public override void Emit(EmitContext ec) { var call = new CallEmitter(); call.InstanceExpression = Child; call.EmitPredefined(ec, NullableInfo.GetValue(Child.Type), null); }
public override void Emit(EmitContext ec) { Label is_null_label = ec.DefineLabel(); Label end_label = ec.DefineLabel(); unwrap.EmitCheck(ec); ec.Emit(OpCodes.Brfalse, is_null_label); if (user_operator != null) { user_operator.Emit(ec); } else { EmitOperator(ec, NullableInfo.GetUnderlyingType(type)); } ec.Emit(OpCodes.Newobj, NullableInfo.GetConstructor(type)); ec.Emit(OpCodes.Br_S, end_label); ec.MarkLabel(is_null_label); LiftedNull.Create(type, loc).Emit(ec); ec.MarkLabel(end_label); }
protected override void EmitOperation(EmitContext ec) { Label is_null_label = ec.DefineLabel(); Label end_label = ec.DefineLabel(); LocalTemporary lt = new LocalTemporary(type); // Value is on the stack lt.Store(ec); var call = new CallEmitter(); call.InstanceExpression = lt; call.EmitPredefined(ec, NullableInfo.GetHasValue(expr.Type), null); ec.Emit(OpCodes.Brfalse, is_null_label); call = new CallEmitter(); call.InstanceExpression = lt; call.EmitPredefined(ec, NullableInfo.GetGetValueOrDefault(expr.Type), null); lt.Release(ec); base.EmitOperation(ec); ec.Emit(OpCodes.Newobj, NullableInfo.GetConstructor(type)); ec.Emit(OpCodes.Br_S, end_label); ec.MarkLabel(is_null_label); LiftedNull.Create(type, loc).Emit(ec); ec.MarkLabel(end_label); }
Unwrap(Expression expr, bool useDefaultValue) { this.expr = expr; this.loc = expr.Location; this.useDefaultValue = useDefaultValue; type = NullableInfo.GetUnderlyingType(expr.Type); eclass = expr.eclass; }
public void EmitCheck(EmitContext ec) { Store(ec); var call = new CallEmitter(); call.InstanceExpression = this; call.EmitPredefined(ec, NullableInfo.GetHasValue(expr.Type), null); }
protected override Expression DoResolve(ResolveContext rc) { base.DoResolve(rc); if (type != null) { type = NullableInfo.GetUnderlyingType(type); } return(this); }
public static Expression Create(Expression expr, TypeSpec type) { // // Avoid unwraping and wraping of the same type // Unwrap unwrap = expr as Unwrap; if (unwrap != null && expr.Type == NullableInfo.GetUnderlyingType(type)) { return(unwrap.Original); } return(new Wrap(expr, type)); }
protected override void EmitOperator(EmitContext ec, TypeSpec l) { if (user_operator != null) { user_operator.Emit(ec); return; } if (left.Type.IsNullableType) { l = NullableInfo.GetUnderlyingType(left.Type); left = EmptyCast.Create(left, l); } if (right.Type.IsNullableType) { right = EmptyCast.Create(right, NullableInfo.GetUnderlyingType(right.Type)); } base.EmitOperator(ec, l); }
public override void Emit(EmitContext ec) { Store(ec); var call = new CallEmitter(); call.InstanceExpression = this; // // Using GetGetValueOrDefault is prefered because JIT can possibly // inline it whereas Value property contains a throw which is very // unlikely to be inlined // if (useDefaultValue) { call.EmitPredefined(ec, NullableInfo.GetGetValueOrDefault(expr.Type), null); } else { call.EmitPredefined(ec, NullableInfo.GetValue(expr.Type), null); } }
