Bindgen ignores enum definition when declaration appears first

[upsuper]

Input C/C++ Header

enum class CSSPseudoClassType : int;

enum class CSSPseudoClassType : int
{
  empty,
  link,
};

Bindgen Invokation

$ bindgen input.h -- -std=c++14

Actual Results

#[derive(Debug, Copy, Clone, PartialEq, Eq, Hash)]
pub enum CSSPseudoClassType { }

Expected Results

#[repr(i32)]
#[derive(Debug, Copy, Clone, PartialEq, Eq, Hash)]
pub enum CSSPseudoClassType { empty = 0, link = 1, }

RUST_LOG=bindgen Output

INFO:bindgen: Clang Version: clang version 3.9.0 (tags/RELEASE_390/final)
DEBUG:bindgen::ir::context: BindgenContext::add_item(Item { id: ItemId(0), local_id: Cell { value: None }, next_child_local_id: Cell { value: 1 }, canonical_name_cache: RefCell { value: None }, comment: None, annotations: Annotations { opaque: false, hide: false, use_instead_of: None, disallow_copy: false, private_fields: None, accessor_kind: None, constify_enum_variant: false }, parent_id: ItemId(0), kind: Module(Module { name: Some("root"), kind: Normal, children_ids: [] }), detect_derive_debug_cycle: Cell { value: false }, detect_derive_copy_cycle: Cell { value: false } }, declaration: None, loc: None
DEBUG:bindgen::ir::item: Item::from_ty_with_id: ItemId(1)
	ty = Type(CSSPseudoClassType, kind: Enum, cconv: 100, decl: Cursor(CSSPseudoClassType kind: EnumDecl, loc: test.hpp:3:12, usr: Some("c:@E@CSSPseudoClassType")), canon: Cursor(CSSPseudoClassType kind: EnumDecl, loc: test.hpp:1:12, usr: Some("c:@E@CSSPseudoClassType"))),
	location = Cursor(CSSPseudoClassType kind: EnumDecl, loc: test.hpp:3:12, usr: Some("c:@E@CSSPseudoClassType"))
DEBUG:bindgen::ir::context: builtin_or_resolved_ty: Type(CSSPseudoClassType, kind: Enum, cconv: 100, decl: Cursor(CSSPseudoClassType kind: EnumDecl, loc: test.hpp:3:12, usr: Some("c:@E@CSSPseudoClassType")), canon: Cursor(CSSPseudoClassType kind: EnumDecl, loc: test.hpp:1:12, usr: Some("c:@E@CSSPseudoClassType"))), Some(Cursor(CSSPseudoClassType kind: EnumDecl, loc: test.hpp:3:12, usr: Some("c:@E@CSSPseudoClassType"))), None
DEBUG:bindgen::ir::context: Not resolved, maybe builtin?
DEBUG:bindgen::ir::context: builtin_or_resolved_ty: Type(CSSPseudoClassType, kind: Enum, cconv: 100, decl: Cursor(CSSPseudoClassType kind: EnumDecl, loc: test.hpp:3:12, usr: Some("c:@E@CSSPseudoClassType")), canon: Cursor(CSSPseudoClassType kind: EnumDecl, loc: test.hpp:1:12, usr: Some("c:@E@CSSPseudoClassType"))), Some(Cursor(CSSPseudoClassType kind: EnumDecl, loc: test.hpp:3:12, usr: Some("c:@E@CSSPseudoClassType"))), None
DEBUG:bindgen::ir::context: Not resolved, maybe builtin?
DEBUG:bindgen::ir::ty: from_clang_ty: ItemId(1), ty: Type(CSSPseudoClassType, kind: Enum, cconv: 100, decl: Cursor(CSSPseudoClassType kind: EnumDecl, loc: test.hpp:3:12, usr: Some("c:@E@CSSPseudoClassType")), canon: Cursor(CSSPseudoClassType kind: EnumDecl, loc: test.hpp:1:12, usr: Some("c:@E@CSSPseudoClassType"))), loc: Cursor(CSSPseudoClassType kind: EnumDecl, loc: test.hpp:3:12, usr: Some("c:@E@CSSPseudoClassType"))
DEBUG:bindgen::ir::ty: currently_parsed_types: [PartialType { decl: Cursor(CSSPseudoClassType kind: EnumDecl, loc: test.hpp:1:12, usr: Some("c:@E@CSSPseudoClassType")), id: ItemId(1) }]
DEBUG:bindgen::ir::item: Item::from_ty_with_id: ItemId(2)
