Auto merge of #51581 - GuillaumeGomez:keyword-doc, r=QuietMisdreavus

Keyword doc

Part of #51451.

r? @QuietMisdreavus

Author: bors

src/librustdoc/html/static/main.js

@@ -465,6 +465,10 @@
                             var res = buildHrefAndPath(obj);
                             obj.displayPath = pathSplitter(res[0]);
                             obj.fullPath = obj.displayPath + obj.name;
+                            if (obj.ty === TY_KEYWORD) {
+                                // To be sure than it isn't considered as duplicate with items.
+                                obj.fullPath += '|k';
+                            }
                             obj.href = res[1];
                             out.push(obj);
                             if (out.length >= MAX_RESULTS) {
@@ -781,7 +785,7 @@
                     case "fn":
                         return (name == "method" || name == "tymethod");
                     case "type":
-                        return (name == "primitive");
+                        return (name == "primitive" || name == "keyword");
                 }
 
                 // No match

src/libstd/keyword_docs.rs

@@ -0,0 +1,28 @@
+// Copyright 2015 The Rust Project Developers. See the COPYRIGHT
+// file at the top-level directory of this distribution and at
+// http://rust-lang.org/COPYRIGHT.
+//
+// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
+// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
+// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
+// option. This file may not be copied, modified, or distributed
+// except according to those terms.
+
+#[doc(keyword = "fn")]
+//
+/// The `fn` keyword.
+///
+/// The `fn` keyword is used to declare a function.
+///
+/// Example:
+///
+/// ```rust
+/// fn some_function() {
+///     // code goes in here
+/// }
+/// ```
+///
+/// For more information about functions, take a look at the [Rust Book][book].
+///
+/// [book]: https://doc.rust-lang.org/book/second-edition/ch03-03-how-functions-work.html
+mod fn_keyword { }

src/libstd/lib.rs

@@ -547,3 +547,8 @@ pub use stdsimd::arch;
 // the rustdoc documentation for primitive types. Using `include!`
 // because rustdoc only looks for these modules at the crate level.
 include!("primitive_docs.rs");
+
+// Include a number of private modules that exist solely to provide
+// the rustdoc documentation for the existing keywords. Using `include!`
+// because rustdoc only looks for these modules at the crate level.
+include!("keyword_docs.rs");

src/test/rustdoc-js/keyword.js

@@ -0,0 +1,20 @@
+// Copyright 2018 The Rust Project Developers. See the COPYRIGHT
+// file at the top-level directory of this distribution and at
+// http://rust-lang.org/COPYRIGHT.
+//
+// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
+// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
+// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
+// option. This file may not be copied, modified, or distributed
+// except according to those terms.
+
+// ignore-order
+
+const QUERY = 'fn';
+
+const EXPECTED = {
+    'others': [
+        { 'path': 'std', 'name': 'fn', ty: 15 }, // 15 is for primitive types
+        { 'path': 'std', 'name': 'fn', ty: 21 }, // 21 is for keywords
+    ],
+};

src/test/rustdoc-js/should-fail.js

@@ -0,0 +1,19 @@
+// Copyright 2018 The Rust Project Developers. See the COPYRIGHT
+// file at the top-level directory of this distribution and at
+// http://rust-lang.org/COPYRIGHT.
+//
+// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
+// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
+// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
+// option. This file may not be copied, modified, or distributed
+// except according to those terms.
+
+// should-fail
+
+const QUERY = 'fn';
+
+const EXPECTED = {
+    'others': [
+        { 'path': 'std', 'name': 'fn', ty: 14 },
+    ],
+};

src/tools/rustdoc-js/tester.js

@@ -164,6 +164,7 @@ function loadContent(content) {
     m._compile(content, "tmp.js");
     m.exports.ignore_order = content.indexOf("\n// ignore-order\n") !== -1;
     m.exports.exact_check = content.indexOf("\n// exact-check\n") !== -1;
+    m.exports.should_fail = content.indexOf("\n// should-fail\n") !== -1;
     return m.exports;
 }
 
@@ -259,6 +260,7 @@ function main(argv) {
         const query = loadedFile.QUERY;
         const ignore_order = loadedFile.ignore_order;
         const exact_check = loadedFile.exact_check;
+        const should_fail = loadedFile.should_fail;
         var results = loaded.execSearch(loaded.getQuery(query), index);
         process.stdout.write('Checking "' + file + '" ... ');
         var error_text = [];
@@ -289,7 +291,11 @@ function main(argv) {
                 }
             }
         }
-        if (error_text.length !== 0) {
+        if (error_text.length === 0 && should_fail === true) {
+            errors += 1;
+            console.error("FAILED");
+            console.error("==> Test was supposed to fail but all items were found...");
+        } else if (error_text.length !== 0 && should_fail === false) {
             errors += 1;
             console.error("FAILED");
             console.error(error_text.join("\n"));