On 05/09/2011 03:24 AM, Lai Jiangshan wrote: > These VIR_XXXX0 APIs make us confused, use the non-0-suffix APIs instead. > > How these coversions works? The magic is using ##. > #define high_levle_api(fmt, ...) low_levle_api(fmt, ##__VA_ARGS__) > When __VA_ARGS__ is empty, "##" will swallow the "," in "fmt," to avoid compile error. ##__VA_ARGS__ is a GNU extension; it does not work on all C99 compilers. I'm worried that this is not portable. -- Eric Blake eblake@xxxxxxxxxx +1-801-349-2682 Libvirt virtualization library http://libvirt.org
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