	ty = Type(int, kind: Int, cconv: 100, decl: Cursor( kind: NoDeclFound, loc: builtin definitions, usr: None), canon: Cursor( kind: NoDeclFound, loc: builtin definitions, usr: None)),
	location = Cursor(CSSPseudoClassType kind: EnumDecl, loc: test.hpp:1:12, usr: Some("c:@E@CSSPseudoClassType"))
DEBUG:bindgen::ir::context: builtin_or_resolved_ty: Type(int, kind: Int, cconv: 100, decl: Cursor( kind: NoDeclFound, loc: builtin definitions, usr: None), canon: Cursor( kind: NoDeclFound, loc: builtin definitions, usr: None)), Some(Cursor(CSSPseudoClassType kind: EnumDecl, loc: test.hpp:1:12, usr: Some("c:@E@CSSPseudoClassType"))), None
DEBUG:bindgen::ir::context: Not resolved, maybe builtin?
DEBUG:bindgen::ir::context: add_builtin_item: item = Item { id: ItemId(3), local_id: Cell { value: None }, next_child_local_id: Cell { value: 1 }, canonical_name_cache: RefCell { value: None }, comment: None, annotations: Annotations { opaque: false, hide: false, use_instead_of: None, disallow_copy: false, private_fields: None, accessor_kind: None, constify_enum_variant: false }, parent_id: ItemId(0), kind: Type(Type { name: Some("int"), layout: Some(Layout { size: 4, align: 4, packed: false }), kind: Int(Int), is_const: false, detect_has_vtable_cycle: Cell { value: false } }), detect_derive_debug_cycle: Cell { value: false }, detect_derive_copy_cycle: Cell { value: false } }
DEBUG:bindgen::ir::context: BindgenContext::add_item(Item { id: ItemId(1), local_id: Cell { value: None }, next_child_local_id: Cell { value: 1 }, canonical_name_cache: RefCell { value: None }, comment: None, annotations: Annotations { opaque: false, hide: false, use_instead_of: None, disallow_copy: false, private_fields: None, accessor_kind: None, constify_enum_variant: false }, parent_id: ItemId(0), kind: Type(Type { name: Some("CSSPseudoClassType"), layout: Some(Layout { size: 4, align: 4, packed: false }), kind: Enum(Enum { repr: Some(ItemId(3)), variants: [] }), is_const: false, detect_has_vtable_cycle: Cell { value: false } }), detect_derive_debug_cycle: Cell { value: false }, detect_derive_copy_cycle: Cell { value: false } }, declaration: Some(Cursor(CSSPseudoClassType kind: EnumDecl, loc: test.hpp:1:12, usr: Some("c:@E@CSSPseudoClassType"))), loc: Some(Cursor(CSSPseudoClassType kind: EnumDecl, loc: test.hpp:3:12, usr: Some("c:@E@CSSPseudoClassType")))
DEBUG:bindgen::ir::item: Item::from_ty_with_id: ItemId(4)
	ty = Type(CSSPseudoClassType, kind: Enum, cconv: 100, decl: Cursor(CSSPseudoClassType kind: EnumDecl, loc: test.hpp:3:12, usr: Some("c:@E@CSSPseudoClassType")), canon: Cursor(CSSPseudoClassType kind: EnumDecl, loc: test.hpp:1:12, usr: Some("c:@E@CSSPseudoClassType"))),
	location = Cursor(CSSPseudoClassType kind: EnumDecl, loc: test.hpp:3:12, usr: Some("c:@E@CSSPseudoClassType"))
DEBUG:bindgen::ir::context: builtin_or_resolved_ty: Type(CSSPseudoClassType, kind: Enum, cconv: 100, decl: Cursor(CSSPseudoClassType kind: EnumDecl, loc: test.hpp:3:12, usr: Some("c:@E@CSSPseudoClassType")), canon: Cursor(CSSPseudoClassType kind: EnumDecl, loc: test.hpp:1:12, usr: Some("c:@E@CSSPseudoClassType"))), Some(Cursor(CSSPseudoClassType kind: EnumDecl, loc: test.hpp:3:12, usr: Some("c:@E@CSSPseudoClassType"))), None
