-- Semantic analysis. -- Copyright (C) 2002, 2003, 2004, 2005 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 GCC; see the file COPYING. If not, write to the Free -- Software Foundation, 59 Temple Place - Suite 330, Boston, MA -- 02111-1307, USA. with Evaluation; use Evaluation; with Errorout; use Errorout; with Flags; with Types; use Types; with Iirs_Utils; use Iirs_Utils; with Sem_Names; use Sem_Names; with Sem_Expr; use Sem_Expr; with Iir_Chains; use Iir_Chains; with Xrefs; package body Sem_Assocs is -- Semantize all arguments of ASSOC_CHAIN -- Return TRUE if no error. function Sem_Actual_Of_Association_Chain (Assoc_Chain : Iir) return Boolean is Has_Named : Boolean; Ok : Boolean; Assoc : Iir; Res : Iir; Formal : Iir; begin -- Semantize all arguments -- OK is false if there is an error during semantic of one of the -- argument, but continue semantisation. Has_Named := False; Ok := True; Assoc := Assoc_Chain; while Assoc /= Null_Iir loop Formal := Get_Formal (Assoc); if Formal /= Null_Iir then Has_Named := True; -- FIXME: check FORMAL is well composed. elsif Has_Named then Error_Msg_Sem ("positional argument after named argument", Assoc); Ok := False; end if; if Get_Kind (Assoc) /= Iir_Kind_Association_Element_Open then Res := Sem_Expression_Ov (Get_Actual (Assoc), Null_Iir); if Res = Null_Iir then Ok := False; else Set_Actual (Assoc, Res); end if; end if; Assoc := Get_Chain (Assoc); end loop; return Ok; end Sem_Actual_Of_Association_Chain; function Get_Mode_Name (Mode : Iir_Mode) return String is begin case Mode is when Iir_Unknown_Mode => raise Internal_Error; when Iir_Linkage_Mode => return "linkage"; when Iir_Buffer_Mode => return "buffer"; when Iir_Out_Mode => return "out"; when Iir_Inout_Mode => return "inout"; when Iir_In_Mode => return "in"; end case; end Get_Mode_Name; procedure Check_Parameter_Association_Restriction (Inter : Iir; Base_Actual : Iir; Loc : Iir) is Act_Mode : Iir_Mode; For_Mode : Iir_Mode; begin Act_Mode := Get_Mode (Base_Actual); For_Mode := Get_Mode (Inter); case Get_Mode (Inter) is when Iir_In_Mode => if Act_Mode in Iir_In_Modes or Act_Mode = Iir_Buffer_Mode then return; end if; when Iir_Out_Mode => -- FIXME: should buffer also be accepted ? if Act_Mode in Iir_Out_Modes or Act_Mode = Iir_Buffer_Mode then return; end if; when Iir_Inout_Mode => if Act_Mode = Iir_Inout_Mode then return; end if; when others => Error_Kind ("check_parameter_association_restriction", Inter); end case; Error_Msg_Sem ("cannot associate an " & Get_Mode_Name (Act_Mode) & " object with " & Get_Mode_Name (For_Mode) & " " & Disp_Node (Inter), Loc); end Check_Parameter_Association_Restriction; procedure Check_Subprogram_Associations (Inter_Chain : Iir; Assoc_Chain : Iir) is Assoc : Iir; Formal : Iir; Formal_Inter : Iir; Actual : Iir; Prefix : Iir; Object : Iir; Inter : Iir; begin Assoc := Assoc_Chain; Inter := Inter_Chain; while Assoc /= Null_Iir loop Formal := Get_Formal (Assoc); if Formal = Null_Iir then -- Association by position. Formal_Inter := Inter; Inter := Get_Chain (Inter); else -- Association by name. Formal_Inter := Get_Base_Name (Formal); Inter := Null_Iir; end if; case Get_Kind (Assoc) is when Iir_Kind_Association_Element_Open => if Get_Default_Value (Formal_Inter) = Null_Iir then Error_Msg_Sem ("no parameter for " & Disp_Node (Formal_Inter), Assoc); end if; when Iir_Kind_Association_Element_By_Expression => Actual := Get_Actual (Assoc); Object := Name_To_Object (Actual); if Object /= Null_Iir then Prefix := Get_Object_Prefix (Object); else Prefix := Actual; end if; case Get_Kind (Formal_Inter) is when Iir_Kind_Signal_Interface_Declaration => -- LRM93 2.1.1 -- In a subprogram call, the actual designator -- associated with a formal parameter of class -- signal must be a signal. case Get_Kind (Prefix) is when Iir_Kind_Signal_Interface_Declaration | Iir_Kind_Signal_Declaration | Iir_Kind_Guard_Signal_Declaration | Iir_Kinds_Signal_Attribute => -- LRM93 2.1.1.2 -- If an actual signal is associated with -- a signal parameter of any mode, the actual -- must be denoted by a static signal name. if Get_Name_Staticness (Object) < Globally then Error_Msg_Sem ("actual signal must be a static name", Actual); else -- Inherit has_active_flag. Set_Has_Active_Flag (Prefix, Get_Has_Active_Flag (Formal_Inter)); end if; when others => Error_Msg_Sem ("signal parameter requires a signal expression", Assoc); end case; case Get_Kind (Prefix) is when Iir_Kind_Signal_Interface_Declaration => Check_Parameter_Association_Restriction (Formal_Inter, Prefix, Assoc); when Iir_Kind_Guard_Signal_Declaration => if Get_Mode (Formal_Inter) /= Iir_In_Mode then Error_Msg_Sem ("cannot associate a guard signal with " & Get_Mode_Name (Get_Mode (Formal_Inter)) & " " & Disp_Node (Formal_Inter), Assoc); end if; when Iir_Kinds_Signal_Attribute => if Get_Mode (Formal_Inter) /= Iir_In_Mode then Error_Msg_Sem ("cannot associate a signal attribute with " & Get_Mode_Name (Get_Mode (Formal_Inter)) & " " & Disp_Node (Formal_Inter), Assoc); end if; when others => null; end case; -- LRM 2.1.1.2 Signal parameters -- It is an error if a conversion function or type -- conversion appears in either the formal part or the -- actual part of an association element that associates -- an actual signal with a formal signal parameter. if Get_In_Conversion (Assoc) /= Null_Iir or Get_Out_Conversion (Assoc) /= Null_Iir then Error_Msg_Sem ("conversion are not allowed for " & "signal parameters", Assoc); end if; when Iir_Kind_Variable_Interface_Declaration => -- LRM93 2.1.1 -- The actual designator associated with a formal of -- class variable must be a variable. case Get_Kind (Prefix) is when Iir_Kind_Variable_Interface_Declaration => Check_Parameter_Association_Restriction (Formal_Inter, Prefix, Assoc); when Iir_Kind_Variable_Declaration | Iir_Kind_Dereference | Iir_Kind_Implicit_Dereference => null; when Iir_Kind_File_Interface_Declaration | Iir_Kind_File_Declaration => -- LRM87 4.3.1.4 -- Such an object is a member of the variable -- class of objects; if Flags.Vhdl_Std >= Vhdl_93 then Error_Msg_Sem ("in vhdl93, variable parameter " & "cannot be a file", Assoc); end if; when others => Error_Msg_Sem ("variable parameter must be a variable", Assoc); end case; when Iir_Kind_File_Interface_Declaration => -- LRM93 2.1.1 -- The actual designator associated with a formal -- of class file must be a file. case Get_Kind (Prefix) is when Iir_Kind_File_Interface_Declaration | Iir_Kind_File_Declaration => null; when Iir_Kind_Variable_Declaration | Iir_Kind_Variable_Interface_Declaration => if Flags.Vhdl_Std >= Vhdl_93 then Error_Msg_Sem ("in vhdl93, file parameter " & "must be a file", Assoc); end if; when others => Error_Msg_Sem ("file parameter must be a file", Assoc); end case; -- LRM 2.1.1.3 File parameters -- It is an error if an association element associates -- an actual with a formal parameter of a file type and -- that association element contains a conversion -- function or type conversion. if Get_In_Conversion (Assoc) /= Null_Iir or Get_Out_Conversion (Assoc) /= Null_Iir then Error_Msg_Sem ("conversion are not allowed for " & "file parameters", Assoc); end if; when Iir_Kind_Constant_Interface_Declaration => -- LRM93 2.1.1 -- The actual designator associated with a formal of -- class constant must be an expression. Check_Read (Actual); when others => Error_Kind ("check_subprogram_association(3)", Formal_Inter); end case; when Iir_Kind_Association_Element_By_Individual => null; when others => Error_Kind ("check_subprogram_associations", Assoc); end case; Assoc := Get_Chain (Assoc); end loop; end Check_Subprogram_Associations; -- Assocs_Right_Map (FORMAL_MODE, ACTUAL_MODE) is true iff it is allowed -- to associate a formal port of mode FORMAL_MODE with an actual port of -- mode ACTUAL_MODE. subtype Iir_Known_Mode is Iir_Mode range Iir_Linkage_Mode .. Iir_In_Mode; type Assocs_Right_Map is array (Iir_Known_Mode, Iir_Known_Mode) of Boolean; Vhdl93_Assocs_Map : constant Assocs_Right_Map := (Iir_Linkage_Mode => (others => True), Iir_Buffer_Mode => (Iir_Buffer_Mode => True, others => False), Iir_Out_Mode => (Iir_Out_Mode | Iir_Inout_Mode => True, others => False), Iir_Inout_Mode => (Iir_Inout_Mode => True, others => False), Iir_In_Mode => (Iir_In_Mode | Iir_Inout_Mode | Iir_Buffer_Mode => True, others => False)); Vhdl02_Assocs_Map : constant Assocs_Right_Map := (Iir_Linkage_Mode => (others => True), Iir_Buffer_Mode => (Iir_Out_Mode | Iir_Inout_Mode | Iir_Buffer_Mode => True, others => False), Iir_Out_Mode => (Iir_Out_Mode | Iir_Inout_Mode | Iir_Buffer_Mode => True, others => False), Iir_Inout_Mode => (Iir_Inout_Mode | Iir_Buffer_Mode => True, others => False), Iir_In_Mode => (Iir_In_Mode | Iir_Inout_Mode | Iir_Buffer_Mode => True, others => False)); -- Check for restrictions in LRM 1.1.1.2 -- Return FALSE in case of error. function Check_Port_Association_Restriction (Formal : Iir_Signal_Interface_Declaration; Actual : Iir_Signal_Interface_Declaration; Assoc : Iir) return Boolean is Fmode : Iir_Mode; Amode : Iir_Mode; begin Fmode := Get_Mode (Formal); Amode := Get_Mode (Actual); if Fmode = Iir_Unknown_Mode or Amode = Iir_Unknown_Mode then raise Internal_Error; end if; if Flags.Vhdl_Std < Vhdl_02 then if Vhdl93_Assocs_Map (Fmode, Amode) then return True; end if; else if Vhdl02_Assocs_Map (Fmode, Amode) then return True; end if; end if; Error_Msg_Sem ("cannot associate " & Get_Mode_Name (Fmode) & " " & Disp_Node (Formal) & " with actual port of mode " & Get_Mode_Name (Amode), Assoc); return False; end Check_Port_Association_Restriction; -- Handle indexed name -- FORMAL is the formal name to be handled. -- SUB_ASSOC is an association_by_individual in which the formal will be -- inserted. -- Update SUB_ASSOC so that it designates FORMAL. procedure Add_Individual_Assoc_Indexed_Name (Sub_Assoc : in out Iir; Formal : Iir) is Choice : Iir; Last_Choice : Iir; Index_List : Iir_List; Index : Iir; Nbr : Natural; begin -- Find element. Index_List := Get_Index_List (Formal); Nbr := Get_Nbr_Elements (Index_List); for I in 0 .. Nbr - 1 loop Index := Get_Nth_Element (Index_List, I); -- Evaluate index. Index := Eval_Expr (Index); Replace_Nth_Element (Index_List, I, Index); -- Find index in choice list. Last_Choice := Null_Iir; Choice := Get_Individual_Association_Chain (Sub_Assoc); while Choice /= Null_Iir loop case Get_Kind (Choice) is when Iir_Kind_Choice_By_Expression => if Eval_Pos (Get_Expression (Choice)) = Eval_Pos (Index) then goto Found; end if; when Iir_Kind_Choice_By_Range => if Eval_Int_In_Range (Eval_Pos (Index), Get_Expression (Choice)) then -- FIXME: overlap. raise Internal_Error; end if; when others => Error_Kind ("add_individual_assoc_index_name", Choice); end case; Last_Choice := Choice; Choice := Get_Chain (Choice); end loop; -- If not found, append it. Choice := Create_Iir (Iir_Kind_Choice_By_Expression); Set_Expression (Choice, Index); Location_Copy (Choice, Formal); if Last_Choice = Null_Iir then Set_Individual_Association_Chain (Sub_Assoc, Choice); else