No constructor generated when specifying `--generate types,methods,functions,vars`

Question

No constructor generated when specifying `--generate types,methods,functions,vars`

gsingh93 opened this issue 9 years ago · 6 comments

Input C/C++ Header

class Foo {
public:
    Foo(int a);
};

Bindgen Invokation

bindgen test.h --generate types,methods,functions,vars -- -x c++

Actual Results

/* automatically generated by rust-bindgen */

#[repr(C)]
#[derive(Debug, Copy)]
pub struct Foo {
    pub _address: u8,
}
#[test]
fn bindgen_test_layout_Foo() {
    assert_eq!(::std::mem::size_of::<Foo>() , 1usize , concat ! (
               "Size of: " , stringify ! ( Foo ) ));
    assert_eq! (::std::mem::align_of::<Foo>() , 1usize , concat ! (
                "Alignment of " , stringify ! ( Foo ) ));
}
impl Clone for Foo {
    fn clone(&self) -> Self { *self }
}

Expected Results

I should get the output from bindgen test.h -- -x c++, which includes the constructor:

/* automatically generated by rust-bindgen */

#[repr(C)]
#[derive(Debug, Copy)]
pub struct Foo {
    pub _address: u8,
}
#[test]
fn bindgen_test_layout_Foo() {
    assert_eq!(::std::mem::size_of::<Foo>() , 1usize , concat ! (
               "Size of: " , stringify ! ( Foo ) ));
    assert_eq! (::std::mem::align_of::<Foo>() , 1usize , concat ! (
                "Alignment of " , stringify ! ( Foo ) ));
}
extern "C" {
    #[link_name = "_ZN3FooC1Ei"]
    pub fn Foo_Foo(this: *mut Foo, a: ::std::os::raw::c_int);
}
impl Clone for Foo {
    fn clone(&self) -> Self { *self }
}
impl Foo {
    #[inline]
    pub unsafe fn new(a: ::std::os::raw::c_int) -> Self {
        let mut __bindgen_tmp = ::std::mem::uninitialized();
        Foo_Foo(&mut __bindgen_tmp, a);
        __bindgen_tmp
    }
}