DEBUG:bindgen::ir::context: Already resolved ty ItemId(1), CanonicalTypeDeclaration(Type(CSSPseudoClassType, kind: Enum, cconv: 100, decl: Cursor(CSSPseudoClassType kind: EnumDecl, loc: test.hpp:3:12, usr: Some("c:@E@CSSPseudoClassType")), canon: Cursor(CSSPseudoClassType kind: EnumDecl, loc: test.hpp:1:12, usr: Some("c:@E@CSSPseudoClassType"))), Cursor(CSSPseudoClassType kind: EnumDecl, loc: test.hpp:1:12, usr: Some("c:@E@CSSPseudoClassType"))), Type(CSSPseudoClassType, kind: Enum, cconv: 100, decl: Cursor(CSSPseudoClassType kind: EnumDecl, loc: test.hpp:3:12, usr: Some("c:@E@CSSPseudoClassType")), canon: Cursor(CSSPseudoClassType kind: EnumDecl, loc: test.hpp:1:12, usr: Some("c:@E@CSSPseudoClassType"))) Some(Cursor(CSSPseudoClassType kind: EnumDecl, loc: test.hpp:3:12, usr: Some("c:@E@CSSPseudoClassType")))
DEBUG:bindgen::ir::context: add_builtin_item: item = Item { id: ItemId(4), local_id: Cell { value: None }, next_child_local_id: Cell { value: 1 }, canonical_name_cache: RefCell { value: None }, comment: None, annotations: Annotations { opaque: false, hide: false, use_instead_of: None, disallow_copy: false, private_fields: None, accessor_kind: None, constify_enum_variant: false }, parent_id: ItemId(0), kind: Type(Type { name: Some("CSSPseudoClassType"), layout: Some(Layout { size: 4, align: 4, packed: false }), kind: ResolvedTypeRef(ItemId(1)), is_const: false, detect_has_vtable_cycle: Cell { value: false } }), detect_derive_debug_cycle: Cell { value: false }, detect_derive_copy_cycle: Cell { value: false } }
DEBUG:bindgen::ir::context: No replacements to process
DEBUG:bindgen::codegen: codegen: BindgenOptions { hidden_types: RegexSet { items: [], set: Some(RegexSet([])) }, opaque_types: RegexSet { items: [], set: Some(RegexSet([])) }, whitelisted_types: RegexSet { items: [], set: Some(RegexSet([])) }, whitelisted_functions: RegexSet { items: [], set: Some(RegexSet([])) }, whitelisted_vars: RegexSet { items: [], set: Some(RegexSet([])) }, bitfield_enums: RegexSet { items: [], set: Some(RegexSet([])) }, constified_enums: RegexSet { items: [], set: Some(RegexSet([])) }, builtins: false, links: [], emit_ast: false, emit_ir: false, emit_ir_graphviz: None, enable_cxx_namespaces: false, disable_name_namespacing: false, derive_debug: true, derive_default: false, unstable_rust: true, use_core: false, ctypes_prefix: None, namespaced_constants: true, msvc_mangling: false, convert_floats: true, raw_lines: [], clang_args: ["-std=c++14", "-isystem", "/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/../include/c++/v1", "-isystem", "/usr/local/include", "-isystem", "/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/../lib/clang/8.0.0/include", "-isystem", "/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/include", "-isystem", "/usr/include", "-isystem", "/System/Library/Frameworks", "-isystem", "/Library/Frameworks", "test.hpp"], input_header: Some("test.hpp"), dummy_uses: None, parse_callbacks: None, codegen_config: CodegenConfig { functions: true, types: true, vars: true, methods: true, constructors: true }, conservative_inline_namespaces: false, generate_comments: true, generate_inline_functions: false, whitelist_recursively: true, objc_extern_crate: false, enable_mangling: true, prepend_enum_name: true }
