From ba51b2cdcaf5aafd66bd13758fa38fc893e3fad9 Mon Sep 17 00:00:00 2001
From: rdb <git@rdb.name>
Date: Thu, 28 Mar 2024 21:55:36 +0100
Subject: [PATCH] cppparser: Fix wide character literals in `#if`

---
 dtool/src/cppparser/cppPreprocessor.cxx | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/dtool/src/cppparser/cppPreprocessor.cxx b/dtool/src/cppparser/cppPreprocessor.cxx
index a56775edf0..8f3eef3f43 100644
--- a/dtool/src/cppparser/cppPreprocessor.cxx
+++ b/dtool/src/cppparser/cppPreprocessor.cxx
@@ -919,6 +919,10 @@ expand_manifests(string &expr, const Manifests &manifests, bool expand_undefined
       else if (expand_undefined && ident == "__has_include") {
         expand_has_include_function(expr, q, p);
       }
+      else if (ident == "L" && p < expr.size() && (expr[p] == '\'' || expr[p] == '\"')) {
+        // Special exception for the wide string literal suffix, which is
+        // never expanded.
+      }
       else {
         // Is it a manifest?
         Manifests::const_iterator mi = manifests.find(ident);