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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.
--
--=============================================================================
separate (Sem.Walk_Expression_P)
procedure Check_Binary_Operator
(Operator : in SP_Symbols.SP_Symbol;
Left : in Sem.Exp_Record;
Right : in Sem.Exp_Record;
Scope : in Dictionary.Scopes;
T_Stack : in Type_Context_Stack.T_Stack_Type;
Op_Pos : in LexTokenManager.Token_Position;
Left_Pos : in LexTokenManager.Token_Position;
Right_Pos : in LexTokenManager.Token_Position;
Convert : in Boolean;
Is_Annotation : in Boolean;
Result : in out Sem.Exp_Record)
is
Left_Type, Right_Type, Return_Type : Dictionary.Symbol;
-------------------------------------------------------------
function Mixed_Type_Mult_Or_Div
(Op : SP_Symbols.SP_Symbol;
Left_Type, Right_Type : Dictionary.Symbol;
Scope : Dictionary.Scopes)
return Boolean
--# global in CommandLineData.Content;
--# in Dictionary.Dict;
is
begin
return (Op = SP_Symbols.multiply or else Op = SP_Symbols.divide)
and then (Dictionary.IsFixedPointTypeMark (Right_Type, Scope)
or else Dictionary.IsFixedPointTypeMark (Left_Type, Scope)
or else (CommandLineData.Ravenscar_Selected
and then (Dictionary.IsPredefinedTimeSpanType (Left_Type)
or else Dictionary.IsPredefinedTimeSpanType (Right_Type))));
end Mixed_Type_Mult_Or_Div;
-------------------------------------------------------------
procedure Hetero_Impl_Type_Conv (Left_Type, Right_Type : in out Dictionary.Symbol;
Scope : in Dictionary.Scopes)
--# global in CommandLineData.Content;
--# in Dictionary.Dict;
--# derives Left_Type,
--# Right_Type from CommandLineData.Content,
--# Dictionary.Dict,
--# Left_Type,
--# Right_Type,
--# Scope;
is
begin
if Dictionary.IsUniversalIntegerType (Left_Type)
and then (Dictionary.IsFixedPointTypeMark (Right_Type, Scope)
or else (CommandLineData.Ravenscar_Selected and then Dictionary.IsPredefinedTimeType (Right_Type))) then
Left_Type := Dictionary.GetPredefinedIntegerType;
elsif Dictionary.IsUniversalIntegerType (Right_Type)
and then (Dictionary.IsFixedPointTypeMark (Left_Type, Scope)
or else (CommandLineData.Ravenscar_Selected and then Dictionary.IsPredefinedTimeType (Left_Type))) then
Right_Type := Dictionary.GetPredefinedIntegerType;
elsif CommandLineData.Content.Language_Profile /= CommandLineData.SPARK83
and then Dictionary.IsUniversalRealType (Right_Type)
and then Dictionary.IsFixedPointTypeMark (Left_Type, Scope) then
Right_Type := Dictionary.GetUniversalFixedType;
elsif CommandLineData.Content.Language_Profile /= CommandLineData.SPARK83
and then Dictionary.IsUniversalRealType (Left_Type)
and then Dictionary.IsFixedPointTypeMark (Right_Type, Scope) then
Left_Type := Dictionary.GetUniversalFixedType;
end if;
end Hetero_Impl_Type_Conv;
-----------------------------------------------------------------
procedure Homo_Impl_Type_Conv
(Operator : in SP_Symbols.SP_Symbol;
Left_Type, Right_Type : in out Dictionary.Symbol;
Left_Val : in Maths.Value;
Right_Val : in Maths.Value;
Left_Has_Operators : in Boolean;
Right_Has_Operators : in Boolean;
Left_Pos : in LexTokenManager.Token_Position;
Right_Pos : in LexTokenManager.Token_Position;
