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Optimizer is almost ok. Will go on source generate

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This commit is contained in:
Youmu Liu
2026-02-13 18:36:59 +08:00
parent 6c78373375
commit 27add7c6e8
5 changed files with 163 additions and 53 deletions
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StgSharp.RegularAnalysis/TextRegex/RegexInterpreter.cs
+22 -6
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@@ -170,23 +170,40 @@ namespace StgSharp.RegularAnalysis.TextRegex
RegexAstNode current;
// phase1: ALT flatten
// phase2: then ALT union
// phase3: CONCAT normalize
int i = 0;
List<RegexAstNode> altNodes = [];
while (enumerator.MoveNext())
{
current = enumerator.Current;
RegexAstNode cur = current.Next;
if (current.EqualityTypeConvert == RegexElementLabel.ALT)
{
List<RegexAstNode> list = FlattenAlt(current);
RegexAstNode union = MergeAlt(list);
current.ReplaceBy(union);
RegexAstNode union = FlattenAlt(current);
altNodes.Add(current);
current.Right = union;
current.Left = RegexAstNode.Empty;
} else if (current.EqualityTypeConvert == RegexElementLabel.CONCAT) {
RotateConcat(current);
}
}
List<RegexAstNode> cases = [];
// phase2: then ALT union
foreach (RegexAstNode item in altNodes)
{
RegexAstNode _case = item.Right;
do
{
cases.Add(_case);
_case = _case.Next;
} while (!RegexAstNode.IsNullOrEmpty(_case));
RegexAstNode newAlt = MergeAlt(cases);
item.ReplaceBy(newAlt);
}
// return;
// phase4: CONCAT merge
enumerator.Reset();
while (enumerator.MoveNext())
@@ -207,7 +224,6 @@ namespace StgSharp.RegularAnalysis.TextRegex
RegexAstNode op
)
{
Console.WriteLine($"Processing a {op.Source.Flag} operator");
if (op.EqualityTypeConvert == RegexElementLabel.CONCAT)
{
if (_stack.TryPopOperand(out RegexAstNode? _1) &&