );
gap> UntraceMethods( [ Size ] );

This example gives an explanation for the two calls of the ``system getter'' for Size. Namely, there are immediate methods that access the known size of the group. Note that the group g was known to be finitely generated already before the size was computed, the calls of the immediate method for IsFinitelyGeneratedGroup after the call of Size have other arguments than g.

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