// Marek Safar (marek.safar@seznam.cz)
//
// Copyright 2002, 2003 Ximian, Inc.
-// Copyright 2003-2008, Novell, Inc.
+// Copyright 2003-2011, Novell, Inc.
//
using System;
namespace Mono.CSharp {
- public class ConstantFold {
-
- public static readonly Type[] binary_promotions = new Type[] {
- TypeManager.decimal_type, TypeManager.double_type, TypeManager.float_type,
- TypeManager.uint64_type, TypeManager.int64_type, TypeManager.uint32_type };
+ public static class ConstantFold
+ {
+ public static TypeSpec[] CreateBinaryPromotionsTypes (BuiltinTypes types)
+ {
+ return new TypeSpec[] {
+ types.Decimal, types.Double, types.Float,
+ types.ULong, types.Long, types.UInt
+ };
+ }
//
// Performs the numeric promotions on the left and right expresions
// On success, the types of `lc' and `rc' on output will always match,
// and the pair will be one of:
//
- static bool DoBinaryNumericPromotions (ref Constant left, ref Constant right)
+ // TODO: BinaryFold should be called as an optimization step only,
+ // error checking here is weak
+ //
+ static bool DoBinaryNumericPromotions (ResolveContext rc, ref Constant left, ref Constant right)
{
- Type ltype = left.Type;
- Type rtype = right.Type;
+ TypeSpec ltype = left.Type;
+ TypeSpec rtype = right.Type;
- foreach (Type t in binary_promotions) {
+ foreach (TypeSpec t in rc.BuiltinTypes.BinaryPromotionsTypes) {
if (t == ltype)
- return t == rtype || ConvertPromotion (ref right, ref left, t);
+ return t == rtype || ConvertPromotion (rc, ref right, ref left, t);
if (t == rtype)
- return t == ltype || ConvertPromotion (ref left, ref right, t);
+ return t == ltype || ConvertPromotion (rc, ref left, ref right, t);
}
- left = left.ConvertImplicitly (TypeManager.int32_type);
- right = right.ConvertImplicitly (TypeManager.int32_type);
+ left = left.ConvertImplicitly (rc.BuiltinTypes.Int);
+ right = right.ConvertImplicitly (rc.BuiltinTypes.Int);
return left != null && right != null;
}
- static bool ConvertPromotion (ref Constant prim, ref Constant second, Type type)
+ static bool ConvertPromotion (ResolveContext rc, ref Constant prim, ref Constant second, TypeSpec type)
{
Constant c = prim.ConvertImplicitly (type);
if (c != null) {
return true;
}
- if (type == TypeManager.uint32_type) {
- type = TypeManager.int64_type;
+ if (type.BuiltinType == BuiltinTypeSpec.Type.UInt) {
+ type = rc.BuiltinTypes.Long;
prim = prim.ConvertImplicitly (type);
second = second.ConvertImplicitly (type);
return prim != null && second != null;
return false;
}
- internal static void Error_CompileTimeOverflow (Location loc)
+ internal static void Error_CompileTimeOverflow (ResolveContext rc, Location loc)
{
- Report.Error (220, loc, "The operation overflows at compile time in checked mode");
+ rc.Report.Error (220, loc, "The operation overflows at compile time in checked mode");
}
/// <summary>
///
/// Returns null if the expression can not be folded.
/// </summary>
- static public Constant BinaryFold (EmitContext ec, Binary.Operator oper,
+ static public Constant BinaryFold (ResolveContext ec, Binary.Operator oper,
Constant left, Constant right, Location loc)
{
Constant result = null;
return new SideEffectConstant (result, right, loc);
}
- Type lt = left.Type;
- Type rt = right.Type;
+ TypeSpec lt = left.Type;
+ TypeSpec rt = right.Type;
bool bool_res;
- if (lt == TypeManager.bool_type && lt == rt) {
+ if (lt.BuiltinType == BuiltinTypeSpec.Type.Bool && lt == rt) {
bool lv = (bool) left.GetValue ();
bool rv = (bool) right.GetValue ();
switch (oper) {
case Binary.Operator.BitwiseAnd:
case Binary.Operator.LogicalAnd:
- return new BoolConstant (lv && rv, left.Location);
+ return new BoolConstant (ec.BuiltinTypes, lv && rv, left.Location);
case Binary.Operator.BitwiseOr:
case Binary.Operator.LogicalOr:
- return new BoolConstant (lv || rv, left.Location);
+ return new BoolConstant (ec.BuiltinTypes, lv || rv, left.Location);
case Binary.Operator.ExclusiveOr:
- return new BoolConstant (lv ^ rv, left.Location);
+ return new BoolConstant (ec.BuiltinTypes, lv ^ rv, left.Location);
case Binary.Operator.Equality:
- return new BoolConstant (lv == rv, left.Location);
