codegen: Fix typedef re-export in namespaces when bindings aren't at the root.

Author: emilio

.gitignore

@@ -1,4 +1,5 @@
 # Cargo
 target/
 *~
+./bindgen-integration/Cargo.lock
 #*#

bindgen-integration/build.rs

@@ -13,6 +13,8 @@ fn main() {
 
     let bindings = Builder::default()
         .no_unstable_rust()
+        .enable_cxx_namespaces()
+        .raw_line("pub use self::root::*;")
         .header("cpp/Test.h")
         .clang_arg("-x")
         .clang_arg("c++")

bindgen-integration/cpp/Test.h

@@ -9,4 +9,10 @@ class Test {
   Test(double foo);
 };
 
+namespace testing {
+
 typedef Test TypeAlias;
+
+} // namespace testing
+
+typedef testing::TypeAlias TypeAlias;

src/codegen/mod.rs

@@ -539,12 +539,10 @@ impl CodeGenerator for Type {
                 };
 
                 let typedef = if let Some(mut p) = simple_enum_path {
-                    if p.segments.len() == 1 {
-                        p.segments.insert(0, ast::PathSegment {
-                            identifier: ctx.ext_cx().ident_of("self"),
-                            parameters: None,
-                        });
-                    }
+                    p.segments.insert(0, ast::PathSegment {
+                        identifier: ctx.ext_cx().ident_of("self"),
+                        parameters: None,
+                    });
                     typedef.use_().build(p).as_(rust_name)
                 } else {
                     let mut generics = typedef.type_(rust_name).generics();

tests/expectations/tests/issue-410.rs

@@ -10,7 +10,7 @@ pub mod root {
     pub mod JS {
         #[allow(unused_imports)]
         use self::super::super::root;
-        pub use root::_bindgen_ty_1 as JSWhyMagic;
+        pub use self::root::_bindgen_ty_1 as JSWhyMagic;
         #[repr(C)]
         #[derive(Debug, Copy)]
         pub struct Value {

tests/expectations/tests/reparented_replacement.rs

@@ -25,5 +25,5 @@ pub mod root {
             fn clone(&self) -> Self { *self }
         }
     }
-    pub use root::foo::Bar as ReferencesBar;
+    pub use self::root::foo::Bar as ReferencesBar;
 }