private void ProcessPrefixPostfixOperators(ExpressionSyntax operand, OpCode opCode, bool isPrefix)
{
Visit(operand);
InjectRequiredConversions(operand);
var assignmentVisitor = new AssignmentVisitor(Context, ilVar);
var operandInfo = Context.SemanticModel.GetSymbolInfo(operand);
if (operandInfo.Symbol != null && operandInfo.Symbol.Kind != SymbolKind.Field && operandInfo.Symbol.Kind != SymbolKind.Property) // Fields / Properties requires more complex handling to load the owning reference.
{
if (!isPrefix) // For *postfix* operators we duplicate the value *before* applying the operator...
{
AddCilInstruction(ilVar, OpCodes.Dup);
}
AddCilInstruction(ilVar, OpCodes.Ldc_I4_1);
AddCilInstruction(ilVar, opCode);
if (isPrefix) // For prefix operators we duplicate the value *after* applying the operator...
{
AddCilInstruction(ilVar, OpCodes.Dup);
}
//assign (top of stack to the operand)
assignmentVisitor.InstructionPrecedingValueToLoad = Context.CurrentLine;
operand.Accept(assignmentVisitor);
return;
}
var tempLocalName = MethodExtensions.LocalVariableNameFor("tmp_", "tmp_".UniqueId().ToString());
AddCecilExpression($"var {tempLocalName} = new VariableDefinition({Context.TypeResolver.Resolve(Context.SemanticModel.GetTypeInfo(operand).Type)});");
AddCecilExpression($"{Context.DefinitionVariables.GetLastOf(MemberKind.Method).VariableName}.Body.Variables.Add({tempLocalName});");
if (isPrefix)
{
AddCilInstruction(ilVar, OpCodes.Ldc_I4_1);
AddCilInstruction(ilVar, opCode);
}
AddCilInstruction(ilVar, OpCodes.Stloc, tempLocalName);
AddCilInstruction(ilVar, OpCodes.Ldloc, tempLocalName);
assignmentVisitor.InstructionPrecedingValueToLoad = Context.CurrentLine;
AddCilInstruction(ilVar, OpCodes.Ldloc, tempLocalName);
if (!isPrefix)
{
AddCilInstruction(ilVar, OpCodes.Ldc_I4_1);
AddCilInstruction(ilVar, opCode);
}
// assign (top of stack to the operand)
operand.Accept(assignmentVisitor);
}
public override void VisitAssignmentExpression(AssignmentExpressionSyntax node)
{
var leftNodeMae = node.Left as MemberAccessExpressionSyntax;
CSharpSyntaxNode exp = leftNodeMae != null ? leftNodeMae.Name : node.Left;
if (Context.SemanticModel.GetSymbolInfo(exp).Symbol?.Kind == SymbolKind.Property) // check if the left hand side of the assignment is a property and handle that as a method (set) call.
{
HandleMethodInvocation(node.Left, node.Right);
return;
}
var visitor = new AssignmentVisitor(Context, ilVar, node);
visitor.InstructionPrecedingValueToLoad = Context.CurrentLine;
Visit(node.Right);
if (!valueTypeNoArgObjCreation)
{
visitor.Visit(node.Left);
}
}
