From 92b023955485dc33b61cf17062dd6743d6e96c42 Mon Sep 17 00:00:00 2001
From: sonoro1234 <sonoroster@gmail.com>
Date: Wed, 25 Jun 2025 18:44:25 +0200
Subject: [PATCH] add preprocesor ifndef for including only once in
 cimgui_impl.h

---
 cimgui_impl.h           | 3 +++
 generator/generator.lua | 4 ++--
 2 files changed, 5 insertions(+), 2 deletions(-)

diff --git a/cimgui_impl.h b/cimgui_impl.h
index 27b6c2b..e9b8054 100644
--- a/cimgui_impl.h
+++ b/cimgui_impl.h
@@ -1,3 +1,5 @@
+#ifndef CIMGUI_IMPL_DEFINED
+#define CIMGUI_IMPL_DEFINED
 #ifdef CIMGUI_USE_GLFW
 #ifdef CIMGUI_DEFINE_ENUMS_AND_STRUCTS
 
@@ -196,3 +198,4 @@ CIMGUI_API int ImGui_ImplVulkanH_GetMinImageCountFromPresentMode(VkPresentModeKH
 CIMGUI_API ImGui_ImplVulkanH_Window* ImGui_ImplVulkanH_Window_ImGui_ImplVulkanH_Window(void);
 
 #endif
+#endif //CIMGUI_IMPL_DEFINED
diff --git a/generator/generator.lua b/generator/generator.lua
index bdd930d..9aa62ba 100644
--- a/generator/generator.lua
+++ b/generator/generator.lua
@@ -460,7 +460,7 @@ if #implementations > 0 then
     parser2 = cpp2ffi.Parser()
 	
 	local config = dofile(CONFIG_GENERATOR_PATH) --"./config_generator.lua"
-    local impl_str = ""
+    local impl_str = "#ifndef CIMGUI_IMPL_DEFINED\n#define CIMGUI_IMPL_DEFINED\n"
 	local impl_str_cpp = {}
     for i,impl in ipairs(implementations) do
 		print("------------implementation:",impl)
@@ -502,7 +502,7 @@ if #implementations > 0 then
 		end
 		impl_str = impl_str.. table.concat(outtab)..cfuncsstr .. "\n#endif\n"
     end
-	
+	impl_str = impl_str .. "#endif //CIMGUI_IMPL_DEFINED\n"
     parser2:do_parse()
 	save_data("./output/cimgui_impl.h",impl_str)