Revise the contents of Cargo.toml

[eitsupi]

Looking at rust-polars and python-polars, the features that require the nightly toolchain are named nightly.

https://github.com/pola-rs/polars/blob/126aef55c4909021176aad2cbb190f5a8daf731c/py-polars/Cargo.toml#L48
https://github.com/pola-rs/polars/blob/126aef55c4909021176aad2cbb190f5a8daf731c/polars/Cargo.toml#L17

Since we are now directly controlling the enabling and disabling of the simd feature here, it would be better to rewrite it to use nightly feature for consistency.

[etiennebacher]

@eitsupi is this still an issue?

[eitsupi]

Yes, I still want to work on this. I mean, we currently use a feature named full_features, which is realistically "nightly".

r-polars/src/rust/Cargo.toml

Lines 11 to 16 in 2472c24

	[features]
	default = []
	full_features = ["simd", "sql"]
	simd = ["polars/simd"]
	sql = ["polars/sql"]
	rpolars_debug_print = []

I would like to keep full_features as a means to adjust MSRV for CRAN submissions and create nightly under it.
(For example, as of 0.10.0, it seems that it is polars/lazy that raises the MSRV from 1.71 to 1.73, so a possible response would be to add polars/lazy to full_features)

[features]
default = []                        # MSRV is 1.71
full_features = ["nightly", "lazy"] # Needs nightly toolchain
lazy = ["polars/lazy"]              # MSRV is 1.73
nightly = ["simd", "sql"]           # Needs nightly toolchain
simd = ["polars/simd"]              # Needs nightly toolchain
sql = ["polars/sql"]                # Needs nightly toolchain

(Of course, realistically this is not done because too much depends on polars/lazy. This is just an example.)