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book/node_modules/highlight.js/es/languages/rust.js

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+/*
+Language: Rust
+Author: Andrey Vlasovskikh <andrey.vlasovskikh@gmail.com>
+Contributors: Roman Shmatov <romanshmatov@gmail.com>, Kasper Andersen <kma_untrusted@protonmail.com>
+Website: https://www.rust-lang.org
+Category: common, system
+*/
+
+/** @type LanguageFn */
+
+function rust(hljs) {
+  const regex = hljs.regex;
+  // ============================================
+  // Added to support the r# keyword, which is a raw identifier in Rust.
+  const RAW_IDENTIFIER = /(r#)?/;
+  const UNDERSCORE_IDENT_RE = regex.concat(RAW_IDENTIFIER, hljs.UNDERSCORE_IDENT_RE);
+  const IDENT_RE = regex.concat(RAW_IDENTIFIER, hljs.IDENT_RE);
+  // ============================================
+  const FUNCTION_INVOKE = {
+    className: "title.function.invoke",
+    relevance: 0,
+    begin: regex.concat(
+      /\b/,
+      /(?!let|for|while|if|else|match\b)/,
+      IDENT_RE,
+      regex.lookahead(/\s*\(/))
+  };
+  const NUMBER_SUFFIX = '([ui](8|16|32|64|128|size)|f(32|64))\?';
+  const KEYWORDS = [
+    "abstract",
+    "as",
+    "async",
+    "await",
+    "become",
+    "box",
+    "break",
+    "const",
+    "continue",
+    "crate",
+    "do",
+    "dyn",
+    "else",
+    "enum",
+    "extern",
+    "false",
+    "final",
+    "fn",
+    "for",
+    "if",
+    "impl",
+    "in",
+    "let",
+    "loop",
+    "macro",
+    "match",
+    "mod",
+    "move",
+    "mut",
+    "override",
+    "priv",
+    "pub",
+    "ref",
+    "return",
+    "self",
+    "Self",
+    "static",
+    "struct",
+    "super",
+    "trait",
+    "true",
+    "try",
+    "type",
+    "typeof",
+    "union",
+    "unsafe",
+    "unsized",
+    "use",
+    "virtual",
+    "where",
+    "while",
+    "yield"
+  ];
+  const LITERALS = [
+    "true",
+    "false",
+    "Some",
+    "None",
+    "Ok",
+    "Err"
+  ];
+  const BUILTINS = [
+    // functions
+    'drop ',
+    // traits
+    "Copy",
+    "Send",
+    "Sized",
+    "Sync",
+    "Drop",
+    "Fn",
+    "FnMut",
+    "FnOnce",
+    "ToOwned",
+    "Clone",
+    "Debug",
+    "PartialEq",
+    "PartialOrd",
+    "Eq",
+    "Ord",
+    "AsRef",
+    "AsMut",
+    "Into",
+    "From",
+    "Default",
+    "Iterator",
+    "Extend",
+    "IntoIterator",
+    "DoubleEndedIterator",
+    "ExactSizeIterator",
+    "SliceConcatExt",
+    "ToString",
+    // macros
+    "assert!",
+    "assert_eq!",
+    "bitflags!",
+    "bytes!",
+    "cfg!",
+    "col!",
+    "concat!",
+    "concat_idents!",
+    "debug_assert!",
+    "debug_assert_eq!",
+    "env!",
+    "eprintln!",
+    "panic!",
+    "file!",
+    "format!",
+    "format_args!",
+    "include_bytes!",
+    "include_str!",
+    "line!",
+    "local_data_key!",
+    "module_path!",
+    "option_env!",
+    "print!",
+    "println!",
+    "select!",
+    "stringify!",
+    "try!",
+    "unimplemented!",
+    "unreachable!",
+    "vec!",
+    "write!",
+    "writeln!",
+    "macro_rules!",
+    "assert_ne!",
+    "debug_assert_ne!"
