codegen: Fix use generation for non-root module.

Author: emilio

bindgen-integration/cpp/Test.h

@@ -8,3 +8,5 @@ class Test {
   Test(int foo);
   Test(double foo);
 };
+
+typedef Test TypeAlias;

libbindgen/src/codegen/mod.rs

@@ -538,7 +538,13 @@ impl CodeGenerator for Type {
                     _ => None,
                 };
 
-                let typedef = if let Some(p) = simple_enum_path {
+                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,
+                        });
+                    }
                     typedef.use_().build(p).as_(rust_name)
                 } else {
                     let mut generics = typedef.type_(rust_name).generics();

libbindgen/tests/expectations/tests/anon_enum.rs

@@ -27,4 +27,4 @@ pub const Bar: _bindgen_ty_1 = _bindgen_ty_1::Bar;
 #[repr(u32)]
 #[derive(Debug, Copy, Clone, PartialEq, Eq, Hash)]
 pub enum _bindgen_ty_1 { Foo = 0, Bar = 1, }
-pub use _bindgen_ty_1 as Baz;
+pub use self::_bindgen_ty_1 as Baz;

libbindgen/tests/expectations/tests/bitfield_method_mangling.rs

@@ -46,4 +46,4 @@ impl _bindgen_ty_1 {
             ((val as u32 as u32) << 24u32) & (4278190080usize as u32);
     }
 }
-pub use _bindgen_ty_1 as mach_msg_type_descriptor_t;
+pub use self::_bindgen_ty_1 as mach_msg_type_descriptor_t;

libbindgen/tests/expectations/tests/inherit_typedef.rs

@@ -17,7 +17,7 @@ fn bindgen_test_layout_Foo() {
 impl Clone for Foo {
     fn clone(&self) -> Self { *self }
 }
-pub use Foo as TypedefedFoo;
+pub use self::Foo as TypedefedFoo;
 #[repr(C)]
 #[derive(Debug, Copy)]
 pub struct Bar {

libbindgen/tests/expectations/tests/union_fields.rs

@@ -44,4 +44,4 @@ fn bindgen_test_layout__bindgen_ty_1() {
 impl Clone for _bindgen_ty_1 {
     fn clone(&self) -> Self { *self }
 }
-pub use _bindgen_ty_1 as nsStyleUnion;
+pub use self::_bindgen_ty_1 as nsStyleUnion;

libbindgen/tests/expectations/tests/unknown_attr.rs

@@ -13,4 +13,4 @@ pub struct _bindgen_ty_1 {
 impl Clone for _bindgen_ty_1 {
     fn clone(&self) -> Self { *self }
 }
-pub use _bindgen_ty_1 as max_align_t;
+pub use self::_bindgen_ty_1 as max_align_t;