From a74ebcd0b78b627868c912e7a77f4dde35b9ad7e Mon Sep 17 00:00:00 2001
From: Youmu Liu <105042599+Nitload-NSI@users.noreply.github.com>
Date: Thu, 23 Jul 2026 18:51:34 +0800
Subject: [PATCH] mainly theoratical work on semi, add regex sample

---
 test/SingleFile/regex.cs | 73 ++++++++++++++++++++++++++++++++++++++--
 1 file changed, 71 insertions(+), 2 deletions(-)

diff --git a/test/SingleFile/regex.cs b/test/SingleFile/regex.cs
index 25c08561..b74b5ae5 100644
--- a/test/SingleFile/regex.cs
+++ b/test/SingleFile/regex.cs
@@ -50,6 +50,75 @@ static void Match_Dot(ReadOnlySpan<char> input)
     int region_start = ptr;
     int region_end = region_start;
 
-        ptr += 1;
-        region_end = ptr;
+    ptr += 1;
+    region_end = ptr;
+}
+
+//a{3,5}
+
+static void Match_A_3_5(ReadOnlySpan<char> input)
+{
+    int ptr = 0;
+    int region_start = ptr;
+    int region_end = region_start;
+
+    do
+    {
+        if(input[ptr..].StartsWith("aaa"))
+        {
+            ptr += 3;
+            region_end = ptr;
+        }
+        else
+        {
+            break;
+        }
+        for(int i = 0; i < 2; i++)
+        {
+            if(input[ptr] == 'a')
+            {
+                ptr += 1;
+                region_end = ptr;
+            }
+            else
+            {
+                break;
+            }
+        }
+
+    } while(false);
+}
+
+//(ab){2,3}
+static void Match_AB_2_3(ReadOnlySpan<char> input)
+{
+    int ptr = 0;
+    int region_start = ptr;
+    int region_end = region_start;
+
+    do
+    {
+        if(input[ptr..].StartsWith("abab"))
+        {
+            ptr += 4;
+            region_end = ptr;
+        }
+        else
+        {
+            break;
+        }
+        for(int i = 0; i < 1; i++)
+        {
+            if(input[ptr..].StartsWith("ab"))
+            {
+                ptr += 2;
+                region_end = ptr;
+            }
+            else
+            {
+                break;
+            }
+        }
+
+    } while(false);
 }