Re: nothrow and std.exception.ifThrown

[Imperatorn via Digitalmars-d-learn]

On Thursday, 29 April 2021 at 16:02:20 UTC, novice2 wrote:

Hello.
I need use std.format.format() in nothrow function.
format() can throw.
For this case i have special default string.
I don't want embrace format into try..catch block,
and i found elegant std.exception.ifThrown.
But DMD say "ifThrown not nothrow"

https://run.dlang.io/is/kXtt5q
```d
nothrow string foo(int x, string def) {
    import std.format: format;
    import std.exception: ifThrown;

    return format("%d", x).ifThrown(def);
}

Error: function std.exception.ifThrown!(Exception, string, string).ifThrown is not nothrow

```

What i can use instead of ifThrown, or how it can be changed to nothrow?

Thanks.

Try adding scope(failure) assert(0); in foo