public override void Emit(CodeGen cg)
{
Label eol = cg.DefineLabel();
Label breakTarget = cg.DefineLabel();
Label continueTarget = cg.DefineLabel();
cg.EmitPosition(start, header);
list.Emit(cg);
cg.EmitCall(typeof(Ops), "GetEnumerator");
Slot iter;
if (cg.IsGenerator())
{
iter = cg.Names.GetTempSlot("iter", typeof(IEnumerator));
}
else
{
iter = cg.GetLocalTmp(typeof(IEnumerator));
}
iter.EmitSet(cg);
cg.MarkLabel(continueTarget);
iter.EmitGet(cg);
cg.EmitCall(typeof(IEnumerator), "MoveNext");
cg.Emit(OpCodes.Brfalse, eol);
cg.PushTargets(breakTarget, continueTarget);
iter.EmitGet(cg);
cg.EmitCall(typeof(IEnumerator).GetProperty("Current").GetGetMethod());
lhs.EmitSet(cg);
body.Emit(cg);
cg.Emit(OpCodes.Br, continueTarget);
cg.PopTargets();
cg.MarkLabel(eol);
if (elseStmt != null)
{
elseStmt.Emit(cg);
}
cg.MarkLabel(breakTarget);
if (cg.IsGenerator())
{
//!!! need to free my temp
}
else
{
cg.FreeLocalTmp(iter);
}
}
public override void Emit(CodeGen cg)
{
cg.EmitPosition(start, end);
// if lhs is a complex expression (eg foo[x] or foo.bar)
// then it's EmitSet needs to do the right thing.
lhs.Emit(cg);
rhs.Emit(cg);
op.EmitInPlace(cg);
lhs.EmitSet(cg);
}
private void EmitTupleParams(CodeGen cg)
{
for (int i = 0; i < parameters.Length; i++)
{
Expr p = parameters[i];
if (p is NameExpr)
{
continue;
}
//!!! not too clean
cg.Names[EncodeTupleParamName(p as TupleExpr)].EmitGet(cg);
p.EmitSet(cg);
}
}
public override void EmitSet(CodeGen cg)
{
expr.EmitSet(cg);
}
