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|
#############################################################################
##
#W compat3c.g GAP library Frank Celler
##
#H @(#)$Id: compat3c.g,v 4.13 2002/04/15 10:04:30 sal Exp $
##
#Y Copyright (C) 1997, Lehrstuhl D fuer Mathematik, RWTH Aachen, Germany
#Y (C) 1998 School Math and Comp. Sci., University of St. Andrews, Scotland
#Y Copyright (C) 2002 The GAP Group
##
## This file provides methods to make records behave as records with
## `operations' component in {\GAP} 3.
##
Revision.compat3c_g :=
"@(#)$Id: compat3c.g,v 4.13 2002/04/15 10:04:30 sal Exp $";
#############################################################################
##
## The files `compat3a.g' and `compat3b.g' must have been read before this
## file can be read.
##
if not IsBound( Revision.compat3b_g ) then
ReadLib( "compat3b.g" );
fi;
#############################################################################
##
#M PrintObj( <record> )
#M ViewObj( <record> )
##
## The record <record> is printed either by printing all its components or,
## if the component `operations' of <record> is bound and has a component
## `Print', this function is called with argument <record>.
##
InstallMethod( PrintObj,
"for a record, look for entry in `operations'",
true,
[ IsRecord ], SUM_FLAGS,
PRINT_PREC );
InstallMethod( ViewObj,
"for a record, look for entry in `operations'",
true,
[ IsRecord ], SUM_FLAGS,
PRINT_PREC );
#############################################################################
##
#M <record> + <object>
#M <object> + <record>
##
## Note that `SUM_PREC' checks first the right operand for being a record
## with `operations' component, and then the left operand.
##
InstallOtherMethod( \+,
"record + object",
true,
[ IsRecord,
IsObject ],
SUM_FLAGS,
SUM_PREC );
InstallOtherMethod( \+,
"object + record",
true,
[ IsObject,
IsRecord ],
SUM_FLAGS,
SUM_PREC );
#############################################################################
##
#M ZeroOp( <record> )
##
InstallOtherMethod( ZeroOp,
"method for a record (expect `operations' component)",
true,
[ IsRecord ],
SUM_FLAGS,
function( record )
if IsBound( record.operations )
and IsBound( record.operations.\* ) then
return record.operations.\*( 0, record );
else
TryNextMethod();
fi;
end );
#############################################################################
##
#M AdditiveInverseOp( <record> )
##
## Note that we cannot simply delegate to multiplication by `-1' since it
## may happen that no individual multiplication was installed, and the
## generic multiplication would delegate back to `AdditiveInverseOp'.
##
InstallOtherMethod( AdditiveInverseOp,
"method for a record (expect `operations' component)",
true,
[ IsRecord ],
SUM_FLAGS,
function( record )
if IsBound( record.operations ) then
if IsOperationsRecord( record.operations )
and IsBound( record.operations!.COMPONENTS.\* ) then
return record.operations.\*( -1, record );
elif IsRecord( record.operations )
and IsBound( record.operations.\* ) then
return record.operations.\*( -1, record );
fi;
fi;
TryNextMethod();
end );
#############################################################################
##
#M <record> - <object>
#M <object> - <record>
##
## Note that `DIFF_PREC' checks first the right operand for being a record
## with `operations' component, and then the left operand.
##
InstallOtherMethod( \-,
"record - object",
true,
[ IsRecord,
IsObject ],
SUM_FLAGS,
DIFF_PREC );
InstallOtherMethod( \-,
"object - record",
true,
[ IsObject,
IsRecord ],
SUM_FLAGS,
DIFF_PREC );
#############################################################################
##
#M <record> * <object>
#M <object> * <record>
##
## Note that `PROD_PREC' checks first the right operand for being a record
## with `operations' component, and then the left operand.
##
InstallOtherMethod( \*,
"record * object",
true,
[ IsRecord,
IsObject ],
SUM_FLAGS,
PROD_PREC );
InstallOtherMethod( \*,
"object * record",
true,
[ IsObject,
IsRecord ],
SUM_FLAGS,
PROD_PREC );
#############################################################################
##
#M OneOp( <record> )
