public QilNode GetLast()
{
if (_last == null)
{
// Create a let that will be fixed up later in ConstructLoop or by LastFixupVisitor
_last = _f.Let(_f.Double(0));
}
return(_last);
}
private QilNode MatchPatternsWhosePriorityGreater(QilIterator it, List <Pattern> patternList, QilNode matcher)
{
if (patternList.Count == 0)
{
return(matcher);
}
if (IsNoMatch(matcher))
{
return(MatchPatterns(it, patternList));
}
QilIterator stopPriority = f.Let(matcher);
QilNode result = f.Int32(NoMatch);
int lastPriority = NoMatch;
foreach (Pattern pattern in patternList)
{
// if (stopPriority > pattern.Priority) then stopPriority else
// if ($it =~ pattern.Match) then pattern.Priority else...
// First 'if' is generated lazily since it is not needed if priorities are consecutive numbers
Debug.Assert(pattern.Priority > lastPriority);
if (pattern.Priority > lastPriority + 1)
{
result = f.Conditional(f.Gt(stopPriority, f.Int32(lastPriority)), stopPriority, result);
}
result = f.Conditional(MatchPattern(it, pattern.Match), f.Int32(pattern.Priority), result);
lastPriority = pattern.Priority;
}
// If the last pattern has the highest priority, the check can be eliminated
if (lastPriority != this.priority)
{
result = f.Conditional(f.Gt(stopPriority, f.Int32(lastPriority)), stopPriority, result);
}
return(f.Loop(stopPriority, result));
}
public QilNode GetLast() => // Create a let that will be fixed up later in ConstructLoop or by LastFixupVisitor _last ??= _f.Let(_f.Double(0));