C++ wrapping tutorial

[TeroFrondelius]

Hi,
I have been couples of days learning (struggling) Clang.jl. I like the idea and I think this package could really boost scientific calculations, when people could be building on top of existing libraries.

First really hard part was to get the package to building. I used this this type of trick (found somewhere else):

Pkg.checkout("Clang","master")
Pkg.build("Clang")

Secondly I tried to follow this https://github.com/ihnorton/Clang.jl#implementation
That really haven't helped so far, the ratio between code complexity and commenting is above my skills.

Then I looked the tests and I thought I found something useful: https://github.com/ihnorton/Clang.jl/blob/master/test/test_classparents.jl
The problem is that it's not doing enough to work as a tutorial.

Also the current documentation is not really helping, when the whole wrap_cpp is missing from there.

If I could get this type of tutorial for c++, it really would help to the start

using Clang.wrap_c

context = wrap_c.init(; output_file="libjpeg.jl", header_library=x->"libjpeg", common_file="libjpeg_h.jl", clang_diagnostics=true)
context.options.wrap_structs = true
wrap_c.wrap_c_headers(context, ["/usr/include/jpeglib.h"])

[ihnorton]

check out github.com/Keno/Cxx.jl for the industrial-strength version.

On Sun, Jun 7, 2015 at 11:57 AM, Tero Frondelius [email protected]
wrote:

Hi,
I have been couples of days learning (struggling) Clang.jl. I like the
idea and I think this package could really boost scientific calculations,
when people could be building on top of existing libraries.

First really hard part was to get the package to building. I used this
this type of trick (found somewhere else):

Pkg.checkout("Clang","master")
Pkg.build("Clang")

Secondly I tried to follow this
https://github.com/ihnorton/Clang.jl#implementation
That really haven't helped so far, the ratio between code complexity and
commenting is above my skills.

Then I looked the tests and I thought I found something useful:
https://github.com/ihnorton/Clang.jl/blob/master/test/test_classparents.jl
The problem is that it's not doing enough to work as a tutorial.

Also the current documentation is not really helping, when the whole
wrap_cpp is missing from there.

If I could get this type of tutorial for c++, it really would help to the
start

using Clang.wrap_c

context = wrap_c.init(; output_file="libjpeg.jl", header_library=x->"libjpeg", common_file="libjpeg_h.jl", clang_diagnostics=true)
context.options.wrap_structs = true
wrap_c.wrap_c_headers(context, ["/usr/include/jpeglib.h"])

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[TeroFrondelius]

Thanks. I actually started by Cxx.jl. I just couldn't get Julia to compile with all those needed stuff. I gave up after three long nights. Maybe I will give another try.

[stemann]

Do Cxx provide an automatic wrapper generator?

Clang.jl fails to parse/translate/wrap the following C++ enum:

enum CpuFeatures {
    CPU_MMX             = 1
};

from https://github.com/opencv/opencv/blob/master/modules/core/include/opencv2/core/cvdef.h#L161

with the error:

ERROR: LoadError: Unknown EnumConstantDecl type: CLType (Clang.cindex.Enum) cursor: CLCursor (Clang.cindex.EnumConstantDecl) CPU_MMX
Stacktrace:
[1] value(::Clang.cindex.EnumConstantDecl) at /Users/jsa/.julia/v0.6/Clang/src/cindex.jl:162

[Gnimuc]

Now you can use https://github.com/grasph/wrapit.