`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: [] }) }, declaration: None, loc: None
DEBUG:bindgen::ir::context: builtin_or_resolved_ty: Type(Foo, kind: Record, decl: Cursor(Foo kind: ClassDecl, loc: test.h:1:7, usr: Some("c:@S@Foo")), canon: Cursor(Foo kind: ClassDecl, loc: test.h:1:7, usr: Some("c:@S@Foo"))), Some(Cursor(Foo kind: ClassDecl, loc: test.h:1:7, usr: Some("c:@S@Foo"))), None
DEBUG:bindgen::ir::context: Not resolved, maybe builtin?
DEBUG:bindgen::ir::context: builtin_or_resolved_ty: Type(Foo, kind: Record, decl: Cursor(Foo kind: ClassDecl, loc: test.h:1:7, usr: Some("c:@S@Foo")), canon: Cursor(Foo kind: ClassDecl, loc: test.h:1:7, usr: Some("c:@S@Foo"))), Some(Cursor(Foo kind: ClassDecl, loc: test.h:1:7, usr: Some("c:@S@Foo"))), None
DEBUG:bindgen::ir::context: Not resolved, maybe builtin?
DEBUG:bindgen::ir::ty: from_clang_ty: ItemId(1), ty: Type(Foo, kind: Record, decl: Cursor(Foo kind: ClassDecl, loc: test.h:1:7, usr: Some("c:@S@Foo")), canon: Cursor(Foo kind: ClassDecl, loc: test.h:1:7, usr: Some("c:@S@Foo"))), loc: Some(Cursor(Foo kind: ClassDecl, loc: test.h:1:7, usr: Some("c:@S@Foo")))
DEBUG:bindgen::ir::ty: currently_parsed_types: [PartialType { decl: Cursor(Foo kind: ClassDecl, loc: test.h:1:7, usr: Some("c:@S@Foo")), id: ItemId(1) }]
DEBUG:bindgen::ir::comp: CompInfo::from_ty(Struct, Cursor(Foo kind: ClassDecl, loc: test.h:1:7, usr: Some("c:@S@Foo")))
DEBUG:bindgen::ir::function: Function::parse(Cursor(Foo kind: CXXConstructor, loc: test.h:3:5, usr: Some("c:@S@Foo@F@Foo#I#")), Type(void (int), kind: FunctionProto, decl: Cursor( kind: NoDeclFound, loc: builtin definitions, usr: None), canon: Cursor( kind: NoDeclFound, loc: builtin definitions, usr: None)))
DEBUG:bindgen::ir::context: builtin_or_resolved_ty: Type(void (int), kind: FunctionProto, decl: Cursor( kind: NoDeclFound, loc: builtin definitions, usr: None), canon: Cursor( kind: NoDeclFound, loc: builtin definitions, usr: None)), Some(Cursor(Foo kind: CXXConstructor, loc: test.h:3:5, usr: Some("c:@S@Foo@F@Foo#I#"))), None
DEBUG:bindgen::ir::context: Not resolved, maybe builtin?
DEBUG:bindgen::ir::context: builtin_or_resolved_ty: Type(void (int), kind: FunctionProto, decl: Cursor( kind: NoDeclFound, loc: builtin definitions, usr: None), canon: Cursor( kind: NoDeclFound, loc: builtin definitions, usr: None)), Some(Cursor(Foo kind: CXXConstructor, loc: test.h:3:5, usr: Some("c:@S@Foo@F@Foo#I#"))), None
DEBUG:bindgen::ir::context: Not resolved, maybe builtin?
DEBUG:bindgen::ir::ty: from_clang_ty: ItemId(2), ty: Type(void (int), kind: FunctionProto, decl: Cursor( kind: NoDeclFound, loc: builtin definitions, usr: None), canon: Cursor( kind: NoDeclFound, loc: builtin definitions, usr: None)), loc: Some(Cursor(Foo kind: CXXConstructor, loc: test.h:3:5, usr: Some("c:@S@Foo@F@Foo#I#")))
DEBUG:bindgen::ir::ty: currently_parsed_types: [PartialType { decl: Cursor(Foo kind: ClassDecl, loc: test.h:1:7, usr: Some("c:@S@Foo")), id: ItemId(1) }]
DEBUG:bindgen::ir::function: FunctionSig::from_ty Type(void (int), kind: FunctionProto, decl: Cursor( kind: NoDeclFound, loc: builtin definitions, usr: None), canon: Cursor( kind: NoDeclFound, loc: builtin definitions, usr: None)) Cursor(Foo kind: CXXConstructor, loc: test.h:3:5, usr: Some("c:@S@Foo@F@Foo#I#"))
DEBUG:bindgen::ir::item: from_ty_or_ref_with_id: ItemId(3) Type(int, kind: Int, decl: Cursor( kind: NoDeclFound, loc: builtin definitions, usr: None), canon: Cursor( kind: NoDeclFound, loc: builtin definitions, usr: None)), Some(Cursor(a kind: ParmDecl, loc: test.h:3:13, usr: Some("c:test.h@28@S@Foo@F@Foo#I#@a"))), None
DEBUG:bindgen::ir::context: builtin_or_resolved_ty: Type(int, kind: Int, decl: Cursor( kind: NoDeclFound, loc: builtin definitions, usr: None), canon: Cursor( kind: NoDeclFound, loc: builtin definitions, usr: None)), Some(Cursor(a kind: ParmDecl, loc: test.h:3:13, usr: Some("c:test.h@28@S@Foo@F@Foo#I#@a"))), None
DEBUG:bindgen::ir::context: Not resolved, maybe builtin?
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("int"), layout: Some(Layout { size: 4, align: 4, packed: false }), kind: Int(Int), is_const: false }) }
DEBUG:bindgen::ir::item: ItemId(4) already resolved: Some(Cursor(a kind: ParmDecl, loc: test.h:3:13, usr: Some("c:test.h@28@S@Foo@F@Foo#I#@a")))
DEBUG:bindgen::ir::context: builtin_or_resolved_ty: Type(Foo, kind: Record, decl: Cursor(Foo kind: ClassDecl, loc: test.h:1:7, usr: Some("c:@S@Foo")), canon: Cursor(Foo kind: ClassDecl, loc: test.h:1:7, usr: Some("c:@S@Foo"))), Some(Cursor(Foo kind: ClassDecl, loc: test.h:1:7, usr: Some("c:@S@Foo"))), None
DEBUG:bindgen::ir::context: Not resolved, maybe builtin?
DEBUG:bindgen::ir::item: Avoiding recursion parsing type: Type(Foo, kind: Record, decl: Cursor(Foo kind: ClassDecl, loc: test.h:1:7, usr: Some("c:@S@Foo")), canon: Cursor(Foo kind: ClassDecl, loc: test.h:1:7, usr: Some("c:@S@Foo")))
DEBUG:bindgen::ir::context: BindgenContext::add_item(Item { id: ItemId(6), 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: None, layout: None, kind: Pointer(ItemId(1)), is_const: false }) }, declaration: None, loc: None
DEBUG:bindgen::ir::item: from_ty_or_ref_with_id: ItemId(7) Type(void, kind: Void, decl: Cursor( kind: NoDeclFound, loc: builtin definitions, usr: None), canon: Cursor( kind: NoDeclFound, loc: builtin definitions, usr: None)), None, None
DEBUG:bindgen::ir::context: builtin_or_resolved_ty: Type(void, kind: Void, decl: Cursor( kind: NoDeclFound, loc: builtin definitions, usr: None), canon: Cursor( kind: NoDeclFound, loc: builtin definitions, usr: None)), None, None
DEBUG:bindgen::ir::context: Not resolved, maybe builtin?
DEBUG:bindgen::ir::context: add_builtin_item: item = Item { id: ItemId(8), 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("void"), layout: None, kind: Void, is_const: false }) }
DEBUG:bindgen::ir::item: ItemId(8) already resolved: None
DEBUG:bindgen::ir::context: BindgenContext::add_item(Item { id: ItemId(2), 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: None, layout: Some(Layout { size: 1, align: 4, packed: false }), kind: Function(FunctionSig { return_type: ItemId(8), argument_types: [(Some("this"), ItemId(6)), (Some("a"), ItemId(4))], is_variadic: false, abi: Some(C) }), is_const: false }) }, declaration: Some(Cursor( kind: NoDeclFound, loc: builtin definitions, usr: None)), loc: Some(Cursor(Foo kind: CXXConstructor, loc: test.h:3:5, usr: Some("c:@S@Foo@F@Foo#I#")))
