On Arch Linux with gcc 8.1.1;

```
...
In file included from ../sfi/glib-extra.hh:9,
                 from ../sfi/bcore.hh:10,
                 from ../sfi/sfiwrapper.hh:5,
                 from ../sfi/sfi.hh:7,
                 from bstbseutils.hh:4,
                 from bstutils.hh:4,
                 from bstkeybindings.hh:5,
                 from bstkeybindings.cc:2:
../aidacc/aida.hh: In instantiation of ‘struct 
Aida::Has__accept__<std::__cxx11::basic_string<char>, Bse::PspecVisitor, void>’:
../aidacc/visitor.hh:62:23:   required by substitution of ‘template<class A, 
typename std::enable_if<((((! Aida::Has__accept__<A, Bse::PspecVisitor, 
void>::value) && (! std::is_base_of<std::__cxx11::basic_string<char>, 
T>::value)) && (! Aida::DerivesVector<Vector>::value)) && 
std::is_class<A>::value), bool>::type <anonymous> > void 
Aida::VisitorDispatcher<Bse::PspecVisitor>::operator()<A, <enumerator> >(A&, 
Aida::VisitorDispatcher<Bse::PspecVisitor>::Name) [with A = 
std::__cxx11::basic_string<char>; typename std::enable_if<((((! 
Aida::Has__accept__<A, Bse::PspecVisitor, void>::value) && (! 
std::is_base_of<std::__cxx11::basic_string<char>, T>::value)) && (! 
Aida::DerivesVector<Vector>::value)) && std::is_class<A>::value), bool>::type 
<anonymous> = <missing>]’
bstapi_interfaces.hh:369:15:   required from ‘void 
Bst::SrvT_KeyBindingItem::__accept__(Visitor&) [with Visitor = 
Bse::PspecVisitor]’
../sfi/sfivisitors.hh:306:3:   required from ‘SfiRecFields 
Bse::sfi_pspecs_rec_fields_from_visitable(Visitable&) [with Visitable = 
Bst::SrvT_KeyBindingItem]’
bstkeybindings.cc:574:98:   required from here
../aidacc/aida.hh:166:73: error: ‘class std::__cxx11::basic_string<char>’ has 
no member named ‘__accept__’
 struct Has__accept__<T, V, void_t< decltype (std::declval<T>().template 
__accept__<V> (*(V*) NULL)) >> : std::true_type {};
                                              
~~~~~~~~~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~
../aidacc/aida.hh:166:73: error: ‘class std::__cxx11::basic_string<char>’ has 
no member named ‘__accept__’
../aidacc/aida.hh: In instantiation of ‘struct Aida::Has__accept__<double, 
Bse::PspecVisitor, void>’:
../aidacc/visitor.hh:62:23:   required by substitution of ‘template<class A, 
typename std::enable_if<((((! Aida::Has__accept__<A, Bse::PspecVisitor, 
void>::value) && (! std::is_base_of<std::__cxx11::basic_string<char>, 
T>::value)) && (! Aida::DerivesVector<Vector>::value)) && 
std::is_class<A>::value), bool>::type <anonymous> > void 
Aida::VisitorDispatcher<Bse::PspecVisitor>::operator()<A, <enumerator> >(A&, 
Aida::VisitorDispatcher<Bse::PspecVisitor>::Name) [with A = double; typename 
std::enable_if<((((! Aida::Has__accept__<A, Bse::PspecVisitor, void>::value) && 
(! std::is_base_of<std::__cxx11::basic_string<char>, T>::value)) && (! 
