src/tools/rustfmt/tests/source/closure.rs

   1 // rustfmt-normalize_comments: true
   2 // Closures
   3
   4 fn main() {
   5     let square = ( |i:  i32 | i  *  i );
   6
   7     let commented = |/* first */ a /*argument*/, /* second*/ b: WithType /* argument*/, /* ignored */ _ |
   8         (aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa, bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb);
   9
  10     let block_body = move   |xxxxxxxxxxxxxxxxxxxxxxxxxxxxx,  ref  yyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyy| {
  11             xxxxxxxxxxxxxxxxxxxxxxxxxxxxx + yyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyy
  12         };
  13
  14     let loooooooooooooong_name = |field| {
  15              // format comments.
  16              if field.node.attrs.len() > 0 { field.node.attrs[0].span.lo()
  17              } else {
  18                  field.span.lo()
  19              }};
  20
  21     let unblock_me = |trivial| {
  22                          closure()
  23                      };
  24
  25     let empty = |arg|    {};
  26
  27     let simple = |arg| { /*  comment formatting */ foo(arg) };
  28
  29     let test = |  | { do_something(); do_something_else(); };
  30
  31     let arg_test = |big_argument_name, test123| looooooooooooooooooong_function_naaaaaaaaaaaaaaaaame();
  32
  33     let arg_test = |big_argument_name, test123| {looooooooooooooooooong_function_naaaaaaaaaaaaaaaaame()};
  34
  35     let simple_closure = move ||   ->  () {};
  36
  37     let closure = |input: Ty| -> Option<String> {
  38         foo()
  39     };
  40
  41     let closure_with_return_type = |aaaaaaaaaaaaaaaaaaaaaaarg1, aaaaaaaaaaaaaaaaaaaaaaarg2| -> Strong { "sup".to_owned() };
  42
  43     |arg1, arg2, _, _, arg3, arg4| { let temp = arg4 + arg3;
  44                                      arg2 * arg1 - temp };
  45
  46     let block_body_with_comment = args.iter()
  47         .map(|a| {
  48             // Emitting only dep-info is possible only for final crate type, as
  49             // as others may emit required metadata for dependent crate types
  50             if a.starts_with("--emit") && is_final_crate_type && !self.workspace_mode {
  51                 "--emit=dep-info"
  52             } else { a }
  53         });
  54 }
  55
  56 fn issue311() {
  57     let func = |x| println!("{}", x);
  58
  59     (func)(0.0);
  60 }
  61
  62 fn issue863() {
  63     let closure = |x| match x {
  64         0 => true,
  65         _ => false,
  66     } == true;
  67 }
  68
  69 fn issue934() {
  70     let hash: &Fn(&&Block) -> u64 = &|block| -> u64 {
  71         let mut h = SpanlessHash::new(cx);
  72         h.hash_block(block);
  73         h.finish()
  74     };
  75
  76     let hash: &Fn(&&Block) -> u64 = &|block| -> u64 {
  77         let mut h = SpanlessHash::new(cx);
  78         h.hash_block(block);
  79         h.finish();
  80     };
  81 }
  82
  83 impl<'a, 'tcx: 'a> SpanlessEq<'a, 'tcx> {
  84     pub fn eq_expr(&self, left: &Expr, right: &Expr) -> bool {
  85         match (&left.node, &right.node) {
  86             (&ExprBinary(l_op, ref ll, ref lr), &ExprBinary(r_op, ref rl, ref rr)) => {
  87                 l_op.node == r_op.node && self.eq_expr(ll, rl) && self.eq_expr(lr, rr) ||
  88                 swap_binop(l_op.node, ll, lr).map_or(false, |(l_op, ll, lr)| l_op == r_op.node && self.eq_expr(ll, rl) && self.eq_expr(lr, rr))
  89             }
  90         }
  91     }
  92 }
  93
  94 fn foo() {
  95     lifetimes_iter___map(|lasdfasfd| {
  96         let hi = if l.bounds.is_empty() {
  97             l.lifetime.span.hi()
  98         };
  99     });
 100 }
 101
 102 fn issue1405() {
 103     open_raw_fd(fd, b'r')
 104         .and_then(|file| Capture::new_raw(None, |_, err| unsafe {
 105             raw::pcap_fopen_offline(file, err)
 106         }));
 107 }
 108
 109 fn issue1466() {
 110     let vertex_buffer = frame.scope(|ctx| {
 111         let buffer =
 112             ctx.create_host_visible_buffer::<VertexBuffer<Vertex>>(&vertices);
 113         ctx.create_device_local_buffer(buffer)
 114     });
 115 }
 116
 117 fn issue470() {
 118     {{{
 119         let explicit_arg_decls =
 120             explicit_arguments.into_iter()
 121             .enumerate()
 122             .map(|(index, (ty, pattern))| {
 123                 let lvalue = Lvalue::Arg(index as u32);
 124                 block = this.pattern(block,
 125                                      argument_extent,
 126                                      hair::PatternRef::Hair(pattern),
 127                                      &lvalue);
 128                 ArgDecl { ty: ty }
 129             });
 130     }}}
 131 }
 132
 133 // #1509
 134 impl Foo {
 135     pub fn bar(&self) {
 136         Some(SomeType {
 137             push_closure_out_to_100_chars: iter(otherwise_it_works_ok.into_iter().map(|f| {
 138                 Ok(f)
 139             })),
 140         })
 141     }
 142 }
 143
 144 fn issue1329() {
 145     aaaaaaaaaaaaaaaa.map(|x| {
 146         x += 1;
 147         x
 148     })
 149         .filter
 150 }
 151
 152 fn issue325() {
 153     let f = || unsafe { xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx };
 154 }
 155
 156 fn issue1697() {
 157     Test.func_a(A_VERY_LONG_CONST_VARIABLE_NAME, move |arg1, arg2, arg3, arg4| arg1 + arg2 + arg3 + arg4)
 158 }
 159
 160 fn issue1694() {
 161     foooooo(|_referencefffffffff: _, _target_reference: _, _oid: _, _target_oid: _| format!("refs/pull/{}/merge", pr_id))
 162 }
 163
 164 fn issue1713() {
 165     rayon::join(
 166         || recurse(left, is_less, pred, limit),
 167         || recurse(right, is_less, Some(pivot), limit),
 168     );
 169
 170     rayon::join(
 171         1,
 172         || recurse(left, is_less, pred, limit),
 173         2,
 174         || recurse(right, is_less, Some(pivot), limit),
 175     );
 176 }
 177
 178 fn issue2063() {
 179     |ctx: Ctx<(String, String)>| -> io::Result<Response> {
 180         Ok(Response::new().with_body(ctx.params.0))
 181     }
 182 }
 183
 184 fn issue1524() {
 185     let f = |x| {{{{x}}}};
 186     let f = |x| {{{x}}};
 187     let f = |x| {{x}};
 188     let f = |x| {x};
 189     let f = |x| x;
 190 }
 191
 192 fn issue2171() {
 193     foo(|| unsafe {
 194         if PERIPHERALS {
 195             loop {}
 196         } else {
 197             PERIPHERALS = true;
 198         }
 199     })
 200 }
 201
 202 fn issue2207() {
 203     a.map(|_| unsafe {
 204         a_very_very_very_very_very_very_very_long_function_name_or_anything_else()
 205     }.to_string())
 206 }
 207
 208 fn issue2262() {
 209     result.init(&mut result.slave.borrow_mut(), &mut (result.strategy)()).map_err(|factory| Error {
 210         factory,
 211         slave: None,
 212     })?;
 213 }