+ return new BoolConstant (ec.BuiltinTypes, lv == rv, left.Location);
case Binary.Operator.Inequality:
- return new BoolConstant (lv != rv, left.Location);
+ return new BoolConstant (ec.BuiltinTypes, lv != rv, left.Location);
}
return null;
}
// During an enum evaluation, none of the rules are valid
// Not sure whether it is bug in csc or in documentation
//
- if (ec.InEnumContext){
+ if (ec.HasSet (ResolveContext.Options.EnumScope)){
if (left is EnumConstant)
left = ((EnumConstant) left).Child;
case Binary.Operator.BitwiseOr:
case Binary.Operator.BitwiseAnd:
case Binary.Operator.ExclusiveOr:
- return BinaryFold (ec, oper, ((EnumConstant)left).Child,
- ((EnumConstant)right).Child, loc).TryReduce (ec, lt, loc);
+ result = BinaryFold (ec, oper, ((EnumConstant)left).Child, ((EnumConstant)right).Child, loc);
+ if (result != null)
+ result = result.Reduce (ec, lt);
+ return result;
///
/// U operator -(E x, E y);
///
case Binary.Operator.Subtraction:
result = BinaryFold (ec, oper, ((EnumConstant)left).Child, ((EnumConstant)right).Child, loc);
- return result.TryReduce (ec, ((EnumConstant)left).Child.Type, loc);
+ if (result != null)
+ result = result.Reduce (ec, EnumSpec.GetUnderlyingType (lt));
+ return result;
///
/// bool operator ==(E x, E y);
switch (oper){
case Binary.Operator.BitwiseOr:
- if (!DoBinaryNumericPromotions (ref left, ref right))
+ //
+ // bool? operator |(bool? x, bool? y);
+ //
+ if ((lt.BuiltinType == BuiltinTypeSpec.Type.Bool && right is NullLiteral) ||
+ (rt.BuiltinType == BuiltinTypeSpec.Type.Bool && left is NullLiteral)) {
+ var b = new Binary (oper, left, right).ResolveOperator (ec);
+
+ // false | null => null
+ // null | false => null
+ if ((right is NullLiteral && left.IsDefaultValue) || (left is NullLiteral && right.IsDefaultValue))
+ return Nullable.LiftedNull.CreateFromExpression (ec, b);
+
+ // true | null => true
+ // null | true => true
+ return ReducedExpression.Create (new BoolConstant (ec.BuiltinTypes, true, loc), b);
+ }
+
+ if (!DoBinaryNumericPromotions (ec, ref left, ref right))
return null;
if (left is IntConstant){
int res = ((IntConstant) left).Value | ((IntConstant) right).Value;
-
- return new IntConstant (res, left.Location);
+
+ return new IntConstant (ec.BuiltinTypes, res, left.Location);
}
if (left is UIntConstant){
uint res = ((UIntConstant)left).Value | ((UIntConstant)right).Value;
-
- return new UIntConstant (res, left.Location);
+
+ return new UIntConstant (ec.BuiltinTypes, res, left.Location);
}
if (left is LongConstant){
long res = ((LongConstant)left).Value | ((LongConstant)right).Value;
-
- return new LongConstant (res, left.Location);
+
+ return new LongConstant (ec.BuiltinTypes, res, left.Location);
}
if (left is ULongConstant){
ulong res = ((ULongConstant)left).Value |
((ULongConstant)right).Value;
-
- return new ULongConstant (res, left.Location);
+
+ return new ULongConstant (ec.BuiltinTypes, res, left.Location);
}
break;
case Binary.Operator.BitwiseAnd:
- if (!DoBinaryNumericPromotions (ref left, ref right))
+ //
+ // bool? operator &(bool? x, bool? y);
+ //
+ if ((lt.BuiltinType == BuiltinTypeSpec.Type.Bool && right is NullLiteral) ||
+ (rt.BuiltinType == BuiltinTypeSpec.Type.Bool && left is NullLiteral)) {
+ var b = new Binary (oper, left, right).ResolveOperator (ec);
+
+ // false & null => false
+ // null & false => false
+ if ((right is NullLiteral && left.IsDefaultValue) || (left is NullLiteral && right.IsDefaultValue))
+ return ReducedExpression.Create (new BoolConstant (ec.BuiltinTypes, false, loc), b);
+
+ // true & null => null
+ // null & true => null
+ return Nullable.LiftedNull.CreateFromExpression (ec, b);
+ }
+
+ if (!DoBinaryNumericPromotions (ec, ref left, ref right))
return null;
///
///
if (left is IntConstant){
int res = ((IntConstant) left).Value & ((IntConstant) right).Value;
- return new IntConstant (res, left.Location);
+ return new IntConstant (ec.BuiltinTypes, res, left.Location);
}
if (left is UIntConstant){
uint res = ((UIntConstant)left).Value & ((UIntConstant)right).Value;
- return new UIntConstant (res, left.Location);
