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Update Clippy for MethodCall changes

This commit is contained in:
Aaron Hill 2020-06-09 17:44:04 -04:00
parent 28946b3486
commit 6e4d0b4205
No known key found for this signature in database
GPG Key ID: B4087E510E98B164
45 changed files with 89 additions and 89 deletions
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2
src/tools/clippy/clippy_lints/src/atomic_ordering.rs
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@ -70,7 +70,7 @@ fn match_ordering_def_path(cx: &LateContext<'_, '_>, did: DefId, orderings: &[&s
fn check_atomic_load_store(cx: &LateContext<'_, '_>, expr: &Expr<'_>) {
if_chain! {
if let ExprKind::MethodCall(ref method_path, _, args) = &expr.kind;
if let ExprKind::MethodCall(ref method_path, _, args, _) = &expr.kind;
let method = method_path.ident.name.as_str();
if type_is_atomic(cx, &args[0]);
if method == "load" || method == "store";

2
src/tools/clippy/clippy_lints/src/booleans.rs
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@ -247,7 +247,7 @@ fn simplify_not(cx: &LateContext<'_, '_>, expr: &Expr<'_>) -> Option<String> {
))
})
},
ExprKind::MethodCall(path, _, args) if args.len() == 1 => {
ExprKind::MethodCall(path, _, args, _) if args.len() == 1 => {
let type_of_receiver = cx.tables.expr_ty(&args[0]);
if !is_type_diagnostic_item(cx, type_of_receiver, sym!(option_type))
&& !is_type_diagnostic_item(cx, type_of_receiver, sym!(result_type))

6
src/tools/clippy/clippy_lints/src/bytecount.rs
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@ -38,10 +38,10 @@ declare_lint_pass!(ByteCount => [NAIVE_BYTECOUNT]);
impl<'a, 'tcx> LateLintPass<'a, 'tcx> for ByteCount {
fn check_expr(&mut self, cx: &LateContext<'_, '_>, expr: &Expr<'_>) {
if_chain! {
if let ExprKind::MethodCall(ref count, _, ref count_args) = expr.kind;
if let ExprKind::MethodCall(ref count, _, ref count_args, _) = expr.kind;
if count.ident.name == sym!(count);
if count_args.len() == 1;
if let ExprKind::MethodCall(ref filter, _, ref filter_args) = count_args[0].kind;
if let ExprKind::MethodCall(ref filter, _, ref filter_args, _) = count_args[0].kind;
if filter.ident.name == sym!(filter);
if filter_args.len() == 2;
if let ExprKind::Closure(_, _, body_id, _, _) = filter_args[1].kind;
@ -66,7 +66,7 @@ impl<'a, 'tcx> LateLintPass<'a, 'tcx> for ByteCount {
if ty::Uint(UintTy::U8) != walk_ptrs_ty(cx.tables.expr_ty(needle)).kind {
return;
}
let haystack = if let ExprKind::MethodCall(ref path, _, ref args) =
let haystack = if let ExprKind::MethodCall(ref path, _, ref args, _) =
filter_args[0].kind {
let p = path.ident.name;
if (p == sym!(iter) || p == sym!(iter_mut)) && args.len() == 1 {

2
src/tools/clippy/clippy_lints/src/dereference.rs
View File

@ -42,7 +42,7 @@ impl<'a, 'tcx> LateLintPass<'a, 'tcx> for Dereferencing {
fn check_expr(&mut self, cx: &LateContext<'a, 'tcx>, expr: &'tcx Expr<'_>) {
if_chain! {
if !expr.span.from_expansion();
if let ExprKind::MethodCall(ref method_name, _, ref args) = &expr.kind;
if let ExprKind::MethodCall(ref method_name, _, ref args, _) = &expr.kind;
if args.len() == 1;
then {

2
src/tools/clippy/clippy_lints/src/double_parens.rs
View File

@ -70,7 +70,7 @@ impl EarlyLintPass for DoubleParens {
}
}
},
ExprKind::MethodCall(_, ref params) => {
ExprKind::MethodCall(_, ref params, _) => {
if params.len() == 2 {
let param = &params[1];
if let ExprKind::Paren(_) = param.kind {

2
src/tools/clippy/clippy_lints/src/duration_subsec.rs
View File

@ -42,7 +42,7 @@ impl<'a, 'tcx> LateLintPass<'a, 'tcx> for DurationSubsec {
fn check_expr(&mut self, cx: &LateContext<'a, 'tcx>, expr: &'tcx Expr<'_>) {
if_chain! {
if let ExprKind::Binary(Spanned { node: BinOpKind::Div, .. }, ref left, ref right) = expr.kind;
if let ExprKind::MethodCall(ref method_path, _ , ref args) = left.kind;
if let ExprKind::MethodCall(ref method_path, _ , ref args, _) = left.kind;
if match_type(cx, walk_ptrs_ty(cx.tables.expr_ty(&args[0])), &paths::DURATION);
if let Some((Constant::Int(divisor), _)) = constant(cx, cx.tables, right);
then {

4
src/tools/clippy/clippy_lints/src/entry.rs
View File

@ -103,7 +103,7 @@ fn check_cond<'a, 'tcx, 'b>(
check: &'b Expr<'b>,
) -> Option<(&'static str, &'b Expr<'b>, &'b Expr<'b>)> {
if_chain! {
if let ExprKind::MethodCall(ref path, _, ref params) = check.kind;
if let ExprKind::MethodCall(ref path, _, ref params, _) = check.kind;
if params.len() >= 2;
if path.ident.name == sym!(contains_key);
if let ExprKind::AddrOf(BorrowKind::Ref, _, ref key) = params[1].kind;
@ -140,7 +140,7 @@ impl<'a, 'tcx, 'b> Visitor<'tcx> for InsertVisitor<'a, 'tcx, 'b> {
fn visit_expr(&mut self, expr: &'tcx Expr<'_>) {
if_chain! {
if let ExprKind::MethodCall(ref path, _, ref params) = expr.kind;
if let ExprKind::MethodCall(ref path, _, ref params, _) = expr.kind;
if params.len() == 3;
if path.ident.name == sym!(insert);
if get_item_name(self.cx, self.map) == get_item_name(self.cx, &params[0]);

