submodules: update clippy from d8e6e4c to 1ff81c1

Changes:
````
rustup rust-lang/rust#69968
Fix documentation generation for configurable lints
Fix single binding in closure
Improvement: Don't show function body in needless_lifetimes
````

Author: matthiaskrgr

clippy_lints/src/doc.rs

@@ -234,8 +234,8 @@ fn lint_for_missing_headers<'a, 'tcx>(
                 if implements_trait(cx, ret_ty, future, &[]);
                 if let ty::Opaque(_, subs) = ret_ty.kind;
                 if let Some(gen) = subs.types().next();
-                if let ty::Generator(def_id, subs, _) = gen.kind;
-                if match_type(cx, subs.as_generator().return_ty(def_id, cx.tcx), &paths::RESULT);
+                if let ty::Generator(_, subs, _) = gen.kind;
+                if match_type(cx, subs.as_generator().return_ty(), &paths::RESULT);
                 then {
                     span_lint(
                         cx,

clippy_lints/src/lifetimes.rs

@@ -169,7 +169,7 @@ fn check_fn_inner<'a, 'tcx>(
         span_lint(
             cx,
             NEEDLESS_LIFETIMES,
-            span,
+            span.with_hi(decl.output.span().hi()),
             "explicit lifetimes given in parameter types where they could be elided \
              (or replaced with `'_` if needed by type declaration)",
         );

clippy_lints/src/matches.rs

@@ -3,9 +3,10 @@ use crate::utils::paths;
 use crate::utils::sugg::Sugg;
 use crate::utils::usage::is_unused;
 use crate::utils::{
-    expr_block, get_arg_name, in_macro, indent_of, is_allowed, is_expn_of, is_refutable, is_wild, match_qpath,
-    match_type, match_var, multispan_sugg, remove_blocks, snippet, snippet_block, snippet_with_applicability,
-    span_lint_and_help, span_lint_and_note, span_lint_and_sugg, span_lint_and_then, walk_ptrs_ty,
+    expr_block, get_arg_name, get_parent_expr, in_macro, indent_of, is_allowed, is_expn_of, is_refutable, is_wild,
+    match_qpath, match_type, match_var, multispan_sugg, remove_blocks, snippet, snippet_block,
+    snippet_with_applicability, span_lint_and_help, span_lint_and_note, span_lint_and_sugg, span_lint_and_then,
+    walk_ptrs_ty,
 };
 use if_chain::if_chain;
 use rustc::lint::in_external_macro;
@@ -928,14 +929,27 @@ fn check_match_single_binding<'a>(cx: &LateContext<'_, 'a>, ex: &Expr<'a>, arms:
                     ),
                 )
             } else {
+                // If we are in closure, we need curly braces around suggestion
+                let mut indent = " ".repeat(indent_of(cx, ex.span).unwrap_or(0));
+                let (mut cbrace_start, mut cbrace_end) = ("".to_string(), "".to_string());
+                if let Some(parent_expr) = get_parent_expr(cx, expr) {
+                    if let ExprKind::Closure(..) = parent_expr.kind {
+                        cbrace_end = format!("\n{}}}", indent);
+                        // Fix body indent due to the closure
+                        indent = " ".repeat(indent_of(cx, bind_names).unwrap_or(0));
+                        cbrace_start = format!("{{\n{}", indent);
+                    }
+                };
                 (
                     expr.span,
                     format!(
-                        "let {} = {};\n{}{}",
+                        "{}let {} = {};\n{}{}{}",
+                        cbrace_start,
                         snippet_with_applicability(cx, bind_names, "..", &mut applicability),
                         snippet_with_applicability(cx, matched_vars, "..", &mut applicability),
-                        " ".repeat(indent_of(cx, expr.span).unwrap_or(0)),
-                        snippet_body
+                        indent,
+                        snippet_body,
+                        cbrace_end
                     ),
                 )
             };

tests/ui/issue_4266.stderr

@@ -2,17 +2,15 @@ error: explicit lifetimes given in parameter types where they could be elided (o
   --> $DIR/issue_4266.rs:4:1
    |
 LL | async fn sink1<'a>(_: &'a str) {} // lint
-   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
    |
    = note: `-D clippy::needless-lifetimes` implied by `-D warnings`
 
 error: explicit lifetimes given in parameter types where they could be elided (or replaced with `'_` if needed by type declaration)
   --> $DIR/issue_4266.rs:8:1
    |
-LL | / async fn one_to_one<'a>(s: &'a str) -> &'a str {
-LL | |     s
-LL | | }
-   | |_^
+LL | async fn one_to_one<'a>(s: &'a str) -> &'a str {
+   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
 
 error: aborting due to 2 previous errors
 

tests/ui/match_single_binding.fixed

@@ -67,4 +67,14 @@ fn main() {
     // Lint
     let Point { x, y } = coords();
     let product = x * y;
+    // Lint
+    let v = vec![Some(1), Some(2), Some(3), Some(4)];
+    #[allow(clippy::let_and_return)]
+    let _ = v
+        .iter()
+        .map(|i| {
+            let unwrapped = i.unwrap();
+            unwrapped
+        })
+        .collect::<Vec<u8>>();
 }