+ return new UIntConstant (ec.BuiltinTypes, res, left.Location);
}
if (left is LongConstant){
long res = ((LongConstant)left).Value & ((LongConstant)right).Value;
- return new LongConstant (res, left.Location);
+ return new LongConstant (ec.BuiltinTypes, res, left.Location);
}
if (left is ULongConstant){
ulong res = ((ULongConstant)left).Value &
((ULongConstant)right).Value;
-
- return new ULongConstant (res, left.Location);
+
+ return new ULongConstant (ec.BuiltinTypes, res, left.Location);
}
break;
case Binary.Operator.ExclusiveOr:
- if (!DoBinaryNumericPromotions (ref left, ref right))
+ if (!DoBinaryNumericPromotions (ec, ref left, ref right))
return null;
if (left is IntConstant){
int res = ((IntConstant) left).Value ^ ((IntConstant) right).Value;
- return new IntConstant (res, left.Location);
+ return new IntConstant (ec.BuiltinTypes, res, left.Location);
}
if (left is UIntConstant){
uint res = ((UIntConstant)left).Value ^ ((UIntConstant)right).Value;
-
- return new UIntConstant (res, left.Location);
+
+ return new UIntConstant (ec.BuiltinTypes, res, left.Location);
}
if (left is LongConstant){
long res = ((LongConstant)left).Value ^ ((LongConstant)right).Value;
-
- return new LongConstant (res, left.Location);
+
+ return new LongConstant (ec.BuiltinTypes, res, left.Location);
}
if (left is ULongConstant){
ulong res = ((ULongConstant)left).Value ^
((ULongConstant)right).Value;
-
- return new ULongConstant (res, left.Location);
+
+ return new ULongConstant (ec.BuiltinTypes, res, left.Location);
}
break;
case Binary.Operator.Addition:
- if (lt == TypeManager.null_type)
- return right;
-
- if (rt == TypeManager.null_type)
- return left;
-
//
- // If both sides are strings, then concatenate, if
- // one is a string, and the other is not, then defer
- // to runtime concatenation
+ // If both sides are strings, then concatenate
//
- if (lt == TypeManager.string_type || rt == TypeManager.string_type){
+ // string operator + (string x, string y)
+ //
+ if (lt.BuiltinType == BuiltinTypeSpec.Type.String || rt.BuiltinType == BuiltinTypeSpec.Type.String){
if (lt == rt)
- return new StringConstant ((string)left.GetValue () + (string)right.GetValue (),
+ return new StringConstant (ec.BuiltinTypes, (string)left.GetValue () + (string)right.GetValue (),
left.Location);
-
+
+ if (lt == InternalType.NullLiteral)
+ return new StringConstant (ec.BuiltinTypes, "" + right.GetValue (), left.Location);
+
+ if (rt == InternalType.NullLiteral)
+ return new StringConstant (ec.BuiltinTypes, left.GetValue () + "", left.Location);
+
return null;
}
+ //
+ // string operator + (string x, object y)
+ //
+ if (lt == InternalType.NullLiteral) {
+ if (rt.BuiltinType == BuiltinTypeSpec.Type.Object)
+ return new StringConstant (ec.BuiltinTypes, "" + right.GetValue (), left.Location);
+
+ if (lt == rt) {
+ ec.Report.Error (34, loc, "Operator `{0}' is ambiguous on operands of type `{1}' and `{2}'",
+ "+", lt.GetSignatureForError (), rt.GetSignatureForError ());
+ return null;
+ }
+
+ return right;
+ }
+
+ //
+ // string operator + (object x, string y)
+ //
+ if (rt == InternalType.NullLiteral) {
+ if (lt.BuiltinType == BuiltinTypeSpec.Type.Object)
+ return new StringConstant (ec.BuiltinTypes, right.GetValue () + "", left.Location);
+
+ return left;
+ }
+
//
// handle "E operator + (E x, U y)"
// handle "E operator + (Y y, E x)"
if (result == null)
return null;
- result = result.TryReduce (ec, lt, loc);
+ result = result.Reduce (ec, lt);
if (result == null)
return null;
return new EnumConstant (result, lt);
}
- if (!DoBinaryNumericPromotions (ref left, ref right))
+ if (!DoBinaryNumericPromotions (ec, ref left, ref right))
return null;
try {
else
res = unchecked (((DoubleConstant) left).Value +
((DoubleConstant) right).Value);
-
- return new DoubleConstant (res, left.Location);
+
+ return new DoubleConstant (ec.BuiltinTypes, res, left.Location);
}
if (left is FloatConstant){
float res;
else
res = unchecked (((FloatConstant) left).Value +
((FloatConstant) right).Value);
-
- result = new FloatConstant (res, left.Location);
+
+ result = new FloatConstant (ec.BuiltinTypes, res, left.Location);