4
src/tools/clippy/clippy_lints/src/eta_reduction.rs
View File

@ -71,7 +71,7 @@ impl<'a, 'tcx> LateLintPass<'a, 'tcx> for EtaReduction {
}
match expr.kind {
ExprKind::Call(_, args) | ExprKind::MethodCall(_, _, args) => {
ExprKind::Call(_, args) | ExprKind::MethodCall(_, _, args, _) => {
for arg in args {
check_closure(cx, arg)
}
@ -120,7 +120,7 @@ fn check_closure(cx: &LateContext<'_, '_>, expr: &Expr<'_>) {
);
if_chain!(
if let ExprKind::MethodCall(ref path, _, ref args) = ex.kind;
if let ExprKind::MethodCall(ref path, _, ref args, _) = ex.kind;
// Not the same number of arguments, there is no way the closure is the same as the function return;
if args.len() == decl.inputs.len();

4
src/tools/clippy/clippy_lints/src/explicit_write.rs
View File

@ -32,11 +32,11 @@ impl<'a, 'tcx> LateLintPass<'a, 'tcx> for ExplicitWrite {
fn check_expr(&mut self, cx: &LateContext<'a, 'tcx>, expr: &'tcx Expr<'_>) {
if_chain! {
// match call to unwrap
if let ExprKind::MethodCall(ref unwrap_fun, _, ref unwrap_args) = expr.kind;
if let ExprKind::MethodCall(ref unwrap_fun, _, ref unwrap_args, _) = expr.kind;
if unwrap_fun.ident.name == sym!(unwrap);
// match call to write_fmt
if !unwrap_args.is_empty();
if let ExprKind::MethodCall(ref write_fun, _, write_args) =
if let ExprKind::MethodCall(ref write_fun, _, write_args, _) =
unwrap_args[0].kind;
if write_fun.ident.name == sym!(write_fmt);
// match calls to std::io::stdout() / std::io::stderr ()

4
src/tools/clippy/clippy_lints/src/floating_point_arithmetic.rs
View File

@ -301,7 +301,7 @@ fn check_expm1(cx: &LateContext<'_, '_>, expr: &Expr<'_>) {
if cx.tables.expr_ty(lhs).is_floating_point();
if let Some((value, _)) = constant(cx, cx.tables, rhs);
if F32(1.0) == value || F64(1.0) == value;
if let ExprKind::MethodCall(ref path, _, ref method_args) = lhs.kind;
if let ExprKind::MethodCall(ref path, _, ref method_args, _) = lhs.kind;
if cx.tables.expr_ty(&method_args[0]).is_floating_point();
if path.ident.name.as_str() == "exp";
then {
@ -481,7 +481,7 @@ fn check_custom_abs(cx: &LateContext<'_, '_>, expr: &Expr<'_>) {
impl<'a, 'tcx> LateLintPass<'a, 'tcx> for FloatingPointArithmetic {
fn check_expr(&mut self, cx: &LateContext<'a, 'tcx>, expr: &'tcx Expr<'_>) {
if let ExprKind::MethodCall(ref path, _, args) = &expr.kind {
if let ExprKind::MethodCall(ref path, _, args, _) = &expr.kind {
let recv_ty = cx.tables.expr_ty(&args[0]);
if recv_ty.is_floating_point() {

2
src/tools/clippy/clippy_lints/src/format.rs
View File

@ -104,7 +104,7 @@ fn on_argumentv1_new<'a, 'tcx>(
}
} else {
let snip = snippet(cx, format_args.span, "<arg>");
if let ExprKind::MethodCall(ref path, _, _) = format_args.kind {
if let ExprKind::MethodCall(ref path, _, _, _) = format_args.kind {
if path.ident.name == sym!(to_string) {
return Some(format!("{}", snip));
}

4
src/tools/clippy/clippy_lints/src/functions.rs
View File

@ -556,7 +556,7 @@ impl<'a, 'tcx> intravisit::Visitor<'tcx> for DerefVisitor<'a, 'tcx> {
}
}
},
hir::ExprKind::MethodCall(_, _, args) => {
hir::ExprKind::MethodCall(_, _, args, _) => {
let def_id = self.tables.type_dependent_def_id(expr.hir_id).unwrap();
let base_type = self.cx.tcx.type_of(def_id);
@ -610,7 +610,7 @@ impl<'a, 'tcx> intravisit::Visitor<'tcx> for StaticMutVisitor<'a, 'tcx> {
return;
}
match expr.kind {
Call(_, args) | MethodCall(_, _, args) => {
Call(_, args) | MethodCall(_, _, args, _) => {
let mut tys = FxHashSet::default();
for arg in args {
let def_id = arg.hir_id.owner.to_def_id();

4
src/tools/clippy/clippy_lints/src/get_last_with_len.rs
View File

@ -47,7 +47,7 @@ impl<'a, 'tcx> LateLintPass<'a, 'tcx> for GetLastWithLen {
fn check_expr(&mut self, cx: &LateContext<'a, 'tcx>, expr: &'tcx Expr<'_>) {
if_chain! {
// Is a method call
if let ExprKind::MethodCall(ref path, _, ref args) = expr.kind;
if let ExprKind::MethodCall(ref path, _, ref args, _) = expr.kind;
// Method name is "get"
if path.ident.name == sym!(get);
@ -69,7 +69,7 @@ impl<'a, 'tcx> LateLintPass<'a, 'tcx> for GetLastWithLen {
) = &get_index_arg.kind;
// LHS of subtraction is "x.len()"
if let ExprKind::MethodCall(arg_lhs_path, _, lhs_args) = &lhs.kind;
if let ExprKind::MethodCall(arg_lhs_path, _, lhs_args, _) = &lhs.kind;
if arg_lhs_path.ident.name == sym!(len);
if let Some(arg_lhs_struct) = lhs_args.get(0);

2
src/tools/clippy/clippy_lints/src/if_let_mutex.rs
View File

@ -147,7 +147,7 @@ impl<'tcx, 'l> ArmVisitor<'tcx, 'l> {
fn is_mutex_lock_call<'a>(cx: &LateContext<'a, '_>, expr: &'a Expr<'_>) -> Option<&'a Expr<'a>> {
if_chain! {
if let ExprKind::MethodCall(path, _span, args) = &expr.kind;
if let ExprKind::MethodCall(path, _span, args, _) = &expr.kind;
if path.ident.to_string() == "lock";
let ty = cx.tables.expr_ty(&args[0]);
if is_type_diagnostic_item(cx, ty, sym!(mutex_type));