Aida::DerivesVector<Vector>::value)) && std::is_class<A>::value), bool>::type 
<anonymous> = <missing>]’
bstapi_interfaces.hh:371:15:   required from ‘void 
Bst::SrvT_KeyBindingItem::__accept__(Visitor&) [with Visitor = 
Bse::PspecVisitor]’
../sfi/sfivisitors.hh:306:3:   required from ‘SfiRecFields 
Bse::sfi_pspecs_rec_fields_from_visitable(Visitable&) [with Visitable = 
Bst::SrvT_KeyBindingItem]’
bstkeybindings.cc:574:98:   required from here
../aidacc/aida.hh:166:73: error: request for member 
‘__accept__<Bse::PspecVisitor>’ in ‘std::declval<double>()’, which is of 
non-class type ‘double’
../aidacc/aida.hh:166:73: error: request for member 
‘__accept__<Bse::PspecVisitor>’ in ‘std::declval<double>()’, which is of 
non-class type ‘double’
In file included from bstutils.hh:8,
                 from bstkeybindings.hh:5,
                 from bstkeybindings.cc:2:
bstapi_interfaces.hh: In instantiation of ‘void 
Bst::SrvT_KeyBindingItem::__accept__(Visitor&) [with Visitor = 
Bse::PspecVisitor]’:
../sfi/sfivisitors.hh:306:3:   required from ‘SfiRecFields 
Bse::sfi_pspecs_rec_fields_from_visitable(Visitable&) [with Visitable = 
Bst::SrvT_KeyBindingItem]’
bstkeybindings.cc:574:98:   required from here
bstapi_interfaces.hh:371:15: error: call of ‘(Bse::PspecVisitor) (double&, 
const char [11])’ is ambiguous
     _visitor_ (func_param, "func_param");
     ~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~
In file included from ../aidacc/aida.hh:1077,
                 from ../sfi/glib-extra.hh:9,
                 from ../sfi/bcore.hh:10,
                 from ../sfi/sfiwrapper.hh:5,
                 from ../sfi/sfi.hh:7,
                 from bstbseutils.hh:4,
                 from bstutils.hh:4,
                 from bstkeybindings.hh:5,
                 from bstkeybindings.cc:2:
../aidacc/visitor.hh:36:3: note: candidate: ‘void 
Aida::VisitorDispatcher<DerivedVisitor>::operator()(A&, 
Aida::VisitorDispatcher<DerivedVisitor>::Name) [with A = double; typename 
std::enable_if<std::is_floating_point<A>::value, bool>::type <anonymous> = 1; 
DerivedVisitor = Bse::PspecVisitor; 
Aida::VisitorDispatcher<DerivedVisitor>::Name = const char*]’
   operator() (A &a, Name n)
   ^~~~~~~~
../aidacc/visitor.hh:58:3: note: candidate: ‘void 
Aida::VisitorDispatcher<DerivedVisitor>::operator()(A&, 
Aida::VisitorDispatcher<DerivedVisitor>::Name) [with A = double; typename 
std::enable_if<Aida::Has__accept__<A, DerivedVisitor>::value, bool>::type 
<anonymous> = 1; DerivedVisitor = Bse::PspecVisitor; 
Aida::VisitorDispatcher<DerivedVisitor>::Name = const char*]’
   operator() (A &a, Name n)
   ^~~~~~~~
In file included from ../sfi/glib-extra.hh:9,
                 from ../sfi/bcore.hh:10,
                 from ../sfi/sfiwrapper.hh:5,
                 from ../sfi/sfi.hh:7,
                 from bstbseutils.hh:4,
                 from bstutils.hh:4,
                 from bstkeybindings.hh:5,
                 from bstkeybindings.cc:2:
../aidacc/aida.hh: In instantiation of ‘struct 
Aida::Has__accept__<std::__cxx11::basic_string<char>, Bse::ToRecVisitor, void>’:
../aidacc/visitor.hh:62:23:   required by substitution of ‘template<class A, 
typename std::enable_if<((((! Aida::Has__accept__<A, Bse::ToRecVisitor, 
void>::value) && (! std::is_base_of<std::__cxx11::basic_string<char>, 
T>::value)) && (! Aida::DerivesVector<Vector>::value)) && 
std::is_class<A>::value), bool>::type <anonymous> > void 
Aida::VisitorDispatcher<Bse::ToRecVisitor>::operator()<A, <enumerator> >(A&, 
Aida::VisitorDispatcher<Bse::ToRecVisitor>::Name) [with A = 
std::__cxx11::basic_string<char>; typename std::enable_if<((((! 
