Re: [Tinycc-devel] struct bug: identical named struct members

[Michael Matz]

Hello,

On Fri, 27 Nov 2020, Tyge Løvset wrote:

> Is this a known bug, or regression? 

Known bug.

> I tried to follow the code in parse_btype() in tccgen.c for the missing
> struct member symbol lookup check, but didn't succeed so far:
>
>       } else {
>             c = 0;
>             flexible = 0;
>             while (tok != '}') {
>                 if (!parse_btype(&btype, &ad1)) {
>     skip(';');
>     continue;
> }

Member lookup is linear, so checking for duplicates is quadratic, so TCC 
doesn't bother to do it.  The check would belong to struct_decl, not 
parse_btype, probably involving find_field before adding it.


Ciao,
Michael.