2
src/tools/clippy/clippy_lints/src/if_let_some_result.rs
View File

@ -42,7 +42,7 @@ impl<'a, 'tcx> LateLintPass<'a, 'tcx> for OkIfLet {
if_chain! { //begin checking variables
if let ExprKind::Match(ref op, ref body, source) = expr.kind; //test if expr is a match
if let MatchSource::IfLetDesugar { .. } = source; //test if it is an If Let
if let ExprKind::MethodCall(_, ok_span, ref result_types) = op.kind; //check is expr.ok() has type Result<T,E>.ok()
if let ExprKind::MethodCall(_, ok_span, ref result_types, _) = op.kind; //check is expr.ok() has type Result<T,E>.ok(, _)
if let PatKind::TupleStruct(QPath::Resolved(_, ref x), ref y, _) = body[0].pat.kind; //get operation
if method_chain_args(op, &["ok"]).is_some(); //test to see if using ok() methoduse std::marker::Sized;
if is_type_diagnostic_item(cx, cx.tables.expr_ty(&result_types[0]), sym!(result_type));

4
src/tools/clippy/clippy_lints/src/infinite_iter.rs
View File

@ -142,7 +142,7 @@ const HEURISTICS: [(&str, usize, Heuristic, Finiteness); 19] = [
fn is_infinite(cx: &LateContext<'_, '_>, expr: &Expr<'_>) -> Finiteness {
match expr.kind {
ExprKind::MethodCall(ref method, _, ref args) => {
ExprKind::MethodCall(ref method, _, ref args, _) => {
for &(name, len, heuristic, cap) in &HEURISTICS {
if method.ident.name.as_str() == name && args.len() == len {
return (match heuristic {
@ -218,7 +218,7 @@ const INFINITE_COLLECTORS: [&[&str]; 8] = [
fn complete_infinite_iter(cx: &LateContext<'_, '_>, expr: &Expr<'_>) -> Finiteness {
match expr.kind {
ExprKind::MethodCall(ref method, _, ref args) => {
ExprKind::MethodCall(ref method, _, ref args, _) => {
for &(name, len) in &COMPLETING_METHODS {
if method.ident.name.as_str() == name && args.len() == len {
return is_infinite(cx, &args[0]);

2
src/tools/clippy/clippy_lints/src/len_zero.rs
View File

@ -211,7 +211,7 @@ fn check_impl_items(cx: &LateContext<'_, '_>, item: &Item<'_>, impl_items: &[Imp
}
fn check_cmp(cx: &LateContext<'_, '_>, span: Span, method: &Expr<'_>, lit: &Expr<'_>, op: &str, compare_to: u32) {
if let (&ExprKind::MethodCall(ref method_path, _, ref args), &ExprKind::Lit(ref lit)) = (&method.kind, &lit.kind) {
if let (&ExprKind::MethodCall(ref method_path, _, ref args, _), &ExprKind::Lit(ref lit)) = (&method.kind, &lit.kind) {
// check if we are in an is_empty() method
if let Some(name) = get_item_name(cx, method) {
if name.as_str() == "is_empty" {

22
src/tools/clippy/clippy_lints/src/loops.rs
View File

@ -526,7 +526,7 @@ impl<'a, 'tcx> LateLintPass<'a, 'tcx> for Loops {
let pat = &arms[0].pat.kind;
if let (
&PatKind::TupleStruct(ref qpath, ref pat_args, _),
&ExprKind::MethodCall(ref method_path, _, ref method_args),
&ExprKind::MethodCall(ref method_path, _, ref method_args, _),
) = (pat, &match_expr.kind)
{
let iter_expr = &method_args[0];
@ -654,7 +654,7 @@ fn never_loop_expr(expr: &Expr<'_>, main_loop_id: HirId) -> NeverLoopResult {
| ExprKind::Struct(_, _, Some(ref e))
| ExprKind::Repeat(ref e, _)
| ExprKind::DropTemps(ref e) => never_loop_expr(e, main_loop_id),
ExprKind::Array(ref es) | ExprKind::MethodCall(_, _, ref es) | ExprKind::Tup(ref es) => {
ExprKind::Array(ref es) | ExprKind::MethodCall(_, _, ref es, _) | ExprKind::Tup(ref es) => {
never_loop_expr_all(&mut es.iter(), main_loop_id)
},
ExprKind::Call(ref e, ref es) => never_loop_expr_all(&mut once(&**e).chain(es.iter()), main_loop_id),
@ -806,7 +806,7 @@ fn is_slice_like<'a, 'tcx>(cx: &LateContext<'a, 'tcx>, ty: Ty<'_>) -> bool {
fn fetch_cloned_expr<'tcx>(expr: &'tcx Expr<'tcx>) -> &'tcx Expr<'tcx> {
if_chain! {
if let ExprKind::MethodCall(method, _, args) = expr.kind;
if let ExprKind::MethodCall(method, _, args, _) = expr.kind;
if method.ident.name == sym!(clone);
if args.len() == 1;
if let Some(arg) = args.get(0);
@ -915,7 +915,7 @@ fn build_manual_memcpy_suggestion<'a, 'tcx>(
let print_limit = |end: &Expr<'_>, offset: Offset, var: &Expr<'_>| {
if_chain! {
if let ExprKind::MethodCall(method, _, len_args) = end.kind;
if let ExprKind::MethodCall(method, _, len_args, _) = end.kind;
if method.ident.name == sym!(len);
if len_args.len() == 1;
if let Some(arg) = len_args.get(0);
@ -1190,7 +1190,7 @@ fn check_for_loop_range<'a, 'tcx>(
fn is_len_call(expr: &Expr<'_>, var: Name) -> bool {
if_chain! {
if let ExprKind::MethodCall(ref method, _, ref len_args) = expr.kind;
if let ExprKind::MethodCall(ref method, _, ref len_args, _) = expr.kind;
if len_args.len() == 1;
if method.ident.name == sym!(len);
if let ExprKind::Path(QPath::Resolved(_, ref path)) = len_args[0].kind;
@ -1244,7 +1244,7 @@ fn lint_iter_method(cx: &LateContext<'_, '_>, args: &[Expr<'_>], arg: &Expr<'_>,
fn check_for_loop_arg(cx: &LateContext<'_, '_>, pat: &Pat<'_>, arg: &Expr<'_>, expr: &Expr<'_>) {
let mut next_loop_linted = false; // whether or not ITER_NEXT_LOOP lint was used
if let ExprKind::MethodCall(ref method, _, ref args) = arg.kind {
if let ExprKind::MethodCall(ref method, _, ref args, _) = arg.kind {
// just the receiver, no arguments
if args.len() == 1 {
let method_name = &*method.ident.as_str();
@ -1718,7 +1718,7 @@ impl<'a, 'tcx> Visitor<'tcx> for VarVisitor<'a, 'tcx> {
fn visit_expr(&mut self, expr: &'tcx Expr<'_>) {
if_chain! {
// a range index op
if let ExprKind::MethodCall(ref meth, _, ref args) = expr.kind;
if let ExprKind::MethodCall(ref meth, _, ref args, _) = expr.kind;
if (meth.ident.name == sym!(index) && match_trait_method(self.cx, expr, &paths::INDEX))
|| (meth.ident.name == sym!(index_mut) && match_trait_method(self.cx, expr, &paths::INDEX_MUT));
if !self.check(&args[1], &args[0], expr);
@ -1776,7 +1776,7 @@ impl<'a, 'tcx> Visitor<'tcx> for VarVisitor<'a, 'tcx> {
self.visit_expr(expr);
}
},
ExprKind::MethodCall(_, _, args) => {
ExprKind::MethodCall(_, _, args, _) => {
let def_id = self.cx.tables.type_dependent_def_id(expr.hir_id).unwrap();
for (ty, expr) in self.cx.tcx.fn_sig(def_id).inputs().skip_binder().iter().zip(args) {
self.prefer_mutable = false;
@ -2369,8 +2369,8 @@ const NEEDLESS_COLLECT_MSG: &str = "avoid using `collect()` when not needed";
fn check_needless_collect<'a, 'tcx>(expr: &'tcx Expr<'_>, cx: &LateContext<'a, 'tcx>) {
if_chain! {
if let ExprKind::MethodCall(ref method, _, ref args) = expr.kind;
if let ExprKind::MethodCall(ref chain_method, _, _) = args[0].kind;
if let ExprKind::MethodCall(ref method, _, ref args, _) = expr.kind;
if let ExprKind::MethodCall(ref chain_method, _, _, _) = args[0].kind;
if chain_method.ident.name == sym!(collect) && match_trait_method(cx, &args[0], &paths::ITERATOR);
if let Some(ref generic_args) = chain_method.args;
if let Some(GenericArg::Type(ref ty)) = generic_args.args.get(0);
@ -2437,7 +2437,7 @@ fn check_needless_collect<'a, 'tcx>(expr: &'tcx Expr<'_>, cx: &LateContext<'a, '
fn shorten_span(expr: &Expr<'_>, target_fn_name: Symbol) -> Span {
let mut current_expr = expr;
while let ExprKind::MethodCall(ref path, ref span, ref args) = current_expr.kind {
while let ExprKind::MethodCall(ref path, ref span, ref args, _) = current_expr.kind {
if path.ident.name == target_fn_name {
return expr.span.with_lo(span.lo());
}

