From ed258b734ee601413fa78d1be114365198c71394 Mon Sep 17 00:00:00 2001
From: glank <glankk@users.noreply.github.com>
Date: Wed, 1 Jul 2026 11:34:09 +0200
Subject: [PATCH 1/2] Add file load callback

---
 simplecpp.cpp | 3 +++
 simplecpp.h   | 4 ++++
 2 files changed, 7 insertions(+)

diff --git a/simplecpp.cpp b/simplecpp.cpp
index 4898800f..3e572fc0 100644
--- a/simplecpp.cpp
+++ b/simplecpp.cpp
@@ -3155,6 +3155,9 @@ std::pair<simplecpp::FileData *, bool> simplecpp::FileDataCache::tryload(FileDat
     mImpl->mIdMap.emplace(fileId, data);
     mData.emplace_back(data);
 
+    if (mLoadCallback)
+        mLoadCallback(*data);
+
     return {data, true};
 }
 
diff --git a/simplecpp.h b/simplecpp.h
index de20ae2e..659bccf9 100644
--- a/simplecpp.h
+++ b/simplecpp.h
@@ -9,6 +9,7 @@
 #include <cctype>
 #include <cstdint>
 #include <cstring>
+#include <functional>
 #include <iosfwd>
 #include <list>
 #include <map>
@@ -498,6 +499,8 @@ namespace simplecpp {
             return mData.cend();
         }
 
+        using load_callback_type = std::function<void (FileData &)>;
+
     private:
         struct Impl;
         std::unique_ptr<Impl> mImpl;
@@ -508,6 +511,7 @@ namespace simplecpp {
 
         container_type mData;
         name_map_type mNameMap;
+        load_callback_type mLoadCallback;
     };
 
     /** Converts character literal (including prefix, but not ud-suffix) to long long value.

From e3aabd15a7ae38ec9fa0829c6320f84e5aae5a52 Mon Sep 17 00:00:00 2001
From: glank <glankk@users.noreply.github.com>
Date: Wed, 1 Jul 2026 11:46:40 +0200
Subject: [PATCH 2/2] Add set_load_callback function

---
 simplecpp.h | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/simplecpp.h b/simplecpp.h
index 659bccf9..3d6fc526 100644
--- a/simplecpp.h
+++ b/simplecpp.h
@@ -501,6 +501,10 @@ namespace simplecpp {
 
         using load_callback_type = std::function<void (FileData &)>;
 
+        void set_load_callback(load_callback_type cb) {
+            mLoadCallback = std::move(cb);
+        }
+
     private:
         struct Impl;
         std::unique_ptr<Impl> mImpl;