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9 changes: 6 additions & 3 deletions src/librustc_middle/mir/mod.rs
Original file line number Diff line number Diff line change
Expand Up @@ -857,9 +857,12 @@ pub struct LocalDecl<'tcx> {
#[cfg(target_arch = "x86_64")]
static_assert_size!(LocalDecl<'_>, 56);

/// Extra information about a some locals that's used for diagnostics. (Not
/// used for non-StaticRef temporaries, the return place, or anonymous function
/// parameters.)
/// Extra information about a some locals that's used for diagnostics and for
/// classifying variables into local variables, statics, etc, which is needed e.g.
/// for unsafety checking.
///
/// Not used for non-StaticRef temporaries, the return place, or anonymous
/// function parameters.
#[derive(Clone, Debug, RustcEncodable, RustcDecodable, HashStable, TypeFoldable)]
pub enum LocalInfo<'tcx> {
/// A user-defined local variable or function parameter
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