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Fix clippy's usage of Body's coroutine_kind

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Also fixes a bug where we weren't peeling blocks from async bodies
This commit is contained in:
Michael Goulet 2023-12-25 18:01:56 +00:00
parent 870a5d957b
commit e0097f5323
14 changed files with 119 additions and 73 deletions
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23
clippy_lints/src/async_yields_async.rs
View File

@ -2,7 +2,9 @@
use clippy_utils::source::snippet;
use clippy_utils::ty::implements_trait;
use rustc_errors::Applicability;
use rustc_hir::{Body, BodyId, CoroutineKind, CoroutineSource, CoroutineDesugaring, ExprKind, QPath};
use rustc_hir::{
Closure, ClosureKind, CoroutineDesugaring, CoroutineKind, CoroutineSource, Expr, ExprKind, QPath,
};
use rustc_lint::{LateContext, LateLintPass};
use rustc_session::declare_lint_pass;
@ -44,15 +46,22 @@
declare_lint_pass!(AsyncYieldsAsync => [ASYNC_YIELDS_ASYNC]);
impl<'tcx> LateLintPass<'tcx> for AsyncYieldsAsync {
fn check_body(&mut self, cx: &LateContext<'tcx>, body: &'tcx Body<'_>) {
fn check_expr(&mut self, cx: &LateContext<'tcx>, expr: &'tcx Expr<'tcx>) {
// For functions, with explicitly defined types, don't warn.
// XXXkhuey maybe we should?
if let Some(CoroutineKind::Desugared(CoroutineDesugaring::Async, CoroutineSource::Block | CoroutineSource::Closure)) = body.coroutine_kind {
if let ExprKind::Closure(Closure {
kind:
ClosureKind::Coroutine(CoroutineKind::Desugared(
CoroutineDesugaring::Async,
CoroutineSource::Block | CoroutineSource::Closure,
)),
body: body_id,
..
}) = expr.kind
{
if let Some(future_trait_def_id) = cx.tcx.lang_items().future_trait() {
let body_id = BodyId {
hir_id: body.value.hir_id,
};
let typeck_results = cx.tcx.typeck_body(body_id);
let typeck_results = cx.tcx.typeck_body(*body_id);
let body = cx.tcx.hir().body(*body_id);
let expr_ty = typeck_results.expr_ty(body.value);
if implements_trait(cx, expr_ty, future_trait_def_id, &[]) {

18
clippy_lints/src/await_holding_invalid.rs
View File

@ -2,8 +2,8 @@
use clippy_utils::diagnostics::span_lint_and_then;
use clippy_utils::{match_def_path, paths};
use rustc_data_structures::fx::FxHashMap;
use rustc_hir as hir;
use rustc_hir::def_id::DefId;
use rustc_hir::{Body, CoroutineKind, CoroutineDesugaring};
use rustc_lint::{LateContext, LateLintPass};
use rustc_middle::mir::CoroutineLayout;
use rustc_session::impl_lint_pass;
@ -183,8 +183,8 @@ pub(crate) fn new(conf_invalid_types: Vec<DisallowedPath>) -> Self {
}
}
impl LateLintPass<'_> for AwaitHolding {
fn check_crate(&mut self, cx: &LateContext<'_>) {
impl<'tcx> LateLintPass<'tcx> for AwaitHolding {
fn check_crate(&mut self, cx: &LateContext<'tcx>) {
for conf in &self.conf_invalid_types {
let segs: Vec<_> = conf.path().split("::").collect();
for id in clippy_utils::def_path_def_ids(cx, &segs) {
@ -193,10 +193,14 @@ fn check_crate(&mut self, cx: &LateContext<'_>) {
}
}
fn check_body(&mut self, cx: &LateContext<'_>, body: &'_ Body<'_>) {
if let Some(CoroutineKind::Desugared(CoroutineDesugaring::Async, _)) = body.coroutine_kind {
let def_id = cx.tcx.hir().body_owner_def_id(body.id());
if let Some(coroutine_layout) = cx.tcx.mir_coroutine_witnesses(def_id) {
fn check_expr(&mut self, cx: &LateContext<'tcx>, expr: &'tcx hir::Expr<'tcx>) {
if let hir::ExprKind::Closure(hir::Closure {
kind: hir::ClosureKind::Coroutine(hir::CoroutineKind::Desugared(hir::CoroutineDesugaring::Async, _)),
def_id,
..
}) = expr.kind
{
if let Some(coroutine_layout) = cx.tcx.mir_coroutine_witnesses(*def_id) {
self.check_interior_types(cx, coroutine_layout);
}
}