Aida::Has__accept__<A, Bse::ToRecVisitor, void>::value) && (! 
std::is_base_of<std::__cxx11::basic_string<char>, T>::value)) && (! 
Aida::DerivesVector<Vector>::value)) && std::is_class<A>::value), bool>::type 
<anonymous> = <missing>]’
bstapi_interfaces.hh:369:15:   required from ‘void 
Bst::SrvT_KeyBindingItem::__accept__(Visitor&) [with Visitor = 
Bse::ToRecVisitor]’
../sfi/sfivisitors.hh:167:5:   required from ‘void 
Bse::ToRecVisitor::visit_visitable(A&, 
Aida::VisitorDispatcher<Bse::ToRecVisitor>::Name) [with A = 
Bst::SrvT_KeyBindingItem; Aida::VisitorDispatcher<Bse::ToRecVisitor>::Name = 
const char*]’
../aidacc/visitor.hh:59:44:   required from ‘void 
Aida::VisitorDispatcher<DerivedVisitor>::operator()(A&, 
Aida::VisitorDispatcher<DerivedVisitor>::Name) [with A = 
Bst::SrvT_KeyBindingItem; typename std::enable_if<Aida::Has__accept__<A, 
DerivedVisitor>::value, bool>::type <anonymous> = 1; DerivedVisitor = 
Bse::ToRecVisitor; Aida::VisitorDispatcher<DerivedVisitor>::Name = const char*]’
../sfi/sfivisitors.hh:266:19:   required from ‘SfiSeq* 
Bse::sfi_seq_new_from_visitable(Visitable&) [with Visitable = 
Bst::SrvT_KeyBindingItemSeq; SfiSeq = _SfiSeq]’
bstkeybindings.cc:624:59:   required from here
../aidacc/aida.hh:166:73: error: ‘class std::__cxx11::basic_string<char>’ has 
no member named ‘__accept__’
 struct Has__accept__<T, V, void_t< decltype (std::declval<T>().template 
__accept__<V> (*(V*) NULL)) >> : std::true_type {};
                                              
~~~~~~~~~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~
../aidacc/aida.hh:166:73: error: ‘class std::__cxx11::basic_string<char>’ has 
no member named ‘__accept__’
../aidacc/aida.hh: In instantiation of ‘struct Aida::Has__accept__<double, 
Bse::ToRecVisitor, void>’:
../aidacc/visitor.hh:62:23:   required by substitution of ‘template<class A, 
typename std::enable_if<((((! Aida::Has__accept__<A, Bse::ToRecVisitor, 
void>::value) && (! std::is_base_of<std::__cxx11::basic_string<char>, 
T>::value)) && (! Aida::DerivesVector<Vector>::value)) && 
std::is_class<A>::value), bool>::type <anonymous> > void 
Aida::VisitorDispatcher<Bse::ToRecVisitor>::operator()<A, <enumerator> >(A&, 
Aida::VisitorDispatcher<Bse::ToRecVisitor>::Name) [with A = double; typename 
std::enable_if<((((! Aida::Has__accept__<A, Bse::ToRecVisitor, void>::value) && 
(! std::is_base_of<std::__cxx11::basic_string<char>, T>::value)) && (! 