4
src/tools/clippy/clippy_lints/src/map_clone.rs
View File

@ -49,7 +49,7 @@ impl<'a, 'tcx> LateLintPass<'a, 'tcx> for MapClone {
}
if_chain! {
if let hir::ExprKind::MethodCall(ref method, _, ref args) = e.kind;
if let hir::ExprKind::MethodCall(ref method, _, ref args, _) = e.kind;
if args.len() == 2;
if method.ident.as_str() == "map";
let ty = cx.tables.expr_ty(&args[0]);
@ -75,7 +75,7 @@ impl<'a, 'tcx> LateLintPass<'a, 'tcx> for MapClone {
}
}
},
hir::ExprKind::MethodCall(ref method, _, ref obj) => {
hir::ExprKind::MethodCall(ref method, _, ref obj, _) => {
if ident_eq(name, &obj[0]) && method.ident.as_str() == "clone"
&& match_trait_method(cx, closure_expr, &paths::CLONE_TRAIT) {

2
src/tools/clippy/clippy_lints/src/map_unit_fn.rs
View File

@ -125,7 +125,7 @@ fn reduce_unit_expression<'a>(cx: &LateContext<'_, '_>, expr: &'a hir::Expr<'_>)
}
match expr.kind {
hir::ExprKind::Call(_, _) | hir::ExprKind::MethodCall(_, _, _) => {
hir::ExprKind::Call(_, _) | hir::ExprKind::MethodCall(_, _, _, _) => {
// Calls can't be reduced any more
Some(expr.span)
},

16
src/tools/clippy/clippy_lints/src/methods/mod.rs
View File

@ -1429,7 +1429,7 @@ impl<'a, 'tcx> LateLintPass<'a, 'tcx> for Methods {
}
match expr.kind {
hir::ExprKind::MethodCall(ref method_call, ref method_span, ref args) => {
hir::ExprKind::MethodCall(ref method_call, ref method_span, ref args, _) => {
lint_or_fun_call(cx, expr, *method_span, &method_call.ident.as_str(), args);
lint_expect_fun_call(cx, expr, *method_span, &method_call.ident.as_str(), args);
@ -1677,7 +1677,7 @@ fn lint_or_fun_call<'a, 'tcx>(
or_has_args: bool,
span: Span,
) {
if let hir::ExprKind::MethodCall(ref path, _, ref args) = &arg.kind {
if let hir::ExprKind::MethodCall(ref path, _, ref args, _) = &arg.kind {
if path.ident.as_str() == "len" {
let ty = walk_ptrs_ty(cx.tables.expr_ty(&args[0]));
@ -1751,7 +1751,7 @@ fn lint_or_fun_call<'a, 'tcx>(
);
}
},
hir::ExprKind::MethodCall(_, span, ref or_args) => check_general_case(
hir::ExprKind::MethodCall(_, span, ref or_args, _) => check_general_case(
cx,
name,
method_span,
@ -1782,7 +1782,7 @@ fn lint_expect_fun_call(
loop {
arg_root = match &arg_root.kind {
hir::ExprKind::AddrOf(hir::BorrowKind::Ref, _, expr) => expr,
hir::ExprKind::MethodCall(method_name, _, call_args) => {
hir::ExprKind::MethodCall(method_name, _, call_args, _) => {
if call_args.len() == 1
&& (method_name.ident.name == sym!(as_str) || method_name.ident.name == sym!(as_ref))
&& {
@ -2002,7 +2002,7 @@ fn lint_clone_on_copy(cx: &LateContext<'_, '_>, expr: &hir::Expr<'_>, arg: &hir:
// &*x is a nop, &x.clone() is not
hir::ExprKind::AddrOf(..) => return,
// (*x).func() is useless, x.clone().func() can work in case func borrows mutably
hir::ExprKind::MethodCall(_, _, parent_args) if expr.hir_id == parent_args[0].hir_id => return,
hir::ExprKind::MethodCall(_, _, parent_args, _) if expr.hir_id == parent_args[0].hir_id => return,
_ => {},
},
@ -2478,7 +2478,7 @@ fn derefs_to_slice<'a, 'tcx>(
}
}
if let hir::ExprKind::MethodCall(ref path, _, ref args) = expr.kind {
if let hir::ExprKind::MethodCall(ref path, _, ref args, _) = expr.kind {
if path.ident.name == sym!(iter) && may_slice(cx, cx.tables.expr_ty(&args[0])) {
Some(&args[0])
} else {
@ -3182,7 +3182,7 @@ fn lint_asref(cx: &LateContext<'_, '_>, expr: &hir::Expr<'_>, call_name: &str, a
// allow the `as_ref` or `as_mut` if it is followed by another method call
if_chain! {
if let Some(parent) = get_parent_expr(cx, expr);
if let hir::ExprKind::MethodCall(_, ref span, _) = parent.kind;
if let hir::ExprKind::MethodCall(_, ref span, _, _) = parent.kind;
if span != &expr.span;
then {
return;
@ -3310,7 +3310,7 @@ fn lint_option_as_ref_deref<'a, 'tcx>(
let closure_expr = remove_blocks(&closure_body.value);
match &closure_expr.kind {
hir::ExprKind::MethodCall(_, _, args) => {
hir::ExprKind::MethodCall(_, _, args, _) => {
if_chain! {
if args.len() == 1;
if let hir::ExprKind::Path(qpath) = &args[0].kind;

