I found that under win32 the CPerlHost class contains a IPerlStdIO interface which contains, among other things, an fopen (const char *filename, const char *mode) implementation.

I see that the implementation of this function, under Win32, when Wide API is enabled, when the "use bytes" pragma is not in effect, will treat the parameters as being UTF-8.

But, Perl treats strings as byte or utf8 on a string-by-string basis, and is lazy about switching to the utf8 representation.

So my question is: does the interpreter force the string to be promoted when making some internal function calls? Where does the opcode generated by the open command actually call the native code?

—John

In reply to Anatomy of 'perl', the interpreter by John M. Dlugosz

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