bjoernager/rust
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Auto merge of #118605 - fee1-dead-contrib:rm-rustc_host, r=compiler-errors

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Remove `#[rustc_host]`, use internal desugaring

Also removed a way for users to explicitly specify the host param since that isn't particularly useful. This should eliminate any pain with encoding attributes across crates and etc.

r? `@compiler-errors`
This commit is contained in:
bors 2023-12-06 16:00:24 +00:00
commit f32d29837d
16 changed files with 56 additions and 88 deletions
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2
compiler/rustc_hir_analysis/src/check/wfcheck.rs
View file

@ -859,7 +859,7 @@ fn check_param_wf(tcx: TyCtxt<'_>, param: &hir::GenericParam<'_>) -> Result<(),
hir::GenericParamKind::Lifetime { .. } | hir::GenericParamKind::Type { .. } => Ok(()),
// Const parameters are well formed if their type is structural match.
hir::GenericParamKind::Const { ty: hir_ty, default: _ } => {
hir::GenericParamKind::Const { ty: hir_ty, default: _, is_host_effect: _ } => {
let ty = tcx.type_of(param.def_id).instantiate_identity();
if tcx.features().adt_const_params {

2
compiler/rustc_hir_analysis/src/collect.rs
View file

@ -1383,7 +1383,7 @@ fn impl_trait_ref(
let last_segment = path_segments.len() - 1;
let mut args = *path_segments[last_segment].args();
let last_arg = args.args.len() - 1;
assert!(matches!(args.args[last_arg], hir::GenericArg::Const(anon_const) if tcx.has_attr(anon_const.value.def_id, sym::rustc_host)));
assert!(matches!(args.args[last_arg], hir::GenericArg::Const(anon_const) if anon_const.is_desugared_from_effects));
args.args = &args.args[..args.args.len() - 1];
path_segments[last_segment].args = Some(&args);
let path = hir::Path {

16
compiler/rustc_hir_analysis/src/collect/generics_of.rs
View file

@ -9,7 +9,7 @@ use rustc_hir::def_id::LocalDefId;
use rustc_middle::ty::{self, TyCtxt};
use rustc_session::lint;
use rustc_span::symbol::{kw, Symbol};
use rustc_span::{sym, Span};
use rustc_span::Span;
pub(super) fn generics_of(tcx: TyCtxt<'_>, def_id: LocalDefId) -> ty::Generics {
use rustc_hir::*;
@ -298,13 +298,11 @@ pub(super) fn generics_of(tcx: TyCtxt<'_>, def_id: LocalDefId) -> ty::Generics {
kind,
})
}
GenericParamKind::Const { default, .. } => {
let is_host_param = tcx.has_attr(param.def_id, sym::rustc_host);
GenericParamKind::Const { ty: _, default, is_host_effect } => {
if !matches!(allow_defaults, Defaults::Allowed)
&& default.is_some()
// `rustc_host` effect params are allowed to have defaults.
&& !is_host_param
// `host` effect params are allowed to have defaults.
&& !is_host_effect
{
tcx.sess.span_err(
param.span,
@ -315,7 +313,7 @@ pub(super) fn generics_of(tcx: TyCtxt<'_>, def_id: LocalDefId) -> ty::Generics {
let index = next_index();
if is_host_param {
if is_host_effect {
if let Some(idx) = host_effect_index {
bug!("parent also has host effect param? index: {idx}, def: {def_id:?}");
}
@ -330,7 +328,7 @@ pub(super) fn generics_of(tcx: TyCtxt<'_>, def_id: LocalDefId) -> ty::Generics {
pure_wrt_drop: param.pure_wrt_drop,
kind: ty::GenericParamDefKind::Const {
has_default: default.is_some(),
is_host_effect: is_host_param,
is_host_effect,
},
})
}
@ -489,7 +487,7 @@ struct AnonConstInParamTyDetector {
impl<'v> Visitor<'v> for AnonConstInParamTyDetector {
fn visit_generic_param(&mut self, p: &'v hir::GenericParam<'v>) {
if let GenericParamKind::Const { ty, default: _ } = p.kind {
if let GenericParamKind::Const { ty, default: _, is_host_effect: _ } = p.kind {
let prev = self.in_param_ty;
self.in_param_ty = true;
self.visit_ty(ty);

2
compiler/rustc_hir_analysis/src/collect/resolve_bound_vars.rs
View file

@ -992,7 +992,7 @@ impl<'a, 'tcx> Visitor<'tcx> for BoundVarContext<'a, 'tcx> {
self.visit_ty(ty);
}
}
GenericParamKind::Const { ty, default } => {
GenericParamKind::Const { ty, default, is_host_effect: _ } => {
self.visit_ty(ty);
if let Some(default) = default {
self.visit_body(self.tcx.hir().body(default.body));