c - Declaring a typedef for a function returning a struct pointer? -

c - Declaring a typedef for a function returning a struct pointer? -

this extract header found in 3rd party library:

struct aifileio; struct aifile; // aifile write callback typedef size_t (*aifilewrite) (struct aifile*, const char*); // aifileio open callback typedef aifile* (*aifileopen) (struct aifileio*, const char*);

why lastly line not contain struct type specifier before homecoming type? in other words why lastly line not:

typedef struct aifile* (*aifileopen) (struct aifileio*, const char*);

which create clear function returns pointer struct aifile.

in case of import struct aifile defined in same header couple of lines later.

the explanation can think of header meant c++, don't need typedef struct names.

if header designed used c, that's bug since code won't build c.

c struct typedef