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|
-------------------------------------------------------------------------------
-- (C) Altran Praxis Limited
-------------------------------------------------------------------------------
--
-- The SPARK toolset is free software; you can redistribute it and/or modify it
-- under terms of the GNU General Public License as published by the Free
-- Software Foundation; either version 3, or (at your option) any later
-- version. The SPARK toolset 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 distributed with the SPARK toolset; see file
-- COPYING3. If not, go to http://www.gnu.org/licenses for a complete copy of
-- the license.
--
--=============================================================================
with SLI;
separate (Sem.Wf_Basic_Declarative_Item.Wf_Basic_Declaration)
procedure Wf_Variable_Declaration
(Node : in STree.SyntaxNode;
Enclosing_Unit_Scope : in Dictionary.Scopes;
Declaration_Scope : in Dictionary.Scopes;
The_Heap : in out Heap.HeapRecord)
is
type Declaration_Sorts is (In_Package, In_Subprogram, In_Protected_Type);
Declaration_Sort : Declaration_Sorts;
Type_Node : STree.SyntaxNode;
Exp_Node : STree.SyntaxNode;
Alias_Node : STree.SyntaxNode;
Var_Is_Init : Boolean;
Is_Aliased : Boolean := False;
Unwanted_Seq : SeqAlgebra.Seq;
Exp_Type : Exp_Record;
Type_Sym : Dictionary.Symbol;
Unused_Component_Data : ComponentManager.ComponentData;
-------------------------------------------------------------------------
function Get_Declaration_Sort (Scope : Dictionary.Scopes) return Declaration_Sorts
--# global in Dictionary.Dict;
is
The_Region : Dictionary.Symbol;
Result : Declaration_Sorts;
begin
The_Region := Dictionary.GetRegion (Scope);
if Dictionary.IsPackage (The_Region) then
Result := In_Package;
elsif Dictionary.IsType (The_Region) and then Dictionary.IsProtectedTypeMark (The_Region) then
Result := In_Protected_Type;
else
-- assume subprogram
Result := In_Subprogram;
end if;
return Result;
end Get_Declaration_Sort;
-------------------------------------------------------------------------
procedure Alias_Check
(Type_Sym : in Dictionary.Symbol;
Alias_Node_Pos : in LexTokenManager.Token_Position;
Is_Aliased : in Boolean)
--# global in CommandLineData.Content;
--# in Dictionary.Dict;
--# in LexTokenManager.State;
--# in out ErrorHandler.Error_Context;
--# in out SPARK_IO.File_Sys;
--# derives ErrorHandler.Error_Context,
--# SPARK_IO.File_Sys from Alias_Node_Pos,
--# CommandLineData.Content,
--# Dictionary.Dict,
--# ErrorHandler.Error_Context,
--# Is_Aliased,
--# LexTokenManager.State,
--# SPARK_IO.File_Sys,
--# Type_Sym;
is
begin
if Is_Aliased and then not Dictionary.IsProtectedTypeMark (Type_Sym) then
ErrorHandler.Semantic_Error
(Err_Num => 894,
Reference => ErrorHandler.No_Reference,
Position => Alias_Node_Pos,
Id_Str => LexTokenManager.Null_String);
end if;
end Alias_Check;
-------------------------------------------------------------------------
procedure Wf_Package_Variable
(Node, Exp_Node : in STree.SyntaxNode;
Alias_Node_Pos, Type_Node_Pos : in LexTokenManager.Token_Position;
Type_Sym : in Dictionary.Symbol;
Current_Scope : in Dictionary.Scopes;
Is_Aliased, Var_Is_Init : in Boolean)
--# global in CommandLineData.Content;
--# in ContextManager.Ops.File_Heap;
--# in ContextManager.Ops.Unit_Heap;
--# in ContextManager.Ops.Unit_Stack;
--# in LexTokenManager.State;
--# in out Dictionary.Dict;
--# in out ErrorHandler.Error_Context;
--# in out SLI.State;
--# in out SPARK_IO.File_Sys;
--# in out STree.Table;
--# derives Dictionary.Dict,
--# STree.Table from CommandLineData.Content,
--# ContextManager.Ops.Unit_Stack,
--# Current_Scope,
--# Dictionary.Dict,
--# Exp_Node,
--# Is_Aliased,
--# LexTokenManager.State,
--# Node,
--# STree.Table,
--# Type_Sym,
--# Var_Is_Init &
--# ErrorHandler.Error_Context,
--# SLI.State,
--# SPARK_IO.File_Sys from Alias_Node_Pos,
--# CommandLineData.Content,
--# ContextManager.Ops.File_Heap,
--# ContextManager.Ops.Unit_Heap,
--# ContextManager.Ops.Unit_Stack,
--# Current_Scope,
--# Dictionary.Dict,
--# ErrorHandler.Error_Context,
--# Exp_Node,
--# Is_Aliased,
--# LexTokenManager.State,
--# Node,
--# SLI.State,
--# SPARK_IO.File_Sys,
--# STree.Table,
--# Type_Node_Pos,
--# Type_Sym,
--# Var_Is_Init;
--# pre Syntax_Node_Type (Node, STree.Table) = SP_Symbols.variable_declaration and
--# (Exp_Node = STree.NullNode or Syntax_Node_Type (Exp_Node, STree.Table) = SP_Symbols.expression);
--# post STree.Table = STree.Table~;
is
It : STree.Iterator;
Next_Node : STree.SyntaxNode;
Ident_Str : LexTokenManager.Lex_String;
Root_Type_Sym : Dictionary.Symbol;
Variable_Symbol : Dictionary.Symbol;
Declaration_Symbol : Dictionary.Symbol;
OK_To_Add : Boolean;
-------------------------------------------------------------------------
procedure Check_Type_Consistency
(Sym : in Dictionary.Symbol;
Type_Sym : in Dictionary.Symbol;
Scope : in Dictionary.Scopes;
Error_Node : in STree.SyntaxNode;
OK_To_Add : out Boolean)
--# global in CommandLineData.Content;
--# in Dictionary.Dict;
--# in LexTokenManager.State;
--# in STree.Table;
--# in out ErrorHandler.Error_Context;
--# in out SPARK_IO.File_Sys;
--# derives ErrorHandler.Error_Context,
--# SPARK_IO.File_Sys from CommandLineData.Content,
--# Dictionary.Dict,
--# ErrorHandler.Error_Context,
--# Error_Node,
--# LexTokenManager.State,
--# Scope,
--# SPARK_IO.File_Sys,
--# STree.Table,
--# Sym,
--# Type_Sym &
--# OK_To_Add from Dictionary.Dict,
--# Scope,
--# Sym,
--# Type_Sym;
--# pre Syntax_Node_Type (Error_Node, STree.Table) = SP_Symbols.identifier;
is
Announced_Type : Dictionary.Symbol;
Root_Type_Sym : Dictionary.Symbol;
Consistent : Boolean;
begin
Announced_Type := Dictionary.GetType (Sym);
Root_Type_Sym := Dictionary.GetRootType (Type_Sym);
if Dictionary.IsOwnVariable (Sym) then
if Dictionary.OwnVariableHasType (Sym, Scope) then
if Dictionary.IsSubtype (Type_Sym) then
if Dictionary.IsProtectedTypeMark (Root_Type_Sym) then
-- Protected types may be declared using a subtype of
-- the type used in the own variable declaration.
