Capture docstring using Macrotools

General Usage
1

Hoping this is trivial, but let’s see. The task is to extract documentation from a parsed struct definition using MacroTools. I also checked that splitstructdef fails in this case.

using MacroTools

sexpr = Meta.parse("""
    "You can't extract me na-na-na-na!"
    struct Foo
        x
    end
""")

function getdocs(ex::Expr)
    if @capture(ex, @doc str_ struct name_
        body__
    end)
        return str
    end
end

@show getdocs(sexpr) # getdocs(sexpr) = nothing

If I look at dump(sexpr) I can see that the structure changes depending on how I annotate the struct. The above leaves a GlobalRef to Core.@doc, which I don’t know how to pattern match. If I annotate using @doc as in the pattern, I can get the docstring out successfully.

Any ideas? My end goal is to parse a bunch of strings that may contain structs and docstrings, and group them by identical struct definitions (fields + name).