add macros for "safely" generating fixed-size "all supported languages" collections
a couple ergonomic improvements related to these per comments on #52
To test:
You should see the fixed_map!() macro fail if you try to omit any keys, pass any spurious key/values or not pass corresponding values of the expected type
You should see the by_supported_language!() macro fail if you omit any supported languages or pass any unknown keys
In this PR:
To test: You should see the
fixed_map!()macro fail if you try to omit any keys, pass any spurious key/values or not pass corresponding values of the expected type You should see theby_supported_language!()macro fail if you omit any supported languages or pass any unknown keysBased on
supported-languages-fixed-size