bjoernager/rust
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Auto merge of #87114 - cjgillot:abilint, r=estebank

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Lint missing Abi in ast validation instead of lowering.
This commit is contained in:
bors 2021-09-02 06:06:24 +00:00
commit b27ccbc7e1
6 changed files with 61 additions and 50 deletions
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37
compiler/rustc_ast_lowering/src/item.rs
View file

@ -279,7 +279,7 @@ impl<'hir> LoweringContext<'_, 'hir> {
);
let sig = hir::FnSig {
decl,
header: this.lower_fn_header(header, fn_sig_span, id),
header: this.lower_fn_header(header),
span: this.lower_span(fn_sig_span),
};
hir::ItemKind::Fn(sig, generics, body_id)
@ -291,17 +291,12 @@ impl<'hir> LoweringContext<'_, 'hir> {
}
ModKind::Unloaded => panic!("`mod` items should have been loaded by now"),
},
ItemKind::ForeignMod(ref fm) => {
if fm.abi.is_none() {
self.maybe_lint_missing_abi(span, id, abi::Abi::C { unwind: false });
}
hir::ItemKind::ForeignMod {
abi: fm.abi.map_or(abi::Abi::C { unwind: false }, |abi| self.lower_abi(abi)),
items: self
.arena
.alloc_from_iter(fm.items.iter().map(|x| self.lower_foreign_item_ref(x))),
}
}
ItemKind::ForeignMod(ref fm) => hir::ItemKind::ForeignMod {
abi: fm.abi.map_or(abi::Abi::FALLBACK, |abi| self.lower_abi(abi)),
items: self
.arena
.alloc_from_iter(fm.items.iter().map(|x| self.lower_foreign_item_ref(x))),
},
ItemKind::GlobalAsm(ref asm) => {
hir::ItemKind::GlobalAsm(self.lower_inline_asm(span, asm))
}
@ -807,7 +802,7 @@ impl<'hir> LoweringContext<'_, 'hir> {
AssocItemKind::Fn(box FnKind(_, ref sig, ref generics, None)) => {
let names = self.lower_fn_params_to_names(&sig.decl);
let (generics, sig) =
self.lower_method_sig(generics, sig, trait_item_def_id, false, None, i.id);
self.lower_method_sig(generics, sig, trait_item_def_id, false, None);
(generics, hir::TraitItemKind::Fn(sig, hir::TraitFn::Required(names)))
}
AssocItemKind::Fn(box FnKind(_, ref sig, ref generics, Some(ref body))) => {
@ -820,7 +815,6 @@ impl<'hir> LoweringContext<'_, 'hir> {
trait_item_def_id,
false,
asyncness.opt_return_id(),
i.id,
);
(generics, hir::TraitItemKind::Fn(sig, hir::TraitFn::Provided(body_id)))
}
@ -897,7 +891,6 @@ impl<'hir> LoweringContext<'_, 'hir> {
impl_item_def_id,
impl_trait_return_allow,
asyncness.opt_return_id(),
i.id,
);
(generics, hir::ImplItemKind::Fn(sig, body_id))
@ -1292,9 +1285,8 @@ impl<'hir> LoweringContext<'_, 'hir> {
fn_def_id: LocalDefId,
impl_trait_return_allow: bool,
is_async: Option<NodeId>,
id: NodeId,
) -> (hir::Generics<'hir>, hir::FnSig<'hir>) {
let header = self.lower_fn_header(sig.header, sig.span, id);
let header = self.lower_fn_header(sig.header);
let (generics, decl) = self.add_in_band_defs(
generics,
fn_def_id,
@ -1311,12 +1303,12 @@ impl<'hir> LoweringContext<'_, 'hir> {
(generics, hir::FnSig { header, decl, span: self.lower_span(sig.span) })
}
fn lower_fn_header(&mut self, h: FnHeader, span: Span, id: NodeId) -> hir::FnHeader {
fn lower_fn_header(&mut self, h: FnHeader) -> hir::FnHeader {
hir::FnHeader {
unsafety: self.lower_unsafety(h.unsafety),
asyncness: self.lower_asyncness(h.asyncness),
constness: self.lower_constness(h.constness),
abi: self.lower_extern(h.ext, span, id),
abi: self.lower_extern(h.ext),
}
}
@ -1327,13 +1319,10 @@ impl<'hir> LoweringContext<'_, 'hir> {
})
}
pub(super) fn lower_extern(&mut self, ext: Extern, span: Span, id: NodeId) -> abi::Abi {
pub(super) fn lower_extern(&mut self, ext: Extern) -> abi::Abi {
match ext {
Extern::None => abi::Abi::Rust,
Extern::Implicit => {
self.maybe_lint_missing_abi(span, id, abi::Abi::C { unwind: false });
abi::Abi::C { unwind: false }
}
Extern::Implicit => abi::Abi::FALLBACK,
Extern::Explicit(abi) => self.lower_abi(abi),
}
}

