void ILinqOperator.Define(MethodBody method, Instruction jumpInstruction)
{
var processor = method.GetILProcessor();
var returnType = funcMethod.Method.ReturnType;
converted = converted ?? InstructionHelper.ConvertFunction(funcMethod, forLoop);
if (!TypeReferenceEquals(returnType, forLoop.LocalDefinition.VariableType))
{
forLoop.LocalDefinition = method.AddVariable(returnType);
}
foreach (var instruction in converted)
{
processor.Append(instruction);
}
processor.Append(InstructionHelper.StLoc(forLoop.LocalDefinition));
}
void ILinqOperator.Define(MethodBody method, Instruction jumpInstruction)
{
var checkVariable = method.AddVariableDefinition(typeSystem.Boolean);
var processor = method.GetILProcessor();
converted ??= InstructionHelper.ConvertFunction(funcMethod, forLoop);
foreach (var instruction in converted)
{
processor.Append(instruction);
}
processor.Append(InstructionHelper.StLoc(checkVariable));
processor.Append(InstructionHelper.LdLoc(checkVariable));
//true
processor.Emit(OpCodes.Brfalse_S, jumpInstruction);
//continue
processor.Emit(OpCodes.Br_S, forLoop.IncrementIndex);
}
Instruction ILinqOperator.Next()
{
converted = InstructionHelper.ConvertFunction(funcMethod, forLoop);
return(converted[0]);
}