From 5548b66b15742c872575b62884821352cfc7ba1a Mon Sep 17 00:00:00 2001
From: Eugen Wissner <belka@caraus.de>
Date: Thu, 23 Jan 2025 14:14:43 +0100
Subject: [PATCH] Recognize hexadecimal sequences in the characters

---
 source/lexer.ll | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/source/lexer.ll b/source/lexer.ll
index 64c763a..2711b39 100644
--- a/source/lexer.ll
+++ b/source/lexer.ll
@@ -122,6 +122,11 @@ return                  {
                                 return yy::parser::make_CHARACTER(std::string(yytext, 1, 1), this->location);
                             }
                         }
+'\\x[0-9a-fA-F]{2}'     {
+                            char character = static_cast<char>(std::stoi(yytext + 3, nullptr, 16));
+
+                            return yy::parser::make_CHARACTER(std::string(&character, 1), this->location);
+                        }
 '\\[0nabtfrv\\'"?]'     {
                             switch (yytext[2])
                             {