Aida::DerivesVector<Vector>::value)) && std::is_class<A>::value), bool>::type 
<anonymous> = <missing>]’
bstapi_interfaces.hh:371:15:   required from ‘void 
Bst::SrvT_KeyBindingItem::__accept__(Visitor&) [with Visitor = 
Bse::ToRecVisitor]’
../sfi/sfivisitors.hh:167:5:   required from ‘void 
Bse::ToRecVisitor::visit_visitable(A&, 
Aida::VisitorDispatcher<Bse::ToRecVisitor>::Name) [with A = 
Bst::SrvT_KeyBindingItem; Aida::VisitorDispatcher<Bse::ToRecVisitor>::Name = 
const char*]’
../aidacc/visitor.hh:59:44:   required from ‘void 
Aida::VisitorDispatcher<DerivedVisitor>::operator()(A&, 
Aida::VisitorDispatcher<DerivedVisitor>::Name) [with A = 
Bst::SrvT_KeyBindingItem; typename std::enable_if<Aida::Has__accept__<A, 
DerivedVisitor>::value, bool>::type <anonymous> = 1; DerivedVisitor = 
Bse::ToRecVisitor; Aida::VisitorDispatcher<DerivedVisitor>::Name = const char*]’
../sfi/sfivisitors.hh:266:19:   required from ‘SfiSeq* 
Bse::sfi_seq_new_from_visitable(Visitable&) [with Visitable = 
Bst::SrvT_KeyBindingItemSeq; SfiSeq = _SfiSeq]’
bstkeybindings.cc:624:59:   required from here
../aidacc/aida.hh:166:73: error: request for member 
‘__accept__<Bse::ToRecVisitor>’ in ‘std::declval<double>()’, which is of 
non-class type ‘double’
../aidacc/aida.hh:166:73: error: request for member 
‘__accept__<Bse::ToRecVisitor>’ in ‘std::declval<double>()’, which is of 
non-class type ‘double’
In file included from bstutils.hh:8,
                 from bstkeybindings.hh:5,
                 from bstkeybindings.cc:2:
bstapi_interfaces.hh: In instantiation of ‘void 
Bst::SrvT_KeyBindingItem::__accept__(Visitor&) [with Visitor = 
Bse::ToRecVisitor]’:
../sfi/sfivisitors.hh:167:5:   required from ‘void 
Bse::ToRecVisitor::visit_visitable(A&, 
Aida::VisitorDispatcher<Bse::ToRecVisitor>::Name) [with A = 
Bst::SrvT_KeyBindingItem; Aida::VisitorDispatcher<Bse::ToRecVisitor>::Name = 
const char*]’
../aidacc/visitor.hh:59:44:   required from ‘void 
Aida::VisitorDispatcher<DerivedVisitor>::operator()(A&, 
Aida::VisitorDispatcher<DerivedVisitor>::Name) [with A = 
Bst::SrvT_KeyBindingItem; typename std::enable_if<Aida::Has__accept__<A, 
DerivedVisitor>::value, bool>::type <anonymous> = 1; DerivedVisitor = 
Bse::ToRecVisitor; Aida::VisitorDispatcher<DerivedVisitor>::Name = const char*]’
../sfi/sfivisitors.hh:266:19:   required from ‘SfiSeq* 
Bse::sfi_seq_new_from_visitable(Visitable&) [with Visitable = 
Bst::SrvT_KeyBindingItemSeq; SfiSeq = _SfiSeq]’
bstkeybindings.cc:624:59:   required from here
bstapi_interfaces.hh:371:15: error: call of ‘(Bse::ToRecVisitor) (double&, 
const char [11])’ is ambiguous
     _visitor_ (func_param, "func_param");
     ~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~
In file included from ../aidacc/aida.hh:1077,
                 from ../sfi/glib-extra.hh:9,
                 from ../sfi/bcore.hh:10,
                 from ../sfi/sfiwrapper.hh:5,
                 from ../sfi/sfi.hh:7,
                 from bstbseutils.hh:4,
                 from bstutils.hh:4,
                 from bstkeybindings.hh:5,
