Remove warning for opaque forward declarations

jschwe · emilio · commit efd157fb468f · 2025-02-09T15:25:04.000Z
Forward declarations never have a known layout,
and the warning makes no sense in that case.
diff --git a/bindgen/codegen/mod.rs b/bindgen/codegen/mod.rs
@@ -2315,7 +2315,9 @@ impl CodeGenerator for CompInfo {
                     });
                 }
                 None => {
-                    warn!("Opaque type without layout! Expect dragons!");
+                    if !forward_decl {
+                        warn!("Opaque type without layout! Expect dragons!");
+                    }
                 }
             }
         } else if !is_union && !zero_sized {

Original file line number	Diff line number	Diff line change
`@@ -2315,7 +2315,9 @@ impl CodeGenerator for CompInfo {`
`2315`	`2315`	`});`
`2316`	`2316`	`}`
`2317`	`2317`	`None => {`
`2318`		`- warn!("Opaque type without layout! Expect dragons!");`
	`2318`	`+ if !forward_decl {`
	`2319`	`+ warn!("Opaque type without layout! Expect dragons!");`
	`2320`	`+ }`
`2319`	`2321`	`}`
`2320`	`2322`	`}`
`2321`	`2323`	`} else if !is_union && !zero_sized {`