EmitUnary()

void System.Linq.Expressions.Compiler.LambdaCompiler.EmitUnary ( UnaryExpression node, CompilationFlags flags )

inlineprivate

Definition at line 3469 of file LambdaCompiler.cs.

    {
        if (node.Method != null)
        {
            EmitUnaryMethod(node, flags);
        }
        else if (node.NodeType == ExpressionType.NegateChecked && node.Operand.Type.IsInteger())
        {
            Type type = node.Type;
            if (type.IsNullableType())
            {
                Label label = _ilg.DefineLabel();
                Label label2 = _ilg.DefineLabel();
                EmitExpression(node.Operand);
                LocalBuilder local = GetLocal(type);
                _ilg.Emit(OpCodes.Stloc, local);
                _ilg.Emit(OpCodes.Ldloca, local);
                _ilg.EmitGetValueOrDefault(type);
                _ilg.Emit(OpCodes.Brfalse_S, label);
                Type nonNullableType = type.GetNonNullableType();
                _ilg.EmitDefault(nonNullableType, null);
                _ilg.Emit(OpCodes.Ldloca, local);
                _ilg.EmitGetValueOrDefault(type);
                EmitBinaryOperator(ExpressionType.SubtractChecked, nonNullableType, nonNullableType, nonNullableType, liftedToNull: false);
                _ilg.Emit(OpCodes.Newobj, TypeUtils.GetNullableConstructor(type));
                _ilg.Emit(OpCodes.Br_S, label2);
                _ilg.MarkLabel(label);
                _ilg.Emit(OpCodes.Ldloc, local);
                FreeLocal(local);
                _ilg.MarkLabel(label2);
            }
            else
            {
                _ilg.EmitDefault(type, null);
                EmitExpression(node.Operand);
                EmitBinaryOperator(ExpressionType.SubtractChecked, type, type, type, liftedToNull: false);
            }
        }
        else
        {
            EmitExpression(node.Operand);
            EmitUnaryOperator(node.NodeType, node.Operand.Type, node.Type);
        }
    }

References System.Linq.Expressions.Compiler.LambdaCompiler._ilg, System.Reflection.Emit.OpCodes.Br_S, System.Reflection.Emit.OpCodes.Brfalse_S, System.Reflection.Emit.ILGenerator.DefineLabel(), System.Reflection.Emit.ILGenerator.Emit(), System.Linq.Expressions.Compiler.LambdaCompiler.EmitBinaryOperator(), System.Linq.Expressions.Compiler.LambdaCompiler.EmitExpression(), System.Linq.Expressions.Compiler.LambdaCompiler.EmitUnaryMethod(), System.Linq.Expressions.Compiler.LambdaCompiler.EmitUnaryOperator(), System.Linq.Expressions.Compiler.LambdaCompiler.FreeLocal(), System.Linq.Expressions.Compiler.LambdaCompiler.GetLocal(), System.Dynamic.Utils.TypeUtils.GetNullableConstructor(), System.Reflection.Emit.OpCodes.Ldloc, System.Reflection.Emit.OpCodes.Ldloca, System.Reflection.Emit.ILGenerator.MarkLabel(), System.Reflection.Emit.OpCodes.Newobj, System.Reflection.Emit.OpCodes.Stloc, and System.type.

Referenced by System.Linq.Expressions.Compiler.LambdaCompiler.EmitUnaryExpression().