tests/ui/match_single_binding.rs

@@ -80,4 +80,13 @@ fn main() {
     let product = match coords() {
         Point { x, y } => x * y,
     };
+    // Lint
+    let v = vec![Some(1), Some(2), Some(3), Some(4)];
+    #[allow(clippy::let_and_return)]
+    let _ = v
+        .iter()
+        .map(|i| match i.unwrap() {
+            unwrapped => unwrapped,
+        })
+        .collect::<Vec<u8>>();
 }

tests/ui/match_single_binding.stderr

@@ -150,5 +150,22 @@ LL |     let Point { x, y } = coords();
 LL |     let product = x * y;
    |
 
-error: aborting due to 10 previous errors
+error: this match could be written as a `let` statement
+  --> $DIR/match_single_binding.rs:88:18
+   |
+LL |           .map(|i| match i.unwrap() {
+   |  __________________^
+LL | |             unwrapped => unwrapped,
+LL | |         })
+   | |_________^
+   |
+help: consider using `let` statement
+   |
+LL |         .map(|i| {
+LL |             let unwrapped = i.unwrap();
+LL |             unwrapped
+LL |         })
+   |
+
+error: aborting due to 11 previous errors
 

tests/ui/needless_lifetimes.stderr

@@ -2,133 +2,105 @@ error: explicit lifetimes given in parameter types where they could be elided (o
   --> $DIR/needless_lifetimes.rs:4:1
    |
 LL | fn distinct_lifetimes<'a, 'b>(_x: &'a u8, _y: &'b u8, _z: u8) {}
-   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
    |
    = note: `-D clippy::needless-lifetimes` implied by `-D warnings`
 
 error: explicit lifetimes given in parameter types where they could be elided (or replaced with `'_` if needed by type declaration)
   --> $DIR/needless_lifetimes.rs:6:1
    |
 LL | fn distinct_and_static<'a, 'b>(_x: &'a u8, _y: &'b u8, _z: &'static u8) {}
-   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
 
 error: explicit lifetimes given in parameter types where they could be elided (or replaced with `'_` if needed by type declaration)
   --> $DIR/needless_lifetimes.rs:16:1
    |
-LL | / fn in_and_out<'a>(x: &'a u8, _y: u8) -> &'a u8 {
-LL | |     x
-LL | | }
-   | |_^
+LL | fn in_and_out<'a>(x: &'a u8, _y: u8) -> &'a u8 {
+   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
 
 error: explicit lifetimes given in parameter types where they could be elided (or replaced with `'_` if needed by type declaration)
   --> $DIR/needless_lifetimes.rs:45:1
    |
-LL | / fn deep_reference_3<'a>(x: &'a u8, _y: u8) -> Result<&'a u8, ()> {
-LL | |     Ok(x)
-LL | | }
-   | |_^
+LL | fn deep_reference_3<'a>(x: &'a u8, _y: u8) -> Result<&'a u8, ()> {
+   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
 
 error: explicit lifetimes given in parameter types where they could be elided (or replaced with `'_` if needed by type declaration)
   --> $DIR/needless_lifetimes.rs:50:1
    |
-LL | / fn where_clause_without_lt<'a, T>(x: &'a u8, _y: u8) -> Result<&'a u8, ()>
-LL | | where
-LL | |     T: Copy,
-LL | | {
-LL | |     Ok(x)
-LL | | }
-   | |_^
+LL | fn where_clause_without_lt<'a, T>(x: &'a u8, _y: u8) -> Result<&'a u8, ()>
+   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
 
 error: explicit lifetimes given in parameter types where they could be elided (or replaced with `'_` if needed by type declaration)
   --> $DIR/needless_lifetimes.rs:62:1
    |
 LL | fn lifetime_param_2<'a, 'b>(_x: Ref<'a>, _y: &'b u8) {}
-   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
 
 error: explicit lifetimes given in parameter types where they could be elided (or replaced with `'_` if needed by type declaration)
   --> $DIR/needless_lifetimes.rs:86:1
    |
-LL | / fn fn_bound_2<'a, F, I>(_m: Lt<'a, I>, _f: F) -> Lt<'a, I>
-LL | | where
-LL | |     for<'x> F: Fn(Lt<'x, I>) -> Lt<'x, I>,
-LL | | {
-LL | |     unreachable!()
-LL | | }
-   | |_^
+LL | fn fn_bound_2<'a, F, I>(_m: Lt<'a, I>, _f: F) -> Lt<'a, I>
+   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
 
 error: explicit lifetimes given in parameter types where they could be elided (or replaced with `'_` if needed by type declaration)
   --> $DIR/needless_lifetimes.rs:120:5
    |
-LL | /     fn self_and_out<'s>(&'s self) -> &'s u8 {
-LL | |         &self.x
-LL | |     }
-   | |_____^
+LL |     fn self_and_out<'s>(&'s self) -> &'s u8 {
+   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
 