32
clippy_lints/src/manual_async_fn.rs
View File

@ -3,8 +3,9 @@
use rustc_errors::Applicability;
use rustc_hir::intravisit::FnKind;
use rustc_hir::{
Block, Body, Closure, CoroutineKind, CoroutineSource, CoroutineDesugaring, Expr, ExprKind, FnDecl, FnRetTy, GenericArg, GenericBound,
ImplItem, Item, ItemKind, LifetimeName, Node, Term, TraitRef, Ty, TyKind, TypeBindingKind,
Block, Body, Closure, CoroutineDesugaring, CoroutineKind, CoroutineSource, Expr, ExprKind, FnDecl, FnRetTy,
GenericArg, GenericBound, ImplItem, Item, ItemKind, LifetimeName, Node, Term, TraitRef, Ty, TyKind,
TypeBindingKind, ClosureKind,
};
use rustc_lint::{LateContext, LateLintPass};
use rustc_session::declare_lint_pass;
@ -171,16 +172,25 @@ fn captures_all_lifetimes(inputs: &[Ty<'_>], output_lifetimes: &[LifetimeName])
.all(|in_lt| output_lifetimes.iter().any(|out_lt| in_lt == out_lt))
}
fn desugared_async_block<'tcx>(cx: &LateContext<'tcx>, block: &'tcx Block<'tcx>) -> Option<&'tcx Body<'tcx>> {
if let Some(block_expr) = block.expr
&& let Expr {
kind: ExprKind::Closure(&Closure { body, .. }),
..
} = block_expr
&& let closure_body = cx.tcx.hir().body(body)
&& closure_body.coroutine_kind == Some(CoroutineKind::Desugared(CoroutineDesugaring::Async, CoroutineSource::Block))
fn desugared_async_block<'tcx>(
cx: &LateContext<'tcx>,
block: &'tcx Block<'tcx>,
) -> Option<&'tcx Body<'tcx>> {
if let Some(Expr {
kind:
ExprKind::Closure(&Closure {
kind:
ClosureKind::Coroutine(CoroutineKind::Desugared(
CoroutineDesugaring::Async,
CoroutineSource::Block,
)),
body,
..
}),
..
}) = block.expr
{
return Some(closure_body);
return Some(cx.tcx.hir().body(body));
}
None

1
clippy_lints/src/methods/iter_kv_map.rs
View File

@ -32,7 +32,6 @@ pub(super) fn check<'tcx>(
&& let Body {
params: [p],
value: body_expr,
coroutine_kind: _,
} = cx.tcx.hir().body(c.body)
&& let PatKind::Tuple([key_pat, val_pat], _) = p.pat.kind
&& let (replacement_kind, annotation, bound_ident) = match (&key_pat.kind, &val_pat.kind) {

