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-- PSL - Simple subset
-- Copyright (C) 2002-2016 Tristan Gingold
--
-- GHDL is free software; you can redistribute it and/or modify it under
-- the terms of the GNU General Public License as published by the Free
-- Software Foundation; either version 2, or (at your option) any later
-- version.
--
-- GHDL is distributed in the hope that it will be useful, but WITHOUT ANY
-- WARRANTY; without even the implied warranty of MERCHANTABILITY or
-- FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
-- for more details.
--
-- You should have received a copy of the GNU General Public License
-- along with GHDL; see the file COPYING. If not, write to the Free
-- Software Foundation, 59 Temple Place - Suite 330, Boston, MA
-- 02111-1307, USA.
with PSL.Errors; use PSL.Errors;
with Types; use Types;
package body PSL.Subsets is
procedure Check_Simple (N : Node)
is
begin
case Get_Kind (N) is
when N_Not_Bool =>
if Get_Psl_Type (Get_Boolean (N)) /= Type_Boolean then
Error_Msg_Sem
("operand of a negation operator must be a boolean", N);
end if;
when N_Never =>
case Get_Psl_Type (Get_Property (N)) is
when Type_Sequence | Type_Boolean =>
null;
when others =>
Error_Msg_Sem ("operand of a 'never' operator must be "
& "a boolean or a sequence", N);
end case;
when N_Eventually =>
case Get_Psl_Type (Get_Property (N)) is
when Type_Sequence | Type_Boolean =>
null;
when others =>
Error_Msg_Sem ("operand of an 'eventually!' operator must be"
& " a boolean or a sequence", N);
end case;
when N_And_Bool =>
if Get_Psl_Type (Get_Left (N)) /= Type_Boolean then
Error_Msg_Sem ("left-hand side operand of logical 'and' must be"
& " a boolean", N);
end if;
when N_Or_Bool =>
if Get_Psl_Type (Get_Left (N)) /= Type_Boolean then
Error_Msg_Sem ("left-hand side operand of logical 'or' must be"
& " a boolean", N);
end if;
when N_Log_Imp_Prop =>
if Get_Psl_Type (Get_Left (N)) /= Type_Boolean then
Error_Msg_Sem ("left-hand side operand of logical '->' must be"
& " a boolean", N);
end if;
-- FIXME: <->
when N_Until =>
if not Get_Inclusive_Flag (N) then
if Get_Psl_Type (Get_Right (N)) /= Type_Boolean then
Error_Msg_Sem ("right-hand side of a non-overlapping "
& "'until*' operator must be a boolean", N);
end if;
else
if Get_Psl_Type (Get_Right (N)) /= Type_Boolean
or else Get_Psl_Type (Get_Left (N)) /= Type_Boolean
then
Error_Msg_Sem ("both operands of an overlapping 'until*'"
& " operator are boolean", N);
end if;
end if;
when N_Before =>
if Get_Psl_Type (Get_Right (N)) /= Type_Boolean
or else Get_Psl_Type (Get_Left (N)) /= Type_Boolean
then
Error_Msg_Sem ("both operands of a 'before*'"
& " operator are boolean", N);
end if;
when others =>
null;
end case;
-- Recursion.
case Get_Kind (N) is
when N_Error =>
null;
when N_Hdl_Mod_Name =>
null;
when N_Vunit
| N_Vmode
| N_Vprop =>
declare
Item : Node;
begin
Item := Get_Item_Chain (N);
while Item /= Null_Node loop
Check_Simple (Item);
Item := Get_Chain (Item);
end loop;
end;
when N_Name_Decl =>
null;
when N_Assert_Directive
| N_Property_Declaration =>
Check_Simple (Get_Property (N));
when N_Endpoint_Declaration
| N_Sequence_Declaration =>
Check_Simple (Get_Sequence (N));
when N_Clock_Event =>
Check_Simple (Get_Property (N));
Check_Simple (Get_Boolean (N));
when N_Always
| N_Never
| N_Eventually
| N_Strong =>
Check_Simple (Get_Property (N));
when N_Braced_SERE
| N_Clocked_SERE =>
Check_Simple (Get_SERE (N));
when N_Concat_SERE
| N_Fusion_SERE
| N_Within_SERE =>
Check_Simple (Get_Left (N));
Check_Simple (Get_Right (N));
when N_Name =>
null;
when N_Star_Repeat_Seq
| N_Goto_Repeat_Seq
| N_Equal_Repeat_Seq =>
declare
N2 : constant Node := Get_Sequence (N);
begin
if N2 /= Null_Node then
Check_Simple (N2);
end if;
end;
when N_Plus_Repeat_Seq =>
Check_Simple (Get_Sequence (N));
when N_Match_And_Seq
| N_And_Seq
| N_Or_Seq =>
Check_Simple (Get_Left (N));
Check_Simple (Get_Right (N));
when N_Imp_Seq
| N_Overlap_Imp_Seq =>
Check_Simple (Get_Sequence (N));
Check_Simple (Get_Property (N));
when N_Log_Imp_Prop
| N_Until
| N_Before
| N_Or_Prop
| N_And_Prop
| N_And_Bool
| N_Or_Bool
| N_Imp_Bool =>
Check_Simple (Get_Left (N));
Check_Simple (Get_Right (N));
when N_Next
| N_Next_A
| N_Next_E =>
Check_Simple (Get_Property (N));
when N_Next_Event
| N_Next_Event_A
| N_Next_Event_E
| N_Abort =>
Check_Simple (Get_Boolean (N));
Check_Simple (Get_Property (N));
when N_Not_Bool =>
Check_Simple (Get_Boolean (N));
when N_Const_Parameter
| N_Sequence_Parameter
| N_Boolean_Parameter
| N_Property_Parameter =>
null;
when N_Actual =>
null;
when N_Sequence_Instance
| N_Endpoint_Instance
| N_Property_Instance =>
null;
when N_True
| N_False
| N_Number
| N_EOS
| N_HDL_Expr =>
null;
end case;
end Check_Simple;
end PSL.Subsets;
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