1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
|
#############################################################################
##
#W weakptr.tst GAP Library Steve Linton
##
#H @(#)$Id: weakptr.tst,v 4.12 2000/02/24 18:15:26 wdg Exp $
##
#Y Copyright (C) 1997,
##
gap> START_TEST("$Id: weakptr.tst,v 4.12 2000/02/24 18:15:26 wdg Exp $");
#
# Low level access functions
#
gap> w := WeakPointerObj([1,,2^40*10^10,Z(17),[2,3,4],fail,SymmetricGroup(5),]);;
gap> Print(w,"\n");
WeakPointerObj( [ 1, , 10995116277760000000000, Z(17),
[ 2, 3, 4 ], fail, SymmetricGroup( [ 1 .. 5 ] ) ] )
gap> LengthWPObj(w);
7
gap> List([1..7],x->IsBoundElmWPObj(w,x));
[ true, false, true, true, true, true, true ]
gap> List([1..7],x->ElmWPObj(w,x));
[ 1, fail, 10995116277760000000000, Z(17), [ 2, 3, 4 ], fail,
Sym( [ 1 .. 5 ] ) ]
gap> SetElmWPObj(w,9,[]);
gap> Print(w,"\n");
WeakPointerObj( [ 1, , 10995116277760000000000, Z(17),
[ 2, 3, 4 ], fail, SymmetricGroup( [ 1 .. 5 ] ), , [ ] ] )
gap> UnbindElmWPObj(w,4);
gap> Print(w,"\n");
WeakPointerObj( [ 1, , 10995116277760000000000, ,
[ 2, 3, 4 ], fail, SymmetricGroup( [ 1 .. 5 ] ), , [ ] ] )
gap> UnbindElmWPObj(w,9); LengthWPObj(w);
7
gap> 1;;2;;3;;
gap> GASMAN("collect");
gap> Print(w,"\n");
WeakPointerObj( [ 1, , , , , fail ] )
gap> LengthWPObj(w);
6
gap> Print(ShallowCopy(w),"\n");
WeakPointerObj( [ 1, , , , , fail ] )
#
# Access as lists
#
gap> w[1];
1
gap> w{[2..4]} := [[1,2],E(5),311];
[ [ 1, 2 ], E(5), 311 ]
gap> Print(w,"\n");
WeakPointerObj( [ 1, [ 1, 2 ], E(5), 311, , fail ] )
gap> Print(StructuralCopy(w),"\n");
WeakPointerObj( [ 1, [ 1, 2 ], E(5), 311, , fail ] )
gap> Immutable(w);
[ 1, [ 1, 2 ], E(5), 311,, fail ]
gap> IsBound(w[2]);
true
gap> GASMAN("collect");
gap> IsBound(w[5]);
false
gap> Unbind(w[2]);
gap> Print(w,"\n");
WeakPointerObj( [ 1, , E(5), 311, , fail ] )
gap> STOP_TEST( "weakptr.tst", 24477500 );
|