32
clippy_lints/src/needless_question_mark.rs
View File

@ -3,7 +3,7 @@
use clippy_utils::source::snippet;
use rustc_errors::Applicability;
use rustc_hir::def::{DefKind, Res};
use rustc_hir::{Block, Body, CoroutineKind, CoroutineSource, CoroutineDesugaring, Expr, ExprKind, LangItem, MatchSource, QPath};
use rustc_hir::{Block, Body, Expr, ExprKind, LangItem, MatchSource, QPath};
use rustc_lint::{LateContext, LateLintPass};
use rustc_session::declare_lint_pass;
@ -86,22 +86,20 @@ fn check_expr(&mut self, cx: &LateContext<'_>, expr: &'_ Expr<'_>) {
}
fn check_body(&mut self, cx: &LateContext<'_>, body: &'_ Body<'_>) {
if let Some(CoroutineKind::Desugared(CoroutineDesugaring::Async, CoroutineSource::Fn)) = body.coroutine_kind {
if let ExprKind::Block(
Block {
expr:
Some(Expr {
kind: ExprKind::DropTemps(async_body),
..
}),
..
},
_,
) = body.value.kind
{
if let ExprKind::Block(Block { expr: Some(expr), .. }, ..) = async_body.kind {
check(cx, expr);
}
if let ExprKind::Block(
Block {
expr:
Some(Expr {
kind: ExprKind::DropTemps(async_body),
..
}),
..
},
_,
) = body.value.kind
{
if let ExprKind::Block(Block { expr: Some(expr), .. }, ..) = async_body.kind {
check(cx, expr.peel_blocks());
}
} else {
check(cx, body.value.peel_blocks());

6
clippy_lints/src/redundant_async_block.rs
View File

@ -5,7 +5,7 @@
use clippy_utils::source::{snippet, walk_span_to_context};
use clippy_utils::visitors::for_each_expr;
use rustc_errors::Applicability;
use rustc_hir::{Closure, CoroutineKind, CoroutineSource, CoroutineDesugaring, Expr, ExprKind, MatchSource};
use rustc_hir::{Closure, ClosureKind, CoroutineKind, CoroutineSource, CoroutineDesugaring, Expr, ExprKind, MatchSource};
use rustc_lint::{LateContext, LateLintPass};
use rustc_middle::lint::in_external_macro;
use rustc_middle::ty::UpvarCapture;
@ -69,9 +69,9 @@ fn check_expr(&mut self, cx: &LateContext<'tcx>, expr: &'tcx Expr<'_>) {
/// If `expr` is a desugared `async` block, return the original expression if it does not capture
/// any variable by ref.
fn desugar_async_block<'tcx>(cx: &LateContext<'tcx>, expr: &'tcx Expr<'_>) -> Option<&'tcx Expr<'tcx>> {
if let ExprKind::Closure(Closure { body, def_id, .. }) = expr.kind
if let ExprKind::Closure(Closure { body, def_id, kind, .. }) = expr.kind
&& let body = cx.tcx.hir().body(*body)
&& matches!(body.coroutine_kind, Some(CoroutineKind::Desugared(CoroutineDesugaring::Async, CoroutineSource::Block)))
&& matches!(kind, ClosureKind::Coroutine(CoroutineKind::Desugared(CoroutineDesugaring::Async, CoroutineSource::Block)))
{
cx.typeck_results()
.closure_min_captures

9
clippy_lints/src/redundant_closure_call.rs
View File

@ -5,7 +5,7 @@
use rustc_errors::Applicability;
use rustc_hir as hir;
use rustc_hir::intravisit::{Visitor as HirVisitor, Visitor};
use rustc_hir::{intravisit as hir_visit, CoroutineKind, CoroutineSource, CoroutineDesugaring, Node};
use rustc_hir::{intravisit as hir_visit, CoroutineKind, CoroutineSource, CoroutineDesugaring, Node, ClosureKind};
use rustc_lint::{LateContext, LateLintPass};
use rustc_middle::hir::nested_filter;
use rustc_middle::lint::in_external_macro;
@ -63,11 +63,10 @@ fn visit_expr(&mut self, ex: &'tcx hir::Expr<'tcx>) {
/// Checks if the body is owned by an async closure.
/// Returns true for `async || whatever_expression`, but false for `|| async { whatever_expression
/// }`.
fn is_async_closure(cx: &LateContext<'_>, body: &hir::Body<'_>) -> bool {
fn is_async_closure(body: &hir::Body<'_>) -> bool {
if let hir::ExprKind::Closure(innermost_closure_generated_by_desugar) = body.value.kind
&& let desugared_inner_closure_body = cx.tcx.hir().body(innermost_closure_generated_by_desugar.body)
// checks whether it is `async || whatever_expression`
&& let Some(CoroutineKind::Desugared(CoroutineDesugaring::Async, CoroutineSource::Closure)) = desugared_inner_closure_body.coroutine_kind
&& let ClosureKind::Coroutine(CoroutineKind::Desugared(CoroutineDesugaring::Async, CoroutineSource::Closure)) = innermost_closure_generated_by_desugar.kind
{
true
} else {
@ -103,7 +102,7 @@ fn find_innermost_closure<'tcx>(
data = Some((
body.value,
closure.fn_decl,
if is_async_closure(cx, body) {
if is_async_closure(body) {
ty::Asyncness::Yes
} else {
ty::Asyncness::No