if Dictionary.IsSubtype (Dictionary.GetType (Sym)) then
-- The own variable was declared using a subtype.
-- Report this error rather than the type mismatch error
ErrorHandler.Semantic_Error
(Err_Num => 948,
Reference => ErrorHandler.No_Reference,
Position => Node_Position (Node => Error_Node),
Id_Str => Dictionary.GetSimpleName (Sym));
Consistent := True;
else
Consistent :=
Dictionary.Types_Are_Equal
(Left_Symbol => Root_Type_Sym,
Right_Symbol => Announced_Type,
Full_Range_Subtype => False);
end if;
else
-- The types must be the same
Consistent :=
Dictionary.Types_Are_Equal
(Left_Symbol => Type_Sym,
Right_Symbol => Announced_Type,
Full_Range_Subtype => False);
end if;
else
-- The types must be the same
Consistent :=
Dictionary.Types_Are_Equal
(Left_Symbol => Type_Sym,
Right_Symbol => Announced_Type,
Full_Range_Subtype => False);
end if;
else
-- No announced type so consistent by default
Consistent := True;
end if;
else -- This is an own task
Consistent :=
Dictionary.Types_Are_Equal
(Left_Symbol => Root_Type_Sym,
Right_Symbol => Announced_Type,
Full_Range_Subtype => False);
end if;
if not Consistent then
-- Type mismatch between declaration and own variable annotation
ErrorHandler.Semantic_Error
(Err_Num => 22,
Reference => ErrorHandler.No_Reference,
Position => Node_Position (Node => Error_Node),
Id_Str => Node_Lex_String (Node => Error_Node));
end if;
OK_To_Add := Consistent;
end Check_Type_Consistency;
-------------------------------------------------------------------------
function Is_A_Protected_Own_Variable (Sym : Dictionary.Symbol) return Boolean
--# global in Dictionary.Dict;
is
begin
return Dictionary.IsOwnVariable (Sym) and then Dictionary.GetOwnVariableProtected (Sym);
end Is_A_Protected_Own_Variable;
-------------------------------------------------------------------------
procedure Check_PO_Declaration
(Sym : in Dictionary.Symbol;
Type_Sym : in Dictionary.Symbol;
Scope : in Dictionary.Scopes;
Error_Node_Pos : in LexTokenManager.Token_Position;
Valid : out Boolean)
--# global in CommandLineData.Content;
--# in Dictionary.Dict;
--# in LexTokenManager.State;
--# in out ErrorHandler.Error_Context;
--# in out SPARK_IO.File_Sys;
--# derives ErrorHandler.Error_Context,
--# SPARK_IO.File_Sys from CommandLineData.Content,
--# Dictionary.Dict,
--# ErrorHandler.Error_Context,
--# Error_Node_Pos,
--# LexTokenManager.State,
--# Scope,
--# SPARK_IO.File_Sys,
--# Sym,
--# Type_Sym &
--# Valid from Dictionary.Dict,
--# Scope,
--# Sym,
--# Type_Sym;
is
procedure Check_For_Multiple_Instances
(Sym : in Dictionary.Symbol;
Type_Sym : in Dictionary.Symbol;
Scope : in Dictionary.Scopes;
Error_Node_Pos : in LexTokenManager.Token_Position;
Valid : out Boolean)
--# global in CommandLineData.Content;
--# in Dictionary.Dict;
--# in LexTokenManager.State;
--# in out ErrorHandler.Error_Context;
--# in out SPARK_IO.File_Sys;
--# derives ErrorHandler.Error_Context,
--# SPARK_IO.File_Sys from CommandLineData.Content,
--# Dictionary.Dict,
--# ErrorHandler.Error_Context,
--# Error_Node_Pos,
--# LexTokenManager.State,
--# Scope,
--# SPARK_IO.File_Sys,
--# Sym,
--# Type_Sym &
--# Valid from Dictionary.Dict,
--# Sym,
--# Type_Sym;
is
It : Dictionary.Iterator;
Root_Type_Sym : Dictionary.Symbol;
begin
Valid := True;
Root_Type_Sym := Dictionary.GetRootType (Type_Sym);
It := Dictionary.FirstVirtualElement (Root_Type_Sym);
if It /= Dictionary.NullIterator
and then Dictionary.GetVirtualElementOwner (Dictionary.CurrentSymbol (It)) /= Sym then
-- Illegal instance. This variable is not the one associated with
-- the protects list in the own variable clause.
Valid := False;
ErrorHandler.Semantic_Error_Sym
(Err_Num => 942,
Reference => ErrorHandler.No_Reference,
Position => Error_Node_Pos,
Sym => Root_Type_Sym,
Scope => Scope);
end if;
end Check_For_Multiple_Instances;
-------------------------------------------------------------------------
procedure Check_PO_Operations
(Sym : in Dictionary.Symbol;
Type_Sym : in Dictionary.Symbol;
Scope : in Dictionary.Scopes;
Error_Node_Pos : in LexTokenManager.Token_Position)
--# global in CommandLineData.Content;
--# in Dictionary.Dict;
--# in LexTokenManager.State;
--# in out ErrorHandler.Error_Context;
--# in out SPARK_IO.File_Sys;
--# derives ErrorHandler.Error_Context,
--# SPARK_IO.File_Sys from CommandLineData.Content,
--# Dictionary.Dict,
--# ErrorHandler.Error_Context,
--# Error_Node_Pos,
--# LexTokenManager.State,
--# Scope,
--# SPARK_IO.File_Sys,
--# Sym,
--# Type_Sym;
is
Subprogram_It : Dictionary.Iterator;
Subprogram_Sym : Dictionary.Symbol;
Global_Variable_It : Dictionary.Iterator;
begin
-- Get the first subprogram for the protected type.