4
src/tools/clippy/clippy_lints/src/misc.rs
View File

@ -545,7 +545,7 @@ fn is_signum(cx: &LateContext<'_, '_>, expr: &Expr<'_>) -> bool {
}
if_chain! {
if let ExprKind::MethodCall(ref method_name, _, ref expressions) = expr.kind;
if let ExprKind::MethodCall(ref method_name, _, ref expressions, _) = expr.kind;
if sym!(signum) == method_name.ident.name;
// Check that the receiver of the signum() is a float (expressions[0] is the receiver of
// the method call)
@ -572,7 +572,7 @@ fn is_array(cx: &LateContext<'_, '_>, expr: &Expr<'_>) -> bool {
fn check_to_owned(cx: &LateContext<'_, '_>, expr: &Expr<'_>, other: &Expr<'_>) {
let (arg_ty, snip) = match expr.kind {
ExprKind::MethodCall(.., ref args) if args.len() == 1 => {
ExprKind::MethodCall(.., ref args, _) if args.len() == 1 => {
if match_trait_method(cx, expr, &paths::TO_STRING) || match_trait_method(cx, expr, &paths::TO_OWNED) {
(cx.tables.expr_ty_adjusted(&args[0]), snippet(cx, args[0].span, ".."))
} else {

2
src/tools/clippy/clippy_lints/src/mut_reference.rs
View File

@ -42,7 +42,7 @@ impl<'a, 'tcx> LateLintPass<'a, 'tcx> for UnnecessaryMutPassed {
);
}
},
ExprKind::MethodCall(ref path, _, ref arguments) => {
ExprKind::MethodCall(ref path, _, ref arguments, _) => {
let def_id = cx.tables.type_dependent_def_id(e.hir_id).unwrap();
let substs = cx.tables.node_substs(e.hir_id);
let method_type = cx.tcx.type_of(def_id).subst(cx.tcx, substs);

4
src/tools/clippy/clippy_lints/src/open_options.rs
View File

@ -29,7 +29,7 @@ declare_lint_pass!(OpenOptions => [NONSENSICAL_OPEN_OPTIONS]);
impl<'a, 'tcx> LateLintPass<'a, 'tcx> for OpenOptions {
fn check_expr(&mut self, cx: &LateContext<'a, 'tcx>, e: &'tcx Expr<'_>) {
if let ExprKind::MethodCall(ref path, _, ref arguments) = e.kind {
if let ExprKind::MethodCall(ref path, _, ref arguments, _) = e.kind {
let obj_ty = walk_ptrs_ty(cx.tables.expr_ty(&arguments[0]));
if path.ident.name == sym!(open) && match_type(cx, obj_ty, &paths::OPEN_OPTIONS) {
let mut options = Vec::new();
@ -57,7 +57,7 @@ enum OpenOption {
}
fn get_open_options(cx: &LateContext<'_, '_>, argument: &Expr<'_>, options: &mut Vec<(OpenOption, Argument)>) {
if let ExprKind::MethodCall(ref path, _, ref arguments) = argument.kind {
if let ExprKind::MethodCall(ref path, _, ref arguments, _) = argument.kind {
let obj_ty = walk_ptrs_ty(cx.tables.expr_ty(&arguments[0]));
// Only proceed if this is a call on some object of type std::fs::OpenOptions

2
src/tools/clippy/clippy_lints/src/option_env_unwrap.rs
View File

@ -35,7 +35,7 @@ declare_lint_pass!(OptionEnvUnwrap => [OPTION_ENV_UNWRAP]);
impl EarlyLintPass for OptionEnvUnwrap {
fn check_expr(&mut self, cx: &EarlyContext<'_>, expr: &Expr) {
if_chain! {
if let ExprKind::MethodCall(path_segment, args) = &expr.kind;
if let ExprKind::MethodCall(path_segment, args, _) = &expr.kind;
let method_name = path_segment.ident.as_str();
if method_name == "expect" || method_name == "unwrap";
if let ExprKind::Call(caller, _) = &args[0].kind;

2
src/tools/clippy/clippy_lints/src/path_buf_push_overwrite.rs
View File

@ -43,7 +43,7 @@ declare_lint_pass!(PathBufPushOverwrite => [PATH_BUF_PUSH_OVERWRITE]);
impl<'a, 'tcx> LateLintPass<'a, 'tcx> for PathBufPushOverwrite {
fn check_expr(&mut self, cx: &LateContext<'a, 'tcx>, expr: &'tcx Expr<'_>) {
if_chain! {
if let ExprKind::MethodCall(ref path, _, ref args) = expr.kind;
if let ExprKind::MethodCall(ref path, _, ref args, _) = expr.kind;
if path.ident.name == sym!(push);
if args.len() == 2;
if match_type(cx, walk_ptrs_ty(cx.tables.expr_ty(&args[0])), &paths::PATH_BUF);