28
clippy_lints/src/unused_async.rs
View File

@ -1,7 +1,7 @@
use clippy_utils::diagnostics::span_lint_hir_and_then;
use clippy_utils::is_def_id_trait_method;
use rustc_hir::def::DefKind;
use rustc_hir::intravisit::{walk_body, walk_expr, walk_fn, FnKind, Visitor};
use rustc_hir::intravisit::{walk_expr, walk_fn, FnKind, Visitor};
use rustc_hir::{Body, Expr, ExprKind, FnDecl, Node, YieldSource};
use rustc_lint::{LateContext, LateLintPass};
use rustc_middle::hir::nested_filter;
@ -78,32 +78,32 @@ fn visit_expr(&mut self, ex: &'tcx Expr<'tcx>) {
self.await_in_async_block = Some(ex.span);
}
}
walk_expr(self, ex);
}
fn nested_visit_map(&mut self) -> Self::Map {
self.cx.tcx.hir()
}
fn visit_body(&mut self, b: &'tcx Body<'tcx>) {
let is_async_block = matches!(
b.coroutine_kind,
Some(rustc_hir::CoroutineKind::Desugared(
rustc_hir::CoroutineDesugaring::Async,
_
))
ex.kind,
ExprKind::Closure(rustc_hir::Closure {
kind: rustc_hir::ClosureKind::Coroutine(rustc_hir::CoroutineKind::Desugared(
rustc_hir::CoroutineDesugaring::Async,
_
)),
..
})
);
if is_async_block {
self.async_depth += 1;
}
walk_body(self, b);
walk_expr(self, ex);
if is_async_block {
self.async_depth -= 1;
}
}
fn nested_visit_map(&mut self) -> Self::Map {
self.cx.tcx.hir()
}
}
impl<'tcx> LateLintPass<'tcx> for UnusedAsync {

21
clippy_lints/src/utils/author.rs
View File

@ -7,7 +7,8 @@
use rustc_data_structures::fx::FxHashMap;
use rustc_hir as hir;
use rustc_hir::{
ArrayLen, BindingAnnotation, CaptureBy, Closure, ExprKind, FnRetTy, HirId, Lit, PatKind, QPath, StmtKind, TyKind,
ArrayLen, BindingAnnotation, CaptureBy, Closure, ClosureKind, CoroutineKind, ExprKind, FnRetTy, HirId, Lit,
PatKind, QPath, StmtKind, TyKind,
};
use rustc_lint::{LateContext, LateLintPass, LintContext};
use rustc_session::declare_lint_pass;
@ -476,7 +477,7 @@ macro_rules! kind {
capture_clause,
fn_decl,
body: body_id,
movability,
kind,
..
}) => {
let capture_clause = match capture_clause {
@ -484,7 +485,17 @@ macro_rules! kind {
CaptureBy::Ref => "Ref",
};
let movability = OptionPat::new(movability.map(|m| format!("Movability::{m:?}")));
let closure_kind = match kind {
ClosureKind::Closure => "ClosureKind::Closure".to_string(),
ClosureKind::Coroutine(coroutine_kind) => match coroutine_kind {
CoroutineKind::Desugared(desugaring, source) => format!(
"ClosureKind::Coroutine(CoroutineKind::Desugared(CoroutineDesugaring::{desugaring:?}, CoroutineSource::{source:?}))"
),
CoroutineKind::Coroutine(movability) => {
format!("ClosureKind::Coroutine(CoroutineKind::Coroutine(Movability::{movability:?})")
},
},
};
let ret_ty = match fn_decl.output {
FnRetTy::DefaultReturn(_) => "FnRetTy::DefaultReturn(_)",
@ -492,7 +503,9 @@ macro_rules! kind {
};
bind!(self, fn_decl, body_id);
kind!("Closure(CaptureBy::{capture_clause}, {fn_decl}, {body_id}, _, {movability})");
kind!(
"Closure {{ capture_clause: CaptureBy::{capture_clause}, fn_decl: {fn_decl}, body: {body_id}, closure_kind: {closure_kind}, .. }}"
);
chain!(self, "let {ret_ty} = {fn_decl}.output");
self.body(body_id);
},