Subprogram_It := Dictionary.First_Visible_Subprogram (The_Package_Or_Type => Dictionary.GetRootType (Type_Sym));
while not Dictionary.IsNullIterator (Subprogram_It) loop
Subprogram_Sym := Dictionary.CurrentSymbol (Subprogram_It);
-- Get the first global variable for this subprogram.
Global_Variable_It :=
Dictionary.FirstGlobalVariable (Dictionary.GetAbstraction (Subprogram_Sym, Scope), Subprogram_Sym);
-- Check the ceiling priority
Check_Ceiling_Priority
(Sym => Sym,
Scope => Scope,
Check_List => Global_Variable_It,
Priority_Lex_Value => Dictionary.GetTypePriority (Type_Sym),
Error_Node_Pos => Error_Node_Pos);
while not Dictionary.IsNullIterator (Global_Variable_It) loop
if Dictionary.CurrentSymbol (Global_Variable_It) = Sym then
-- A circular dependency has been found
ErrorHandler.Semantic_Error2
(Err_Num => 916,
Reference => ErrorHandler.No_Reference,
Position => Error_Node_Pos,
Id_Str1 => Dictionary.GetSimpleName (Sym),
Id_Str2 => Dictionary.GetSimpleName (Subprogram_Sym));
end if;
Global_Variable_It := Dictionary.NextSymbol (Global_Variable_It);
end loop;
-- Get the next subprogram.
Subprogram_It := Dictionary.NextSymbol (Subprogram_It);
end loop;
end Check_PO_Operations;
procedure Warn_Of_Interrupt_IDs
(Sym : in Dictionary.Symbol;
Scope : in Dictionary.Scopes;
Error_Node_Pos : in LexTokenManager.Token_Position)
--# global in CommandLineData.Content;
--# in Dictionary.Dict;
--# in LexTokenManager.State;
--# in out ErrorHandler.Error_Context;
--# in out SPARK_IO.File_Sys;
--# derives ErrorHandler.Error_Context,
--# SPARK_IO.File_Sys from CommandLineData.Content,
--# Dictionary.Dict,
--# ErrorHandler.Error_Context,
--# Error_Node_Pos,
--# LexTokenManager.State,
--# Scope,
--# SPARK_IO.File_Sys,
--# Sym;
is
begin
if Dictionary.GetHasInterruptProperty (Sym) then
ErrorHandler.Semantic_Warning_Sym (Err_Num => 5,
Position => Error_Node_Pos,
Sym => Sym,
Scope => Scope);
end if;
end Warn_Of_Interrupt_IDs;
begin -- Check_PO_Declaration
if Dictionary.IsLibraryLevel (Scope) then
if Dictionary.OwnVariableHasType (Sym, Scope) then
Check_For_Multiple_Instances
(Sym => Sym,
Type_Sym => Type_Sym,
Scope => Scope,
Error_Node_Pos => Error_Node_Pos,
Valid => Valid);
Check_PO_Operations (Sym => Sym,
Type_Sym => Type_Sym,
Scope => Scope,
Error_Node_Pos => Error_Node_Pos);
Warn_Of_Interrupt_IDs (Sym => Sym,
Scope => Scope,
Error_Node_Pos => Error_Node_Pos);
else
-- The own variable was not type announced.
Valid := False;
ErrorHandler.Semantic_Error
(Err_Num => 925,
Reference => ErrorHandler.No_Reference,
Position => Error_Node_Pos,
Id_Str => Dictionary.GetSimpleName (Sym));
end if;
else
Valid := False;
-- Illegal declaration of protected object
ErrorHandler.Semantic_Error
(Err_Num => 868,
Reference => ErrorHandler.No_Reference,
Position => Error_Node_Pos,
Id_Str => Dictionary.GetSimpleName (Sym));
end if;
end Check_PO_Declaration;
begin -- Wf_Package_Variable
Alias_Check (Type_Sym => Type_Sym,
Alias_Node_Pos => Alias_Node_Pos,
Is_Aliased => Is_Aliased);
Root_Type_Sym := Dictionary.GetRootType (Type_Sym);
--# assert STree.Table = STree.Table~;
It :=
Find_First_Node
(Node_Kind => SP_Symbols.identifier,
From_Root => Child_Node (Current_Node => Node),
In_Direction => STree.Down);
while not STree.IsNull (It) loop
Next_Node := Get_Node (It => It);
--# assert STree.Table = STree.Table~ and
--# Syntax_Node_Type (Next_Node, STree.Table) = SP_Symbols.identifier and
--# Next_Node = Get_Node (It);
OK_To_Add := False;
Ident_Str := Node_Lex_String (Node => Next_Node);
Variable_Symbol := Dictionary.LookupItem
(Name => Ident_Str,
Scope => Current_Scope,
Context => Dictionary.ProofContext,
Full_Package_Name => False);
if Dictionary.Is_Null_Symbol (Variable_Symbol) then
-- package state variable not previously announced
if Dictionary.TypeIsTask (Type_Sym) then
ErrorHandler.Semantic_Error
(Err_Num => 930,
Reference => ErrorHandler.No_Reference,
Position => Node_Position (Node => Next_Node),
Id_Str => Ident_Str);
else
ErrorHandler.Semantic_Error
(Err_Num => 151,
Reference => ErrorHandler.No_Reference,
Position => Node_Position (Node => Next_Node),
Id_Str => Ident_Str);
end if;
elsif Dictionary.GetContext (Variable_Symbol) = Dictionary.ProgramContext then
ErrorHandler.Semantic_Error
(Err_Num => 10,
Reference => ErrorHandler.No_Reference,
Position => Node_Position (Node => Next_Node),
Id_Str => Ident_Str);
elsif not (Dictionary.IsOwnVariable (Variable_Symbol)
or else Dictionary.IsConstituent (Variable_Symbol)
or else Dictionary.IsOwnTask (Variable_Symbol)) then
ErrorHandler.Semantic_Error
(Err_Num => 10,
Reference => ErrorHandler.No_Reference,
Position => Node_Position (Node => Next_Node),
Id_Str => Ident_Str);
elsif Dictionary.IsRefinedOwnVariable (Variable_Symbol) then
ErrorHandler.Semantic_Error
(Err_Num => 73,
Reference => ErrorHandler.No_Reference,
Position => Node_Position (Node => Next_Node),
Id_Str => Ident_Str);
else
OK_To_Add := True;
end if;
--# assert STree.Table = STree.Table~ and
