From 17339231ce9a8e249b4e332a52deaf2dbb14d757 Mon Sep 17 00:00:00 2001
From: Pierre Krieger <pierre.krieger1708@gmail.com>
Date: Tue, 29 Mar 2016 10:17:33 +0200
Subject: [PATCH] Don't derive traits for structs that have an unsized member

---
 vulkano-shaders/src/structs.rs | 11 +++++++++--
 1 file changed, 9 insertions(+), 2 deletions(-)

diff --git a/vulkano-shaders/src/structs.rs b/vulkano-shaders/src/structs.rs
index e31b99d98..453b71818 100644
--- a/vulkano-shaders/src/structs.rs
+++ b/vulkano-shaders/src/structs.rs
@@ -93,9 +93,16 @@ fn write_struct(doc: &parse::Spirv, struct_id: u32, members: &[u32]) -> String {
         members_defs.push(format!("pub {name}: {ty}", name = member_name, ty = ty));
     }
 
-    format!("#[repr(C)]\n#[derive(Copy, Clone, Debug, Default)]\n\
+    // We can only derive common traits if there's no unsized member in the struct.
+    let derive = if current_rust_offset.is_some() {
+        "#[derive(Copy, Clone, Debug, Default)]\n"
+    } else {
+        ""
+    };
+
+    format!("#[repr(C)]\n{derive}\
              pub struct {name} {{\n\t{members}\n}}\n",
-            name = name, members = members_defs.join(",\n\t"))
+            derive = derive, name = name, members = members_defs.join(",\n\t"))
 }
 
 /// Returns true if a `BuiltIn` decorator is applied on a struct member.