From f0a1de6dbc103be9a8a2723b02b0b0545b010453 Mon Sep 17 00:00:00 2001
From: Casper Zandbergen <info@casperzandbergen.nl>
Date: Sat, 2 May 2026 10:59:47 +0200
Subject: [PATCH] Fixed crash on Linux

void CFCharacterSetRemoveCharactersInRange(CFMutableCharacterSetRef, CFRange): Immutable character set passed to mutable function
---
 Sources/Splash/Grammar/SwiftGrammar.swift | 9 ++-------
 1 file changed, 2 insertions(+), 7 deletions(-)

diff --git a/Sources/Splash/Grammar/SwiftGrammar.swift b/Sources/Splash/Grammar/SwiftGrammar.swift
index 79a98d5..3ffd142 100644
--- a/Sources/Splash/Grammar/SwiftGrammar.swift
+++ b/Sources/Splash/Grammar/SwiftGrammar.swift
@@ -13,13 +13,8 @@ public struct SwiftGrammar: Grammar {
     public var syntaxRules: [SyntaxRule]
 
     public init() {
-        var delimiters = CharacterSet.alphanumerics.inverted
-        delimiters.remove("_")
-        delimiters.remove("\"")
-        delimiters.remove("#")
-        delimiters.remove("@")
-        delimiters.remove("$")
-        self.delimiters = delimiters
+        let notDelimiters = CharacterSet(charactersIn: "_\"#@$")
+        self.delimiters = CharacterSet.alphanumerics.union(notDelimiters).inverted
 
         syntaxRules = [
             PreprocessingRule(),