26
compiler/rustc_ast_lowering/src/lib.rs
View file

@ -53,7 +53,7 @@ use rustc_hir::definitions::{DefKey, DefPathData, Definitions};
use rustc_hir::intravisit;
use rustc_hir::{ConstArg, GenericArg, InferKind, ParamName};
use rustc_index::vec::{Idx, IndexVec};
use rustc_session::lint::builtin::{BARE_TRAIT_OBJECTS, MISSING_ABI};
use rustc_session::lint::builtin::BARE_TRAIT_OBJECTS;
use rustc_session::lint::{BuiltinLintDiagnostics, LintBuffer};
use rustc_session::utils::{FlattenNonterminals, NtToTokenstream};
use rustc_session::Session;
@ -62,7 +62,6 @@ use rustc_span::hygiene::ExpnId;
use rustc_span::source_map::{respan, CachingSourceMapView, DesugaringKind};
use rustc_span::symbol::{kw, sym, Ident, Symbol};
use rustc_span::{Span, DUMMY_SP};
use rustc_target::spec::abi::Abi;
use smallvec::SmallVec;
use std::collections::BTreeMap;
@ -1361,7 +1360,6 @@ impl<'a, 'hir> LoweringContext<'a, 'hir> {
}
TyKind::BareFn(ref f) => self.with_in_scope_lifetime_defs(&f.generic_params, |this| {
this.with_anonymous_lifetime_mode(AnonymousLifetimeMode::PassThrough, |this| {
let span = this.sess.source_map().next_point(t.span.shrink_to_lo());
hir::TyKind::BareFn(this.arena.alloc(hir::BareFnTy {
generic_params: this.lower_generic_params(
&f.generic_params,
@ -1369,7 +1367,7 @@ impl<'a, 'hir> LoweringContext<'a, 'hir> {
ImplTraitContext::disallowed(),
),
unsafety: this.lower_unsafety(f.unsafety),
abi: this.lower_extern(f.ext, span, t.id),
abi: this.lower_extern(f.ext),
decl: this.lower_fn_decl(&f.decl, None, false, None),
param_names: this.lower_fn_params_to_names(&f.decl),
}))
@ -2749,26 +2747,6 @@ impl<'a, 'hir> LoweringContext<'a, 'hir> {
}
}
}
fn maybe_lint_missing_abi(&mut self, span: Span, id: NodeId, default: Abi) {
// FIXME(davidtwco): This is a hack to detect macros which produce spans of the
// call site which do not have a macro backtrace. See #61963.
let is_macro_callsite = self
.sess
.source_map()
.span_to_snippet(span)
.map(|snippet| snippet.starts_with("#["))
.unwrap_or(true);
if !is_macro_callsite {
self.resolver.lint_buffer().buffer_lint_with_diagnostic(
MISSING_ABI,
id,
span,
"extern declarations without an explicit ABI are deprecated",
BuiltinLintDiagnostics::MissingAbi(span, default),
)
}
}
}
fn body_ids(bodies: &BTreeMap<hir::BodyId, hir::Body<'_>>) -> Vec<hir::BodyId> {