/// <summary>Checks if this operation is part of a set operation.</summary>
/// <returns>True if a set operation is anywhere in the hierarchy of this operation; false otherwise.</returns>
public bool IsSet()
{
CodeFragment current = ParentFragment;
while (current != null)
{
SetOperation set = current as SetOperation;
if (set != null)
{
return(true);
}
current = current.ParentFragment;
}
return(false);
}
public override void OutputIL(NitroIL into)
{
// Emit any set operations before the block itself (e.g. i=0):
for (int i = 0; i < Parameters.Length; i++)
{
CompiledFragment parameter = Parameters[i];
if (Types.IsTypeOf(parameter, typeof(SetOperation)))
{
// Make sure it isn't a self set - e.g. i++, i=i+10.
SetOperation set = (SetOperation)parameter;
if (!set.SelfReferencing())
{
set.OutputIL(into);
Parameters[i] = null;
}
else
{
set.Output = false;
}
}
else
{
// Compute it's output type:
// Note that this must NOT be done for the SET ops as it makes them think
// We want to use their output, which isn't true!
parameter.OutputType(out parameter);
Parameters[i] = parameter;
}
}
Label continuePoint = into.DefineLabel();
Label start = into.DefineLabel();
Label end = into.DefineLabel();
Method.AddBreakPoint(new BreakPoint(continuePoint, end));
into.MarkLabel(start);
// Logical operations (e.g. i<10):
for (int i = 0; i < Parameters.Length; i++)
{
CompiledFragment parameter = Parameters[i];
if (parameter == null)
{
continue;
}
if (Types.IsTypeOf(parameter, typeof(SetOperation)))
{
// Just checking for a logical operation will make an incremental (i++) operation think
// It's being daisy chained. That's because its output type is checked for boolean in IsLogical.
continue;
}
if (parameter.IsLogical())
{
parameter.OutputIL(into);
into.Emit(OpCodes.Brfalse, end);
Parameters[i] = null;
}
}
Body.CompileBody(Method);
into.MarkLabel(continuePoint);
// Increment/decrement ops (e.g. i++):
for (int i = 0; i < Parameters.Length; i++)
{
CompiledFragment cfrag = Parameters[i];
if (cfrag == null)
{
continue;
}
cfrag.OutputIL(into);
}
into.Emit(OpCodes.Br, start);
into.MarkLabel(end);
Method.PopBreakPoint();
}