} else if (left is ULongConstant){
ulong res;
res = unchecked (((ULongConstant) left).Value +
((ULongConstant) right).Value);
- result = new ULongConstant (res, left.Location);
+ result = new ULongConstant (ec.BuiltinTypes, res, left.Location);
} else if (left is LongConstant){
long res;
else
res = unchecked (((LongConstant) left).Value +
((LongConstant) right).Value);
-
- result = new LongConstant (res, left.Location);
+
+ result = new LongConstant (ec.BuiltinTypes, res, left.Location);
} else if (left is UIntConstant){
uint res;
else
res = unchecked (((UIntConstant) left).Value +
((UIntConstant) right).Value);
-
- result = new UIntConstant (res, left.Location);
+
+ result = new UIntConstant (ec.BuiltinTypes, res, left.Location);
} else if (left is IntConstant){
int res;
res = unchecked (((IntConstant) left).Value +
((IntConstant) right).Value);
- result = new IntConstant (res, left.Location);
+ result = new IntConstant (ec.BuiltinTypes, res, left.Location);
} else if (left is DecimalConstant) {
decimal res;
res = unchecked (((DecimalConstant) left).Value +
((DecimalConstant) right).Value);
- result = new DecimalConstant (res, left.Location);
+ result = new DecimalConstant (ec.BuiltinTypes, res, left.Location);
}
} catch (OverflowException){
- Error_CompileTimeOverflow (loc);
+ Error_CompileTimeOverflow (ec, loc);
}
return result;
if (result == null)
return null;
- result = result.TryReduce (ec, lt, loc);
+ result = result.Reduce (ec, lt);
if (result == null)
return null;
return new EnumConstant (result, lt);
}
- if (!DoBinaryNumericPromotions (ref left, ref right))
+ if (left is NullLiteral && right is NullLiteral) {
+ var lifted_int = new Nullable.NullableType (ec.BuiltinTypes.Int, loc);
+ lifted_int.ResolveAsType (ec);
+ return (Constant) new Binary (oper, lifted_int, right).ResolveOperator (ec);
+ }
+
+ if (!DoBinaryNumericPromotions (ec, ref left, ref right))
return null;
try {
else
res = unchecked (((DoubleConstant) left).Value -
((DoubleConstant) right).Value);
-
- result = new DoubleConstant (res, left.Location);
+
+ result = new DoubleConstant (ec.BuiltinTypes, res, left.Location);
} else if (left is FloatConstant){
float res;
else
res = unchecked (((FloatConstant) left).Value -
((FloatConstant) right).Value);
-
- result = new FloatConstant (res, left.Location);
+
+ result = new FloatConstant (ec.BuiltinTypes, res, left.Location);
} else if (left is ULongConstant){
ulong res;
else
res = unchecked (((ULongConstant) left).Value -
((ULongConstant) right).Value);
-
- result = new ULongConstant (res, left.Location);
+
+ result = new ULongConstant (ec.BuiltinTypes, res, left.Location);
} else if (left is LongConstant){
long res;
else
res = unchecked (((LongConstant) left).Value -
((LongConstant) right).Value);
-
- result = new LongConstant (res, left.Location);
+
+ result = new LongConstant (ec.BuiltinTypes, res, left.Location);
} else if (left is UIntConstant){
uint res;
else
res = unchecked (((UIntConstant) left).Value -
((UIntConstant) right).Value);
-
- result = new UIntConstant (res, left.Location);
+
+ result = new UIntConstant (ec.BuiltinTypes, res, left.Location);
} else if (left is IntConstant){
int res;
res = unchecked (((IntConstant) left).Value -
((IntConstant) right).Value);
- result = new IntConstant (res, left.Location);
+ result = new IntConstant (ec.BuiltinTypes, res, left.Location);
} else if (left is DecimalConstant) {
decimal res;
res = unchecked (((DecimalConstant) left).Value -
((DecimalConstant) right).Value);
- return new DecimalConstant (res, left.Location);
+ return new DecimalConstant (ec.BuiltinTypes, res, left.Location);
} else {
throw new Exception ( "Unexepected subtraction input: " + left);
}
} catch (OverflowException){
- Error_CompileTimeOverflow (loc);
+ Error_CompileTimeOverflow (ec, loc);
}
return result;
case Binary.Operator.Multiply:
- if (!DoBinaryNumericPromotions (ref left, ref right))
+ if (left is NullLiteral && right is NullLiteral) {
+ var lifted_int = new Nullable.NullableType (ec.BuiltinTypes.Int, loc);
+ lifted_int.ResolveAsType (ec);
