Is there a `with` operator or usage pattern?

New to Julia
11

If we could generate a function f as below, then you could just splat the NamedTuple into the keyword parameters of f

subtotal = (price=12.99, shipping=3.99)
f(; price, shipping) = price + shipping
f(; subtotal ...) # 16.98

I feel like I’m almost there:

julia> subtotal = (price=12.99, shipping=3.99)
(price = 12.99, shipping = 3.99)

julia> function genfunc(nt, body)
           local props = propertynames(nt)
               f = :( (; $(props...) )-> $body )
           g = Meta.eval(f)
           Base.invokelatest(g; nt...)
       end
genfunc (generic function with 1 method)

julia> genfunc(subtotal, quote
           shipping + price
       end)
16.98