Is_Annotation : in Boolean;
T_Stack : in Type_Context_Stack.T_Stack_Type;
Scope : in Dictionary.Scopes)
--# 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,
--# Is_Annotation,
--# Left_Has_Operators,
--# Left_Pos,
--# Left_Type,
--# Left_Val,
--# LexTokenManager.State,
--# Operator,
--# Right_Has_Operators,
--# Right_Pos,
--# Right_Type,
--# Right_Val,
--# Scope,
--# SPARK_IO.File_Sys &
--# Left_Type from *,
--# Dictionary.Dict,
--# Left_Has_Operators,
--# Operator,
--# Right_Type,
--# Scope,
--# T_Stack &
--# Right_Type from *,
--# Dictionary.Dict,
--# Left_Type,
--# Operator,
--# Right_Has_Operators,
--# Scope,
--# T_Stack;
--# pre Type_Context_Stack.Stack_Is_Valid (T_Stack);
is separate;
begin -- Check_Binary_Operator
Left_Type := Dictionary.GetRootType (Left.Type_Symbol);
Right_Type := Dictionary.GetRootType (Right.Type_Symbol);
-- suppress type conversion in case of fixed point * or /
if Convert then
if Mixed_Type_Mult_Or_Div (Op => Operator,
Left_Type => Left_Type,
Right_Type => Right_Type,
Scope => Scope) then
Hetero_Impl_Type_Conv (Left_Type => Left_Type,
Right_Type => Right_Type,
Scope => Scope);
else
Homo_Impl_Type_Conv
(Operator => Operator,
Left_Type => Left_Type,
Right_Type => Right_Type,
Left_Val => Left.Value,
Right_Val => Right.Value,
Left_Has_Operators => Left.Has_Operators,
Right_Has_Operators => Right.Has_Operators,
Left_Pos => Left_Pos,
Right_Pos => Right_Pos,
Is_Annotation => Is_Annotation,
T_Stack => T_Stack,
Scope => Scope);
end if;
end if;
Return_Type := Dictionary.Get_Binary_Operator_Type (Name => Operator,
Left => Left_Type,
Right => Right_Type);
if Dictionary.Is_Null_Symbol (Return_Type) then
Result := Sem.Unknown_Type_Record;
if Dictionary.IsUniversalIntegerType (Left_Type) and then Dictionary.IsModularTypeMark (Right_Type, Scope) then
ErrorHandler.Semantic_Error_Sym
(Err_Num => 804,
Reference => ErrorHandler.No_Reference,
Position => Op_Pos,
Sym => Right_Type,
Scope => Scope);
elsif Dictionary.IsUniversalIntegerType (Right_Type) and then Dictionary.IsModularTypeMark (Left_Type, Scope) then
ErrorHandler.Semantic_Error_Sym
(Err_Num => 805,
Reference => ErrorHandler.No_Reference,
Position => Op_Pos,
Sym => Left_Type,
Scope => Scope);
else
ErrorHandler.Semantic_Error_Sym2
(Err_Num => 35,
Reference => ErrorHandler.No_Reference,
Position => Op_Pos,
Sym => Left_Type,
Sym2 => Right_Type,
Scope => Scope);
end if;
elsif not Is_Annotation and then not Dictionary.BinaryOperatorIsVisible (Operator, Left_Type, Right_Type, Scope) then
Result := Sem.Unknown_Type_Record;
ErrorHandler.Semantic_Error
(Err_Num => 309,
Reference => ErrorHandler.No_Reference,
Position => Op_Pos,
Id_Str => LexTokenManager.Null_String);
else
-- check whether equality of floats is being used
if not Is_Annotation
and then (Operator = SP_Symbols.equals or else Operator = SP_Symbols.not_equal)
and then (Dictionary.ContainsFloat (Left_Type) or else Dictionary.ContainsFloat (Right_Type)) then
ErrorHandler.Semantic_Warning (Err_Num => 308,
Position => Op_Pos,
Id_Str => LexTokenManager.Null_String);
end if;
Result.Type_Symbol := Return_Type;
end if;
end Check_Binary_Operator;
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