+ return (Constant) new Binary (oper, lifted_int, right).ResolveOperator (ec);
+ }
+
+ if (!DoBinaryNumericPromotions (ec, ref left, ref right))
return null;
try {
else
res = unchecked (((DoubleConstant) left).Value *
((DoubleConstant) right).Value);
-
- return new DoubleConstant (res, left.Location);
+
+ return new DoubleConstant (ec.BuiltinTypes, res, left.Location);
} else if (left is FloatConstant){
float res;
else
res = unchecked (((FloatConstant) left).Value *
((FloatConstant) right).Value);
-
- return new FloatConstant (res, left.Location);
+
+ return new FloatConstant (ec.BuiltinTypes, res, left.Location);
} else if (left is ULongConstant){
ulong res;
else
res = unchecked (((ULongConstant) left).Value *
((ULongConstant) right).Value);
-
- return new ULongConstant (res, left.Location);
+
+ return new ULongConstant (ec.BuiltinTypes, res, left.Location);
} else if (left is LongConstant){
long res;
else
res = unchecked (((LongConstant) left).Value *
((LongConstant) right).Value);
-
- return new LongConstant (res, left.Location);
+
+ return new LongConstant (ec.BuiltinTypes, res, left.Location);
} else if (left is UIntConstant){
uint res;
else
res = unchecked (((UIntConstant) left).Value *
((UIntConstant) right).Value);
-
- return new UIntConstant (res, left.Location);
+
+ return new UIntConstant (ec.BuiltinTypes, res, left.Location);
} else if (left is IntConstant){
int res;
res = unchecked (((IntConstant) left).Value *
((IntConstant) right).Value);
- return new IntConstant (res, left.Location);
+ return new IntConstant (ec.BuiltinTypes, res, left.Location);
} else if (left is DecimalConstant) {
decimal res;
res = unchecked (((DecimalConstant) left).Value *
((DecimalConstant) right).Value);
- return new DecimalConstant (res, left.Location);
+ return new DecimalConstant (ec.BuiltinTypes, res, left.Location);
} else {
throw new Exception ( "Unexepected multiply input: " + left);
}
} catch (OverflowException){
- Error_CompileTimeOverflow (loc);
+ Error_CompileTimeOverflow (ec, loc);
}
break;
case Binary.Operator.Division:
- if (!DoBinaryNumericPromotions (ref left, ref right))
+ if (left is NullLiteral && right is NullLiteral) {
+ var lifted_int = new Nullable.NullableType (ec.BuiltinTypes.Int, loc);
+ lifted_int.ResolveAsType (ec);
+ return (Constant) new Binary (oper, lifted_int, right).ResolveOperator (ec);
+ }
+
+ if (!DoBinaryNumericPromotions (ec, ref left, ref right))
return null;
try {
else
res = unchecked (((DoubleConstant) left).Value /
((DoubleConstant) right).Value);
-
- return new DoubleConstant (res, left.Location);
+
+ return new DoubleConstant (ec.BuiltinTypes, res, left.Location);
} else if (left is FloatConstant){
float res;
else
res = unchecked (((FloatConstant) left).Value /
((FloatConstant) right).Value);
-
- return new FloatConstant (res, left.Location);
+
+ return new FloatConstant (ec.BuiltinTypes, res, left.Location);
} else if (left is ULongConstant){
ulong res;
else
res = unchecked (((ULongConstant) left).Value /
((ULongConstant) right).Value);
-
- return new ULongConstant (res, left.Location);
+
+ return new ULongConstant (ec.BuiltinTypes, res, left.Location);
} else if (left is LongConstant){
long res;
else
res = unchecked (((LongConstant) left).Value /
((LongConstant) right).Value);
-
- return new LongConstant (res, left.Location);
+
+ return new LongConstant (ec.BuiltinTypes, res, left.Location);
} else if (left is UIntConstant){
uint res;
else
res = unchecked (((UIntConstant) left).Value /
((UIntConstant) right).Value);
-
- return new UIntConstant (res, left.Location);
+
+ return new UIntConstant (ec.BuiltinTypes, res, left.Location);
} else if (left is IntConstant){
int res;
res = unchecked (((IntConstant) left).Value /
((IntConstant) right).Value);
- return new IntConstant (res, left.Location);
+ return new IntConstant (ec.BuiltinTypes, res, left.Location);
} else if (left is DecimalConstant) {
decimal res;
res = unchecked (((DecimalConstant) left).Value /
((DecimalConstant) right).Value);
- return new DecimalConstant (res, left.Location);
+ return new DecimalConstant (ec.BuiltinTypes, res, left.Location);
} else {
