On Thursday, 5 January 2023 at 09:10:00 UTC, areYouSureAboutThat
wrote:
My question is: why is there no bounds checking occurring if I
forget to use -betterC?
module test;
extern(C) void main()
Note that whether bounds checking is performed depends on
[compiler
switches](https://dlang.org/dmd-windows.html#switch-boundscheck),
and that there is a mode where `@safe` functions are checked, but
`@system` functions (which your `main` appears to be) are not.
This mode is the default for `-release` builds:
```
-boundscheck=[on|safeonly|off ]
Controls if bounds checking is enabled.
on: Bounds checks are enabled for all code. This is the
default.
safeonly: Bounds checks are enabled only in @safe code. This
is the default for -release builds.
off: Bounds checks are disabled completely (even in @safe
code). This option should be used with caution and as a last
resort to improve performance. Confirm turning off @safe bounds
checks is worthwhile by benchmarking.
```
So, if you want bounds checking, make sure you either have
`-boundscheck=on`, or use an `@safe` function together with
`-boundscheck=safeonly`.
