forked from lix-project/lix
Undeprecate isNull
There's no good reason to deprecate it: - For consistency reasons it should continue to exist, such that all primitive types have a corresponding `builtins.is*` primop. - There's no implementation cost to continuing to have this function - It costs users time to try to migrate away from it, e.g. https://github.com/NixOS/nixpkgs/pull/219747 and https://github.com/NixOS/nixpkgs/pull/275548 - Using it can give easier-to-read code like `all isNull list` Co-authored-by: Robert Hensing <roberth@users.noreply.github.com>
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@ -438,9 +438,7 @@ static RegisterPrimOp primop_isNull({
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.doc = R"(
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Return `true` if *e* evaluates to `null`, and `false` otherwise.
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> **Warning**
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>
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> This function is *deprecated*; just write `e == null` instead.
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This is equivalent to `e == null`.
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)",
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.fun = prim_isNull,
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});
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