throw new Exception ( "Unexepected division input: " + left);
}
} catch (OverflowException){
- Error_CompileTimeOverflow (loc);
+ Error_CompileTimeOverflow (ec, loc);
} catch (DivideByZeroException) {
- Report.Error (020, loc, "Division by constant zero");
+ ec.Report.Error (20, loc, "Division by constant zero");
}
break;
case Binary.Operator.Modulus:
- if (!DoBinaryNumericPromotions (ref left, ref right))
+ if (left is NullLiteral && right is NullLiteral) {
+ var lifted_int = new Nullable.NullableType (ec.BuiltinTypes.Int, loc);
+ lifted_int.ResolveAsType (ec);
+ return (Constant) new Binary (oper, lifted_int, right).ResolveOperator (ec);
+ }
+
+ if (!DoBinaryNumericPromotions (ec, ref left, ref right))
return null;
try {
else
res = unchecked (((DoubleConstant) left).Value %
((DoubleConstant) right).Value);
-
- return new DoubleConstant (res, left.Location);
+
+ return new DoubleConstant (ec.BuiltinTypes, res, left.Location);
} else if (left is FloatConstant){
float res;
else
res = unchecked (((FloatConstant) left).Value %
((FloatConstant) right).Value);
-
- return new FloatConstant (res, left.Location);
+
+ return new FloatConstant (ec.BuiltinTypes, res, left.Location);
} else if (left is ULongConstant){
ulong res;
else
res = unchecked (((ULongConstant) left).Value %
((ULongConstant) right).Value);
-
- return new ULongConstant (res, left.Location);
+
+ return new ULongConstant (ec.BuiltinTypes, res, left.Location);
} else if (left is LongConstant){
long res;
else
res = unchecked (((LongConstant) left).Value %
((LongConstant) right).Value);
-
- return new LongConstant (res, left.Location);
+
+ return new LongConstant (ec.BuiltinTypes, res, left.Location);
} else if (left is UIntConstant){
uint res;
else
res = unchecked (((UIntConstant) left).Value %
((UIntConstant) right).Value);
-
- return new UIntConstant (res, left.Location);
+
+ return new UIntConstant (ec.BuiltinTypes, res, left.Location);
} else if (left is IntConstant){
int res;
res = unchecked (((IntConstant) left).Value %
((IntConstant) right).Value);
- return new IntConstant (res, left.Location);
+ return new IntConstant (ec.BuiltinTypes, res, left.Location);
} else {
throw new Exception ( "Unexepected modulus input: " + left);
}
} catch (DivideByZeroException){
- Report.Error (020, loc, "Division by constant zero");
+ ec.Report.Error (20, loc, "Division by constant zero");
} catch (OverflowException){
- Error_CompileTimeOverflow (loc);
+ Error_CompileTimeOverflow (ec, loc);
}
break;
// There is no overflow checking on left shift
//
case Binary.Operator.LeftShift:
- IntConstant ic = right.ConvertImplicitly (TypeManager.int32_type) as IntConstant;
+ if (left is NullLiteral && right is NullLiteral) {
+ var lifted_int = new Nullable.NullableType (ec.BuiltinTypes.Int, loc);
+ lifted_int.ResolveAsType (ec);
+ return (Constant) new Binary (oper, lifted_int, right).ResolveOperator (ec);
+ }
+
+ IntConstant ic = right.ConvertImplicitly (ec.BuiltinTypes.Int) as IntConstant;
if (ic == null){
- Binary.Error_OperatorCannotBeApplied (left, right, oper, loc);
+ Binary.Error_OperatorCannotBeApplied (ec, left, right, oper, loc);
return null;
}
int lshift_val = ic.Value;
- if (left.Type == TypeManager.uint64_type)
- return new ULongConstant (((ULongConstant)left).Value << lshift_val, left.Location);
- if (left.Type == TypeManager.int64_type)
- return new LongConstant (((LongConstant)left).Value << lshift_val, left.Location);
- if (left.Type == TypeManager.uint32_type)
- return new UIntConstant (((UIntConstant)left).Value << lshift_val, left.Location);
-
- left = left.ConvertImplicitly (TypeManager.int32_type);
- if (left.Type == TypeManager.int32_type)
- return new IntConstant (((IntConstant)left).Value << lshift_val, left.Location);
-
- Binary.Error_OperatorCannotBeApplied (left, right, oper, loc);
+ switch (left.Type.BuiltinType) {
+ case BuiltinTypeSpec.Type.ULong:
+ return new ULongConstant (ec.BuiltinTypes, ((ULongConstant) left).Value << lshift_val, left.Location);
+ case BuiltinTypeSpec.Type.Long:
+ return new LongConstant (ec.BuiltinTypes, ((LongConstant) left).Value << lshift_val, left.Location);