--# Syntax_Node_Type (Next_Node, STree.Table) = SP_Symbols.identifier and
--# Next_Node = Get_Node (It) and
--# (OK_To_Add -> (not Dictionary.Is_Null_Symbol (Variable_Symbol)));
if OK_To_Add then
Check_Task_Modifier_Consistency
(The_Own_Var_Type => Dictionary.GetType (Variable_Symbol),
The_Var_Type => Type_Sym,
Modifier_Is_Task => Dictionary.IsOwnTask (Variable_Symbol),
Error_Node => Next_Node,
Consistent => OK_To_Add);
end if;
--# assert STree.Table = STree.Table~ and
--# Syntax_Node_Type (Next_Node, STree.Table) = SP_Symbols.identifier and
--# Next_Node = Get_Node (It) and
--# (OK_To_Add -> (not Dictionary.Is_Null_Symbol (Variable_Symbol)));
if OK_To_Add then
Check_Protected_Modifier_Consistency
(The_Type => Type_Sym,
Modifier_Is_Protected => Dictionary.IsOwnVariable (Variable_Symbol)
and then Dictionary.GetOwnVariableProtected (Variable_Symbol),
Error_Node => Next_Node,
Consistent => OK_To_Add);
end if;
--# assert STree.Table = STree.Table~ and
--# Syntax_Node_Type (Next_Node, STree.Table) = SP_Symbols.identifier and
--# Next_Node = Get_Node (It) and
--# (OK_To_Add -> (not Dictionary.Is_Null_Symbol (Variable_Symbol)));
if OK_To_Add
and then ((Dictionary.IsOwnVariable (Variable_Symbol)
or else (Dictionary.IsConstituent (Variable_Symbol)))) then
Check_Suspendable_Property_Consistency
(Sym => Variable_Symbol,
Type_Sym => Type_Sym,
Is_In_Suspends_List => Dictionary.GetIsSuspendable (Variable_Symbol),
Error_Node_Pos => Node_Position (Node => Node),
Consistent => OK_To_Add);
end if;
--# assert STree.Table = STree.Table~ and
--# Syntax_Node_Type (Next_Node, STree.Table) = SP_Symbols.identifier and
--# Next_Node = Get_Node (It) and
--# (OK_To_Add -> (not Dictionary.Is_Null_Symbol (Variable_Symbol)));
if OK_To_Add
and then (Dictionary.IsOwnVariable (Variable_Symbol)
or else Dictionary.IsConstituent (Variable_Symbol)) then
Check_Priority_Property_Consistency
(Sym => Variable_Symbol,
Type_Sym => Type_Sym,
Priority_Property_Value => Dictionary.GetPriorityProperty (Variable_Symbol),
Error_Node_Pos => Node_Position (Node => Next_Node),
Consistent => OK_To_Add);
end if;
--# assert STree.Table = STree.Table~ and
--# Syntax_Node_Type (Next_Node, STree.Table) = SP_Symbols.identifier and
--# Next_Node = Get_Node (It) and
--# (OK_To_Add -> (not Dictionary.Is_Null_Symbol (Variable_Symbol)));
if OK_To_Add
and then (Dictionary.IsOwnVariable (Variable_Symbol)
or else Dictionary.IsConstituent (Variable_Symbol)) then
Check_Interrupt_Property_Consistency
(Has_Interrupt_Property => Dictionary.GetHasInterruptProperty (Variable_Symbol),
Sym => Variable_Symbol,
Type_Sym => Type_Sym,
Error_Node_Pos => Node_Position (Node => Next_Node),
Consistent => OK_To_Add);
end if;
--# assert STree.Table = STree.Table~ and
--# Syntax_Node_Type (Next_Node, STree.Table) = SP_Symbols.identifier and
--# Next_Node = Get_Node (It) and
--# (OK_To_Add -> (not Dictionary.Is_Null_Symbol (Variable_Symbol)));
if OK_To_Add
and then ((Dictionary.IsOwnVariable (Variable_Symbol)
and then Dictionary.OwnVariableHasType (Variable_Symbol, Current_Scope))
or else (Dictionary.IsOwnTask (Variable_Symbol))) then
-- This is a type announced own variable or task own variable.
-- Check that announced type matches the one used in the declaration.
Check_Type_Consistency
(Sym => Variable_Symbol,
Type_Sym => Type_Sym,
Scope => Current_Scope,
Error_Node => Next_Node,
OK_To_Add => OK_To_Add);
end if;
--# assert STree.Table = STree.Table~ and
--# Syntax_Node_Type (Next_Node, STree.Table) = SP_Symbols.identifier and
--# Next_Node = Get_Node (It) and
--# (OK_To_Add -> (not Dictionary.Is_Null_Symbol (Variable_Symbol)));
if OK_To_Add and then Dictionary.TypeIsTask (Type_Sym) then
Check_Ceiling_Priority
(Sym => Variable_Symbol,
Scope => Current_Scope,
Check_List => Dictionary.FirstGlobalVariable (Dictionary.IsAbstract, Root_Type_Sym),
Priority_Lex_Value => Dictionary.GetTypePriority (Type_Sym),
Error_Node_Pos => Node_Position (Node => Next_Node));
end if;
--# assert STree.Table = STree.Table~ and
--# Syntax_Node_Type (Next_Node, STree.Table) = SP_Symbols.identifier and
--# Next_Node = Get_Node (It) and
--# (OK_To_Add -> (not Dictionary.Is_Null_Symbol (Variable_Symbol)));
if OK_To_Add
and then Var_Is_Init
and then Dictionary.IsOwnVariableOrConstituentWithMode (Variable_Symbol)
and then not Is_A_Protected_Own_Variable (Sym => Variable_Symbol) then
ErrorHandler.Semantic_Error
(Err_Num => 720,
Reference => ErrorHandler.No_Reference,
Position => Node_Position (Node => Next_Node),
Id_Str => Ident_Str);
OK_To_Add := False;
end if;
--# assert STree.Table = STree.Table~ and
--# Syntax_Node_Type (Next_Node, STree.Table) = SP_Symbols.identifier and
--# Next_Node = Get_Node (It) and
--# (OK_To_Add -> (not Dictionary.Is_Null_Symbol (Variable_Symbol)));
if Dictionary.FirstVirtualElement (Root_Type_Sym) /= Dictionary.NullIterator
and then not Dictionary.IsProtectedTypeMark (Root_Type_Sym) then
-- A protects property has been given in an own variable declaration that
-- announces a type that is not a protected type.