##
## Note that we cannot simply delegate to powering by `0' since it
## may happen that no individual powering was installed, and the
## generic powering would delegate back to `One'.
##
InstallOtherMethod( OneOp,
"method for a record (expect `operations' component)",
true,
[ IsRecord ],
SUM_FLAGS,
function( record )
if IsBound( record.operations ) then
if IsOperationsRecord( record.operations )
and IsBound( record.operations!.COMPONENTS.\^ ) then
return record.operations.\^( record, 0 );
elif IsRecord( record.operations )
and IsBound( record.operations.\^ ) then
return record.operations.\^( record, 0 );
fi;
fi;
TryNextMethod();
end );
#############################################################################
##
#M InverseOp( <record> )
##
## Note that we cannot simply delegate to powering by `-1' since it
## may happen that no individual powering was installed, and the
## generic powering would delegate back to `Inverse'.
##
InstallOtherMethod( InverseOp,
"method for a record (expect `operations' component)",
true,
[ IsRecord ],
SUM_FLAGS,
function( record )
if IsBound( record.operations ) then
if IsOperationsRecord( record.operations )
and IsBound( record.operations!.COMPONENTS.\^ ) then
return record.operations.\^( record, -1 );
elif IsRecord( record.operations )
and IsBound( record.operations.\^ ) then
return record.operations.\^( record, -1 );
fi;
fi;
TryNextMethod();
end );
#############################################################################
##
#M <record> / <object>
#M <object> / <record>
##
## Note that `QUO_PREC' checks first the right operand for being a record
## with `operations' component, and then the left operand.
##
InstallOtherMethod( \/,
"record / object",
true,
[ IsRecord,
IsObject ],
SUM_FLAGS,
QUO_PREC );
InstallOtherMethod( \/,
"object / record",
true,
[ IsObject,
IsRecord ],
SUM_FLAGS,
QUO_PREC );
#############################################################################
##
#M <record> ^ <object>
#M <object> ^ <record>
##
## Note that `POW_PREC' checks first the right operand for being a record
## with `operations' component, and then the left operand.
##
InstallOtherMethod( \^,
"record ^ object",
true,
[ IsRecord,
IsObject ],
SUM_FLAGS,
POW_PREC );
InstallOtherMethod( \^,
"object ^ record",
true,
[ IsObject,
IsRecord ],
SUM_FLAGS,
POW_PREC );
#############################################################################
##
#M <record> mod <object>
#M <object> mod <record>
##
## Note that `MOD_PREC' checks first the right operand for being a record
## with `operations' component, and then the left operand.
##
InstallOtherMethod( \mod,
"record mod object",
true,
[ IsRecord,
IsObject ],
SUM_FLAGS,
MOD_PREC );
InstallOtherMethod( \mod,
"object mod record",
true,
[ IsObject,
IsRecord ],
SUM_FLAGS,
MOD_PREC );
#############################################################################
##
#M LeftQuotient( <record>, <object> )
#M LeftQuotient( <object>, <record> )
##
## Note that `LQUO_PREC' checks first the right operand for being a record
## with `operations' component, and then the left operand.
##
InstallOtherMethod( LeftQuotient,
"record, object",
true,
[ IsRecord,
IsObject ],
SUM_FLAGS,
LQUO_PREC );
InstallOtherMethod( LeftQuotient,
"object, record",
true,
[ IsObject,
IsRecord ],
SUM_FLAGS,
LQUO_PREC );
#############################################################################
##
#M Comm( <record>, <object> )
#M Comm( <object>, <record> )
##
## Note that `COMM_PREC' checks first the right operand for being a record
## with `operations' component, and then the left operand.
##
InstallOtherMethod( Comm,
"record, object",
true,
[ IsRecord,
IsObject ],
SUM_FLAGS,
COMM_PREC );
InstallOtherMethod( Comm,
"object, record",
true,
[ IsObject,
IsRecord ],
SUM_FLAGS,
COMM_PREC );
#############################################################################
##
#M <object> in <record>
##
InstallOtherMethod( \in,
"object in record",
true,
[ IsObject,
IsRecord ],
SUM_FLAGS,
IN_PREC );
