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Rollup of 4 pull requests #71352

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GuillaumeGomez and others added 10 commits April 17, 2020 18:09
…js, r=kinnison

Replace big JS dict with JSON parsing

Part of rust-lang#56545.

@ollie27 suggested that using JSON instead of a JS dict might be faster, so I decided to test it. And the results far exceeded whatever expectations I had...

I used https://github.com/adamgreig/stm32ral for my tests. If you want to build it locally:

```bash
$ cargo doc --features doc --open
```

But I strongly recommend to do it with this PR. Some numbers:

 * Loading a page with the JSON search-index: less than 1 second
 * Loading a page with the JS search-index: crashed after 30 seconds

I think the results are clear enough...

r? @ollie27

cc @rust-lang/rustdoc
fix -Zast-json to output correct JSON form

fixes rust-lang#71086 (Reverts some of the changes made in rust-lang#70215)

JSON output (from an empty library) after fix has something for **"id"** field
```shell
lonelyjoe@lonelyjoe-desktop:~/workspace/empty_lib/src$ rustc lib.rs -Zast-json
```
```json
{
   "module":{
      "inner":{
         "lo":0,
         "hi":94
      },
      "items":[
         {
            "attrs":[
               {
                  "kind":{
                     "variant":"Normal",
                     "fields":[
                        {
                           "path":{
                              "span":{
                                 "lo":0,
                                 "hi":0
                              },
                              "segments":[
                                 {
                                    "ident":{
                                       "name":"prelude_import",
                                       "span":{
                                          "lo":0,
                                          "hi":0
                                       }
                                    },
                                    "id":3,
                                    "args":null
                                 }
                              ]
                           },
                           "args":"Empty"
                        }
                     ]
                  },
                  "id":null,
                  "style":"Outer",
                  "span":{
                     "lo":0,
                     "hi":0
                  }
               }
            ],
            "id":4,
            "span":{
               "lo":0,
               "hi":0
            },
            "vis":{
               "node":"Inherited",
               "span":{
                  "lo":0,
                  "hi":0
               }
            },
            "ident":{
               "name":"",
               "span":{
                  "lo":0,
                  "hi":0
               }
            },
            "kind":{
               "variant":"Use",
               "fields":[
                  {
                     "prefix":{
                        "span":{
                           "lo":0,
                           "hi":0
                        },
                        "segments":[
                           {
                              "ident":{
                                 "name":"{{root}}",
                                 "span":{
                                    "lo":0,
                                    "hi":0
                                 }
                              },
                              "id":5,
                              "args":null
                           },
                           {
                              "ident":{
                                 "name":"std",
                                 "span":{
                                    "lo":0,
                                    "hi":0
                                 }
                              },
                              "id":6,
                              "args":null
                           },
                           {
                              "ident":{
                                 "name":"prelude",
                                 "span":{
                                    "lo":0,
                                    "hi":0
                                 }
                              },
                              "id":7,
                              "args":null
                           },
                           {
                              "ident":{
                                 "name":"v1",
                                 "span":{
                                    "lo":0,
                                    "hi":0
                                 }
                              },
                              "id":8,
                              "args":null
                           }
                        ]
                     },
                     "kind":"Glob",
                     "span":{
                        "lo":0,
                        "hi":0
                     }
                  }
               ]
            },
            "tokens":null
         },
         {
            "attrs":[
               {
                  "kind":{
                     "variant":"Normal",
                     "fields":[
                        {
                           "path":{
                              "span":{
                                 "lo":0,
                                 "hi":0
                              },
                              "segments":[
                                 {
                                    "ident":{
                                       "name":"macro_use",
                                       "span":{
                                          "lo":0,
                                          "hi":0
                                       }
                                    },
                                    "id":9,
                                    "args":null
                                 }
                              ]
                           },
                           "args":"Empty"
                        }
                     ]
                  },
                  "id":null,
                  "style":"Outer",
                  "span":{
                     "lo":0,
                     "hi":0
                  }
               }
            ],
            "id":10,
            "span":{
               "lo":0,
               "hi":0
            },
            "vis":{
               "node":"Inherited",
               "span":{
                  "lo":0,
                  "hi":0
               }
            },
            "ident":{
               "name":"std",
               "span":{
                  "lo":0,
                  "hi":0
               }
            },
            "kind":{
               "variant":"ExternCrate",
               "fields":[
                  null
               ]
            },
            "tokens":null
         }
      ],
      "inline":true
   },
   "attrs":[

   ],
   "span":{
      "lo":0,
      "hi":94
   },
   "proc_macros":[

   ]
}
```
…apacity, r=sfackler

Stabilize PathBuf capacity methods

Closes rust-lang#58234.

Stabilization FCP finished in rust-lang#58234 (comment).
Update pattern docs.

A few changes to help clarify string pattern usage:

* Add some examples and stability information in the `pattern` module.
* Fixes the links at https://doc.rust-lang.org/std/str/pattern/ because intra-doc-links don't work with re-exported modules (rust-lang#65983 I think?).
* Consistently use the same phrasing for `str` methods taking a pattern.
    * Also mention that array of `char` is also accepted.

When `Pattern` is stabilized, the phrasing in the `str` methods can be updated to be more general to reflect the exact behavior. I'm reluctant to do this now because the stability story for `Pattern` is uncertain. It may perhaps look something like:

> The pattern can be any type that implements the [`Pattern`] trait. Notable examples are `&str`, [`char`], arrays of [`char`], or functions or closures that determines if a character matches. Additional libraries might provide more complex patterns like regular expressions.

This is complicated because methods like `trim_matches` have bounds, which for example don't support `str`, so those methods may need more elaboration.
@Dylan-DPC-zz
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@bors r+ rollup=never p=4

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bors commented Apr 20, 2020

📌 Commit db64e00 has been approved by Dylan-DPC

@bors bors added the S-waiting-on-bors Status: Waiting on bors to run and complete tests. Bors will change the label on completion. label Apr 20, 2020
@Dylan-DPC-zz Dylan-DPC-zz added the rollup A PR which is a rollup label Apr 20, 2020
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bors commented Apr 20, 2020

⌛ Testing commit db64e00 with merge fc0e789bb35248bad6699838eb3519e3e41fa008...

@Dylan-DPC-zz
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@bors r-

@bors bors added S-waiting-on-author Status: This is awaiting some action (such as code changes or more information) from the author. and removed S-waiting-on-bors Status: Waiting on bors to run and complete tests. Bors will change the label on completion. labels Apr 20, 2020
@Dylan-DPC-zz Dylan-DPC-zz deleted the rollup-3pu3i4u branch April 20, 2020 15:53
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7 participants