                 from bstkeybindings.cc:2:
../aidacc/visitor.hh:36:3: note: candidate: ‘void 
Aida::VisitorDispatcher<DerivedVisitor>::operator()(A&, 
Aida::VisitorDispatcher<DerivedVisitor>::Name) [with A = double; typename 
std::enable_if<std::is_floating_point<A>::value, bool>::type <anonymous> = 1; 
DerivedVisitor = Bse::ToRecVisitor; 
Aida::VisitorDispatcher<DerivedVisitor>::Name = const char*]’
   operator() (A &a, Name n)
   ^~~~~~~~
../aidacc/visitor.hh:58:3: note: candidate: ‘void 
Aida::VisitorDispatcher<DerivedVisitor>::operator()(A&, 
Aida::VisitorDispatcher<DerivedVisitor>::Name) [with A = double; typename 
std::enable_if<Aida::Has__accept__<A, DerivedVisitor>::value, bool>::type 
<anonymous> = 1; DerivedVisitor = Bse::ToRecVisitor; 
Aida::VisitorDispatcher<DerivedVisitor>::Name = const char*]’
   operator() (A &a, Name n)
   ^~~~~~~~
In file included from ../sfi/glib-extra.hh:9,
                 from ../sfi/bcore.hh:10,
                 from ../sfi/sfiwrapper.hh:5,
                 from ../sfi/sfi.hh:7,
                 from bstbseutils.hh:4,
                 from bstutils.hh:4,
                 from bstkeybindings.hh:5,
                 from bstkeybindings.cc:2:
../aidacc/aida.hh: In instantiation of ‘struct 
Aida::Has__accept__<std::__cxx11::basic_string<char>, Bse::FromRecVisitor, 
void>’:
../aidacc/visitor.hh:62:23:   required by substitution of ‘template<class A, 
typename std::enable_if<((((! Aida::Has__accept__<A, Bse::FromRecVisitor, 
void>::value) && (! std::is_base_of<std::__cxx11::basic_string<char>, 
T>::value)) && (! Aida::DerivesVector<Vector>::value)) && 
std::is_class<A>::value), bool>::type <anonymous> > void 
Aida::VisitorDispatcher<Bse::FromRecVisitor>::operator()<A, <enumerator> >(A&, 
Aida::VisitorDispatcher<Bse::FromRecVisitor>::Name) [with A = 
std::__cxx11::basic_string<char>; typename std::enable_if<((((! 
Aida::Has__accept__<A, Bse::FromRecVisitor, void>::value) && (! 
std::is_base_of<std::__cxx11::basic_string<char>, T>::value)) && (! 
Aida::DerivesVector<Vector>::value)) && std::is_class<A>::value), bool>::type 
<anonymous> = <missing>]’
bstapi_interfaces.hh:369:15:   required from ‘void 
Bst::SrvT_KeyBindingItem::__accept__(Visitor&) [with Visitor = 
Bse::FromRecVisitor]’
../sfi/sfivisitors.hh:222:9:   required from ‘void 
Bse::FromRecVisitor::visit_visitable(A&, 
Aida::VisitorDispatcher<Bse::FromRecVisitor>::Name) [with A = 
Bst::SrvT_KeyBindingItem; Aida::VisitorDispatcher<Bse::FromRecVisitor>::Name = 
const char*]’
../aidacc/visitor.hh:59:44:   required from ‘void 
Aida::VisitorDispatcher<DerivedVisitor>::operator()(A&, 
Aida::VisitorDispatcher<DerivedVisitor>::Name) [with A = 
Bst::SrvT_KeyBindingItem; typename std::enable_if<Aida::Has__accept__<A, 
DerivedVisitor>::value, bool>::type <anonymous> = 1; DerivedVisitor = 
Bse::FromRecVisitor; Aida::VisitorDispatcher<DerivedVisitor>::Name = const 
char*]’
../sfi/sfivisitors.hh:249:19:   required from ‘void 
Bse::sfi_seq_to_visitable(SfiSeq*, Visitable&) [with Visitable = 
Bst::SrvT_KeyBindingItemSeq; SfiSeq = _SfiSeq]’
