// print this node result register
protected string PrintReg(RegisterNode reg)
{
if (reg == null)
{
return("_");
}
return(reg.Id);
}
/// <summary>
/// This constructor allows to postpone initialization of non-tree edge (target of unconditional jump after this
/// seqence).
/// </summary>
public SequenceNode(IReadOnlyList <Node> sequence, out Action <Node> nextNodeSetter, RegisterNode value = null)
{
Sequence = sequence;
nextNodeSetter = node =>
{
if (NextNode == null)
{
NextNode = node;
}
else
{
throw new InvalidOperationException("NextNode property is already initialized");
}
};
_register = value;
if (value == null)
{
_register = sequence.Last().ResultRegister;
}
}
// value is the value of the whole sequence
public SequenceNode(IReadOnlyList <Node> sequence, Node nextNode, RegisterNode value = null)
{
Sequence = sequence;
NextNode = nextNode;
_register = value ?? sequence.Last().ResultRegister;
}
