Some problems about embind

[Qiang Li]

Hi

    I encountered some problems in using embind. I have a function in class which parameter is an original pointer of char type. When I registered the function with embind, I got the following error, hoping to get an answer.

[Qiang Li]

Hi

    I encountered some problems in using embind. I have a function in class which parameter is an original pointer of char type. When I registered the function with embind, I got the following error, hoping to get an answer.

error log:

    emsdk-1.39.20/upstream/emscripten/system/include/emscripten/wire.h:120:13: error: static_assert failed due to requirement '!std::is_pointer<unsigned char *>::value' "Implicitly binding raw pointers is illegal.  Specify allow_raw_pointer<arg<?>>"

            static_assert(!std::is_pointer<T*>::value, "Implicitly binding raw pointers is illegal.  Specify allow_raw_pointer<arg<?>>");

code:

   std::vector<re> Wasm_bind_test::decete_wasm(unsigned char *rgba_) {}

    EMSCRIPTEN_BINDINGS(my_class) {

emscripten::class_<Wasm_bind_test>("Wasm_bind_test")

.constructor<>()

.function("decete_init",&Wasm_bind_test::decete_init)

.function("decete_wasm",&Wasm_bind_test::decete_wasm)

;

emscripten::register_vector<re>("Vectorresult");

emscripten::value_object<re>("re")

.field("left",&re::left)

.field("top",&re::top)

.field("right",&re::right)

.field("bottom",&re::bottom)

;

};

[Shachar Langbeheim]

https://emscripten.org/docs/porting/connecting_cpp_and_javascript/embind.html#embind-raw-pointers
Using raw pointers isn't allowed by default. In order to do it requires explicitly stating that you do it.

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[Qiang Li]

Thank you for response!

    But I added allow_raw_pointers() When running, JS will report the error "Cannot call Wasm_bind_test.decete_wasm due to unbound types: Ph", what is the reason for this error?

Shachar Langbeheim <nih...@gmail.com> 于2021年6月21日周一 下午4:50写道：

To view this discussion on the web visit https://groups.google.com/d/msgid/emscripten-discuss/CA%2B_KjGa4VvfVe2nx9p50M8pRmdvRFK9L9kt%3DEGqrfL0%3DHaZG2Q%40mail.gmail.com.

[Qiang Li]

Thank you for response!

    But I added allow_raw_pointers() When running, JS will report the error "Cannot call Wasm_bind_test.decete_wasm due to unbound types: Ph", what is the reason for this error?

[Shachar Langbeheim]

Did you bind Ph?

To view this discussion on the web visit https://groups.google.com/d/msgid/emscripten-discuss/a86df1fd-aeb2-42c2-a7db-206ed5c292c0n%40googlegroups.com.

[Qiang Li]

EMSCRIPTEN_BINDINGS(my_class) {

emscripten::class_<Wasm_bind_test>("Wasm_bind_test")

.constructor<>()

.function("decete_init",&Wasm_bind_test::decete_init)

.function("decete_wasm",&Wasm_bind_test::decete_wasm, allow_raw_pointers())

;

Is it bound as in the above code？add allow_raw_pointers()

[Qiang Li]

The argument in my function is a "unsigned char *ptr" ,What should I do in .function()?

在2021年6月23日星期三 UTC+8 下午4:12:55<nih...@gmail.com> 写道：