Why not use something like
if token.in(EOL,EOF) …
with varadic args this is trivial.
And with generics you probably only need to write a single ‘in’ function
(haven’t tested).
> On Mar 18, 2025, at 6:50 PM, Mike Schinkel <m...@newclarity.net> wrote:
>
> Hi all,
>
> While working on a parser, I've repeatedly encountered patterns like:
>
> if c == ' ' || c == '\t' { /* handle whitespace */ }
> if token == EOL || token == EOF { /* handle end markers */ }
> if lexer.Type == TextLine || lexer.Type == WhitespaceLine { /* handle lines
> */ }
>
> Go already allows multiple values in case statements:
>
> switch c {
> case ' ', '\t':
> /* handle whitespace */
> }
>
> I'm wondering if there could be a more elegant way to express this pattern in
> Go, perhaps something conceptually similar to:
>
> if c [some_syntax] ' ', '\t' { /* handle whitespace */ }
>
> Do you think that the Go team would be likely to consider such a proposal, or
> would taking the time to prepare and submit a proposal likely just be for
> naught?
>
> If this seems worthy of a proposal, what syntax do you think might be the
> best fit for the Go language?
>
> Thanks,
>
> -Mike
>
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