Could we support something similar to nim's compilation option pragmas [1]:

```
{.push checks: off.}
# compile this section without runtime checks as it is speed critical
# ... some code ...
{.pop.} # restore old settings
```

in D could look like:

```
pragma(push, "-noboundscheck -O -release");
// compile this section with specified flags as it's critical
pragma(pop);
```

[1] http://nim-lang.org/docs/manual.html#pragmas-compilation-option-pragmas

On Sunday, 18 December 2016 at 04:46:34 UTC, Timothee Cour wrote:
> Could we support something similar to nim's compilation option pragmas [1]:
>
> ```
> {.push checks: off.}
> # compile this section without runtime checks as it is speed critical
> # ... some code ...
> {.pop.} # restore old settings
> ```
>
> in D could look like:
>
> ```
> pragma(push, "-noboundscheck -O -release");
> // compile this section with specified flags as it's critical
> pragma(pop);
> ```
>
> [1] http://nim-lang.org/docs/manual.html#pragmas-compilation-option-pragmas

That approach has a number of problems.
Basically the optimizer works at module scope, I'd be difficult to constrain it's use.
Secondly what happens if conflicting options are nested ?

On Sunday, 18 December 2016 at 04:46:34 UTC, Timothee Cour wrote:
> Could we support something similar to nim's compilation option pragmas [1]:
>
> ```
> {.push checks: off.}
> # compile this section without runtime checks as it is speed critical
> # ... some code ...
> {.pop.} # restore old settings
> ```
>
> in D could look like:
>
> ```
> pragma(push, "-noboundscheck -O -release");
> // compile this section with specified flags as it's critical
> pragma(pop);
> ```
>
> [1] http://nim-lang.org/docs/manual.html#pragmas-compilation-option-pragmas

Afaik this Nim feature is inspired from Object Pascal: http://www.freepascal.org/docs-html/3.0.0/prog/progsu63.html.