OK_To_Add := False;
ErrorHandler.Semantic_Error
(Err_Num => 937,
Reference => ErrorHandler.No_Reference,
Position => Node_Position (Node => Next_Node),
Id_Str => Dictionary.GetSimpleName (Variable_Symbol));
end if;
--# assert STree.Table = STree.Table~ and
--# Syntax_Node_Type (Next_Node, STree.Table) = SP_Symbols.identifier and
--# Next_Node = Get_Node (It) and
--# (OK_To_Add -> (not Dictionary.Is_Null_Symbol (Variable_Symbol)));
if OK_To_Add and then Dictionary.IsProtectedTypeMark (Type_Sym) then
Check_PO_Declaration
(Sym => Variable_Symbol,
Type_Sym => Type_Sym,
Scope => Current_Scope,
Error_Node_Pos => Node_Position (Node => Next_Node),
Valid => OK_To_Add);
end if;
--# assert STree.Table = STree.Table~ and
--# Syntax_Node_Type (Next_Node, STree.Table) = SP_Symbols.identifier and
--# Next_Node = Get_Node (It) and
--# (OK_To_Add -> (not Dictionary.Is_Null_Symbol (Variable_Symbol)));
if OK_To_Add and then Var_Is_Init and then Unexpected_Initialization (Sym => Variable_Symbol) then
ErrorHandler.Semantic_Error
(Err_Num => 333,
Reference => ErrorHandler.No_Reference,
Position => Node_Position (Node => Next_Node),
Id_Str => Ident_Str);
end if;
--# assert STree.Table = STree.Table~ and
--# Syntax_Node_Type (Next_Node, STree.Table) = SP_Symbols.identifier and
--# Next_Node = Get_Node (It) and
--# (OK_To_Add -> (not Dictionary.Is_Null_Symbol (Variable_Symbol)));
if OK_To_Add
and then not Var_Is_Init
and then Dictionary.IsOwnVariable (Variable_Symbol)
and then Dictionary.GetOwnVariableMode (Variable_Symbol) = Dictionary.DefaultMode
and then (Dictionary.GetOwnVariableProtected (Variable_Symbol)
or else Dictionary.IsVirtualElement (Variable_Symbol)) then
-- Non moded protected state must be initialized at declaration.
ErrorHandler.Semantic_Error
(Err_Num => 874,
Reference => ErrorHandler.No_Reference,
Position => Node_Position (Node => Next_Node),
Id_Str => Ident_Str);
end if;
--# assert STree.Table = STree.Table~ and
--# Syntax_Node_Type (Next_Node, STree.Table) = SP_Symbols.identifier and
--# Next_Node = Get_Node (It) and
--# (OK_To_Add -> (not Dictionary.Is_Null_Symbol (Variable_Symbol)));
if OK_To_Add then
--# accept F, 10, Declaration_Symbol, "Expected ineffective assignment";
Dictionary.Add_Variable_Declaration
(Variable_Sym => Variable_Symbol,
The_Type => Type_Sym,
Initialized => Var_Is_Init,
Is_Aliased => Is_Aliased,
Exp_Node => STree.NodeToRef (Exp_Node),
Type_Reference => Dictionary.Location'(Start_Position => Type_Node_Pos,
End_Position => Type_Node_Pos),
Comp_Unit => ContextManager.Ops.Current_Unit,
Declaration => Dictionary.Location'(Start_Position => Node_Position (Node => Next_Node),
End_Position => Node_Position (Node => Next_Node)),
Scope => Current_Scope,
Declaration_Symbol => Declaration_Symbol);
--# end accept;
SystemErrors.RT_Assert
(C => Dictionary.IsVariable (Variable_Symbol),
Sys_Err => SystemErrors.Invalid_Syntax_Tree,
Msg => "in Wf_Package_Variable");
STree.Add_Node_Symbol (Node => Next_Node,
Sym => Variable_Symbol);
if ErrorHandler.Generate_SLI then
SLI.Generate_Xref_Symbol
(Comp_Unit => ContextManager.Ops.Current_Unit,
Parse_Tree => Next_Node,
Symbol => Variable_Symbol,
Is_Declaration => True);
end if;
-- if we have an in stream, then initially mark it as invalid
if Dictionary.GetOwnVariableOrConstituentMode (Variable_Symbol) = Dictionary.InMode then
Dictionary.SetVariableMarkedValid (Variable_Symbol, False);
end if;
STree.Set_Node_Lex_String (Sym => Variable_Symbol,
Node => Next_Node);
end if;
It := STree.NextNode (It);
end loop;
--# accept F, 33, Declaration_Symbol, "Expected unused variable";
end Wf_Package_Variable;
-------------------------------------------------------------------------
procedure Wf_Procedure_Variable
(Node, Exp_Node : in STree.SyntaxNode;
Alias_Node_Pos, Type_Node_Pos : in LexTokenManager.Token_Position;
Type_Sym : in Dictionary.Symbol;
Current_Scope : in Dictionary.Scopes;
Is_Aliased, Var_Is_Init : in Boolean)
--# global in CommandLineData.Content;
--# in ContextManager.Ops.File_Heap;
--# in ContextManager.Ops.Unit_Heap;
--# in ContextManager.Ops.Unit_Stack;
--# in LexTokenManager.State;
--# in out Dictionary.Dict;
--# in out ErrorHandler.Error_Context;
--# in out SLI.State;
--# in out SPARK_IO.File_Sys;
--# in out STree.Table;
--# derives Dictionary.Dict,
--# STree.Table from CommandLineData.Content,
--# ContextManager.Ops.Unit_Stack,
--# Current_Scope,
--# Dictionary.Dict,
--# Exp_Node,
--# LexTokenManager.State,
--# Node,
--# STree.Table,
--# Type_Sym,
--# Var_Is_Init &
--# ErrorHandler.Error_Context,
--# SLI.State,
--# SPARK_IO.File_Sys from Alias_Node_Pos,
