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Add additional examples and clarifications for syntax rules

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Ryan Burns 2022-11-06 15:44:00 -08:00
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rfcs/0110-inherit-as-list.md
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@ -94,6 +94,20 @@ meta.licenses = lib.licenses.[ bsd3 mit ];
meta.maintainers = lib.maintainers.[ johndoe janedoe ];
```
Note that only simple textual attrnames are allowed in the square brackets.
For example, `pkgs.[ (openssl.overrideAttrs { patches = [ ... ]; }) ]`
is currently a syntax error, as is `pkgs.[ "${some_expression}" ]`,
`a.[ b.[ c d ] ]`, and `a.[ [ b c ] [ d e ] ]`.
Future RFCs may add additional support for useful idioms such as
`pkgs.[ python310 python310Packages.pytorch ]` on a case-by-case basis,
but that is not planned for this RFC.
Other forms of syntax which were considered but are not proposed
in this RFC include:
* `[ inherit (attrs) a b c; ]`
* `[ inherit a b c; ]`
* `inherit (attrs) [ a b c ]`
* `pkgs.{ python = python310; openssl = openssl_3; }`
# Drawbacks
[drawbacks]: #drawbacks