4
tests/ui/author/blocks.stdout
View File

@ -40,10 +40,10 @@ if let ExprKind::Block(block, None) = expr.kind
{
// report your lint here
}
if let ExprKind::Closure(CaptureBy::Value { .. }, fn_decl, body_id, _, None) = expr.kind
if let ExprKind::Closure { capture_clause: CaptureBy::Value { .. }, fn_decl: fn_decl, body: body_id, closure_kind: ClosureKind::Closure, .. } = expr.kind
&& let FnRetTy::DefaultReturn(_) = fn_decl.output
&& expr1 = &cx.tcx.hir().body(body_id).value
&& let ExprKind::Closure(CaptureBy::Value { .. }, fn_decl1, body_id1, _, Some(Movability::Static)) = expr1.kind
&& let ExprKind::Closure { capture_clause: CaptureBy::Value { .. }, fn_decl: fn_decl1, body: body_id1, closure_kind: ClosureKind::Coroutine(CoroutineKind::Desugared(CoroutineDesugaring::Async, CoroutineSource::Closure)), .. } = expr1.kind
&& let FnRetTy::DefaultReturn(_) = fn_decl1.output
&& expr2 = &cx.tcx.hir().body(body_id1).value
&& let ExprKind::Block(block, None) = expr2.kind

2
tests/ui/author/macro_in_closure.stdout
View File

@ -1,6 +1,6 @@
if let StmtKind::Local(local) = stmt.kind
&& let Some(init) = local.init
&& let ExprKind::Closure(CaptureBy::Ref, fn_decl, body_id, _, None) = init.kind
&& let ExprKind::Closure { capture_clause: CaptureBy::Ref, fn_decl: fn_decl, body: body_id, closure_kind: ClosureKind::Closure, .. } = init.kind
&& let FnRetTy::DefaultReturn(_) = fn_decl.output
&& expr = &cx.tcx.hir().body(body_id).value
&& let ExprKind::Block(block, None) = expr.kind

4
tests/ui/needless_question_mark.fixed
View File

@ -135,3 +135,7 @@ async fn async_deref_ref(s: Option<&String>) -> Option<&str> {
async fn async_result_bad(s: TR) -> Result<usize, bool> {
s.magic
}
async fn async_wrapped<T>(a: Option<T>) -> Option<T> {
{ a }
}

4
tests/ui/needless_question_mark.rs
View File

@ -135,3 +135,7 @@ async fn async_deref_ref(s: Option<&String>) -> Option<&str> {
async fn async_result_bad(s: TR) -> Result<usize, bool> {
Ok(s.magic?)
}
async fn async_wrapped<T>(a: Option<T>) -> Option<T> {
{ Some(a?) }
}

8
tests/ui/needless_question_mark.stderr
View File

@ -90,5 +90,11 @@ error: question mark operator is useless here
LL | Ok(s.magic?)
| ^^^^^^^^^^^^ help: try removing question mark and `Ok()`: `s.magic`
error: aborting due to 14 previous errors
error: question mark operator is useless here
--> $DIR/needless_question_mark.rs:140:7
|
LL | { Some(a?) }
| ^^^^^^^^ help: try removing question mark and `Some()`: `a`
error: aborting due to 15 previous errors