--# CommandLineData.Content,
--# ContextManager.Ops.File_Heap,
--# ContextManager.Ops.Unit_Heap,
--# ContextManager.Ops.Unit_Stack,
--# Current_Scope,
--# Dictionary.Dict,
--# ErrorHandler.Error_Context,
--# Exp_Node,
--# Is_Aliased,
--# LexTokenManager.State,
--# Node,
--# SLI.State,
--# SPARK_IO.File_Sys,
--# STree.Table,
--# Type_Node_Pos,
--# Type_Sym,
--# Var_Is_Init;
--# pre Syntax_Node_Type (Node, STree.Table) = SP_Symbols.variable_declaration and
--# (Exp_Node = STree.NullNode or Syntax_Node_Type (Exp_Node, STree.Table) = SP_Symbols.expression);
--# post STree.Table = STree.Table~;
is
It : STree.Iterator;
Next_Node : STree.SyntaxNode;
Ident_Str : LexTokenManager.Lex_String;
Sym : Dictionary.Symbol;
Declaration_Symbol : Dictionary.Symbol;
Variable_Symbol : Dictionary.Symbol;
OK_To_Add : Boolean;
begin
Alias_Check (Type_Sym => Type_Sym,
Alias_Node_Pos => Alias_Node_Pos,
Is_Aliased => Is_Aliased);
It := Find_First_Node
(Node_Kind => SP_Symbols.identifier,
From_Root => Child_Node (Current_Node => Node),
In_Direction => STree.Down);
while not STree.IsNull (It) loop
Next_Node := Get_Node (It => It);
--# assert STree.Table = STree.Table~ and
--# Syntax_Node_Type (Next_Node, STree.Table) = SP_Symbols.identifier and
--# Next_Node = Get_Node (It);
Ident_Str := Node_Lex_String (Node => Next_Node);
Sym := Dictionary.LookupItem
(Name => Ident_Str,
Scope => Current_Scope,
Context => Dictionary.ProofContext,
Full_Package_Name => False);
OK_To_Add := True;
if Dictionary.IsProtectedTypeMark (Type_Sym) then
OK_To_Add := False;
-- Illegal declaration of protected object
ErrorHandler.Semantic_Error
(Err_Num => 868,
Reference => ErrorHandler.No_Reference,
Position => Node_Position (Node => Next_Node),
Id_Str => Ident_Str);
elsif Dictionary.IsPredefinedSuspensionObjectType (Type_Sym) then
OK_To_Add := False;
-- Illegal declaration of suspension object
ErrorHandler.Semantic_Error
(Err_Num => 901,
Reference => ErrorHandler.No_Reference,
Position => Node_Position (Node => Next_Node),
Id_Str => Ident_Str);
elsif Dictionary.TypeIsTask (Type_Sym) then
OK_To_Add := False;
-- illegal declaration of task object.
ErrorHandler.Semantic_Error
(Err_Num => 926,
Reference => ErrorHandler.No_Reference,
Position => Node_Position (Node => Next_Node),
Id_Str => Ident_Str);
end if;
if not Dictionary.Is_Null_Symbol (Sym) then
OK_To_Add := False;
-- already exists
ErrorHandler.Semantic_Error
(Err_Num => 10,
Reference => ErrorHandler.No_Reference,
Position => Node_Position (Node => Next_Node),
Id_Str => Ident_Str);
end if;
if OK_To_Add then
Dictionary.Add_Variable
(Name => Ident_Str,
The_Type => Type_Sym,
Initialized => Var_Is_Init,
Is_Aliased => False,
Exp_Node => STree.NodeToRef (Exp_Node),
Type_Reference => Dictionary.Location'(Start_Position => Type_Node_Pos,
End_Position => Type_Node_Pos),
Comp_Unit => ContextManager.Ops.Current_Unit,
Declaration => Dictionary.Location'(Start_Position => Node_Position (Node => Next_Node),
End_Position => Node_Position (Node => Next_Node)),
Scope => Current_Scope,
Declaration_Symbol => Declaration_Symbol,
Variable_Symbol => Variable_Symbol);
STree.Add_Node_Symbol (Node => Next_Node,
Sym => Variable_Symbol);
if ErrorHandler.Generate_SLI then
SLI.Generate_Xref_Symbol
(Comp_Unit => ContextManager.Ops.Current_Unit,
Parse_Tree => Next_Node,
Symbol => Declaration_Symbol,
Is_Declaration => True);
end if;
end if;
It := STree.NextNode (It);
end loop;
end Wf_Procedure_Variable;
-------------------------------------------------------------------------
procedure Wf_Protected_Element
(Node, Exp_Node : in STree.SyntaxNode;
Alias_Node_Pos, Type_Node_Pos : in LexTokenManager.Token_Position;
Type_Sym : in Dictionary.Symbol;
Current_Scope : in Dictionary.Scopes;
Is_Aliased, Var_Is_Init : in Boolean)
--# global in CommandLineData.Content;
--# in ContextManager.Ops.File_Heap;
--# in ContextManager.Ops.Unit_Heap;
--# in ContextManager.Ops.Unit_Stack;
--# in LexTokenManager.State;
--# in out Dictionary.Dict;
--# in out ErrorHandler.Error_Context;
--# in out SLI.State;
--# in out SPARK_IO.File_Sys;
--# in out STree.Table;
--# derives Dictionary.Dict,
--# STree.Table from CommandLineData.Content,
--# ContextManager.Ops.Unit_Stack,
--# Current_Scope,
--# Dictionary.Dict,
--# Exp_Node,
--# LexTokenManager.State,
--# Node,
--# STree.Table,
--# Type_Sym,
--# Var_Is_Init &
--# ErrorHandler.Error_Context,
--# SLI.State,
--# SPARK_IO.File_Sys from Alias_Node_Pos,
--# CommandLineData.Content,
--# ContextManager.Ops.File_Heap,
--# ContextManager.Ops.Unit_Heap,
--# ContextManager.Ops.Unit_Stack,
