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#############################################################################
##
## This file is part of GAP, a system for computational discrete algebra.
## This file's authors include Steve Linton.
##
## Copyright of GAP belongs to its developers, whose names are too numerous
## to list here. Please refer to the COPYRIGHT file for details.
##
## SPDX-License-Identifier: GPL-2.0-or-later
##
## This file defines some functions that tweak the behaviour of attributes
##
#############################################################################
##
#F EnableAttributeValueStoring( <attr> ) tell the attribute to resume
## storing values
##
InstallGlobalFunction(EnableAttributeValueStoring, function( attr )
Assert(1,IsOperation(attr));
Assert(2,Setter(attr) <> false);
Info(InfoAttributes + InfoWarning, 3, "Enabling value storing for ",NAME_FUNC(attr));
SET_ATTRIBUTE_STORING( attr, true);
end);
#############################################################################
##
#F DisableAttributeValueStoring( <attr> ) tell the attribute to stop
## storing values
##
InstallGlobalFunction(DisableAttributeValueStoring, function( attr )
Assert(1,IsOperation(attr));
Assert(2,Setter(attr) <> false);
Info(InfoAttributes + InfoWarning, 2, "Disabling value storing for ",NAME_FUNC(attr));
SET_ATTRIBUTE_STORING( attr, false);
end);
Unbind(CHECK_REPEATED_ATTRIBUTE_SET);
BindGlobal( "CHECK_REPEATED_ATTRIBUTE_SET", function(obj, name, val)
if InfoLevel(InfoAttributes) >= 3 then
if not IsBound(obj!.(name)) then
Info(InfoAttributes, 3, "Attribute ", name, " of ", obj, " is marked as assigned, but it has no value");
elif obj!.(name) <> val then
Info(InfoAttributes, 3, "Attribute ", name, " of ", obj, " already set to ", obj!.(name), ", cannot be changed to ", val);
fi;
fi;
end );
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