DEBUG:bindgen::ir::context: Invalid declaration Cursor( kind: NoDeclFound, loc: builtin definitions, usr: None) found for type Type { name: None, layout: Some(Layout { size: 1, align: 4, packed: false }), kind: Function(FunctionSig { return_type: ItemId(8), argument_types: [(Some("this"), ItemId(6)), (Some("a"), ItemId(4))], is_variadic: false, abi: Some(C) }), is_const: false }
DEBUG:bindgen::ir::context: BindgenContext::add_item(Item { id: ItemId(9), 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(1), kind: Function(Function { name: "Foo", mangled_name: Some("_ZN3FooC1Ei"), signature: ItemId(2), comment: None }) }, declaration: Some(Cursor(Foo kind: CXXConstructor, loc: test.h:3:5, usr: Some("c:@S@Foo@F@Foo#I#"))), loc: Some(Cursor(Foo kind: CXXConstructor, loc: test.h:3:5, usr: Some("c:@S@Foo@F@Foo#I#")))
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("Foo"), layout: Some(Layout { size: 1, align: 1, packed: false }), kind: Comp(CompInfo { kind: Struct, fields: [], template_args: [], methods: [], constructors: [ItemId(9)], base_members: [], ref_template: None, inner_types: [], inner_vars: [], has_vtable: false, has_destructor: false, has_nonempty_base: false, has_non_type_template_params: false, packed: false, found_unknown_attr: false, detect_derive_debug_cycle: Cell { value: false }, detect_derive_default_cycle: Cell { value: false }, detect_has_destructor_cycle: Cell { value: false }, is_forward_declaration: false }), is_const: false }) }, declaration: Some(Cursor(Foo kind: ClassDecl, loc: test.h:1:7, usr: Some("c:@S@Foo"))), loc: Some(Cursor(Foo kind: ClassDecl, loc: test.h:1:7, usr: Some("c:@S@Foo")))
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: ["-x", "c++", "-isystem", "/Applications/Xcode_8.2.1.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/../include/c++/v1", "-isystem", "/usr/local/include", "-isystem", "/Applications/Xcode_8.2.1.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/../lib/clang/8.0.0/include", "-isystem", "/Applications/Xcode_8.2.1.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/include", "-isystem", "/usr/include", "-isystem", "/System/Library/Frameworks", "-isystem", "/Library/Frameworks", "test.h"], input_header: Some("test.h"), dummy_uses: None, type_chooser: None, codegen_config: CodegenConfig { functions: true, types: true, vars: true, methods: true, constructors: false }, conservative_inline_namespaces: false, generate_comments: true, whitelist_recursively: true, objc_extern_crate: false }
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(6), ItemId(2), ItemId(1)] }) }
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(6), ItemId(2), ItemId(1)] }) }
DEBUG:bindgen::codegen: <Item as CodeGenerator>::codegen: self = Item { id: ItemId(6), 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: None, layout: None, kind: Pointer(ItemId(1)), is_const: false }) }
DEBUG:bindgen::codegen: <Type as CodeGenerator>::codegen: item = Item { id: ItemId(6), 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: None, layout: None, kind: Pointer(ItemId(1)), is_const: false }) }
DEBUG:bindgen::codegen: <Item as CodeGenerator>::codegen: self = Item { id: ItemId(2), 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: None, layout: Some(Layout { size: 1, align: 4, packed: false }), kind: Function(FunctionSig { return_type: ItemId(8), argument_types: [(Some("this"), ItemId(6)), (Some("a"), ItemId(4))], is_variadic: false, abi: Some(C) }), is_const: false }) }
DEBUG:bindgen::codegen: <Type as CodeGenerator>::codegen: item = Item { id: ItemId(2), 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: None, layout: Some(Layout { size: 1, align: 4, packed: false }), kind: Function(FunctionSig { return_type: ItemId(8), argument_types: [(Some("this"), ItemId(6)), (Some("a"), ItemId(4))], is_variadic: false, abi: Some(C) }), is_const: 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("Foo"), layout: Some(Layout { size: 1, align: 1, packed: false }), kind: Comp(CompInfo { kind: Struct, fields: [], template_args: [], methods: [], constructors: [ItemId(9)], base_members: [], ref_template: None, inner_types: [], inner_vars: [], has_vtable: false, has_destructor: false, has_nonempty_base: false, has_non_type_template_params: false, packed: false, found_unknown_attr: false, detect_derive_debug_cycle: Cell { value: false }, detect_derive_default_cycle: Cell { value: false }, detect_has_destructor_cycle: Cell { value: false }, is_forward_declaration: false }), is_const: 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("Foo"), layout: Some(Layout { size: 1, align: 1, packed: false }), kind: Comp(CompInfo { kind: Struct, fields: [], template_args: [], methods: [], constructors: [ItemId(9)], base_members: [], ref_template: None, inner_types: [], inner_vars: [], has_vtable: false, has_destructor: false, has_nonempty_base: false, has_non_type_template_params: false, packed: false, found_unknown_attr: false, detect_derive_debug_cycle: Cell { value: false }, detect_derive_default_cycle: Cell { value: false }, detect_has_destructor_cycle: Cell { value: false }, is_forward_declaration: false }), is_const: false }) }
DEBUG:bindgen::codegen: <CompInfo 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("Foo"), layout: Some(Layout { size: 1, align: 1, packed: false }), kind: Comp(CompInfo { kind: Struct, fields: [], template_args: [], methods: [], constructors: [ItemId(9)], base_members: [], ref_template: None, inner_types: [], inner_vars: [], has_vtable: false, has_destructor: false, has_nonempty_base: false, has_non_type_template_params: false, packed: false, found_unknown_attr: false, detect_derive_debug_cycle: Cell { value: false }, detect_derive_default_cycle: Cell { value: false }, detect_has_destructor_cycle: Cell { value: false }, is_forward_declaration: false }), is_const: false }) }
/* automatically generated by rust-bindgen */