#############################################################################
##
#M <record> = <object>
#M <object> = <record>
##
## Note that `EQ_PREC' checks first the right operand for being a record
## with `operations' component, and then the left operand.
##
InstallOtherMethod( \=,
"record = object",
true,
[ IsRecord,
IsObject ],
SUM_FLAGS,
EQ_PREC );
InstallOtherMethod( \=,
"object = record",
true,
[ IsObject,
IsRecord ],
SUM_FLAGS,
EQ_PREC );
#############################################################################
##
#M <record> < <object>
#M <object> < <record>
##
## Note that `LT_PREC' checks first the right operand for being a record
## with `operations' component, and then the left operand.
##
InstallOtherMethod( \<,
"record < object",
true,
[ IsRecord,
IsObject ],
SUM_FLAGS,
LT_PREC );
InstallOtherMethod( \<,
"object < record",
true,
[ IsObject,
IsRecord ],
SUM_FLAGS,
LT_PREC );
#############################################################################
##
#F InstallRecordMethod1Args( <opr>, <compname> )
##
## provides the installation of a method for the unary operation <opr> that
## is associated to the component <compname> of a record.
##
InstallRecordMethod1Args := function( opr, compname )
InstallOtherMethod( opr,
"method for a record (expect `operations' component)",
true,
[ IsRecord ], 1, # override method that ignores `operations'
function( record )
if IsBound( record.operations ) then
if IsOperationsRecord( record.operations )
and IsBound( record.operations!.COMPONENTS.( compname ) ) then
return record.operations!.COMPONENTS.( compname )( record );
elif IsRecord( record.operations )
and IsBound( record.operations.( compname ) ) then
return record.operations.( compname )( record );
fi;
fi;
TryNextMethod();
end );
end;
#############################################################################
##
#M Int( <record> ) . . . . . . . . . . . . . for a record with `operations'
##
InstallRecordMethod1Args( Int, "Int" );
#############################################################################
##
#M String( <record> ) . . . . . . . . . . . for a record with `operations'
##
InstallRecordMethod1Args( String, "String" );
#############################################################################
##
## In order to allow matrices, groups etc.~of records,
## we install the implication that records are scalars.
##
## For convincing the kernel, we need some very ugly hacks.
##
InstallTrueMethod( IsScalar, IsRecord );
InstallTrueMethod( IsScalarCollection, IsRecordCollection );
InstallTrueMethod( IsScalarCollColl, IsRecordCollColl );
# for chaching types of homogeneous lists, assigned in kernel when needed
RecordsFamily!.TYPES_LIST_FAM := [];
# for efficiency
RecordsFamily!.TYPES_LIST_FAM[27] := 0;
Fam:= CollectionsFamily( RecordsFamily );
Fam!.IMP_FLAGS := AND_FLAGS( Fam!.IMP_FLAGS,
FLAGS_FILTER( IsScalarCollection ) );
Fam!.TYPES_LIST_FAM := [,,,,,,,,,,,,,,,,,,,,,,,,,,false]; # list with 12 holes
Fam:= CollectionsFamily( Fam );
Fam!.IMP_FLAGS := AND_FLAGS( Fam!.IMP_FLAGS,
FLAGS_FILTER( IsScalarCollColl ) );
MakeReadWriteGVar( "TYPE_PREC_MUTABLE" );
TYPE_PREC_MUTABLE := NewType( RecordsFamily,
IS_MUTABLE_OBJ and IsRecord and IsInternalRep );
MakeReadOnlyGVar( "TYPE_PREC_MUTABLE" );
MakeReadWriteGVar( "TYPE_PREC_IMMUTABLE" );
TYPE_PREC_IMMUTABLE := NewType( RecordsFamily,
IsRecord and IsInternalRep );
MakeReadOnlyGVar( "TYPE_PREC_IMMUTABLE" );
#############################################################################
##
#E compat3c.g . . . . . . . . . . . . . . . . . . . . . . . . . . ends here
|
