From ea0706a58c215e42dfa908988bb25275974fc486 Mon Sep 17 00:00:00 2001
From: Pavel Djundik <xPaw@users.noreply.github.com>
Date: Tue, 14 Nov 2023 20:48:49 +0200
Subject: [PATCH] Use generated regex

---
 .../Parser/LanguageParser.cs                  | 25 ++++++++++---------
 1 file changed, 13 insertions(+), 12 deletions(-)

diff --git a/Resources/SteamLanguageParser/Parser/LanguageParser.cs b/Resources/SteamLanguageParser/Parser/LanguageParser.cs
index 85af00cd3d..731b74117f 100644
--- a/Resources/SteamLanguageParser/Parser/LanguageParser.cs
+++ b/Resources/SteamLanguageParser/Parser/LanguageParser.cs
@@ -28,26 +28,27 @@ readonly struct TokenSourceInfo(string fileName, int startLineNumber, int startC
         public int EndColumnNumber { get; } = endColumnNumber;
     }
 
-    class LanguageParser
+    partial class LanguageParser
     {
-        public static string pattern =
-        @"(?<whitespace>\s+)|" +
-        @"(?<terminator>[;])|" +
+        [GeneratedRegex(
+            @"(?<whitespace>\s+)|" +
+            @"(?<terminator>[;])|" +
 
-        "[\"](?<string>.+?)[\"]|" +
+            "[\"](?<string>.+?)[\"]|" +
 
-        @"\/\/(?<comment>.*)$|" +
+            @"\/\/(?<comment>.*)$|" +
 
-        @"(?<identifier>-?[a-zA-Z_0-9][a-zA-Z0-9_:.]*)|" +
-        @"[#](?<preprocess>[a-zA-Z]*)|" +
+            @"(?<identifier>-?[a-zA-Z_0-9][a-zA-Z0-9_:.]*)|" +
+            @"[#](?<preprocess>[a-zA-Z]*)|" +
 
-        @"(?<operator>[{}<>\]=|])|" +
-        @"(?<invalid>[^\s]+)";
-
-        private static readonly Regex regexPattern = new(pattern, RegexOptions.Multiline | RegexOptions.Compiled);
+            @"(?<operator>[{}<>\]=|])|" +
+            @"(?<invalid>[^\s]+)",
+            RegexOptions.Multiline)]
+        private static partial Regex RegexPattern();
 
         public static Queue<Token> TokenizeString(string buffer, string fileName = "")
         {
+            var regexPattern = RegexPattern();
             var bufferLines = buffer.Split(new[] { Environment.NewLine }, StringSplitOptions.None);
 
             MatchCollection matches = regexPattern.Matches(buffer);