#[repr(C)]
#[derive(Debug, Copy)]
pub struct Foo {
    pub _address: u8,
}
#[test]
fn bindgen_test_layout_Foo() {
    assert_eq!(::std::mem::size_of::<Foo>() , 1usize , concat ! (
               "Size of: " , stringify ! ( Foo ) ));
    assert_eq! (::std::mem::align_of::<Foo>() , 1usize , concat ! (
                "Alignment of " , stringify ! ( Foo ) ));
}
impl Clone for Foo {
    fn clone(&self) -> Self { *self }
}

Answer 1 · 2017-03-04T05:07:41.000Z

    #[inline]
    pub unsafe fn new(a: ::std::os::raw::c_int) -> Self {
        let mut __bindgen_tmp = ::std::mem::uninitialized();
        Foo_Foo(&mut __bindgen_tmp, a);
        __bindgen_tmp
    }

This assumes that Foo is movable by byte-level copying. If it had internal pointers to itself, this would likely break. Without some Rust-level mechanism to call a method on moves, it's not going to be safe to directly embed C++ types in a Rust type. The C++ type either has to be Boxed or a C++ new allocation.

Answer 2 · 2017-03-30T18:53:34.000Z

ping @emilio. Any thoughts on this?

Answer 3 · 2017-03-30T20:50:25.000Z

This assumes that Foo is movable by byte-level copying. If it had internal pointers to itself, this would likely break. Without some Rust-level mechanism to call a method on moves, it's not going to be safe to directly embed C++ types in a Rust type. The C++ type either has to be Boxed or a C++ new allocation.

I assumed that rust would do RVO and avoid the move itself, but yeah, it'd be safer to just provide a construct function that took a &mut V or something like that.

Answer 4 · 2017-03-30T20:50:48.000Z

I'm looking into the code generation issue. Thanks for the ping, this got lost in a pile of other email :(

Answer 5 · 2017-04-03T10:53:33.000Z

Sorry for the lag here, got sidetracked. #606 allows configuring this from the command line, filled #607 for the memmovable requirement for constructors.

Answer 6 · 2017-04-12T02:17:46.000Z

This is fixed now.

Input C/C++ Header

Bindgen Invokation

Actual Results

Expected Results

RUST_LOG=bindgen Output

`RUST_LOG=bindgen` Output