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ty::layout: implement layout_of automatically as a default method.

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This commit is contained in:
Eduard-Mihai Burtescu 2021-08-30 18:01:58 +03:00
parent 4ce933f13f
commit 1e02262dcc
8 changed files with 105 additions and 54 deletions
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12
compiler/rustc_passes/src/layout_test.rs
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@ -3,9 +3,10 @@ use rustc_hir as hir;
use rustc_hir::def_id::LocalDefId;
use rustc_hir::itemlikevisit::ItemLikeVisitor;
use rustc_hir::ItemKind;
use rustc_middle::ty::layout::{HasParamEnv, HasTyCtxt, LayoutOf, TyAndLayout};
use rustc_middle::ty::layout::{HasParamEnv, HasTyCtxt, LayoutError, LayoutOf, TyAndLayout};
use rustc_middle::ty::{ParamEnv, Ty, TyCtxt};
use rustc_span::symbol::sym;
use rustc_span::Span;
use rustc_target::abi::{HasDataLayout, TargetDataLayout};
pub fn test_layout(tcx: TyCtxt<'_>) {
@ -116,8 +117,13 @@ struct UnwrapLayoutCx<'tcx> {
impl LayoutOf<'tcx> for UnwrapLayoutCx<'tcx> {
type LayoutOfResult = TyAndLayout<'tcx>;
fn layout_of(&self, ty: Ty<'tcx>) -> Self::LayoutOfResult {
self.tcx.layout_of(self.param_env.and(ty)).unwrap()
fn handle_layout_err(&self, err: LayoutError<'tcx>, span: Span, ty: Ty<'tcx>) -> ! {
span_bug!(
span,
"`#[rustc_layout(..)]` test resulted in `layout_of({}) = Err({})`",
ty,
err
);
}
}