Hello,
I am trying to use a simple C++ program containing using *std::function* with
Embind. However, the latter does not seem to recognize *std::function*.
More specifically, here is the example I used:
*Foo.cpp*
#include <functional>
#include <emscripten/bind.h>
using namespace emscripten;
int bar(std::function<int(int)> func, int num) {
return func(num);
}
EMSCRIPTEN_BINDINGS(Foo) {
function("bar", &bar);
}
*Foo.html*
<!doctype html>
<html>
<script src="foo.js"></script>
<script>
console.log('Foo: ' + Module.bar);
</script>
</html>
*Compilation*
*$* emcc --bind foo.cpp -o foo.js
The compilation succeeds with no errors or warnings. You may find the
generated *foo.js* attached.
*Result*
<https://lh3.googleusercontent.com/-cbSwX8ZiNag/WWNzyjMIwsI/AAAAAAAAKUA/06dRJmG-0C4b3_jHxB1c_Eu1Mny5947ZQCLcBGAs/s1600/Screen%2BShot%2B2017-07-10%2Bat%2B14.57.05.png>
I also tried to compile and/or run the test files of Embind (see
embind_test.cpp
<https://github.com/kripken/emscripten/blob/master/tests/embind/embind_test.cpp>
and embind.test.js
<https://github.com/kripken/emscripten/blob/master/tests/embind/embind.test.js>),
which also contain function that use *std::function* (e.g.
emval_test_get_function_ptr
(definition)
<https://github.com/kripken/emscripten/blob/master/tests/embind/embind_test.cpp#L153>
/ emval_test_get_function_ptr (binding)
<https://github.com/kripken/emscripten/blob/master/tests/embind/embind_test.cpp#L1780>),
with exactly the same command and they *do work fine*:
*Result*
<https://lh3.googleusercontent.com/-9Cn4jyhAPzg/WWN1pN3B8TI/AAAAAAAAKUQ/x_t2dM-qyi8n6hTcIf968IQSaxmfFxoDACLcBGAs/s1600/Screen%2BShot%2B2017-07-10%2Bat%2B14.56.02.png>
*Generated source code*
<https://lh3.googleusercontent.com/-80B9SjRLHME/WWN16hbcMCI/AAAAAAAAKUU/ZzP2QEes3Pk0gacNafhtMMgyUAazTTEkwCLcBGAs/s1600/Screen%2BShot%2B2017-07-10%2Bat%2B14.55.53.png>
I should also mention that I tried many different combinations, e.g.
*std::function* with different types, as return type, as argument, as an
independent function (like in the above example), as a class or struct
method, but had no luck.
Any ideas would prove of great help.
Thank you very much, in advance.
― Vangelis
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