& unsupported

[choffstein]

Just did a git pull to merge in any recent commits. Trying to do some ccalls where I need to pass a pointer to a scalar, but I can't even get it working repl.

julia> x = 0
0

julia> &x
not supported

Mac OS X 10.7.3.

[JeffBezanson]

&x is special syntax that is part of ccall.

[choffstein]

Hmm. Maybe I need to rebuild from source @JeffBezanson?

julia> s = "this is a test"
"this is a test"

julia> so = Array(Ptr{Uint8},1)
[Ptr{Uint8} @0x0000000000000000]

julia> sz = 0
0

julia> ccall(dlsym(_jl_zlib_wrapper, :_jl_zlib_deflate), Uint8, (Ptr{Uint8}, Ptr{Uint}, Ptr{Ptr{Uint8}}), cstring(s)[1], &sz, so)
unsupported expression type &

[JeffBezanson]

Oh, ok. That makes much more sense. Did you rebuild after pulling?

[choffstein]

Yep. Sorry -- even though I did the git pull, I forgot to make!

[dronir]

I'm getting this same thing with a version I pulled just last night.

julia> ccall(dlsym(libnetcdf, :nc_create), 
             Int32, 
             (Ptr{Uint8}, Int32, Ptr{Int32}), 
             (cstring(filename), NC_NOCLOBBER, &ID)))
unsupported expression type &

[JeffBezanson]

You have an extra set of parentheses around the arguments. Should be:

julia> ccall(dlsym(libnetcdf, :nc_create), 
             Int32, 
             (Ptr{Uint8}, Int32, Ptr{Int32}), 
             cstring(filename), NC_NOCLOBBER, &ID)

[dronir]

Ah, thanks, that cleared it. Shouldn't maybe have written that at 3am…