private MidExp EmitExpImpl(ResBreakExp exp, MidEmitEnv env)
{
MidLabel label = env.Lookup(exp.Label);
MidVal val = EmitVal(exp.Value, env);
return(new MidBreakExp(exp.Range, label, val));
}
public MidBreakExp(
SourceRange range,
MidLabel label,
MidVal value)
: base(range, new MidVoidType())
{
_label = label;
_value = value;
}
public MidBreakExp(
SourceRange range,
MidLabel label,
MidVal value)
: base(range, new MidVoidType())
{
_label = label;
_value = value;
}
public MidLabelExp(
SourceRange range,
MidLabel label,
MidExp body,
MidType type)
: base(range, type)
{
_label = label;
_body = body;
}
private MidExp EmitExpImpl(ResLabelExp exp, MidEmitEnv env)
{
var midType = EmitTypeExp(exp.Type, env);
var localEnv = new MidLocalEmitEnv(env, _identifiers, null, _exps);
var midLabel = new MidLabel();
localEnv.Insert(exp.Label, midLabel);
var midBody = EmitLocalExp(exp.Body, localEnv);
midBody = localEnv.Wrap(midBody);
return(new MidLabelExp(
exp.Range,
midLabel,
midBody,
midType));
}
private bool UsesLabel(
MidExp exp,
MidLabel label)
{
bool result = false;
var transform = new MidTransform(
(e) =>
{
if (e is MidBreakExp && (e as MidBreakExp).Label == label)
{
result = true;
}
return(e);
});
transform.Transform(exp);
return(result);
}
void ReleaseDesignerOutlets()
{
if (KeyLabel != null)
{
KeyLabel.Dispose();
KeyLabel = null;
}
if (MidLabel != null)
{
MidLabel.Dispose();
MidLabel = null;
}
if (ValueLabel != null)
{
ValueLabel.Dispose();
ValueLabel = null;
}
}
public BreakLabel(
MidLabel midLabel,
EmitContextHLSL context,
EmitValHLSL resultVar)
{
_midLabel = midLabel;
_context = context;
_resultVar = resultVar;
}
private bool UsesLabel(
MidExp exp,
MidLabel label)
{
bool result = false;
var transform = new MidTransform(
(e) =>
{
if (e is MidBreakExp && (e as MidBreakExp).Label == label)
result = true;
return e;
});
transform.Transform(exp);
return result;
}
public MidLabelExp(
SourceRange range,
MidLabel label,
MidExp body,
MidType type)
: base(range, type)
{
_label = label;
_body = body;
}
public void Insert(ResLabel key, MidLabel value)
{
_labels[key] = value;
}