bstkeybindings.cc:665:51:   required from here
../aidacc/aida.hh:166:73: error: ‘class std::__cxx11::basic_string<char>’ has 
no member named ‘__accept__’
 struct Has__accept__<T, V, void_t< decltype (std::declval<T>().template 
__accept__<V> (*(V*) NULL)) >> : std::true_type {};
                                              
~~~~~~~~~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~
../aidacc/aida.hh:166:73: error: ‘class std::__cxx11::basic_string<char>’ has 
no member named ‘__accept__’
../aidacc/aida.hh: In instantiation of ‘struct Aida::Has__accept__<double, 
Bse::FromRecVisitor, void>’:
../aidacc/visitor.hh:62:23:   required by substitution of ‘template<class A, 
typename std::enable_if<((((! Aida::Has__accept__<A, Bse::FromRecVisitor, 
void>::value) && (! std::is_base_of<std::__cxx11::basic_string<char>, 
T>::value)) && (! Aida::DerivesVector<Vector>::value)) && 
std::is_class<A>::value), bool>::type <anonymous> > void 
Aida::VisitorDispatcher<Bse::FromRecVisitor>::operator()<A, <enumerator> >(A&, 
Aida::VisitorDispatcher<Bse::FromRecVisitor>::Name) [with A = double; typename 
std::enable_if<((((! Aida::Has__accept__<A, Bse::FromRecVisitor, void>::value) 
&& (! std::is_base_of<std::__cxx11::basic_string<char>, T>::value)) && (! 
Aida::DerivesVector<Vector>::value)) && std::is_class<A>::value), bool>::type 
<anonymous> = <missing>]’
bstapi_interfaces.hh:371:15:   required from ‘void 
Bst::SrvT_KeyBindingItem::__accept__(Visitor&) [with Visitor = 
Bse::FromRecVisitor]’
../sfi/sfivisitors.hh:222:9:   required from ‘void 
Bse::FromRecVisitor::visit_visitable(A&, 
Aida::VisitorDispatcher<Bse::FromRecVisitor>::Name) [with A = 
Bst::SrvT_KeyBindingItem; Aida::VisitorDispatcher<Bse::FromRecVisitor>::Name = 
const char*]’
../aidacc/visitor.hh:59:44:   required from ‘void 
Aida::VisitorDispatcher<DerivedVisitor>::operator()(A&, 
Aida::VisitorDispatcher<DerivedVisitor>::Name) [with A = 
Bst::SrvT_KeyBindingItem; typename std::enable_if<Aida::Has__accept__<A, 
DerivedVisitor>::value, bool>::type <anonymous> = 1; DerivedVisitor = 
Bse::FromRecVisitor; Aida::VisitorDispatcher<DerivedVisitor>::Name = const 
char*]’
../sfi/sfivisitors.hh:249:19:   required from ‘void 
Bse::sfi_seq_to_visitable(SfiSeq*, Visitable&) [with Visitable = 
Bst::SrvT_KeyBindingItemSeq; SfiSeq = _SfiSeq]’
bstkeybindings.cc:665:51:   required from here
../aidacc/aida.hh:166:73: error: request for member 
‘__accept__<Bse::FromRecVisitor>’ in ‘std::declval<double>()’, which is of 
non-class type ‘double’
../aidacc/aida.hh:166:73: error: request for member 
‘__accept__<Bse::FromRecVisitor>’ in ‘std::declval<double>()’, which is of 
non-class type ‘double’
In file included from bstutils.hh:8,
                 from bstkeybindings.hh:5,
                 from bstkeybindings.cc:2:
bstapi_interfaces.hh: In instantiation of ‘void 
Bst::SrvT_KeyBindingItem::__accept__(Visitor&) [with Visitor = 
Bse::FromRecVisitor]’:
../sfi/sfivisitors.hh:222:9:   required from ‘void 
Bse::FromRecVisitor::visit_visitable(A&, 
Aida::VisitorDispatcher<Bse::FromRecVisitor>::Name) [with A = 
