If there were arithmetic operators that were not overloaded, Perl would invoke numeric conversion before using the builtin arithmetic operations, but I expect Math::GMP to overload all of them, so int may be the only built-in that actually invokes the numeric conversion.

I expect (but am not certain) that the '0+' overload is also invoked if an XSUB attempts to convert an object to an IV or UV. This is probably (but I have not traced the code) also how builtin arithmetic operations (which are not used on Math::GMP objects) would end up invoking it.

In reply to Re^5: How does Math::GMP overload the assignment operator ? (more guessing) by jcb
in thread How does Math::GMP overload the assignment operator ? by syphilis

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