--# Current_Scope,
--# Dictionary.Dict,
--# ErrorHandler.Error_Context,
--# Exp_Node,
--# Is_Aliased,
--# LexTokenManager.State,
--# Node,
--# SLI.State,
--# SPARK_IO.File_Sys,
--# STree.Table,
--# Type_Node_Pos,
--# Type_Sym,
--# Var_Is_Init;
--# pre Syntax_Node_Type (Node, STree.Table) = SP_Symbols.variable_declaration and
--# (Exp_Node = STree.NullNode or Syntax_Node_Type (Exp_Node, STree.Table) = SP_Symbols.expression);
--# post STree.Table = STree.Table~;
is
It : STree.Iterator;
Next_Node : STree.SyntaxNode;
Ident_Str : LexTokenManager.Lex_String;
Declaration_Symbol : Dictionary.Symbol;
Variable_Symbol : Dictionary.Symbol;
OK_To_Add : Boolean;
begin
Alias_Check (Type_Sym => Type_Sym,
Alias_Node_Pos => Alias_Node_Pos,
Is_Aliased => Is_Aliased);
It := Find_First_Node
(Node_Kind => SP_Symbols.identifier,
From_Root => Child_Node (Current_Node => Node),
In_Direction => STree.Down);
while not STree.IsNull (It) loop
Next_Node := Get_Node (It => It);
--# assert STree.Table = STree.Table~ and
--# Syntax_Node_Type (Next_Node, STree.Table) = SP_Symbols.identifier and
--# Next_Node = Get_Node (It);
Ident_Str := Node_Lex_String (Node => Next_Node);
Variable_Symbol := Dictionary.LookupItem
(Name => Ident_Str,
Scope => Current_Scope,
Context => Dictionary.ProofContext,
Full_Package_Name => False);
OK_To_Add := True;
if Dictionary.IsProtectedTypeMark (Type_Sym) then
OK_To_Add := False;
-- Illegal declaration of protected object
ErrorHandler.Semantic_Error
(Err_Num => 868,
Reference => ErrorHandler.No_Reference,
Position => Node_Position (Node => Next_Node),
Id_Str => Ident_Str);
elsif Dictionary.IsPredefinedSuspensionObjectType (Type_Sym) then
OK_To_Add := False;
-- Illegal declaration of suspension object
ErrorHandler.Semantic_Error
(Err_Num => 901,
Reference => ErrorHandler.No_Reference,
Position => Node_Position (Node => Next_Node),
Id_Str => Ident_Str);
elsif Dictionary.TypeIsTask (Type_Sym) then
OK_To_Add := False;
-- illegal declaration of task object.
ErrorHandler.Semantic_Error
(Err_Num => 926,
Reference => ErrorHandler.No_Reference,
Position => Node_Position (Node => Next_Node),
Id_Str => Ident_Str);
elsif not Dictionary.Is_Null_Symbol (Variable_Symbol) then
OK_To_Add := False;
-- already exists
ErrorHandler.Semantic_Error
(Err_Num => 10,
Reference => ErrorHandler.No_Reference,
Position => Node_Position (Node => Next_Node),
Id_Str => Ident_Str);
end if;
if OK_To_Add then
-- Declaration is legal
-- First add variable as a refinement constituent of the implicit own variable associated
-- with the protected type
Dictionary.AddConstituent
(Name => Ident_Str,
Subject => Dictionary.GetProtectedTypeOwnVariable (Dictionary.GetRegion (Current_Scope)),
Mode => Dictionary.DefaultMode,
SubjectReference => Dictionary.Location'(Start_Position => Node_Position (Node => Next_Node),
End_Position => Node_Position (Node => Next_Node)),
Comp_Unit => ContextManager.Ops.Current_Unit,
ConstituentReference => Dictionary.Location'(Start_Position => Node_Position (Node => Next_Node),
End_Position => Node_Position (Node => Next_Node)));
Variable_Symbol := Dictionary.LookupImmediateScope
(Name => Ident_Str,
Scope => Dictionary.Set_Visibility (The_Visibility => Dictionary.Privat,
The_Unit => Dictionary.GetRegion (Current_Scope)),
Context => Dictionary.ProofContext);
SystemErrors.RT_Assert
(C => not Dictionary.Is_Null_Symbol (Variable_Symbol),
Sys_Err => SystemErrors.Invalid_Syntax_Tree,
Msg => "in Wf_Protected_Element");
-- then add the variable itself
Dictionary.Add_Variable_Declaration
(Variable_Sym => Variable_Symbol,
The_Type => Type_Sym,
Initialized => Var_Is_Init,
Is_Aliased => False,
Exp_Node => STree.NodeToRef (Exp_Node),
Type_Reference => Dictionary.Location'(Start_Position => Type_Node_Pos,
End_Position => Type_Node_Pos),
Comp_Unit => ContextManager.Ops.Current_Unit,
Declaration => Dictionary.Location'(Start_Position => Node_Position (Node => Next_Node),
End_Position => Node_Position (Node => Next_Node)),
Scope => Current_Scope,
Declaration_Symbol => Declaration_Symbol);
SystemErrors.RT_Assert
(C => Dictionary.IsVariable (Variable_Symbol),
Sys_Err => SystemErrors.Invalid_Syntax_Tree,
Msg => "in Wf_Protected_Element");
STree.Add_Node_Symbol (Node => Next_Node,
Sym => Variable_Symbol);
if ErrorHandler.Generate_SLI then
SLI.Generate_Xref_Symbol
(Comp_Unit => ContextManager.Ops.Current_Unit,
Parse_Tree => Next_Node,
Symbol => Declaration_Symbol,
Is_Declaration => True);
end if;
-- Checking that protected elements are initialized is now done
-- in wf_protected_type_declaration to allow for justification of
-- these errors.