 error: explicit lifetimes given in parameter types where they could be elided (or replaced with `'_` if needed by type declaration)
   --> $DIR/needless_lifetimes.rs:129:5
    |
 LL |     fn distinct_self_and_in<'s, 't>(&'s self, _x: &'t u8) {}
-   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
 
 error: explicit lifetimes given in parameter types where they could be elided (or replaced with `'_` if needed by type declaration)
   --> $DIR/needless_lifetimes.rs:148:1
    |
-LL | / fn struct_with_lt<'a>(_foo: Foo<'a>) -> &'a str {
-LL | |     unimplemented!()
-LL | | }
-   | |_^
+LL | fn struct_with_lt<'a>(_foo: Foo<'a>) -> &'a str {
+   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
 
 error: explicit lifetimes given in parameter types where they could be elided (or replaced with `'_` if needed by type declaration)
   --> $DIR/needless_lifetimes.rs:178:1
    |
-LL | / fn trait_obj_elided2<'a>(_arg: &'a dyn Drop) -> &'a str {
-LL | |     unimplemented!()
-LL | | }
-   | |_^
+LL | fn trait_obj_elided2<'a>(_arg: &'a dyn Drop) -> &'a str {
+   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
 
 error: explicit lifetimes given in parameter types where they could be elided (or replaced with `'_` if needed by type declaration)
   --> $DIR/needless_lifetimes.rs:184:1
    |
-LL | / fn alias_with_lt<'a>(_foo: FooAlias<'a>) -> &'a str {
-LL | |     unimplemented!()
-LL | | }
-   | |_^
+LL | fn alias_with_lt<'a>(_foo: FooAlias<'a>) -> &'a str {
+   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
 
 error: explicit lifetimes given in parameter types where they could be elided (or replaced with `'_` if needed by type declaration)
   --> $DIR/needless_lifetimes.rs:203:1
    |
-LL | / fn named_input_elided_output<'a>(_arg: &'a str) -> &str {
-LL | |     unimplemented!()
-LL | | }
-   | |_^
+LL | fn named_input_elided_output<'a>(_arg: &'a str) -> &str {
+   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
 
 error: explicit lifetimes given in parameter types where they could be elided (or replaced with `'_` if needed by type declaration)
   --> $DIR/needless_lifetimes.rs:211:1
    |
-LL | / fn trait_bound_ok<'a, T: WithLifetime<'static>>(_: &'a u8, _: T) {
-LL | |     unimplemented!()
-LL | | }
-   | |_^
+LL | fn trait_bound_ok<'a, T: WithLifetime<'static>>(_: &'a u8, _: T) {
+   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
 
 error: explicit lifetimes given in parameter types where they could be elided (or replaced with `'_` if needed by type declaration)
   --> $DIR/needless_lifetimes.rs:247:1
    |
-LL | / fn out_return_type_lts<'a>(e: &'a str) -> Cow<'a> {
-LL | |     unimplemented!()
-LL | | }
-   | |_^
+LL | fn out_return_type_lts<'a>(e: &'a str) -> Cow<'a> {
+   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
 
 error: explicit lifetimes given in parameter types where they could be elided (or replaced with `'_` if needed by type declaration)
   --> $DIR/needless_lifetimes.rs:254:9
    |
 LL |         fn needless_lt<'a>(x: &'a u8) {}
-   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
 
 error: explicit lifetimes given in parameter types where they could be elided (or replaced with `'_` if needed by type declaration)
   --> $DIR/needless_lifetimes.rs:258:9
    |
 LL |         fn needless_lt<'a>(_x: &'a u8) {}
-   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
 
 error: aborting due to 17 previous errors
 

util/lintlib.py

@@ -14,7 +14,7 @@
 group_re = re.compile(r'''\s*([a-z_][a-z_0-9]+)''')
 conf_re = re.compile(r'''define_Conf! {\n([^}]*)\n}''', re.MULTILINE)
 confvar_re = re.compile(
-    r'''/// Lint: (\w+). (.*).*\n\s*\([^,]+,\s+"([^"]+)",\s+([^=\)]+)=>\s+(.*)\),''', re.MULTILINE)
+    r'''/// Lint: (\w+)\. (.*)\n\s*\([^,]+,\s+"([^"]+)":\s+([^,]+),\s+([^\.\)]+).*\),''', re.MULTILINE)
 comment_re = re.compile(r'''\s*/// ?(.*)''')
 
 lint_levels = {
@@ -93,7 +93,7 @@ def parse_configs(path):
     match = re.search(conf_re, contents)
     confvars = re.findall(confvar_re, match.group(1))
 
-    for (lint, doc, name, default, ty) in confvars:
+    for (lint, doc, name, ty, default) in confvars:
         configs[lint.lower()] = Config(name.replace("_", "-"), ty, doc, default)
 
     return configs