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| author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-17 12:11:38 +0000 |
|---|---|---|
| committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-17 12:12:43 +0000 |
| commit | cf94bdc0742c13e2a0cac864c478b8626b266e1b (patch) | |
| tree | 044670aa50cc5e2b4229aa0b6b3df6676730c0a6 /compiler/rustc_typeck/src/variance/xform.rs | |
| parent | Adding debian version 1.65.0+dfsg1-2. (diff) | |
| download | rustc-cf94bdc0742c13e2a0cac864c478b8626b266e1b.tar.xz rustc-cf94bdc0742c13e2a0cac864c478b8626b266e1b.zip | |
Merging upstream version 1.66.0+dfsg1.
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'compiler/rustc_typeck/src/variance/xform.rs')
| -rw-r--r-- | compiler/rustc_typeck/src/variance/xform.rs | 22 |
1 files changed, 0 insertions, 22 deletions
diff --git a/compiler/rustc_typeck/src/variance/xform.rs b/compiler/rustc_typeck/src/variance/xform.rs deleted file mode 100644 index 027f0859f..000000000 --- a/compiler/rustc_typeck/src/variance/xform.rs +++ /dev/null @@ -1,22 +0,0 @@ -use rustc_middle::ty; - -pub fn glb(v1: ty::Variance, v2: ty::Variance) -> ty::Variance { - // Greatest lower bound of the variance lattice as - // defined in The Paper: - // - // * - // - + - // o - match (v1, v2) { - (ty::Invariant, _) | (_, ty::Invariant) => ty::Invariant, - - (ty::Covariant, ty::Contravariant) => ty::Invariant, - (ty::Contravariant, ty::Covariant) => ty::Invariant, - - (ty::Covariant, ty::Covariant) => ty::Covariant, - - (ty::Contravariant, ty::Contravariant) => ty::Contravariant, - - (x, ty::Bivariant) | (ty::Bivariant, x) => x, - } -} |