2
src/tools/clippy/clippy_lints/src/precedence.rs
View File

@ -103,7 +103,7 @@ impl EarlyLintPass for Precedence {
}
if let ExprKind::Unary(UnOp::Neg, ref rhs) = expr.kind {
if let ExprKind::MethodCall(ref path_segment, ref args) = rhs.kind {
if let ExprKind::MethodCall(ref path_segment, ref args, _) = rhs.kind {
let path_segment_str = path_segment.ident.name.as_str();
if let Some(slf) = args.first() {
if let ExprKind::Lit(ref lit) = slf.kind {

2
src/tools/clippy/clippy_lints/src/ptr_offset_with_cast.rs
View File

@ -90,7 +90,7 @@ fn expr_as_ptr_offset_call<'a, 'tcx>(
cx: &LateContext<'a, 'tcx>,
expr: &'tcx Expr<'_>,
) -> Option<(&'tcx Expr<'tcx>, &'tcx Expr<'tcx>, Method)> {
if let ExprKind::MethodCall(ref path_segment, _, ref args) = expr.kind {
if let ExprKind::MethodCall(ref path_segment, _, ref args, _) = expr.kind {
if is_expr_ty_raw_ptr(cx, &args[0]) {
if path_segment.ident.name == sym!(offset) {
return Some((&args[0], &args[1], Method::Offset));

2
src/tools/clippy/clippy_lints/src/question_mark.rs
View File

@ -50,7 +50,7 @@ impl QuestionMark {
fn check_is_none_and_early_return_none(cx: &LateContext<'_, '_>, expr: &Expr<'_>) {
if_chain! {
if let Some((if_expr, body, else_)) = higher::if_block(&expr);
if let ExprKind::MethodCall(segment, _, args) = &if_expr.kind;
if let ExprKind::MethodCall(segment, _, args, _) = &if_expr.kind;
if segment.ident.name == sym!(is_none);
if Self::expression_returns_none(cx, body);
if let Some(subject) = args.get(0);

6
src/tools/clippy/clippy_lints/src/ranges.rs
View File

@ -129,20 +129,20 @@ declare_lint_pass!(Ranges => [
impl<'a, 'tcx> LateLintPass<'a, 'tcx> for Ranges {
fn check_expr(&mut self, cx: &LateContext<'a, 'tcx>, expr: &'tcx Expr<'_>) {
if let ExprKind::MethodCall(ref path, _, ref args) = expr.kind {
if let ExprKind::MethodCall(ref path, _, ref args, _) = expr.kind {
let name = path.ident.as_str();
if name == "zip" && args.len() == 2 {
let iter = &args[0].kind;
let zip_arg = &args[1];
if_chain! {
// `.iter()` call
if let ExprKind::MethodCall(ref iter_path, _, ref iter_args ) = *iter;
if let ExprKind::MethodCall(ref iter_path, _, ref iter_args , _) = *iter;
if iter_path.ident.name == sym!(iter);
// range expression in `.zip()` call: `0..x.len()`
if let Some(higher::Range { start: Some(start), end: Some(end), .. }) = higher::range(cx, zip_arg);
if is_integer_const(cx, start, 0);
// `.len()` call
if let ExprKind::MethodCall(ref len_path, _, ref len_args) = end.kind;
if let ExprKind::MethodCall(ref len_path, _, ref len_args, _) = end.kind;
if len_path.ident.name == sym!(len) && len_args.len() == 1;
// `.iter()` and `.len()` called on same `Path`
if let ExprKind::Path(QPath::Resolved(_, ref iter_path)) = iter_args[0].kind;

2
src/tools/clippy/clippy_lints/src/redundant_pattern_matching.rs
View File

@ -89,7 +89,7 @@ fn find_sugg_for_if_let<'a, 'tcx>(
// check that `while_let_on_iterator` lint does not trigger
if_chain! {
if keyword == "while";
if let ExprKind::MethodCall(method_path, _, _) = op.kind;
if let ExprKind::MethodCall(method_path, _, _, _) = op.kind;
if method_path.ident.name == sym!(next);
if match_trait_method(cx, op, &paths::ITERATOR);
then {

6
src/tools/clippy/clippy_lints/src/slow_vector_initialization.rs
View File

@ -207,7 +207,7 @@ impl<'a, 'tcx> VectorInitializationVisitor<'a, 'tcx> {
fn search_slow_extend_filling(&mut self, expr: &'tcx Expr<'_>) {
if_chain! {
if self.initialization_found;
if let ExprKind::MethodCall(ref path, _, ref args) = expr.kind;
if let ExprKind::MethodCall(ref path, _, ref args, _) = expr.kind;
if let ExprKind::Path(ref qpath_subj) = args[0].kind;
if match_qpath(&qpath_subj, &[&*self.vec_alloc.variable_name.as_str()]);
if path.ident.name == sym!(extend);
@ -224,7 +224,7 @@ impl<'a, 'tcx> VectorInitializationVisitor<'a, 'tcx> {
fn search_slow_resize_filling(&mut self, expr: &'tcx Expr<'_>) {
if_chain! {
if self.initialization_found;
if let ExprKind::MethodCall(ref path, _, ref args) = expr.kind;
if let ExprKind::MethodCall(ref path, _, ref args, _) = expr.kind;
if let ExprKind::Path(ref qpath_subj) = args[0].kind;
if match_qpath(&qpath_subj, &[&*self.vec_alloc.variable_name.as_str()]);
if path.ident.name == sym!(resize);
@ -246,7 +246,7 @@ impl<'a, 'tcx> VectorInitializationVisitor<'a, 'tcx> {
/// Returns `true` if give expression is `repeat(0).take(...)`
fn is_repeat_take(&self, expr: &Expr<'_>) -> bool {
if_chain! {
if let ExprKind::MethodCall(ref take_path, _, ref take_args) = expr.kind;
if let ExprKind::MethodCall(ref take_path, _, ref take_args, _) = expr.kind;
if take_path.ident.name == sym!(take);
// Check that take is applied to `repeat(0)`

2
src/tools/clippy/clippy_lints/src/strings.rs
View File

@ -164,7 +164,7 @@ impl<'a, 'tcx> LateLintPass<'a, 'tcx> for StringLitAsBytes {
use rustc_ast::ast::LitKind;
if_chain! {
if let ExprKind::MethodCall(path, _, args) = &e.kind;
if let ExprKind::MethodCall(path, _, args, _) = &e.kind;
if path.ident.name == sym!(as_bytes);
if let ExprKind::Lit(lit) = &args[0].kind;
if let LitKind::Str(lit_content, _) = &lit.node;