end if;
It := STree.NextNode (It);
end loop;
end Wf_Protected_Element;
begin -- Wf_Variable_Declaration
Heap.Reset (The_Heap);
Alias_Node := STree.NullNode;
Declaration_Sort := Get_Declaration_Sort (Scope => Declaration_Scope);
Type_Node := Next_Sibling (Current_Node => Child_Node (Current_Node => Node));
-- ASSUME Type_Node = RWaliased OR type_mark
if Syntax_Node_Type (Node => Type_Node) = SP_Symbols.RWaliased then
-- ASSUME Type_Node = RWaliased
Is_Aliased := True;
Alias_Node := Type_Node;
Type_Node := Next_Sibling (Current_Node => Type_Node);
elsif Syntax_Node_Type (Node => Type_Node) /= SP_Symbols.type_mark then
SystemErrors.Fatal_Error
(Sys_Err => SystemErrors.Invalid_Syntax_Tree,
Msg => "Expect Type_Node = RWaliased OR type_mark in Wf_Variable_Declaration");
end if;
-- ASSUME Type_Node = type_mark
SystemErrors.RT_Assert
(C => Syntax_Node_Type (Node => Type_Node) = SP_Symbols.type_mark,
Sys_Err => SystemErrors.Invalid_Syntax_Tree,
Msg => "Expect Type_Node = type_mark in Wf_Variable_Declaration");
-- ASSUME Alias_Node = RWaliased OR NULL
SystemErrors.RT_Assert
(C => Alias_Node = STree.NullNode or else Syntax_Node_Type (Node => Alias_Node) = SP_Symbols.RWaliased,
Sys_Err => SystemErrors.Invalid_Syntax_Tree,
Msg => "Expect Alias_Node = RWaliased OR NULL in Wf_Variable_Declaration");
Wf_Type_Mark
(Node => Type_Node,
Current_Scope => Enclosing_Unit_Scope,
Context => Dictionary.ProgramContext,
Type_Sym => Type_Sym);
-- variable initialization
-- Protected and suspension objects are implicitly initialised on declaration.
Var_Is_Init := Dictionary.IsPredefinedSuspensionObjectType (Type_Sym) or else Dictionary.IsProtectedTypeMark (Type_Sym);
Exp_Node := Next_Sibling (Current_Node => Type_Node);
-- ASSUME Exp_Node = expression OR NULL
if Syntax_Node_Type (Node => Exp_Node) = SP_Symbols.expression then
-- ASSUME Exp_Node = expression
if Dictionary.TypeIsGeneric (Type_Sym) then
-- Initialization of such variables not allowed in generic bodies because we rely on VCs
-- to do range checks that in non-generic situations can be done statically and
-- no VCs are generated for variable initializations.
ErrorHandler.Semantic_Error
(Err_Num => 651,
Reference => ErrorHandler.No_Reference,
Position => Node_Position (Node => Exp_Node),
Id_Str => LexTokenManager.Null_String);
else
-- Non-generic case, initialization is ok
Var_Is_Init := True;
SeqAlgebra.CreateSeq (The_Heap, Unwanted_Seq);
ComponentManager.Initialise (Unused_Component_Data);
--# accept Flow, 10, Unused_Component_Data, "Unused_Component_Data is discarded";
Walk_Expression_P.Walk_Expression
(Exp_Node => Exp_Node,
Scope => Declaration_Scope,
Type_Context => Type_Sym,
Context_Requires_Static => False,
Ref_Var => Unwanted_Seq,
Result => Exp_Type,
Component_Data => Unused_Component_Data,
The_Heap => The_Heap);
--# end accept;
SeqAlgebra.DisposeOfSeq (The_Heap, Unwanted_Seq);
Assignment_Check
(Position => Node_Position (Node => Exp_Node),
Scope => Enclosing_Unit_Scope,
Target_Type => Type_Sym,
Exp_Result => Exp_Type);
if not Exp_Type.Is_Constant then
ErrorHandler.Semantic_Error
(Err_Num => 50,
Reference => ErrorHandler.No_Reference,
Position => Node_Position (Node => Exp_Node),
Id_Str => LexTokenManager.Null_String);
end if;
end if;
elsif Exp_Node /= STree.NullNode then
SystemErrors.Fatal_Error
(Sys_Err => SystemErrors.Invalid_Syntax_Tree,
Msg => "Expect Exp_Node = expression OR NULL in Wf_Variable_Declaration");
end if;
case Declaration_Sort is
when In_Package =>
Wf_Package_Variable
(Node => Node,
Exp_Node => Exp_Node,
Alias_Node_Pos => Node_Position (Node => Alias_Node),
Type_Node_Pos => Node_Position (Node => Type_Node),
Type_Sym => Type_Sym,
Current_Scope => Declaration_Scope,
Is_Aliased => Is_Aliased,
Var_Is_Init => Var_Is_Init);
when In_Subprogram =>
Wf_Procedure_Variable
(Node => Node,
Exp_Node => Exp_Node,
Alias_Node_Pos => Node_Position (Node => Alias_Node),
Type_Node_Pos => Node_Position (Node => Type_Node),
Type_Sym => Type_Sym,
Current_Scope => Declaration_Scope,
Is_Aliased => Is_Aliased,
Var_Is_Init => Var_Is_Init);
when In_Protected_Type =>
Wf_Protected_Element
(Node => Node,
Exp_Node => Exp_Node,
Alias_Node_Pos => Node_Position (Node => Alias_Node),
Type_Node_Pos => Node_Position (Node => Type_Node),
Type_Sym => Type_Sym,
Current_Scope => Declaration_Scope,
Is_Aliased => Is_Aliased,
Var_Is_Init => Var_Is_Init);
end case;
if Dictionary.Is_Unconstrained_Array_Type_Mark (Type_Sym, Enclosing_Unit_Scope)
or else Dictionary.IsUnconstrainedTaskType (Type_Sym)
or else Dictionary.IsUnconstrainedProtectedType (Type_Sym) then
ErrorHandler.Semantic_Error
(Err_Num => 39,
Reference => ErrorHandler.No_Reference,
Position => Node_Position (Node => Type_Node),
Id_Str => LexTokenManager.Null_String);
end if;
Heap.ReportUsage (The_Heap);
end Wf_Variable_Declaration;
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