Set_Chain (Last_Choice, Choice); end if; << Found >> null; if I < Nbr - 1 then Sub_Assoc := Get_Associated (Choice); if Sub_Assoc = Null_Iir then Sub_Assoc := Create_Iir (Iir_Kind_Association_Element_By_Individual); Location_Copy (Sub_Assoc, Index); Set_Associated (Choice, Sub_Assoc); end if; else Sub_Assoc := Choice; end if; end loop; end Add_Individual_Assoc_Indexed_Name; procedure Add_Individual_Assoc_Slice_Name (Sub_Assoc : in out Iir; Formal : Iir) is Choice : Iir; Index : Iir; begin -- FIXME: handle cases such as param(5 to 6)(5) -- Find element. Index := Get_Suffix (Formal); -- Evaluate index. Index := Eval_Expr (Index); Set_Suffix (Formal, Index); Choice := Create_Iir (Iir_Kind_Choice_By_Range); Location_Copy (Choice, Formal); Set_Expression (Choice, Index); Set_Chain (Choice, Get_Individual_Association_Chain (Sub_Assoc)); Set_Individual_Association_Chain (Sub_Assoc, Choice); Sub_Assoc := Choice; end Add_Individual_Assoc_Slice_Name; procedure Add_Individual_Assoc_Selected_Name (Sub_Assoc : in out Iir; Formal : Iir) is Choice : Iir; begin Choice := Create_Iir (Iir_Kind_Choice_By_Name); Location_Copy (Choice, Formal); Set_Name (Choice, Get_Selected_Element (Formal)); Set_Chain (Choice, Get_Individual_Association_Chain (Sub_Assoc)); Set_Individual_Association_Chain (Sub_Assoc, Choice); Sub_Assoc := Choice; end Add_Individual_Assoc_Selected_Name; procedure Add_Individual_Association_1 (Iassoc : in out Iir; Formal : Iir) is Sub : Iir; Formal_Object : Iir; begin Formal_Object := Name_To_Object (Formal); case Get_Kind (Formal_Object) is when Iir_Kind_Indexed_Name | Iir_Kind_Slice_Name | Iir_Kind_Selected_Element => Add_Individual_Association_1 (Iassoc, Get_Prefix (Formal_Object)); when Iir_Kinds_Interface_Declaration => return; when others => Error_Kind ("add_individual_association_1", Formal); end case; case Get_Kind (Iassoc) is when Iir_Kind_Association_Element_By_Individual => null; when Iir_Kind_Choice_By_Expression => Sub := Get_Associated (Iassoc); if Sub = Null_Iir then Sub := Create_Iir (Iir_Kind_Association_Element_By_Individual); Location_Copy (Sub, Formal); Set_Formal (Sub, Iassoc); Iassoc := Sub; else case Get_Kind (Sub) is when Iir_Kind_Association_Element_By_Individual => Iassoc := Sub; when others => Error_Msg_Sem ("individual association of " & Disp_Node (Get_Associated_Formal (Iassoc)) & " conflicts with that at " & Disp_Location (Sub), Formal); return; end case; end if; when others => Error_Kind ("add_individual_association_1(2)", Iassoc); end case; case Get_Kind (Formal_Object) is when Iir_Kind_Indexed_Name => Add_Individual_Assoc_Indexed_Name (Iassoc, Formal_Object); when Iir_Kind_Slice_Name => Add_Individual_Assoc_Slice_Name (Iassoc, Formal_Object); when Iir_Kind_Selected_Element => Add_Individual_Assoc_Selected_Name (Iassoc, Formal_Object); when others => Error_Kind ("add_individual_association_1(3)", Formal); end case; end Add_Individual_Association_1; procedure Add_Individual_Association (Iassoc : Iir; Assoc : Iir) is Formal : Iir; Iass : Iir; Prev : Iir; begin Formal := Get_Formal (Assoc); Iass := Iassoc; Add_Individual_Association_1 (Iass, Formal); Prev := Get_Associated (Iass); if Prev /= Null_Iir then Error_Msg_Sem ("individual association of " & Disp_Node (Get_Base_Name (Formal)) & " conflicts with that at " & Disp_Location (Prev), Assoc); else Set_Associated (Iass, Assoc); end if; end Add_Individual_Association; procedure Finish_Individual_Assoc_Array_Subtype (Assoc : Iir; Atype : Iir) is Index_Tlist : Iir_List; Index_Type : Iir; Low, High : Iir; Chain : Iir; begin Index_Tlist := Get_Index_Subtype_List (Atype); for I in Natural loop Index_Type := Get_Nth_Element (Index_Tlist, I); exit when Index_Type = Null_Iir; Chain := Get_Individual_Association_Chain (Assoc); Sem_Choices_Range (Chain, Index_Type, False, Get_Location (Assoc), Low, High); Set_Individual_Association_Chain (Assoc, Chain); end loop; end Finish_Individual_Assoc_Array_Subtype; procedure Finish_Individual_Assoc_Array (Actual : Iir; Assoc : Iir; Dim : Natural) is Actual_Type : Iir; Actual_Index : Iir; Base_Type : Iir; Base_Index : Iir; Low, High : Iir; Chain : Iir; begin Actual_Type := Get_Actual_Type (Actual); Actual_Index := Get_Nth_Element (Get_Index_Subtype_List (Actual_Type), Dim - 1); if Actual_Index /= Null_Iir then Base_Index := Actual_Index; else Base_Type := Get_Base_Type (Actual_Type); Base_Index := Get_Nth_Element (Get_Index_Subtype_List (Base_Type), Dim - 1); end if; Chain := Get_Individual_Association_Chain (Assoc); Sem_Choices_Range (Chain, Base_Index, True, Get_Location (Assoc), Low, High); Set_Individual_Association_Chain (Assoc, Chain); if Actual_Index = Null_Iir then declare Index_Constraint : Iir; Index_Subtype_Constraint : Iir; begin -- Create an index subtype. case Get_Kind (Base_Index) is when Iir_Kind_Integer_Subtype_Definition => Actual_Index := Create_Iir (Iir_Kind_Integer_Subtype_Definition); when Iir_Kind_Enumeration_Type_Definition | Iir_Kind_Enumeration_Subtype_Definition => Actual_Index := Create_Iir (Iir_Kind_Enumeration_Subtype_Definition); when others => Error_Kind ("finish_individual_assoc_array", Base_Index); end case; Location_Copy (Actual_Index, Actual); Set_Base_Type (Actual_Index, Get_Base_Type (Base_Index)); Index_Constraint := Get_Range_Constraint (Base_Index); Index_Subtype_Constraint := Create_Iir (Iir_Kind_Range_Expression); Location_Copy (Index_Subtype_Constraint, Actual); Set_Range_Constraint (Actual_Index, Index_Subtype_Constraint); Set_Type_Staticness (Actual_Index, Locally); Set_Direction (Index_Subtype_Constraint, Get_Direction (Index_Constraint)); case Get_Direction (Index_Constraint) is when Iir_To => Set_Left_Limit (Index_Subtype_Constraint, Low); Set_Right_Limit (Index_Subtype_Constraint, High); when Iir_Downto => Set_Left_Limit (Index_Subtype_Constraint, High); Set_Right_Limit (Index_Subtype_Constraint, Low); end case; Set_Expr_Staticness (Index_Subtype_Constraint, Locally); Append_Element (Get_Index_Subtype_List (Actual_Type), Actual_Index); end; else declare Act_High, Act_Low : Iir; begin Get_Low_High_Limit (Get_Range_Constraint (Actual_Type), Act_Low, Act_High); if Eval_Pos (Act_Low) /= Eval_Pos (Low) or Eval_Pos (Act_High) /= Eval_Pos (High) then Error_Msg_Sem ("indexes of individual association mismatch", Assoc); end if; end; end if; end Finish_Individual_Assoc_Array; procedure Finish_Individual_Assoc_Record (Assoc : Iir; Atype : Iir) is Base_Type : Iir_Record_Type_Definition; Matches : Iir_Array_Acc; Ch : Iir; Pos : Natural; Rec_El : Iir; begin Base_Type := Get_Base_Type (Atype); Matches := new Iir_Array (0 .. Natural (Get_Number_Element_Declaration (Base_Type)) - 1); Matches.all := (others => Null_Iir); Ch := Get_Individual_Association_Chain (Assoc); while Ch /= Null_Iir loop Rec_El := Get_Name (Ch); Pos := Natural (Get_Element_Position (Rec_El)); if Matches (Pos) /= Null_Iir then Error_Msg_Sem ("individual " & Disp_Node (Rec_El) & " already associated at " & Disp_Location (Matches (Pos)), Ch); else Matches (Pos) := Ch; end if; Ch := Get_Chain (Ch); end loop; Rec_El := Get_Element_Declaration_Chain (Base_Type); for I in Matches'Range loop if Matches (I) = Null_Iir then Error_Msg_Sem (Disp_Node (Rec_El) & " not associated", Assoc); end if; Rec_El := Get_Chain (Rec_El); end loop; Set_Actual_Type (Assoc, Atype); end Finish_Individual_Assoc_Record; -- Called by sem_individual_association to finish the semantization of -- individual association ASSOC. procedure Finish_Individual_Association (Assoc : Iir) is Formal : Iir; Atype : Iir; begin -- Guard. if Assoc = Null_Iir then return; end if; Formal := Get_Associated_Formal (Assoc); Atype := Get_Type (Formal); case Get_Kind (Atype) is when Iir_Kind_Array_Subtype_Definition => Finish_Individual_Assoc_Array_Subtype (Assoc, Atype); when Iir_Kind_Array_Type_Definition | Iir_Kind_Unconstrained_Array_Subtype_Definition => Set_Actual_Type (Assoc, Create_Array_Subtype (Atype, Get_Location (Assoc))); Finish_Individual_Assoc_Array (Assoc, Assoc, 1); when Iir_Kind_Record_Type_Definition | Iir_Kind_Record_Subtype_Definition => Finish_Individual_Assoc_Record (Assoc, Atype); when others => Error_Kind ("finish_individual_association", Atype); end case; end Finish_Individual_Association; -- Sem individual associations of ASSOCS: -- Add an Iir_Kind_Association_Element_By_Individual before each -- group of individual association for the same formal, and call -- Finish_Individual_Association with each of these added nodes. procedure Sem_Individual_Association (Assoc_Chain : in out Iir) is Assoc : Iir; Prev_Assoc : Iir; Iassoc : Iir_Association_Element_By_Individual; Cur_Iface : Iir; Formal : Iir; begin Iassoc := Null_Iir; Cur_Iface := Null_Iir; Prev_Assoc := Null_Iir; Assoc := Assoc_Chain; while Assoc /= Null_Iir loop Formal := Get_Formal (Assoc); if Formal /= Null_Iir then Formal := Get_Base_Name (Formal); end if; if Formal = Null_Iir or else Formal /= Cur_Iface then -- New formal name, sem the current assoc. Finish_Individual_Association (Iassoc); Cur_Iface := Formal; Iassoc := Null_Iir; end if; if Get_Whole_Association_Flag (Assoc) = False then -- New individual association. if Iassoc = Null_Iir then Iassoc := Create_Iir (Iir_Kind_Association_Element_By_Individual); Location_Copy (Iassoc, Assoc); if Cur_Iface = Null_Iir then raise Internal_Error; end if; Set_Formal (Iassoc, Cur_Iface); -- Insert IASSOC. if Prev_Assoc = Null_Iir then Assoc_Chain := Iassoc; else Set_Chain (Prev_Assoc, Iassoc); end if; Set_Chain (Iassoc, Assoc); end if; Add_Individual_Association (Iassoc, Assoc); end if; Prev_Assoc := Assoc; Assoc := Get_Chain (Assoc); end loop; -- There is maybe a remaining iassoc. Finish_Individual_Association (Iassoc); end Sem_Individual_Association; -- EXPR is a formal or actual expression. -- Extract conversion function CONV from EXPR, if: -- * argument of the function is of type ARG_TYPE. -- * return type of the function is RES_TYPE if RES_TYPE /= Null_Iir -- or any type if RES_TYPE = Null_Iir. -- procedure Sem_Conversion (Expr : in out Iir; Conv : out Iir) -- is -- Assoc : Iir; -- begin -- Conv := Null_Iir; -- case Get_Kind (Expr) is -- when Iir_Kind_Parenthesis_Name => -- raise Internal_Error; -- when Iir_Kind_Function_Call => -- Conv := Get_Implementation (Expr); -- Assoc := Get_Parameter_Association_Chain (Expr); -- Expr := Get_Actual (Assoc); -- Free_Iir (Assoc); -- Set_Use_Flag (Conv, True); -- when Iir_Kind_Type_Conversion => -- Assoc := Get_Expression (Expr); -- Conv := Expr; -- Expr := Assoc; -- --Set_Expression (Conv, Null_Iir); -- when others => -- return; -- end case; -- end Sem_Conversion; function Is_Conversion_Function (Assoc_Chain : Iir) return Boolean is begin -- [...] whose single parameter of the function [...] if not Is_Chain_Length_One (Assoc_Chain) then return False; end if; if Get_Kind (Assoc_Chain) /= Iir_Kind_Association_Element_By_Expression then return False; end if; -- FIXME: unfortunatly, the formal may already be set with the -- interface. -- if Get_Formal (Assoc_Chain) /= Null_Iir then -- return Null_Iir; -- end if; return True; end Is_Conversion_Function; function Is_Expanded_Name (Name : Iir) return Boolean is Pfx : Iir; begin Pfx := Name; loop case Get_Kind (Pfx) is when Iir_Kind_Simple_Name => return True; when Iir_Kind_Selected_Name => Pfx := Get_Prefix (Pfx); when others => return False; end case; end loop; end Is_Expanded_Name; -- Return TRUE iff FUNC is valid as a conversion function/type. function Is_Valid_Conversion (Func : Iir) return Boolean is begin case Get_Kind (Func) is when Iir_Kinds_Function_Declaration => if not Is_Chain_Length_One (Get_Interface_Declaration_Chain (Func)) then return False; end if; when Iir_Kind_Type_Declaration | Iir_Kind_Subtype_Declaration => if Flags.Vhdl_Std = Vhdl_87 then return False; end if; when others => return False; end case; return True; end Is_Valid_Conversion; function Extract_Type_Of_Conversions (Convs : Iir) return Iir is Res_List : Iir_List; Ov_List : Iir_List; El : Iir; begin if not Is_Overload_List (Convs) then if Is_Valid_Conversion (Convs) then return Get_Type (Convs); else return Null_Iir; end if; else Ov_List := Get_Overload_List (Convs); Res_List := Create_Iir_List; for I in Natural loop El := Get_Nth_Element (Ov_List, I); exit when El = Null_Iir; if Is_Valid_Conversion (El) then Add_Element (Res_List, Get_Type (El)); end if; end loop; return Simplify_Overload_List (Res_List); end if; end Extract_Type_Of_Conversions; -- ASSOC is an association element not semantized and whose formal is a -- parenthesis name. Try to extract a conversion function/type. In case -- of success, return a new association element. In case of failure, -- return NULL_IIR. function Sem_Formal_Conversion (Assoc : Iir) return Iir is Formal : Iir; Assoc_Chain : Iir; Res : Iir; Conv : Iir; Name : Iir; Conv_Func : Iir; Conv_Type : Iir; begin Formal := Get_Formal (Assoc); Assoc_Chain := Get_Association_Chain (Formal); if not Is_Conversion_Function (Assoc_Chain) then return Null_Iir; end if; -- Both the conversion function and the formal name must be names. Conv := Get_Prefix (Formal); -- FIXME: what about operator names (such as "not"). if Get_Kind (Conv) /= Iir_Kind_Simple_Name and then not Is_Expanded_Name (Conv) then return Null_Iir; end if; Name := Get_Actual (Assoc_Chain); if Get_Kind (Name) not in Iir_Kinds_Name then return Null_Iir; end if; Sem_Name_Soft (Conv); Conv_Func := Get_Named_Entity (Conv); if Get_Kind (Conv_Func) = Iir_Kind_Error then Conv_Type := Null_Iir; else Conv_Type := Extract_Type_Of_Conversions (Conv_Func); end if; if Conv_Type = Null_Iir then Sem_Name_Clean (Conv); return Null_Iir; end if; Set_Type (Conv, Conv_Type); -- Create a new association with a conversion function. Res := Create_Iir (Iir_Kind_Association_Element_By_Expression); Set_Out_Conversion (Res, Conv); Set_Formal (Res, Name); Set_Actual (Res, Get_Actual (Assoc)); return Res; end Sem_Formal_Conversion; -- NAME is the formal name of an association, without any conversion -- function or type. -- Try to semantize NAME with INTERFACE. -- In case of success, set PREFIX to the most prefix of NAME and NAME_TYPE -- to the type of NAME. -- In case of failure, set NAME_TYPE to NULL_IIR. procedure Sem_Formal_Name (Name : Iir; Inter : Iir; Prefix : out Iir; Name_Type : out Iir) is Base_Type : Iir; Rec_El : Iir; begin case Get_Kind (Name) is when Iir_Kind_Simple_Name => if Get_Identifier (Name) = Get_Identifier (Inter) then Prefix := Name; Name_Type := Get_Type (Inter); else Name_Type := Null_Iir; end if; return; when Iir_Kind_Selected_Name => Sem_Formal_Name (Get_Prefix (Name), Inter, Prefix, Name_Type); if Name_Type = Null_Iir then return; end if; Base_Type := Get_Base_Type (Name_Type); if Get_Kind (Base_Type) /= Iir_Kind_Record_Type_Definition then Name_Type := Null_Iir; return; end if; Rec_El := Find_Name_In_Chain (Get_Element_Declaration_Chain (Base_Type), Get_Suffix_Identifier (Name)); if Rec_El = Null_Iir then Name_Type := Null_Iir; return; end if; Name_Type := Get_Type (Rec_El); return; when Iir_Kind_Parenthesis_Name => -- More difficult: slice or indexed array. Sem_Formal_Name (Get_Prefix (Name), Inter, Prefix, Name_Type); if Name_Type = Null_Iir then return; end if; Base_Type := Get_Base_Type (Name_Type); if Get_Kind (Base_Type) /= Iir_Kind_Array_Type_Definition then Name_Type := Null_Iir; return; end if; declare Chain : Iir; Index_List : Iir_List; Idx : Iir; begin Chain := Get_Association_Chain (Name); Index_List := Get_Index_Subtype_List (Base_Type); -- Check for matching length. if Get_Chain_Length (Chain) /= Get_Nbr_Elements (Index_List) then Name_Type := Null_Iir; return; end if; if Get_Kind (Chain) /= Iir_Kind_Association_Element_By_Expression then Name_Type := Null_Iir; return; end if; Idx := Get_Actual (Chain); if (not Is_Chain_Length_One (Chain)) or else (Get_Kind (Idx) /= Iir_Kind_Range_Expression and then not Is_Range_Attribute_Name (Idx)) -- FIXME: what about subtype ! then -- Indexed name. Name_Type := Get_Element_Subtype (Base_Type); return; end if; -- Slice. return; end; when others => Error_Kind ("sem_formal_name", Name); end case; end Sem_Formal_Name; -- Return a type or a list of types for a formal expression FORMAL -- corresponding to INTERFACE. Possible cases are: -- * FORMAL is the simple name with the same identifier as INTERFACE, -- FORMAL_TYPE is set to the type of INTERFACE and CONV_TYPE is set -- to NULL_IIR. -- * FORMAL is a selected, indexed or slice name whose extreme prefix is -- a simple name with the same identifier