4
src/tools/clippy/clippy_lints/src/to_digit_is_some.rs
View File

@ -34,12 +34,12 @@ declare_lint_pass!(ToDigitIsSome => [TO_DIGIT_IS_SOME]);
impl<'a, 'tcx> LateLintPass<'a, 'tcx> for ToDigitIsSome {
fn check_expr(&mut self, cx: &LateContext<'a, 'tcx>, expr: &'tcx hir::Expr<'_>) {
if_chain! {
if let hir::ExprKind::MethodCall(is_some_path, _, is_some_args) = &expr.kind;
if let hir::ExprKind::MethodCall(is_some_path, _, is_some_args, _) = &expr.kind;
if is_some_path.ident.name.as_str() == "is_some";
if let [to_digit_expr] = &**is_some_args;
then {
let match_result = match &to_digit_expr.kind {
hir::ExprKind::MethodCall(to_digits_path, _, to_digit_args) => {
hir::ExprKind::MethodCall(to_digits_path, _, to_digit_args, _) => {
if_chain! {
if let [char_arg, radix_arg] = &**to_digit_args;
if to_digits_path.ident.name.as_str() == "to_digit";

6
src/tools/clippy/clippy_lints/src/types.rs
View File

@ -778,7 +778,7 @@ impl<'a, 'tcx> LateLintPass<'a, 'tcx> for UnitArg {
}
match expr.kind {
ExprKind::Call(_, args) | ExprKind::MethodCall(_, _, args) => {
ExprKind::Call(_, args) | ExprKind::MethodCall(_, _, args, _) => {
let args_to_recover = args
.iter()
.filter(|arg| {
@ -1262,14 +1262,14 @@ fn check_loss_of_sign(cx: &LateContext<'_, '_>, expr: &Expr<'_>, op: &Expr<'_>,
}
// don't lint for the result of methods that always return non-negative values
if let ExprKind::MethodCall(ref path, _, _) = op.kind {
if let ExprKind::MethodCall(ref path, _, _, _) = op.kind {
let mut method_name = path.ident.name.as_str();
let whitelisted_methods = ["abs", "checked_abs", "rem_euclid", "checked_rem_euclid"];
if_chain! {
if method_name == "unwrap";
if let Some(arglist) = method_chain_args(op, &["unwrap"]);
if let ExprKind::MethodCall(ref inner_path, _, _) = &arglist[0][0].kind;
if let ExprKind::MethodCall(ref inner_path, _, _, _) = &arglist[0][0].kind;
then {
method_name = inner_path.ident.name.as_str();
}

4
src/tools/clippy/clippy_lints/src/unused_io_amount.rs
View File

@ -52,7 +52,7 @@ impl<'a, 'tcx> LateLintPass<'a, 'tcx> for UnusedIoAmount {
}
},
hir::ExprKind::MethodCall(ref path, _, ref args) => match &*path.ident.as_str() {
hir::ExprKind::MethodCall(ref path, _, ref args, _) => match &*path.ident.as_str() {
"expect" | "unwrap" | "unwrap_or" | "unwrap_or_else" => {
check_method_call(cx, &args[0], expr);
},
@ -65,7 +65,7 @@ impl<'a, 'tcx> LateLintPass<'a, 'tcx> for UnusedIoAmount {
}
fn check_method_call(cx: &LateContext<'_, '_>, call: &hir::Expr<'_>, expr: &hir::Expr<'_>) {
if let hir::ExprKind::MethodCall(ref path, _, _) = call.kind {
if let hir::ExprKind::MethodCall(ref path, _, _, _) = call.kind {
let symbol = &*path.ident.as_str();
let read_trait = match_trait_method(cx, call, &paths::IO_READ);
let write_trait = match_trait_method(cx, call, &paths::IO_WRITE);

4
src/tools/clippy/clippy_lints/src/unwrap.rs
View File

@ -112,7 +112,7 @@ fn collect_unwrap_info<'a, 'tcx>(
return collect_unwrap_info(cx, expr, branch, !invert);
} else {
if_chain! {
if let ExprKind::MethodCall(method_name, _, args) = &expr.kind;
if let ExprKind::MethodCall(method_name, _, args, _) = &expr.kind;
if let ExprKind::Path(QPath::Resolved(None, path)) = &args[0].kind;
let ty = cx.tables.expr_ty(&args[0]);
let name = method_name.ident.as_str();
@ -166,7 +166,7 @@ impl<'a, 'tcx> Visitor<'tcx> for UnwrappableVariablesVisitor<'a, 'tcx> {
} else {
// find `unwrap[_err]()` calls:
if_chain! {
if let ExprKind::MethodCall(ref method_name, _, ref args) = expr.kind;
if let ExprKind::MethodCall(ref method_name, _, ref args, _) = expr.kind;
if let ExprKind::Path(QPath::Resolved(None, ref path)) = args[0].kind;
if [sym!(unwrap), sym!(unwrap_err)].contains(&method_name.ident.name);
let call_to_unwrap = method_name.ident.name == sym!(unwrap);

2
src/tools/clippy/clippy_lints/src/useless_conversion.rs
View File

@ -61,7 +61,7 @@ impl<'a, 'tcx> LateLintPass<'a, 'tcx> for UselessConversion {
}
},
ExprKind::MethodCall(ref name, .., ref args) => {
ExprKind::MethodCall(ref name, .., ref args, _) => {
if match_trait_method(cx, e, &paths::INTO) && &*name.ident.as_str() == "into" {
let a = cx.tables.expr_ty(e);
let b = cx.tables.expr_ty(&args[0]);

4
src/tools/clippy/clippy_lints/src/utils/author.rs
View File

@ -250,8 +250,8 @@ impl<'tcx> Visitor<'tcx> for PrintVisitor {
self.visit_expr(arg);
}
},
ExprKind::MethodCall(ref _method_name, ref _generics, ref _args) => {
println!("MethodCall(ref method_name, ref generics, ref args) = {};", current);
ExprKind::MethodCall(ref _method_name, ref _generics, ref _args, ref _fn_span) => {
println!("MethodCall(ref method_name, ref generics, ref args, ref fn_span) = {};", current);
println!(" // unimplemented: `ExprKind::MethodCall` is not further destructured at the moment");
},
ExprKind::Tup(ref elements) => {

