Serhiy Storchaka <storchaka+cpyt...@gmail.com> added the comment:
Do you mean some concrete code? Several times I wished similar feature. To get
a UTF-8 cache if it exists and encode to UTF-8 without creating a cache
otherwise.
The private _PyUnicode_UTF8() macro could help
if ((s = _PyUnicode_UTF8(str))) {
size = _PyUnicode_UTF8_LENGTH(str);
tmpbytes = NULL;
}
else {
tmpbytes = _PyUnicode_AsUTF8String(str, "replace");
s = PyBytes_AS_STRING(tmpbytes);
size = PyBytes_GET_SIZE(tmpbytes);
}
but it is not even available outside of unicodeobject.c.
PyUnicode_BorrowUTF8() looks too complex for the public API. I am not sure that
it will be easy to implement it in PyPy. It also does not cover all use cases
-- sometimes you want to convert to UTF-8 but does not use any memory
allocation at all (either use an existing buffer or raise an error if there is
no cached UTF-8 or the string is not ASCII).
----------
nosy: +serhiy.storchaka
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<https://bugs.python.org/issue39087>
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