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Filename : rust.js
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'use strict'

module.exports = rust
rust.displayName = 'rust'
rust.aliases = []
function rust(Prism) {
  ;(function (Prism) {
    var multilineComment = /\/\*(?:[^*/]|\*(?!\/)|\/(?!\*)|<self>)*\*\//.source
    for (var i = 0; i < 2; i++) {
      // support 4 levels of nested comments
      multilineComment = multilineComment.replace(/<self>/g, function () {
        return multilineComment
      })
    }
    multilineComment = multilineComment.replace(/<self>/g, function () {
      return /[^\s\S]/.source
    })
    Prism.languages.rust = {
      comment: [
        {
          pattern: RegExp(/(^|[^\\])/.source + multilineComment),
          lookbehind: true,
          greedy: true
        },
        {
          pattern: /(^|[^\\:])\/\/.*/,
          lookbehind: true,
          greedy: true
        }
      ],
      string: {
        pattern: /b?"(?:\\[\s\S]|[^\\"])*"|b?r(#*)"(?:[^"]|"(?!\1))*"\1/,
        greedy: true
      },
      char: {
        pattern:
          /b?'(?:\\(?:x[0-7][\da-fA-F]|u\{(?:[\da-fA-F]_*){1,6}\}|.)|[^\\\r\n\t'])'/,
        greedy: true
      },
      attribute: {
        pattern: /#!?\[(?:[^\[\]"]|"(?:\\[\s\S]|[^\\"])*")*\]/,
        greedy: true,
        alias: 'attr-name',
        inside: {
          string: null // see below
        }
      },
      // Closure params should not be confused with bitwise OR |
      'closure-params': {
        pattern: /([=(,:]\s*|\bmove\s*)\|[^|]*\||\|[^|]*\|(?=\s*(?:\{|->))/,
        lookbehind: true,
        greedy: true,
        inside: {
          'closure-punctuation': {
            pattern: /^\||\|$/,
            alias: 'punctuation'
          },
          rest: null // see below
        }
      },
      'lifetime-annotation': {
        pattern: /'\w+/,
        alias: 'symbol'
      },
      'fragment-specifier': {
        pattern: /(\$\w+:)[a-z]+/,
        lookbehind: true,
        alias: 'punctuation'
      },
      variable: /\$\w+/,
      'function-definition': {
        pattern: /(\bfn\s+)\w+/,
        lookbehind: true,
        alias: 'function'
      },
      'type-definition': {
        pattern: /(\b(?:enum|struct|trait|type|union)\s+)\w+/,
        lookbehind: true,
        alias: 'class-name'
      },
      'module-declaration': [
        {
          pattern: /(\b(?:crate|mod)\s+)[a-z][a-z_\d]*/,
          lookbehind: true,
          alias: 'namespace'
        },
        {
          pattern:
            /(\b(?:crate|self|super)\s*)::\s*[a-z][a-z_\d]*\b(?:\s*::(?:\s*[a-z][a-z_\d]*\s*::)*)?/,
          lookbehind: true,
          alias: 'namespace',
          inside: {
            punctuation: /::/
          }
        }
      ],
      keyword: [
        // https://github.com/rust-lang/reference/blob/master/src/keywords.md
        /\b(?:Self|abstract|as|async|await|become|box|break|const|continue|crate|do|dyn|else|enum|extern|final|fn|for|if|impl|in|let|loop|macro|match|mod|move|mut|override|priv|pub|ref|return|self|static|struct|super|trait|try|type|typeof|union|unsafe|unsized|use|virtual|where|while|yield)\b/, // primitives and str
        // https://doc.rust-lang.org/stable/rust-by-example/primitives.html
        /\b(?:bool|char|f(?:32|64)|[ui](?:8|16|32|64|128|size)|str)\b/
      ],
      // functions can technically start with an upper-case letter, but this will introduce a lot of false positives
      // and Rust's naming conventions recommend snake_case anyway.
      // https://doc.rust-lang.org/1.0.0/style/style/naming/README.html
      function: /\b[a-z_]\w*(?=\s*(?:::\s*<|\())/,
      macro: {
        pattern: /\b\w+!/,
        alias: 'property'
      },
      constant: /\b[A-Z_][A-Z_\d]+\b/,
      'class-name': /\b[A-Z]\w*\b/,
      namespace: {
        pattern: /(?:\b[a-z][a-z_\d]*\s*::\s*)*\b[a-z][a-z_\d]*\s*::(?!\s*<)/,
        inside: {
          punctuation: /::/
        }
      },
      // Hex, oct, bin, dec numbers with visual separators and type suffix
      number:
        /\b(?:0x[\dA-Fa-f](?:_?[\dA-Fa-f])*|0o[0-7](?:_?[0-7])*|0b[01](?:_?[01])*|(?:(?:\d(?:_?\d)*)?\.)?\d(?:_?\d)*(?:[Ee][+-]?\d+)?)(?:_?(?:f32|f64|[iu](?:8|16|32|64|size)?))?\b/,
      boolean: /\b(?:false|true)\b/,
      punctuation: /->|\.\.=|\.{1,3}|::|[{}[\];(),:]/,
      operator: /[-+*\/%!^]=?|=[=>]?|&[&=]?|\|[|=]?|<<?=?|>>?=?|[@?]/
    }
    Prism.languages.rust['closure-params'].inside.rest = Prism.languages.rust
    Prism.languages.rust['attribute'].inside['string'] =
      Prism.languages.rust['string']
  })(Prism)
}