add a scanner, but this seems to be a wrong solution. Change open-source head

2026-07-07 18:20:38 +08:00
parent b053567eb7
commit 1705d7c245
276 changed files with 3468 additions and 7205 deletions
@@ -0,0 +1,64 @@
+// -----------------------------------------------------------------------------
+// file="RegexAnalyzer.SourceGen"
+// Project: StgSharp
+// Copyright (c) Nitload.
+// SPDX-License-Identifier: MIT
+// -----------------------------------------------------------------------------
+
+using Microsoft.CodeAnalysis;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Runtime.CompilerServices;
+using System.Runtime.InteropServices;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace StgSharp.RegularAnalysis.Text
+{
+    public partial class RegexAnalyzer
+    {
+
+        internal static StringBuilder GenerateSource(
+                                      List<RegexIR> ir
+        )
+        {
+            StringBuilder sb = new();
+            List<StringBuilder> sub_match_list = [];
+
+            ReadOnlySpan<RegexIR> source = CollectionsMarshal.AsSpan(ir);
+            RegexIR[] window = new RegexIR[8];
+            Span<RegexIR> scan_win = window;
+
+            _ = sb.AppendLine(@"public abstract MatchResult Match(ReadOnlySpan<char> text)")//
+                  .AppendLine(@"{");
+
+            int index = 0;
+            do
+            {
+                int count = int.Min(8, source.Length - index);
+                source.Slice(index, count).CopyTo(scan_win);
+            } while (index < ir.Count);
+
+            foreach (StringBuilder _sub in sub_match_list)
+            {
+                _ = sb.AppendLine()                     //
+                      .Append(_sub);
+            }
+
+            return sb;
+            /*
+            int TryGenerateMatch(
+                Span<RegexIR> scan_win,
+                StringBuilder sb
+            )
+            {
+                if (scan_win[0] is RegexMatchSeqIR seq) {
+                    _ = sb.AppendLine(string.Empty);
+                }
+            }
+            /**/
+        }
+
+    }
+}