+ case BuiltinTypeSpec.Type.UInt:
+ return new UIntConstant (ec.BuiltinTypes, ((UIntConstant) left).Value << lshift_val, left.Location);
+ }
+
+ // null << value => null
+ if (left is NullLiteral)
+ return (Constant) new Binary (oper, left, right).ResolveOperator (ec);
+
+ left = left.ConvertImplicitly (ec.BuiltinTypes.Int);
+ if (left.Type.BuiltinType == BuiltinTypeSpec.Type.Int)
+ return new IntConstant (ec.BuiltinTypes, ((IntConstant) left).Value << lshift_val, left.Location);
+
+ Binary.Error_OperatorCannotBeApplied (ec, left, right, oper, loc);
break;
//
// There is no overflow checking on right shift
//
case Binary.Operator.RightShift:
- IntConstant sic = right.ConvertImplicitly (TypeManager.int32_type) as IntConstant;
+ if (left is NullLiteral && right is NullLiteral) {
+ var lifted_int = new Nullable.NullableType (ec.BuiltinTypes.Int, loc);
+ lifted_int.ResolveAsType (ec);
+ return (Constant) new Binary (oper, lifted_int, right).ResolveOperator (ec);
+ }
+
+ IntConstant sic = right.ConvertImplicitly (ec.BuiltinTypes.Int) as IntConstant;
if (sic == null){
- Binary.Error_OperatorCannotBeApplied (left, right, oper, loc); ;
+ Binary.Error_OperatorCannotBeApplied (ec, left, right, oper, loc);
return null;
}
int rshift_val = sic.Value;
- if (left.Type == TypeManager.uint64_type)
- return new ULongConstant (((ULongConstant)left).Value >> rshift_val, left.Location);
- if (left.Type == TypeManager.int64_type)
- return new LongConstant (((LongConstant)left).Value >> rshift_val, left.Location);
- if (left.Type == TypeManager.uint32_type)
- return new UIntConstant (((UIntConstant)left).Value >> rshift_val, left.Location);
-
- left = left.ConvertImplicitly (TypeManager.int32_type);
- if (left.Type == TypeManager.int32_type)
- return new IntConstant (((IntConstant)left).Value >> rshift_val, left.Location);
-
- Binary.Error_OperatorCannotBeApplied (left, right, oper, loc);
+ switch (left.Type.BuiltinType) {
+ case BuiltinTypeSpec.Type.ULong:
+ return new ULongConstant (ec.BuiltinTypes, ((ULongConstant) left).Value >> rshift_val, left.Location);
+ case BuiltinTypeSpec.Type.Long:
+ return new LongConstant (ec.BuiltinTypes, ((LongConstant) left).Value >> rshift_val, left.Location);
+ case BuiltinTypeSpec.Type.UInt:
+ return new UIntConstant (ec.BuiltinTypes, ((UIntConstant) left).Value >> rshift_val, left.Location);
+ }
+
+ // null >> value => null
+ if (left is NullLiteral)
+ return (Constant) new Binary (oper, left, right).ResolveOperator (ec);
+
+ left = left.ConvertImplicitly (ec.BuiltinTypes.Int);
+ if (left.Type.BuiltinType == BuiltinTypeSpec.Type.Int)
+ return new IntConstant (ec.BuiltinTypes, ((IntConstant) left).Value >> rshift_val, left.Location);
+
+ Binary.Error_OperatorCannotBeApplied (ec, left, right, oper, loc);
break;
case Binary.Operator.Equality:
- if (left is NullLiteral){
- if (right is NullLiteral)
- return new BoolConstant (true, left.Location);
- else if (right is StringConstant)
- return new BoolConstant (
- ((StringConstant) right).Value == null, left.Location);
- } else if (right is NullLiteral) {
- if (left is NullLiteral)
- return new BoolConstant (true, left.Location);
- else if (left is StringConstant)
- return new BoolConstant (
- ((StringConstant) left).Value == null, left.Location);
- }
- if (left is StringConstant && right is StringConstant){
- return new BoolConstant (
- ((StringConstant) left).Value ==
- ((StringConstant) right).Value, left.Location);
-
+ if (TypeSpec.IsReferenceType (lt) && TypeSpec.IsReferenceType (rt) ||
+ (left is Nullable.LiftedNull && right.IsNull) ||
+ (right is Nullable.LiftedNull && left.IsNull)) {
+ if (left.IsNull || right.IsNull) {
+ return ReducedExpression.Create (
+ new BoolConstant (ec.BuiltinTypes, left.IsNull == right.IsNull, left.Location),
+ new Binary (oper, left, right));
+ }
+
+ if (left is StringConstant && right is StringConstant)
+ return new BoolConstant (ec.BuiltinTypes,
+ ((StringConstant) left).Value == ((StringConstant) right).Value, left.Location);
+
+ return null;
}
- if (!DoBinaryNumericPromotions (ref left, ref right))
