Parse constant from enviroment - macro parameter string interpolation

New to Julia
, ,
4

The solution is $("$name").

Full code:

macro const_from_env(const_name::Symbol, const_type::Symbol, default_value)
    esc(quote
        const $(const_name) = parse($(const_type),
            get(ENV, $("$const_name"), $("$default_value")))
    end)
end

@const_from_env CONST3 UInt16 30
@assert 30 == CONST3