void EmitBitwiseBoolean(EmitContext ec) { Label load_left = ec.DefineLabel(); Label load_right = ec.DefineLabel(); Label end_label = ec.DefineLabel(); // null & value, null | value if (left_unwrap == null) { left_unwrap = right_unwrap; right_unwrap = null; right = left; } left_unwrap.Emit(ec); ec.Emit(OpCodes.Brtrue, load_right); // value & null, value | null if (right_unwrap != null) { right_unwrap.Emit(ec); ec.Emit(OpCodes.Brtrue_S, load_left); } left_unwrap.EmitCheck(ec); ec.Emit(OpCodes.Brfalse_S, load_right); // load left ec.MarkLabel(load_left); if (Oper == Operator.BitwiseAnd) { left_unwrap.Load(ec); } else { if (right_unwrap == null) { right.Emit(ec); if (right is EmptyConstantCast || right is EmptyCast) { ec.Emit(OpCodes.Newobj, NullableInfo.GetConstructor(type)); } } else { right_unwrap.Load(ec); right_unwrap = left_unwrap; } } ec.Emit(OpCodes.Br_S, end_label); // load right ec.MarkLabel(load_right); if (right_unwrap == null) { if (Oper == Operator.BitwiseAnd) { right.Emit(ec); if (right is EmptyConstantCast || right is EmptyCast) { ec.Emit(OpCodes.Newobj, NullableInfo.GetConstructor(type)); } } else { left_unwrap.Load(ec); } } else { right_unwrap.Load(ec); } ec.MarkLabel(end_label); }
public override void Emit(EmitContext ec) { child.Emit(ec); ec.Emit(OpCodes.Newobj, NullableInfo.GetConstructor(type)); }
Expression LiftResult(ResolveContext ec, Expression res_expr) { TypeSpec lifted_type; // // Avoid double conversion // if (left_unwrap == null || IsLeftNullLifted || left_unwrap.Type != left.Type || (left_unwrap != null && IsRightNullLifted)) { lifted_type = new NullableType(left.Type, loc).ResolveAsType(ec); if (lifted_type == null) { return(null); } if (left is UserCast || left is EmptyCast || left is OpcodeCast) { left.Type = lifted_type; } else { left = EmptyCast.Create(left, lifted_type); } } if (left != right && (right_unwrap == null || IsRightNullLifted || right_unwrap.Type != right.Type || (right_unwrap != null && IsLeftNullLifted))) { lifted_type = new NullableType(right.Type, loc).ResolveAsType(ec); if (lifted_type == null) { return(null); } var r = right; if (r is ReducedExpression) { r = ((ReducedExpression)r).OriginalExpression; } if (r is UserCast || r is EmptyCast || r is OpcodeCast) { r.Type = lifted_type; } else { right = EmptyCast.Create(right, lifted_type); } } if ((Oper & Operator.ComparisonMask) == 0) { lifted_type = new NullableType(res_expr.Type, loc).ResolveAsType(ec); if (lifted_type == null) { return(null); } wrap_ctor = NullableInfo.GetConstructor(lifted_type); type = res_expr.Type = lifted_type; } if (IsLeftNullLifted) { left = LiftedNull.Create(right.Type, left.Location); // // Special case for bool?, the result depends on both null right side and left side value // if ((Oper == Operator.BitwiseAnd || Oper == Operator.BitwiseOr) && NullableInfo.GetUnderlyingType(type).BuiltinType == BuiltinTypeSpec.Type.Bool) { return(res_expr); } if ((Oper & (Operator.ArithmeticMask | Operator.ShiftMask | Operator.BitwiseMask)) != 0) { return(LiftedNull.CreateFromExpression(ec, res_expr)); } // // Value types and null comparison // if (right_unwrap == null || (Oper & Operator.RelationalMask) != 0) { return(CreateNullConstant(ec, right_orig)); } } if (IsRightNullLifted) { right = LiftedNull.Create(left.Type, right.Location); // // Special case for bool?, the result depends on both null right side and left side value // if ((Oper == Operator.BitwiseAnd || Oper == Operator.BitwiseOr) && NullableInfo.GetUnderlyingType(type).BuiltinType == BuiltinTypeSpec.Type.Bool) { return(res_expr); } if ((Oper & (Operator.ArithmeticMask | Operator.ShiftMask | Operator.BitwiseMask)) != 0) { return(LiftedNull.CreateFromExpression(ec, res_expr)); } // // Value types and null comparison // if (left_unwrap == null || (Oper & Operator.RelationalMask) != 0) { return(CreateNullConstant(ec, left_orig)); } } return(res_expr); }