Bst::SrvT_KeyBindingItem; Aida::VisitorDispatcher<Bse::FromRecVisitor>::Name = 
const char*]’
../aidacc/visitor.hh:59:44:   required from ‘void 
Aida::VisitorDispatcher<DerivedVisitor>::operator()(A&, 
Aida::VisitorDispatcher<DerivedVisitor>::Name) [with A = 
Bst::SrvT_KeyBindingItem; typename std::enable_if<Aida::Has__accept__<A, 
DerivedVisitor>::value, bool>::type <anonymous> = 1; DerivedVisitor = 
Bse::FromRecVisitor; Aida::VisitorDispatcher<DerivedVisitor>::Name = const 
char*]’
../sfi/sfivisitors.hh:249:19:   required from ‘void 
Bse::sfi_seq_to_visitable(SfiSeq*, Visitable&) [with Visitable = 
Bst::SrvT_KeyBindingItemSeq; SfiSeq = _SfiSeq]’
bstkeybindings.cc:665:51:   required from here
bstapi_interfaces.hh:371:15: error: call of ‘(Bse::FromRecVisitor) (double&, 
const char [11])’ is ambiguous
     _visitor_ (func_param, "func_param");
     ~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~
In file included from ../aidacc/aida.hh:1077,
                 from ../sfi/glib-extra.hh:9,
                 from ../sfi/bcore.hh:10,
                 from ../sfi/sfiwrapper.hh:5,
                 from ../sfi/sfi.hh:7,
                 from bstbseutils.hh:4,
                 from bstutils.hh:4,
                 from bstkeybindings.hh:5,
                 from bstkeybindings.cc:2:
../aidacc/visitor.hh:36:3: note: candidate: ‘void 
Aida::VisitorDispatcher<DerivedVisitor>::operator()(A&, 
Aida::VisitorDispatcher<DerivedVisitor>::Name) [with A = double; typename 
std::enable_if<std::is_floating_point<A>::value, bool>::type <anonymous> = 1; 
DerivedVisitor = Bse::FromRecVisitor; 
Aida::VisitorDispatcher<DerivedVisitor>::Name = const char*]’
   operator() (A &a, Name n)
   ^~~~~~~~
../aidacc/visitor.hh:58:3: note: candidate: ‘void 
Aida::VisitorDispatcher<DerivedVisitor>::operator()(A&, 
Aida::VisitorDispatcher<DerivedVisitor>::Name) [with A = double; typename 
std::enable_if<Aida::Has__accept__<A, DerivedVisitor>::value, bool>::type 
<anonymous> = 1; DerivedVisitor = Bse::FromRecVisitor; 
Aida::VisitorDispatcher<DerivedVisitor>::Name = const char*]’
   operator() (A &a, Name n)
   ^~~~~~~~
In file included from ../sfi/sfiwrapper.hh:5,
                 from ../sfi/sfi.hh:7,
                 from bstbseutils.hh:4,
                 from bstutils.hh:4,
                 from bstkeybindings.hh:5,
                 from bstkeybindings.cc:2:
../sfi/bcore.hh: In function ‘void Bse::warning(const char*, const Args& ...) 
[with Args = {char [26], long unsigned int}]’:
../sfi/bcore.hh:252:1: warning: ‘noreturn’ function does return
 }
 ^
make[3]: *** [Makefile:799: bstkeybindings.o] Error 1
make[3]: Leaving directory '/home/milk/src/beast/beast-gtk'
make[2]: *** [Makefile:835: all-recursive] Error 1
make[2]: Leaving directory '/home/milk/src/beast/beast-gtk'
make[1]: *** [Makefile:1667: all-recursive] Error 1
make[1]: Leaving directory '/home/milk/src/beast'
make: *** [Makefile:1055: all] Error 2
make  1360.89s user 84.01s system 98% cpu 24:26.09 total
```

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