as INTERFACE, FORMAL_TYPE -- is set to the type of the name, and CONV_TYPE is set to NULL_IIR. -- * FORMAL is a function call, whose only argument is an -- association_element_by_expression, whose actual is a name -- whose prefix is the same identifier as INTERFACE (note, since FORMAL -- is not semantized, this is parenthesis name), CONV_TYPE is set to -- the type or list of type of return type of conversion functions and -- FORMAL_TYPE is set to the type of the name. -- * otherwise, FORMAL cannot match INTERFACE and both FORMAL_TYPE and -- CONV_TYPE are set to NULL_IIR. -- If FINISH is true, the simple name is replaced by INTERFACE. type Param_Assoc_Type is (None, Open, Individual, Whole); function Sem_Formal (Formal : Iir; Inter : Iir) return Param_Assoc_Type is Prefix : Iir; Formal_Type : Iir; begin case Get_Kind (Formal) is when Iir_Kind_Simple_Name => -- Certainly the most common case: FORMAL_NAME => VAL. -- It is also the easiest. So, handle it completly now. if Get_Identifier (Formal) = Get_Identifier (Inter) then Formal_Type := Get_Type (Inter); Set_Named_Entity (Formal, Inter); Set_Type (Formal, Formal_Type); --Xrefs.Xref_Name (Formal); return Whole; end if; return None; when Iir_Kind_Selected_Name | Iir_Kind_Slice_Name | Iir_Kind_Parenthesis_Name => null; when others => -- Should have been caught by sem_association_list. Error_Kind ("sem_formal", Formal); end case; -- Check for a sub-element. Sem_Formal_Name (Formal, Inter, Prefix, Formal_Type); if Formal_Type /= Null_Iir then Set_Type (Formal, Formal_Type); Set_Named_Entity (Prefix, Inter); return Individual; else return None; end if; end Sem_Formal; function Is_Valid_Conversion (Func : Iir; Res_Base_Type : Iir; Param_Base_Type : Iir) return Boolean is R_Type : Iir; P_Type : Iir; begin case Get_Kind (Func) is when Iir_Kinds_Function_Declaration => R_Type := Get_Type (Func); P_Type := Get_Type (Get_Interface_Declaration_Chain (Func)); if Get_Base_Type (R_Type) = Res_Base_Type and then Get_Base_Type (P_Type) = Param_Base_Type then return True; else return False; end if; when Iir_Kind_Type_Declaration | Iir_Kind_Subtype_Declaration => R_Type := Get_Type (Func); if Get_Base_Type (R_Type) = Res_Base_Type and then Are_Types_Closely_Related (R_Type, Param_Base_Type) then return True; else return False; end if; when Iir_Kind_Function_Call => return Is_Valid_Conversion (Get_Implementation (Func), Res_Base_Type, Param_Base_Type); when Iir_Kind_Type_Conversion => return Is_Valid_Conversion (Get_Type_Mark (Func), Res_Base_Type, Param_Base_Type); when others => Error_Kind ("is_valid_conversion(2)", Func); end case; end Is_Valid_Conversion; function Extract_Conversion (Conv : Iir; Res_Type : Iir; Param_Type : Iir; Loc : Iir) return Iir is List : Iir_List; Res_Base_Type : Iir; Param_Base_Type : Iir; El : Iir; Res : Iir; begin Res_Base_Type := Get_Base_Type (Res_Type); if Param_Type = Null_Iir then -- In case of error. return Null_Iir; end if; Param_Base_Type := Get_Base_Type (Param_Type); if Is_Overload_List (Conv) then List := Get_Overload_List (Conv); Res := Null_Iir; for I in Natural loop El := Get_Nth_Element (List, I); exit when El = Null_Iir; if Is_Valid_Conversion (El, Res_Base_Type, Param_Base_Type) then if Res /= Null_Iir then raise Internal_Error; end if; Free_Iir (Conv); Res := El; end if; end loop; else if Is_Valid_Conversion (Conv, Res_Base_Type, Param_Base_Type) then Res := Conv; else Res := Null_Iir; Error_Msg_Sem ("conversion function or type does not match", Loc); end if; end if; return Res; end Extract_Conversion; function Extract_In_Conversion (Conv : Iir; Res_Type : Iir; Param_Type : Iir) return Iir is Func : Iir; begin if Conv = Null_Iir then return Null_Iir; end if; Func := Extract_Conversion (Conv, Res_Type, Param_Type, Conv); if Func = Null_Iir then return Null_Iir; end if; case Get_Kind (Func) is when Iir_Kind_Function_Call | Iir_Kind_Type_Conversion => return Func; when others => Error_Kind ("extract_in_conversion", Func); end case; end Extract_In_Conversion; function Extract_Out_Conversion (Conv : Iir; Res_Type : Iir; Param_Type : Iir) return Iir is Func : Iir; Res : Iir; begin if Conv = Null_Iir then return Null_Iir; end if; Func := Extract_Conversion (Get_Named_Entity (Conv), Res_Type, Param_Type, Conv); if Func = Null_Iir then return Null_Iir; end if; case Get_Kind (Func) is when Iir_Kinds_Function_Declaration => Res := Create_Iir (Iir_Kind_Function_Call); Location_Copy (Res, Conv); Set_Implementation (Res, Func); Set_Base_Name (Res, Res); Set_Parameter_Association_Chain (Res, Null_Iir); Set_Type (Res, Get_Return_Type (Func)); Set_Expr_Staticness (Res, None); Set_Use_Flag (Func, True); when Iir_Kind_Subtype_Declaration | Iir_Kind_Type_Declaration => Res := Create_Iir (Iir_Kind_Type_Conversion); Location_Copy (Res, Conv); Set_Type_Mark (Res, Func); Set_Type (Res, Get_Type (Func)); Set_Expression (Res, Null_Iir); Set_Expr_Staticness (Res, None); when others => Error_Kind ("extract_out_conversion", Res); end case; Set_Named_Entity (Conv, Res); Xrefs.Xref_Name (Conv); return Res; end Extract_Out_Conversion; -- Associate ASSOC with interface INTERFACE -- This sets RES. procedure Sem_Association (Assoc : Iir; Inter : Iir; Finish : Boolean; Match : out Boolean) is Formal : Iir; Formal_Type : Iir; Actual: Iir; Actual_Types : Iir; Out_Conv, In_Conv : Iir; Expr : Iir; Res_Type : Iir; Assoc_Kind : Param_Assoc_Type; begin Formal := Get_Formal (Assoc); -- Handle open association. if Get_Kind (Assoc) = Iir_Kind_Association_Element_Open