Support redefining nested anonymous struct within anonymous struct about cffi-lua HOT 2 CLOSED

the problem here is slightly different than you think it is; note how you don't need bar_t definition at all to raise the same error

cffi never takes contents of anon structs into account when choosing a name for them, and it never considers contents for redefinitions (only name); the problem here is that when foo_t is anonymous, and its inner struct is anonymous, by the time the inner struct is parsed the outer struct is not committed into the storage yet, and the name for anonymous structs is chosen like "take the number of structs already in storage, and use that". Which means, both of those structures get named struct 0.

from cffi-lua.

Ah, OK, I see. Yeah, I was able to simplify the test case to the first definition as you said:

ffi.cdef[[
    typedef struct {
        struct {
            uint32_t a;
        } inner1;
    } foo_t;
]] -- expected: no error, get: input:1: 'struct 0' redefined

from cffi-lua.