+  ];
+  const TYPES = [
+    "i8",
+    "i16",
+    "i32",
+    "i64",
+    "i128",
+    "isize",
+    "u8",
+    "u16",
+    "u32",
+    "u64",
+    "u128",
+    "usize",
+    "f32",
+    "f64",
+    "str",
+    "char",
+    "bool",
+    "Box",
+    "Option",
+    "Result",
+    "String",
+    "Vec"
+  ];
+  return {
+    name: 'Rust',
+    aliases: [ 'rs' ],
+    keywords: {
+      $pattern: hljs.IDENT_RE + '!?',
+      type: TYPES,
+      keyword: KEYWORDS,
+      literal: LITERALS,
+      built_in: BUILTINS
+    },
+    illegal: '</',
+    contains: [
+      hljs.C_LINE_COMMENT_MODE,
+      hljs.COMMENT('/\\*', '\\*/', { contains: [ 'self' ] }),
+      hljs.inherit(hljs.QUOTE_STRING_MODE, {
+        begin: /b?"/,
+        illegal: null
+      }),
+      {
+        className: 'symbol',
+        // negative lookahead to avoid matching `'`
+        begin: /'[a-zA-Z_][a-zA-Z0-9_]*(?!')/
+      },
+      {
+        scope: 'string',
+        variants: [
+          { begin: /b?r(#*)"(.|\n)*?"\1(?!#)/ },
+          {
+            begin: /b?'/,
+            end: /'/,
+            contains: [
+              {
+                scope: "char.escape",
+                match: /\\('|\w|x\w{2}|u\w{4}|U\w{8})/
+              }
+            ]
+          }
+        ]
+      },
+      {
+        className: 'number',
+        variants: [
+          { begin: '\\b0b([01_]+)' + NUMBER_SUFFIX },
+          { begin: '\\b0o([0-7_]+)' + NUMBER_SUFFIX },
+          { begin: '\\b0x([A-Fa-f0-9_]+)' + NUMBER_SUFFIX },
+          { begin: '\\b(\\d[\\d_]*(\\.[0-9_]+)?([eE][+-]?[0-9_]+)?)'
+                   + NUMBER_SUFFIX }
+        ],
+        relevance: 0
+      },
+      {
+        begin: [
+          /fn/,
+          /\s+/,
+          UNDERSCORE_IDENT_RE
+        ],
+        className: {
+          1: "keyword",
+          3: "title.function"
+        }
+      },
+      {
+        className: 'meta',
+        begin: '#!?\\[',
+        end: '\\]',
+        contains: [
+          {
+            className: 'string',
+            begin: /"/,
+            end: /"/,
+            contains: [
+              hljs.BACKSLASH_ESCAPE
+            ]
+          }
+        ]
+      },
+      {
+        begin: [
+          /let/,
+          /\s+/,
+          /(?:mut\s+)?/,
+          UNDERSCORE_IDENT_RE
+        ],
+        className: {
+          1: "keyword",
+          3: "keyword",
+          4: "variable"
+        }
+      },
+      // must come before impl/for rule later
+      {
+        begin: [
+          /for/,
+          /\s+/,
+          UNDERSCORE_IDENT_RE,
+          /\s+/,
+          /in/
+        ],
+        className: {
+          1: "keyword",
+          3: "variable",
+          5: "keyword"
+        }
+      },
+      {
+        begin: [
+          /type/,
+          /\s+/,
+          UNDERSCORE_IDENT_RE
+        ],
+        className: {
+          1: "keyword",
+          3: "title.class"
+        }
+      },
+      {
+        begin: [
+          /(?:trait|enum|struct|union|impl|for)/,
+          /\s+/,
+          UNDERSCORE_IDENT_RE
+        ],
+        className: {
+          1: "keyword",
+          3: "title.class"
+        }
+      },
+      {
+        begin: hljs.IDENT_RE + '::',
+        keywords: {
+          keyword: "Self",
+          built_in: BUILTINS,
+          type: TYPES
+        }
+      },
+      {
+        className: "punctuation",
+        begin: '->'
+      },
+      FUNCTION_INVOKE
+    ]
+  };
+}
+
+export { rust as default };