Hello. I try using destructor in betterC code and it's work if outer function doesn't return value (void). Code in `scope (exit)` works as same (if func is void all is ok).

In documentation I found https://dlang.org/spec/betterc.html#consequences 12 paragraph: Struct deconstructors.

Why struct destructor need Druntime? Compiler must simply past call of destructor before exit from scope or return statement. Where is Druntime here (dynamic allocations, pointers to scopes and other)?

I think struct destructor must work in betterC code. Otherwise it will be one step to be likeC, not betterC.

On Monday, 11 September 2017 at 10:18:41 UTC, Oleg B wrote:
> Hello. I try using destructor in betterC code and it's work if outer function doesn't return value (void). Code in `scope (exit)` works as same (if func is void all is ok).
>
> In documentation I found https://dlang.org/spec/betterc.html#consequences 12 paragraph: Struct deconstructors.
>
> Why struct destructor need Druntime? Compiler must simply past call of destructor before exit from scope or return statement. Where is Druntime here (dynamic allocations, pointers to scopes and other)?
>
> I think struct destructor must work in betterC code. Otherwise it will be one step to be likeC, not betterC.

+1 I don't see the reason.
If struct destructors were working correctly in betterC mode, it would be possible to use RAII.
Missing RAII is a main reason of WTF messages when people see list of betterC limitations.

On Monday, 11 September 2017 at 10:18:41 UTC, Oleg B wrote:
> Hello. I try using destructor in betterC code and it's work if outer function doesn't return value (void). Code in `scope (exit)` works as same (if func is void all is ok).
>
> In documentation I found https://dlang.org/spec/betterc.html#consequences 12 paragraph: Struct deconstructors.
>
> [...]

It's an implementation isssue [1][2][3].

[1] https://issues.dlang.org/show_bug.cgi?id=17603
[2] https://github.com/dlang/dmd/pull/6923
[3] https://www.reddit.com/r/programming/comments/6ijwek/dlangs_dmd_now_compiles_programs_in_betterc_mode/dj7dncc/