4
src/tools/clippy/clippy_lints/src/utils/hir_utils.rs
View File

@ -132,7 +132,7 @@ impl<'a, 'tcx> SpanlessEq<'a, 'tcx> {
&& self.eq_pat(&l.pat, &r.pat)
})
},
(&ExprKind::MethodCall(l_path, _, l_args), &ExprKind::MethodCall(r_path, _, r_args)) => {
(&ExprKind::MethodCall(l_path, _, l_args, _), &ExprKind::MethodCall(r_path, _, r_args, _)) => {
!self.ignore_fn && self.eq_path_segment(l_path, r_path) && self.eq_exprs(l_args, r_args)
},
(&ExprKind::Repeat(ref le, ref ll_id), &ExprKind::Repeat(ref re, ref rl_id)) => {
@ -542,7 +542,7 @@ impl<'a, 'tcx> SpanlessHash<'a, 'tcx> {
s.hash(&mut self.s);
},
ExprKind::MethodCall(ref path, ref _tys, args) => {
ExprKind::MethodCall(ref path, ref _tys, args, ref _fn_span) => {
self.hash_name(path.ident.name);
self.hash_exprs(args);
},

2
src/tools/clippy/clippy_lints/src/utils/inspector.rs
View File

@ -167,7 +167,7 @@ fn print_expr(cx: &LateContext<'_, '_>, expr: &hir::Expr<'_>, indent: usize) {
print_expr(cx, arg, indent + 1);
}
},
hir::ExprKind::MethodCall(ref path, _, args) => {
hir::ExprKind::MethodCall(ref path, _, args, _) => {
println!("{}MethodCall", ind);
println!("{}method name: {}", ind, path.ident.name);
for arg in args {

4
src/tools/clippy/clippy_lints/src/utils/internal_lints.rs
View File

@ -402,7 +402,7 @@ impl<'a, 'tcx> LateLintPass<'a, 'tcx> for CompilerLintFunctions {
}
if_chain! {
if let ExprKind::MethodCall(ref path, _, ref args) = expr.kind;
if let ExprKind::MethodCall(ref path, _, ref args, _) = expr.kind;
let fn_name = path.ident;
if let Some(sugg) = self.map.get(&*fn_name.as_str());
let ty = walk_ptrs_ty(cx.tables.expr_ty(&args[0]));
@ -491,7 +491,7 @@ impl<'a, 'tcx> LateLintPass<'a, 'tcx> for CollapsibleCalls {
let stmts = &block.stmts;
if stmts.len() == 1 && block.expr.is_none();
if let StmtKind::Semi(only_expr) = &stmts[0].kind;
if let ExprKind::MethodCall(ref ps, _, ref span_call_args) = &only_expr.kind;
if let ExprKind::MethodCall(ref ps, _, ref span_call_args, _) = &only_expr.kind;
let and_then_snippets = get_and_then_snippets(cx, and_then_args);
let mut sle = SpanlessEq::new(cx).ignore_fn();
then {

6
src/tools/clippy/clippy_lints/src/utils/mod.rs
View File

@ -379,7 +379,7 @@ pub fn method_calls<'tcx>(
let mut current = expr;
for _ in 0..max_depth {
if let ExprKind::MethodCall(path, span, args) = &current.kind {
if let ExprKind::MethodCall(path, span, args, _) = &current.kind {
if args.iter().any(|e| e.span.from_expansion()) {
break;
}
@ -406,7 +406,7 @@ pub fn method_chain_args<'a>(expr: &'a Expr<'_>, methods: &[&str]) -> Option<Vec
let mut matched = Vec::with_capacity(methods.len());
for method_name in methods.iter().rev() {
// method chains are stored last -> first
if let ExprKind::MethodCall(ref path, _, ref args) = current.kind {
if let ExprKind::MethodCall(ref path, _, ref args, _) = current.kind {
if path.ident.name.as_str() == *method_name {
if args.iter().any(|e| e.span.from_expansion()) {
return None;
@ -1324,7 +1324,7 @@ pub fn is_must_use_func_call(cx: &LateContext<'_, '_>, expr: &Expr<'_>) -> bool
None
}
},
ExprKind::MethodCall(_, _, _) => cx.tables.type_dependent_def_id(expr.hir_id),
ExprKind::MethodCall(_, _, _, _) => cx.tables.type_dependent_def_id(expr.hir_id),
_ => None,
};

2
src/tools/clippy/clippy_lints/src/utils/ptr.rs
View File

@ -58,7 +58,7 @@ impl<'a, 'tcx> Visitor<'tcx> for PtrCloneVisitor<'a, 'tcx> {
if self.abort {
return;
}
if let ExprKind::MethodCall(ref seg, _, ref args) = expr.kind {
if let ExprKind::MethodCall(ref seg, _, ref args, _) = expr.kind {
if args.len() == 1 && match_var(&args[0], self.name) {
if seg.ident.name.as_str() == "capacity" {
self.abort = true;

4
src/tools/clippy/clippy_lints/src/verbose_file_reads.rs
View File

@ -59,7 +59,7 @@ impl<'a, 'tcx> LateLintPass<'a, 'tcx> for VerboseFileReads {
fn is_file_read_to_end<'a, 'tcx>(cx: &LateContext<'a, 'tcx>, expr: &'tcx Expr<'tcx>) -> bool {
if_chain! {
if let ExprKind::MethodCall(method_name, _, exprs) = expr.kind;
if let ExprKind::MethodCall(method_name, _, exprs, _) = expr.kind;
if method_name.ident.as_str() == "read_to_end";
if let ExprKind::Path(QPath::Resolved(None, _)) = &exprs[0].kind;
let ty = cx.tables.expr_ty(&exprs[0]);
@ -73,7 +73,7 @@ fn is_file_read_to_end<'a, 'tcx>(cx: &LateContext<'a, 'tcx>, expr: &'tcx Expr<'t
fn is_file_read_to_string<'a, 'tcx>(cx: &LateContext<'a, 'tcx>, expr: &'tcx Expr<'tcx>) -> bool {
if_chain! {
if let ExprKind::MethodCall(method_name, _, exprs) = expr.kind;
if let ExprKind::MethodCall(method_name, _, exprs, _) = expr.kind;
if method_name.ident.as_str() == "read_to_string";
if let ExprKind::Path(QPath::Resolved(None, _)) = &exprs[0].kind;
let ty = cx.tables.expr_ty(&exprs[0]);