Functor initialization failure for value based argument with const argument.

[eigen-frog]

Method -

unsigned int Person::getAge(const Date);

Accessing it at runtime, obtaing the functor as,

auto getAge = fnGetAge->targetT< Person >()
.argsT< const nsdate::Date >()
.returnT();

fails to initialize the functor with error : rtl::error::SignatureMismatch

but,

auto getAge = fnGetAge->targetT< Person >()
.argsT< const nsdate::Date >()
.returnT< unsigned >();
succeeds,

The difference in arguments used to materialize the functor , Date & const Date

Expecetd behaviour,
It should work regardless of 'const' for value based arguments.