Use proc_macro::is_available() on rust 1.57+ #300
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This avoids the need for catching a panic, which is incompatible with projects using panic=abort or cg_clif.
dtolnay
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Oct 12, 2021
bjorn3
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Dec 2, 2021
In dtolnay#300 I made a mistake with the #[cfg] causing proc_macro::is_available() to never actually be used. I have now double checked that it is actually used on Rust 1.57+.
This was referenced Dec 2, 2021
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This avoids the need for catching a panic, which is incompatible with projects using panic=abort or cg_clif.
proc_macro::is_available()has been stabilized in rust-lang/rust#89735, which landed yesterday.