// Evaluate a list of prose objects into a new list of prose objects.
public PNode replaceWithValueAt(PNode evaluateMe, PatternMatcher match)
{
// If the phrase only serves to delete the pattern...
if (value.Length == 0)
{
// PNode firstNodeAfterPattern = evaluateMe.forwardSeek(match.NumObjectsMatched);
PNode firstNodeAfterPattern = match.terminatorNode;
if (evaluateMe.prev != null)
{
evaluateMe.prev.next = firstNodeAfterPattern;
}
firstNodeAfterPattern.prev = evaluateMe.prev;
return(firstNodeAfterPattern);
}
// Make a node to write and hook it up the previous part of the list.
PNode prevWriteHead = evaluateMe.prev;
PNode firstNodeInNewList = new PNode();
PNode writeHead = firstNodeInNewList;
prevWriteHead.next = writeHead;
foreach (ProseObject obj in value)
{
// Write a value into it
// Argrefs get special treatment.
if (obj is ArgRefObject)
{
// Look up the appropriate argument in "evaluate me" and substitute it.
int idx = ((ArgRefObject)obj).reffedArgIndex;
//ProseObject evaluated = evaluateMe.forwardSeek(index).value;
PNode subStart, subEnd;
subStart = match.getArgumentBounds(idx, out subEnd);
//TODO This needs to support @prose, @text, and @string.
//writeHead.value = evaluated;
PNode readHead = subStart;
//writeHead.initWithPNode(subStart);
while (readHead != subEnd)
{
// Hook p into the output
if (prevWriteHead != null)
{
prevWriteHead.next = writeHead;
}
writeHead.prev = prevWriteHead;
writeHead.initWithPNode(readHead);
// Update
prevWriteHead = writeHead;
readHead = readHead.next;
// Get a new node for the next cycle
writeHead = new PNode();
}
}
else
{
// Hook this node into the list
writeHead.prev = prevWriteHead;
if (prevWriteHead != null)
{
prevWriteHead.next = writeHead;
}
writeHead.value = obj;
// Grab a new node
prevWriteHead = writeHead;
writeHead = new PNode();
}
}
// When we're done, tie the end of the output list back into the input list.
// Note: prevWriteHead is actually the last PNode we wrote.
if (prevWriteHead != null)
{
prevWriteHead.next = match.terminatorNode;
//prevWriteHead.next = evaluateMe.forwardSeek(match.NumObjectsMatched);
if (match.terminatorNode != null)
{
match.terminatorNode.prev = prevWriteHead;
}
}
return(firstNodeInNewList);
}
// Evaluate a list of prose objects into a new list of prose objects.
public PNode replaceWithValueAt(PNode evaluateMe, PatternMatcher match)
{
// If the phrase only serves to delete the pattern...
if (value.Length == 0)
{
// PNode firstNodeAfterPattern = evaluateMe.forwardSeek(match.NumObjectsMatched);
PNode firstNodeAfterPattern = match.terminatorNode;
if (evaluateMe.prev != null)
evaluateMe.prev.next = firstNodeAfterPattern;
firstNodeAfterPattern.prev = evaluateMe.prev;
return firstNodeAfterPattern;
}
// Make a node to write and hook it up the previous part of the list.
PNode prevWriteHead = evaluateMe.prev;
PNode firstNodeInNewList = new PNode();
PNode writeHead = firstNodeInNewList;
prevWriteHead.next = writeHead;
foreach (ProseObject obj in value)
{
// Write a value into it
// Argrefs get special treatment.
if (obj is ArgRefObject)
{
// Look up the appropriate argument in "evaluate me" and substitute it.
int idx = ((ArgRefObject) obj).reffedArgIndex;
//ProseObject evaluated = evaluateMe.forwardSeek(index).value;
PNode subStart, subEnd;
subStart = match.getArgumentBounds(idx, out subEnd);
//TODO This needs to support @prose, @text, and @string.
//writeHead.value = evaluated;
PNode readHead = subStart;
//writeHead.initWithPNode(subStart);
while (readHead != subEnd) {
// Hook p into the output
if (prevWriteHead != null) {
prevWriteHead.next = writeHead;
}
writeHead.prev = prevWriteHead;
writeHead.initWithPNode(readHead);
// Update
prevWriteHead = writeHead;
readHead = readHead.next;
// Get a new node for the next cycle
writeHead = new PNode();
}
}
else {
// Hook this node into the list
writeHead.prev = prevWriteHead;
if (prevWriteHead != null)
prevWriteHead.next = writeHead;
writeHead.value = obj;
// Grab a new node
prevWriteHead = writeHead;
writeHead = new PNode();
}
}
// When we're done, tie the end of the output list back into the input list.
// Note: prevWriteHead is actually the last PNode we wrote.
if (prevWriteHead != null) {
prevWriteHead.next = match.terminatorNode;
//prevWriteHead.next = evaluateMe.forwardSeek(match.NumObjectsMatched);
if (match.terminatorNode != null)
match.terminatorNode.prev = prevWriteHead;
}
return firstNodeInNewList;
}
