Re: [Tinycc-devel] [BUG] assertion failure when compiling initialization of array of structs on x86_64

[grischka]

Michael Matz wrote: ---
> So, for this code:
>
> struct S { int i;}
> void f(struct S *s) { struct S y[1] = { *x }; }
> void g(struct S *s) { struct S y[1] = { { x->i } }; }
>
> TCC needs to differ between both cases and when parsing the LHS needs to 
> dive into the type struct S for function g() but not for function f(), 
> i.e. it needs to do that based on the form of the RHS.

I can't help, but such subtle complexity feels more like gcc than
like C in general.

The "normal" rule is that if nested braces are omitted then each
member of the sub-struct (or sub-array) is assigned one by one
from the remaining flat list.

Which is what tcc does, in the f() case with the result of:

   test.c:13: error: cannot cast 'struct S' to 'int'

As well as MS's cl for instance:

   test.c(13) : error C2440: 'initializing' : cannot convert from 'S' to 'int'

> At that point I got distracted then :)

Me too now ... ;)