id	summary	reporter	owner	description	type	status	milestone	component	version	severity	resolution	keywords	cc
12155	variant does not support a class derived from variant as one of its types	Tobias Reh <treh@…>	Antony Polukhin	"variant does not support a class derived from variant as one of its types.
See the following example code:

{{{#!c++
struct A {};
struct B {};
struct C {};

struct AB : boost::variant<A, B> {};

using AB_C = boost::variant<AB, C>;

void foo() {
    AB ab;
    AB_C ab_c{ab}; // member function convert_construct is abiguous
}
}}}
"	Bugs	closed	Boost 1.62.0	variant	Boost 1.60.0	Problem	fixed