public override IExpression Visit(IExpression expression)
{
Pop pop = expression as Pop;
if (pop != null)
{
if (this.numberOfPopsToIgnore-- > 0)
{
return(expression);
}
PushStatement push = (PushStatement)this.statements[this.i++];
if (pop is PopAsUnsigned)
{
return(new ConvertToUnsigned(push.ValueToPush));
}
else
{
return(push.ValueToPush);
}
}
return(base.Visit(expression));
}
public override IExpression Visit(IExpression expression)
{
Pop /*?*/ pop = expression as Pop;
if (pop != null)
{
if (this.operandStack.Count > 0)
{
var local = this.operandStack.Pop();
if (pop.Type.TypeCode == PrimitiveTypeCode.Boolean && !(local.Type is Dummy))
{
return(new NotEquality()
{
LeftOperand = new BoundExpression()
{
Definition = local
},
RightOperand = new DefaultValue()
{
DefaultValueType = local.Type
},
Type = pop.Type
});
}
if (!(pop.Type is Dummy))
{
local.Type = pop.Type;
}
this.body.numberOfReferences[local]++;
IExpression result;
if (local.turnIntoPopValueExpression)
{
result = new PopValue()
{
Type = local.Type
}
}
;
else
{
result = new BoundExpression()
{
Definition = local, Type = local.Type
}
};
if (pop is PopAsUnsigned)
{
result = new ConvertToUnsigned(result);
}
return(result);
}
else
{
// popping the unnamed exception in a catch block.
return(pop);
}
}
Dup /*?*/ dup = expression as Dup;
if (dup != null)
{
if (this.operandStack.Count > 0)
{
var local = this.operandStack.Peek();
this.body.numberOfReferences[local]++;
IExpression result;
if (local.turnIntoPopValueExpression)
{
result = new DupValue()
{
Type = local.Type
}
}
;
else
{
result = new BoundExpression()
{
Definition = local, Type = local.Type
}
};
//TODO: what about unsigned dup?
return(result);
}
return(CodeDummy.Expression);
}
return(base.Visit(expression));
}