+ if (!DoBinaryNumericPromotions (ec, ref left, ref right))
return null;
bool_res = false;
else
return null;
- return new BoolConstant (bool_res, left.Location);
+ return new BoolConstant (ec.BuiltinTypes, bool_res, left.Location);
case Binary.Operator.Inequality:
- if (left is NullLiteral) {
- if (right is NullLiteral)
- return new BoolConstant (false, left.Location);
- else if (right is StringConstant)
- return new BoolConstant (
- ((StringConstant) right).Value != null, left.Location);
- } else if (right is NullLiteral) {
- if (left is NullLiteral)
- return new BoolConstant (false, left.Location);
- else if (left is StringConstant)
- return new BoolConstant (
- ((StringConstant) left).Value != null, left.Location);
- }
- if (left is StringConstant && right is StringConstant){
- return new BoolConstant (
- ((StringConstant) left).Value !=
- ((StringConstant) right).Value, left.Location);
-
+ if (TypeSpec.IsReferenceType (lt) && TypeSpec.IsReferenceType (rt) ||
+ (left is Nullable.LiftedNull && right.IsNull) ||
+ (right is Nullable.LiftedNull && left.IsNull)) {
+ if (left.IsNull || right.IsNull) {
+ return ReducedExpression.Create (
+ new BoolConstant (ec.BuiltinTypes, left.IsNull != right.IsNull, left.Location),
+ new Binary (oper, left, right));
+ }
+
+ if (left is StringConstant && right is StringConstant)
+ return new BoolConstant (ec.BuiltinTypes,
+ ((StringConstant) left).Value != ((StringConstant) right).Value, left.Location);
+
+ return null;
}
- if (!DoBinaryNumericPromotions (ref left, ref right))
+ if (!DoBinaryNumericPromotions (ec, ref left, ref right))
return null;
bool_res = false;
else
return null;
- return new BoolConstant (bool_res, left.Location);
+ return new BoolConstant (ec.BuiltinTypes, bool_res, left.Location);
case Binary.Operator.LessThan:
- if (!DoBinaryNumericPromotions (ref left, ref right))
+ if (right is NullLiteral) {
+ if (left is NullLiteral) {
+ var lifted_int = new Nullable.NullableType (ec.BuiltinTypes.Int, loc);
+ lifted_int.ResolveAsType (ec);
+ return (Constant) new Binary (oper, lifted_int, right).ResolveOperator (ec);
+ }
+ }
+
+ if (!DoBinaryNumericPromotions (ec, ref left, ref right))
return null;
bool_res = false;
else
return null;
- return new BoolConstant (bool_res, left.Location);
+ return new BoolConstant (ec.BuiltinTypes, bool_res, left.Location);
case Binary.Operator.GreaterThan:
- if (!DoBinaryNumericPromotions (ref left, ref right))
+ if (right is NullLiteral) {
+ if (left is NullLiteral) {
+ var lifted_int = new Nullable.NullableType (ec.BuiltinTypes.Int, loc);
+ lifted_int.ResolveAsType (ec);
+ return (Constant) new Binary (oper, lifted_int, right).ResolveOperator (ec);
+ }
+ }
+
+ if (!DoBinaryNumericPromotions (ec, ref left, ref right))
return null;
bool_res = false;
else
return null;
- return new BoolConstant (bool_res, left.Location);
+ return new BoolConstant (ec.BuiltinTypes, bool_res, left.Location);
case Binary.Operator.GreaterThanOrEqual:
- if (!DoBinaryNumericPromotions (ref left, ref right))
+ if (right is NullLiteral) {
+ if (left is NullLiteral) {
+ var lifted_int = new Nullable.NullableType (ec.BuiltinTypes.Int, loc);
+ lifted_int.ResolveAsType (ec);
+ return (Constant) new Binary (oper, lifted_int, right).ResolveOperator (ec);
+ }
+ }
+
+ if (!DoBinaryNumericPromotions (ec, ref left, ref right))
return null;
bool_res = false;
else
return null;
- return new BoolConstant (bool_res, left.Location);
+ return new BoolConstant (ec.BuiltinTypes, bool_res, left.Location);
case Binary.Operator.LessThanOrEqual:
- if (!DoBinaryNumericPromotions (ref left, ref right))
+ if (right is NullLiteral) {
+ if (left is NullLiteral) {
+ var lifted_int = new Nullable.NullableType (ec.BuiltinTypes.Int, loc);
+ lifted_int.ResolveAsType (ec);
+ return (Constant) new Binary (oper, lifted_int, right).ResolveOperator (ec);
+ }
+ }
+
+ if (!DoBinaryNumericPromotions (ec, ref left, ref right))
return null;
bool_res = false;
else
return null;
- return new BoolConstant (bool_res, left.Location);
+ return new BoolConstant (ec.BuiltinTypes, bool_res, left.Location);
}
return null;
projects / mono.git / blobdiff