On Mon, Mar 21, 2022 at 10:51 AM Rowan Tommins <rowan.coll...@gmail.com>
wrote:
> On 20/03/2022 13:39, Rowan Tommins wrote:
> > Using a second colon would make ternary expressions slightly awkward;
> > C# handles this by requiring them to be parenthesised, so "{$:( $test
> > ? $x : $y )}" would be valid but "{$:$test ? $x : $y}" would not; we
> > could use some other delimiter, but they'd probably all need something
> > similar.
>
>
> Thinking about it, a second colon might also cause problems for
> expressions like "{$: Foo::bar() }", so since we have multiple symbols
> at the start anyway, how about a prefixed formatting argument, e.g.
> "{$%10.3f: $x }"
>
> Regards,
>
> --
> Rowan Tommins
> [IMSoP]
>
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>
The downside of a prefix is that it isn't backwards compatible. You could
use # in a suffix so if you need to write backwards compatible code, you
can. So maybe:
echo "{$x#10.3f}";
which can be written like this in backwards compatible code:
echo "{$x#10.3f
}";
It isn't pretty, but it's better than a parse error and things like Rector
could do this automatically.
