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some additional refactor

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also, treat placeholders equal to params
This commit is contained in:
lcnr 2023-07-18 15:50:34 +02:00
parent 8a0802089c
commit d1b4b458c0
2 changed files with 12 additions and 12 deletions
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18
compiler/rustc_middle/src/ty/util.rs
View File

@ -19,7 +19,7 @@
use rustc_macros::HashStable;
use rustc_session::Limit;
use rustc_span::sym;
use rustc_target::abi::{Integer, IntegerType, Size, TargetDataLayout};
use rustc_target::abi::{Integer, IntegerType, Size};
use rustc_target::spec::abi::Abi;
use smallvec::SmallVec;
use std::{fmt, iter};
@ -1085,7 +1085,7 @@ fn is_trivially_unpin(self) -> bool {
#[inline]
pub fn needs_drop(self, tcx: TyCtxt<'tcx>, param_env: ty::ParamEnv<'tcx>) -> bool {
// Avoid querying in simple cases.
match needs_drop_components(self, &tcx.data_layout) {
match needs_drop_components(tcx, self) {
Err(AlwaysRequiresDrop) => true,
Ok(components) => {
let query_ty = match *components {
@ -1118,7 +1118,7 @@ pub fn needs_drop(self, tcx: TyCtxt<'tcx>, param_env: ty::ParamEnv<'tcx>) -> boo
#[inline]
pub fn has_significant_drop(self, tcx: TyCtxt<'tcx>, param_env: ty::ParamEnv<'tcx>) -> bool {
// Avoid querying in simple cases.
match needs_drop_components(self, &tcx.data_layout) {
match needs_drop_components(tcx, self) {
Err(AlwaysRequiresDrop) => true,
Ok(components) => {
let query_ty = match *components {
@ -1278,10 +1278,10 @@ pub fn determine<P>(self_arg_ty: Ty<'tcx>, is_self_ty: P) -> ExplicitSelf<'tcx>
/// *any* of the returned types need drop. Returns `Err(AlwaysRequiresDrop)` if
/// this type always needs drop.
pub fn needs_drop_components<'tcx>(
tcx: TyCtxt<'tcx>,
ty: Ty<'tcx>,
target_layout: &TargetDataLayout,
) -> Result<SmallVec<[Ty<'tcx>; 2]>, AlwaysRequiresDrop> {
match ty.kind() {
match *ty.kind() {
ty::Infer(ty::FreshIntTy(_))
| ty::Infer(ty::FreshFloatTy(_))
| ty::Bool
@ -1303,11 +1303,11 @@ pub fn needs_drop_components<'tcx>(
ty::Dynamic(..) | ty::Error(_) => Err(AlwaysRequiresDrop),
ty::Slice(ty) => needs_drop_components(*ty, target_layout),
ty::Slice(ty) => needs_drop_components(tcx, ty),
ty::Array(elem_ty, size) => {
match needs_drop_components(*elem_ty, target_layout) {
match needs_drop_components(tcx, elem_ty) {
Ok(v) if v.is_empty() => Ok(v),
res => match size.try_to_bits(target_layout.pointer_size) {
res => match size.try_to_target_usize(tcx) {
// Arrays of size zero don't need drop, even if their element
// type does.
Some(0) => Ok(SmallVec::new()),
@ -1321,7 +1321,7 @@ pub fn needs_drop_components<'tcx>(
}
// If any field needs drop, then the whole tuple does.
ty::Tuple(fields) => fields.iter().try_fold(SmallVec::new(), move |mut acc, elem| {
acc.extend(needs_drop_components(elem, target_layout)?);
acc.extend(needs_drop_components(tcx, elem)?);
Ok(acc)
}),

6
compiler/rustc_ty_utils/src/needs_drop.rs
View File

@ -96,7 +96,7 @@ fn next(&mut self) -> Option<NeedsDropResult<Ty<'tcx>>> {
return Some(Err(AlwaysRequiresDrop));
}
let components = match needs_drop_components(ty, &tcx.data_layout) {
let components = match needs_drop_components(tcx, ty) {
Err(e) => return Some(Err(e)),
Ok(components) => components,
};
@ -160,7 +160,7 @@ fn next(&mut self) -> Option<NeedsDropResult<Ty<'tcx>>> {
queue_type(self, required);
}
}
ty::Array(..) | ty::Alias(..) | ty::Param(_) => {
ty::Alias(..) | ty::Array(..) | ty::Placeholder(_) | ty::Param(_) => {
if ty == component {
// Return the type to the caller: they may be able
// to normalize further than we can.
@ -173,7 +173,7 @@ fn next(&mut self) -> Option<NeedsDropResult<Ty<'tcx>>> {
}
}
ty::Foreign(_) | ty::Dynamic(..) | ty::Placeholder(_) => {
ty::Foreign(_) | ty::Dynamic(..) => {
return Some(Err(AlwaysRequiresDrop));
}