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Re: c99 support
From: |
Hans Åberg |
Subject: |
Re: c99 support |
Date: |
Fri, 29 Jun 2018 10:39:33 +0200 |
> On 29 Jun 2018, at 09:39, Andy Wingo <address@hidden> wrote:
>
> It would seem that the first four
> features of C99 are OK for all platforms that we target, with the
> following caveats:
>
> * We should avoid using C++ keywords (e.g. throw) in Guile API files.
>
> * We might want to avoid mixed decls and statements in inline functions
> in Guile API files.
>
> We should probably avoid stdbool.h and compound literals, for C++
> reasons.
You might make a separate C++ header: It turned out too complicated for Bison
to maintain the compile as C++ generated C parser.
> In Guile 3.0 (master branch), the types "scm_t_uint8" and so on are now
> deprecated. My recommendation is that all users switch to use
> e.g. "uint8_t", "ptrdiff_t", etc from <stdint.h> instead of the
> scm_t_uint8, etc definitions that they are now using. The definitions
> are compatible on all systems, AFAIU, and on GNU, scm_t_uint8 has long
> been a simple typedef for uint8_t.
For C++, these are only optional, cf. [1], as they require no padding. So an
alternative is to typedef the obligatory int_fast<2^k>_t types, perhaps leaving
the API unchanged.
1. https://en.cppreference.com/w/cpp/types/integer