Consider some form of limited infix for boolean logic

[calebzulawski]

I think allowing arbitrary infix function calls is probably wrong, but would be appropriate for some built in operations.

For example:

match std:env:os [
    linux -> $linux-value
    _ -> $otherwise
]

vs

if (std:env:os == linux) $linux-value else $otherwise

(yes, std:equal exists, but that somehow feels even less idiomatic than match)