pub fn find_const_stability(
sess: &Session,
attrs: &[Attribute],
item_sp: Span,
is_const_fn: bool,
) -> Option<(ConstStability, Span)>Expand description
Collects stability info from rustc_const_stable/rustc_const_unstable/rustc_promotable
attributes in attrs. Returns None if no stability attributes are found.
is_const_fn indicates whether this is a function marked as const. It will always
be false for intrinsics in an extern block!