then if Formal /= Null_Iir then Assoc_Kind := Sem_Formal (Formal, Inter); if Assoc_Kind = None then Match := False; return; end if; Set_Whole_Association_Flag (Assoc, Assoc_Kind = Whole); if Finish then Set_Type (Formal, Null_Iir); Sem_Name (Formal, False); Expr := Get_Named_Entity (Formal); if Get_Kind (Expr) = Iir_Kind_Error then Match := False; return; end if; -- LRM 4.3.3.2 Associations lists -- It is an error if an actual of open is associated with a -- formal that is associated individually. if Assoc_Kind = Individual then Error_Msg_Sem ("cannot associate individually with open", Assoc); end if; Xrefs.Xref_Name (Formal); Set_Formal (Assoc, Expr); end if; else Set_Whole_Association_Flag (Assoc, True); end if; Match := True; return; end if; -- Pre-semantize formal and extract out conversion. if Formal /= Null_Iir then Assoc_Kind := Sem_Formal (Formal, Inter); if Assoc_Kind = None then Match := False; return; end if; Set_Whole_Association_Flag (Assoc, Assoc_Kind = Whole); Formal := Get_Formal (Assoc); Out_Conv := Get_Out_Conversion (Assoc); else Set_Whole_Association_Flag (Assoc, True); Out_Conv := Null_Iir; Formal := Inter; end if; Formal_Type := Get_Type (Formal); -- Extract conversion from actual. Actual := Get_Actual (Assoc); Actual_Types := Get_Type (Actual); In_Conv := Null_Iir; if Actual_Types = Null_Iir then Match := False; return; end if; if Get_Kind (Inter) /= Iir_Kind_Constant_Interface_Declaration then case Get_Kind (Actual) is when Iir_Kind_Function_Call => Expr := Get_Parameter_Association_Chain (Actual); if Is_Conversion_Function (Expr) then In_Conv := Actual; Actual := Get_Actual (Expr); end if; when Iir_Kind_Type_Conversion => if Flags.Vhdl_Std > Vhdl_87 then In_Conv := Actual; Actual := Get_Expression (Actual); end if; when others => null; end case; Actual_Types := Get_Type (Actual); end if; -- 4 cases: F:out_conv, G:in_conv. -- A => B type of A = type of B -- F(A) => B type of B = type of F -- A => G(B) type of A = type of G -- F(A) => G(B) type of B = type of F, type of A = type of G if Out_Conv = Null_Iir and then In_Conv = Null_Iir then Match := Compatibility_Types (Formal_Type, Actual_Types); else Match := True; if In_Conv /= Null_Iir then if not Compatibility_Types (Formal_Type, Get_Type (In_Conv)) then Match := False; end if; end if; if Out_Conv /= Null_Iir then if not Compatibility_Types (Get_Type (Out_Conv), Actual_Types) then Match := False; end if; end if; end if; if not Match then if Finish then Error_Msg_Sem ("can't associate " & Disp_Node (Actual) & " with " & Disp_Node (Inter), Assoc); Error_Msg_Sem ("(type of " & Disp_Node (Actual) & " is " & Disp_Type_Of (Actual) & ")", Assoc); Error_Msg_Sem ("(type of " & Disp_Node (Inter) & " is " & Disp_Type_Of (Inter) & ")", Inter); end if; return; end if; if not Finish then return; end if; if Out_Conv = Null_Iir and then In_Conv = Null_Iir then Res_Type := Formal_Type; else if Out_Conv /= Null_Iir then Res_Type := Search_Compatible_Type (Get_Type (Out_Conv), Actual_Types); else Res_Type := Actual_Types; end if; if In_Conv /= Null_Iir then In_Conv := Extract_In_Conversion (In_Conv, Formal_Type, Res_Type); end if; if Out_Conv /= Null_Iir then Out_Conv := Extract_Out_Conversion (Out_Conv, Res_Type, Formal_Type); end if; end if; if Res_Type = Null_Iir then -- In case of error, do not go farther. Match := False; return; end if; -- Semantize formal. if Get_Formal (Assoc) /= Null_Iir then Set_Type (Formal, Null_Iir); Sem_Name (Formal, False); Expr := Get_Named_Entity (Formal); if Get_Kind (Expr) = Iir_Kind_Error then return; end if; Xrefs.Xref_Name (Formal); Free_Name (Formal); Set_Formal (Assoc, Expr); Formal_Type := Get_Type (Expr); if Out_Conv = Null_Iir and In_Conv = Null_Iir then Res_Type := Formal_Type; end if; end if; Set_Out_Conversion (Assoc, Out_Conv); Set_In_Conversion (Assoc, In_Conv); Set_Actual (Assoc, Actual); -- Semantize actual. Expr := Sem_Expression (Actual, Res_Type); if Expr /= Null_Iir then Expr := Eval_Expr_If_Static (Expr); Set_Actual (Assoc, Expr); if In_Conv = Null_Iir and then Out_Conv = Null_Iir then if not Check_Implicit_Conversion (Formal_Type, Expr) then Error_Msg_Sem ("actual length does not match formal length", Assoc); end if; end if; end if; end Sem_Association; procedure Sem_Association_Chain (Interface_Chain : Iir; Assoc_Chain: in out Iir; Finish: Boolean; Missing : Missing_Type; Loc : Iir; Match : out Boolean) is -- Set POS and INTERFACE to *the* matching interface if any of ASSOC. procedure Search_Interface (Assoc : Iir; Inter : out Iir; Pos : out Integer) is I_Match : Boolean; begin Inter := Interface_Chain; Pos := 0; while Inter /= Null_Iir loop -- Formal assoc is not necessarily a simple name, it may -- be a conversion function, or even an indexed or -- selected name. Sem_Association (Assoc, Inter, False, I_Match); if I_Match then return; end if; Inter := Get_Chain (Inter); Pos := Pos + 1; end loop; end Search_Interface; Assoc: Iir; Inter: Iir; type Bool_Array is array (Natural range <>) of Param_Assoc_Type; Nbr_Arg: constant Natural := Get_Chain_Length (Interface_Chain); Arg_Matched: Bool_Array (0 .. Nbr_Arg - 1) := (others => None); Last_Individual : Iir; Has_Individual : Boolean; Pos : Integer; Formal : Iir; Interface_1 : Iir; Pos_1 : Integer; Assoc_1 : Iir; begin Match := True; Has_Individual := False; -- Loop on every assoc element, try to match it. Inter := Interface_Chain; Last_Individual := Null_Iir; Pos := 0; Assoc := Assoc_Chain; while Assoc /= Null_Iir loop Formal := Get_Formal (Assoc); if Formal = Null_Iir then -- Positional argument. if Pos < 0 then -- Positional after named argument. Already caught by -- Sem_Actual_Of_Association_Chain (because it is called only -- once, while sem_association_chain may be called several -- times). Match := False; return; end if; -- Try to match actual of ASSOC with the interface. if Inter = Null_Iir then if Finish then Error_Msg_Sem ("too many arguments for " & Disp_Node (Loc), Assoc); end if; Match := False; return; end if; Sem_Association (Assoc, Inter, Finish, Match); if not Match then return; end if; if Get_Kind (Assoc) = Iir_Kind_Association_Element_Open then Arg_Matched (Pos) := Open; else Arg_Matched (Pos) := Whole; end if; Set_Whole_Association_Flag (Assoc, True); Inter := Get_Chain (Inter); Pos := Pos + 1; else -- FIXME: directly search the formal if finish is true. -- Find the Interface. case Get_Kind (Formal) is when Iir_Kind_Parenthesis_Name => Assoc_1 := Sem_Formal_Conversion (Assoc); if Assoc_1 /= Null_Iir then Search_Interface (Assoc_1, Interface_1, Pos_1); -- LRM 4.3.2.2 Association Lists -- The formal part of a named element association may be -- in the form of a function call, [...], if and only -- if the mode of the formal is OUT, INOUT, BUFFER, or -- LINKAGE, and the actual is not OPEN. if Interface_1 = Null_Iir or else Get_Mode (Interface_1) = Iir_In_Mode then Sem_Name_Clean (Get_Out_Conversion (Assoc_1)); Free_Iir (Assoc_1); Assoc_1 := Null_Iir; end if; end if; Search_Interface (Assoc, Inter, Pos); if Inter = Null_Iir then if Assoc_1 /= Null_Iir then Inter := Interface_1; Pos := Pos_1; Set_Formal (Assoc, Get_Formal (Assoc_1)); Set_Out_Conversion (Assoc, Get_Out_Conversion (Assoc_1)); Set_Whole_Association_Flag (Assoc, Get_Whole_Association_Flag (Assoc_1)); Free_Iir (Assoc_1); end if; else if Assoc_1 /= Null_Iir then raise Internal_Error; end if; end if; when others => Search_Interface (Assoc, Inter, Pos); end case; if Inter /= Null_Iir then if Get_Whole_Association_Flag (Assoc) then -- Whole association. Last_Individual := Null_Iir; if Arg_Matched (Pos) = None then if Get_Kind (Assoc) = Iir_Kind_Association_Element_Open then Arg_Matched (Pos) := Open; else Arg_Matched (Pos) := Whole; end if; else if Finish then Error_Msg_Sem (Disp_Node (Inter) & " already associated", Assoc); Match := False; return; end if; end if; else -- Individual association. Has_Individual := True; if Arg_Matched (Pos) /= Whole then if Finish and then Arg_Matched (Pos) = Individual and then Last_Individual /= Inter then Error_Msg_Sem ("non consecutive individual association for " & Disp_Node (Inter), Assoc); Match := False; return; end if; Last_Individual := Inter; Arg_Matched (Pos) := Individual; else if Finish then Error_Msg_Sem (Disp_Node (Inter) & " already associated", Assoc); Match := False; return; end if; end if; end if; if Finish then Sem_Association (Assoc, Inter, True, Match); -- MATCH can be false du to errors. end if; else -- Not found. if Finish then -- FIXME: display the name of subprg or component/entity. -- FIXME: fetch the interface (for parenthesis_name). Error_Msg_Sem ("no interface for " & Disp_Node (Get_Formal (Assoc)) & " in association", Assoc); end if; Match := False; return; end if; end if; Assoc := Get_Chain (Assoc); end loop; if Finish and then Has_Individual then Sem_Individual_Association (Assoc_Chain); end if; if Missing = Missing_Allowed then return; end if; -- LRM 8.6 Procedure Call Statement -- For each formal parameter of a procedure, a procedure call must -- specify exactly one corresponding actual parameter. -- This actual parameter is specified either explicitly, by an -- association element (other than the actual OPEN) in the association -- list, or in the absence of such an association element, by a default -- expression (see Section 4.3.3.2). -- LRM 7.3.3 Function Calls -- For each formal parameter of a function, a function call must -- specify exactly one corresponding actual parameter. -- This actual parameter is specified either explicitly, by an -- association element (other than the actual OPEN) in the association -- list, or in the absence of such an association element, by a default -- expression (see Section 4.3.3.2). -- LRM 1.1.1.2 -- A port of mode IN may be unconnected or unassociated only if its -- declaration includes a default expression. -- It is an error if a port of any mode other than IN is unconnected -- or unassociated and its type is an unconstrained array type. Inter := Interface_Chain; Pos := 0; while Inter /= Null_Iir loop if Arg_Matched (Pos) <= Open and then Get_Default_Value (Inter) = Null_Iir then case Missing is when Missing_Parameter | Missing_Generic => if Finish then Error_Msg_Sem ("no actual for " & Disp_Node (Inter), Loc); end if; Match := False; return; when Missing_Port => case Get_Mode (Inter) is when Iir_In_Mode => if not Finish then raise Internal_Error; end if; Error_Msg_Sem (Disp_Node (Inter) & " of mode IN must be connected", Loc); Match := False; return; when Iir_Out_Mode | Iir_Linkage_Mode | Iir_Inout_Mode | Iir_Buffer_Mode => if not Finish then raise Internal_Error; end if; if Is_Unconstrained_Type_Definition (Get_Type (Inter)) then Error_Msg_Sem ("unconstrained " & Disp_Node (Inter) & " must be connected", Loc); Match := False; return; end if; when Iir_Unknown_Mode => raise Internal_Error; end case; when Missing_Allowed => null; end case; end if; Inter := Get_Chain (Inter); Pos := Pos + 1; end loop; return; end Sem_Association_Chain; end Sem_Assocs;