DEBUG:bindgen::codegen: <Item as CodeGenerator>::codegen: self = Item { id: ItemId(0), local_id: Cell { value: None }, next_child_local_id: Cell { value: 1 }, canonical_name_cache: RefCell { value: None }, comment: None, annotations: Annotations { opaque: false, hide: false, use_instead_of: None, disallow_copy: false, private_fields: None, accessor_kind: None, constify_enum_variant: false }, parent_id: ItemId(0), kind: Module(Module { name: Some("root"), kind: Normal, children_ids: [ItemId(1)] }), detect_derive_debug_cycle: Cell { value: false }, detect_derive_copy_cycle: Cell { value: false } }
DEBUG:bindgen::codegen: <Module as CodeGenerator>::codegen: item = Item { id: ItemId(0), local_id: Cell { value: None }, next_child_local_id: Cell { value: 1 }, canonical_name_cache: RefCell { value: None }, comment: None, annotations: Annotations { opaque: false, hide: false, use_instead_of: None, disallow_copy: false, private_fields: None, accessor_kind: None, constify_enum_variant: false }, parent_id: ItemId(0), kind: Module(Module { name: Some("root"), kind: Normal, children_ids: [ItemId(1)] }), detect_derive_debug_cycle: Cell { value: false }, detect_derive_copy_cycle: Cell { value: false } }
DEBUG:bindgen::codegen: <Item as CodeGenerator>::codegen: self = Item { id: ItemId(1), local_id: Cell { value: None }, next_child_local_id: Cell { value: 1 }, canonical_name_cache: RefCell { value: None }, comment: None, annotations: Annotations { opaque: false, hide: false, use_instead_of: None, disallow_copy: false, private_fields: None, accessor_kind: None, constify_enum_variant: false }, parent_id: ItemId(0), kind: Type(Type { name: Some("CSSPseudoClassType"), layout: Some(Layout { size: 4, align: 4, packed: false }), kind: Enum(Enum { repr: Some(ItemId(3)), variants: [] }), is_const: false, detect_has_vtable_cycle: Cell { value: false } }), detect_derive_debug_cycle: Cell { value: false }, detect_derive_copy_cycle: Cell { value: false } }
DEBUG:bindgen::codegen: <Type as CodeGenerator>::codegen: item = Item { id: ItemId(1), local_id: Cell { value: None }, next_child_local_id: Cell { value: 1 }, canonical_name_cache: RefCell { value: None }, comment: None, annotations: Annotations { opaque: false, hide: false, use_instead_of: None, disallow_copy: false, private_fields: None, accessor_kind: None, constify_enum_variant: false }, parent_id: ItemId(0), kind: Type(Type { name: Some("CSSPseudoClassType"), layout: Some(Layout { size: 4, align: 4, packed: false }), kind: Enum(Enum { repr: Some(ItemId(3)), variants: [] }), is_const: false, detect_has_vtable_cycle: Cell { value: false } }), detect_derive_debug_cycle: Cell { value: false }, detect_derive_copy_cycle: Cell { value: false } }
DEBUG:bindgen::codegen: <Enum as CodeGenerator>::codegen: item = Item { id: ItemId(1), local_id: Cell { value: None }, next_child_local_id: Cell { value: 1 }, canonical_name_cache: RefCell { value: None }, comment: None, annotations: Annotations { opaque: false, hide: false, use_instead_of: None, disallow_copy: false, private_fields: None, accessor_kind: None, constify_enum_variant: false }, parent_id: ItemId(0), kind: Type(Type { name: Some("CSSPseudoClassType"), layout: Some(Layout { size: 4, align: 4, packed: false }), kind: Enum(Enum { repr: Some(ItemId(3)), variants: [] }), is_const: false, detect_has_vtable_cycle: Cell { value: false } }), detect_derive_debug_cycle: Cell { value: false }, detect_derive_copy_cycle: Cell { value: false } }

[emilio]

Fix over #600