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#############################################################################
##
## This file is part of GAP, a system for computational discrete algebra.
##
## 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 implements some additional functions relating to types and
## families.
##
#############################################################################
##
#M FiltersType( <type> )
##
## Return list of filters set in the given type.
##
InstallMethod(FiltersType, "for a type", [ IsType ],
type -> FILTERS{ TRUES_FLAGS(type![POS_FLAGS_TYPE]) });
#############################################################################
##
#M FiltersObj( <object> )
##
## Return list of filters set in the type of <object>.
##
InstallMethod(FiltersObj, "for an object", [ IsObject ],
obj -> FiltersType(TypeObj(obj)));
#############################################################################
##
#M NamesFilterShort( flags, max )
##
## Make a shortened list of filter names for display purposes
##
BindGlobal("NamesFilterShort",
function(flags, max)
local names;
names := NamesFilter(flags);
if Length(names) > max then
names := names{[1..max]};
Add(names, "...");
fi;
names := JoinStringsWithSeparator(names, ", ");
return Concatenation("[ ", names, " ]");
end);
#############################################################################
##
#M ViewString( <fam> )
##
InstallMethod( ViewString,
"for a family",
true,
[ IsFamily ],
0,
function(family)
return STRINGIFY("<Family: \"", family!.NAME, "\">");
end);
#############################################################################
##
#M DisplayString( <fam> )
##
InstallMethod( DisplayString,
"for a family",
true,
[ IsFamily ],
0,
function(family)
local res, req_flags, imp_flags, fnams;
res := "";
Append(res, STRINGIFY("name:\n ", family!.NAME));
req_flags := TRUES_FLAGS(family!.REQ_FLAGS);
fnams := NamesFilter(req_flags);
fnams := JoinStringsWithSeparator(fnams, "\n ");
Append(res, STRINGIFY("\nrequired filters:\n ", fnams));
imp_flags := family!.IMP_FLAGS;
if imp_flags <> [ ] then
fnams := NamesFilter(TRUES_FLAGS(imp_flags));
fnams := JoinStringsWithSeparator(fnams, "\n ");
Append(res, STRINGIFY( "\nimplied filters:\n ", fnams));
fi;
return res;
end);
#############################################################################
##
#M ViewString( <type> )
##
InstallOtherMethod( ViewString,
"for a type",
true,
[ IsType ],
0,
function ( type )
local res, family, flags, data;
res := "<Type: (";
family := type![POS_FAMILY_TYPE];
Append(res, family!.NAME);
Append(res, ", ");
flags := type![POS_FLAGS_TYPE];
Append(res, NamesFilterShort(flags, 3) );
Append(res, ")");
data := type![POS_DATA_TYPE];
if data <> false then
Append(res, STRINGIFY(", data: ", data ) );
fi;
Append(res, ">");
return res;
end);
#############################################################################
##
#M DisplayString( <type> )
##
InstallOtherMethod( DisplayString,
"for a type",
true,
[ IsType ],
0,
function ( type )
local res, family, flags, data, fnams;
res := "";
family := type![POS_FAMILY_TYPE];
flags := type![POS_FLAGS_TYPE];
data := type![POS_DATA_TYPE];
Append(res, STRINGIFY("family:\n ", family!.NAME));
if flags <> [ ] or data <> false then
fnams := NamesFilter(TRUES_FLAGS(flags));
fnams := JoinStringsWithSeparator(fnams, "\n ");
Append(res, STRINGIFY("\nfilters:\n ", fnams));
if data <> false then
Append(res, STRINGIFY("\ndata:\n", data ) );
fi;
fi;
return res;
end);
InstallGlobalFunction( TypeOfOperation,
function(oper)
local type, flags, types, catok, repok, propok, seenprop, t;
if not IsOperation(oper) then
ErrorNoReturn("<oper> must be an operation");
fi;
type := "Operation";
if IS_IDENTICAL_OBJ(oper, IS_OBJECT) then
type := "Filter";
elif IS_CONSTRUCTOR(oper) then
type := "Constructor";
elif IsFilter(oper) then
type := "Filter";
flags := FLAGS_FILTER(oper);
if flags <> false then
flags := TRUES_FLAGS(flags);
types := [];
atomic readonly FILTER_REGION do
for t in flags do
AddSet(types, INFO_FILTERS[t]);
od;
od;
catok := true;
repok := true;
propok := true;
seenprop := false;
for t in types do
if not t in FNUM_REPS then
repok := false;
fi;
if not t in FNUM_CATS then
catok := false;
fi;
if not t in FNUM_PROS and not t in FNUM_TPRS then
propok := false;
fi;
if t in FNUM_PROS then
seenprop := true;
fi;
od;
if seenprop and propok then
type := "Property";
elif catok then
type := "Category";
elif repok then
type := "Representation";
fi;
fi;
elif IsOperation(FLAG1_FILTER(oper)) and IsOperation(FLAG1_FILTER(oper)) then
# this is a setter for an and-filter
type := "Setter";
elif FLAG1_FILTER(oper) > 0 then
# this is a setter for an elementary filter
type := "Setter";
elif Tester(oper) <> false then
# oper is an attribute
type := "Attribute";
fi;
return type;
end);
InstallGlobalFunction( IsCategory,
function(object)
return IsOperation(object) and TypeOfOperation(object) = "Category";
end);
InstallGlobalFunction( IsRepresentation,
function(object)
return IsOperation(object) and TypeOfOperation(object) = "Representation";
end);
InstallGlobalFunction( IsAttribute,
function(object)
return IsOperation(object) and TypeOfOperation(object) = "Attribute";
end);
InstallGlobalFunction( IsProperty,
function(object)
return IsOperation(object) and TypeOfOperation(object) = "Property";
end);
InstallGlobalFunction( CategoryByName,
function(name)
local fid;
atomic readonly CATS_AND_REPS, FILTER_REGION do
for fid in CATS_AND_REPS do
if (INFO_FILTERS[fid] in FNUM_CATS) and
(NAME_FUNC(FILTERS[fid]) = name) then
return FILTERS[fid];
fi;
od;
od;
return fail;
end);
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