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

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+/*
+Language: Erlang
+Description: Erlang is a general-purpose functional language, with strict evaluation, single assignment, and dynamic typing.
+Author: Nikolay Zakharov <nikolay.desh@gmail.com>, Dmitry Kovega <arhibot@gmail.com>
+Website: https://www.erlang.org
+Category: functional
+*/
+
+/** @type LanguageFn */
+function erlang(hljs) {
+  const BASIC_ATOM_RE = '[a-z\'][a-zA-Z0-9_\']*';
+  const FUNCTION_NAME_RE = '(' + BASIC_ATOM_RE + ':' + BASIC_ATOM_RE + '|' + BASIC_ATOM_RE + ')';
+  const ERLANG_RESERVED = {
+    keyword:
+      'after and andalso|10 band begin bnot bor bsl bzr bxor case catch cond div end fun if '
+      + 'let not of orelse|10 query receive rem try when xor maybe else',
+    literal:
+      'false true'
+  };
+
+  const COMMENT = hljs.COMMENT('%', '$');
+  const NUMBER = {
+    className: 'number',
+    begin: '\\b(\\d+(_\\d+)*#[a-fA-F0-9]+(_[a-fA-F0-9]+)*|\\d+(_\\d+)*(\\.\\d+(_\\d+)*)?([eE][-+]?\\d+)?)',
+    relevance: 0
+  };
+  const NAMED_FUN = { begin: 'fun\\s+' + BASIC_ATOM_RE + '/\\d+' };
+  const FUNCTION_CALL = {
+    begin: FUNCTION_NAME_RE + '\\(',
+    end: '\\)',
+    returnBegin: true,
+    relevance: 0,
+    contains: [
+      {
+        begin: FUNCTION_NAME_RE,
+        relevance: 0
+      },
+      {
+        begin: '\\(',
+        end: '\\)',
+        endsWithParent: true,
+        returnEnd: true,
+        relevance: 0
+        // "contains" defined later
+      }
+    ]
+  };
+  const TUPLE = {
+    begin: /\{/,
+    end: /\}/,
+    relevance: 0
+    // "contains" defined later
+  };
+  const VAR1 = {
+    begin: '\\b_([A-Z][A-Za-z0-9_]*)?',
+    relevance: 0
+  };
+  const VAR2 = {
+    begin: '[A-Z][a-zA-Z0-9_]*',
+    relevance: 0
+  };
+  const RECORD_ACCESS = {
+    begin: '#' + hljs.UNDERSCORE_IDENT_RE,
+    relevance: 0,
+    returnBegin: true,
+    contains: [
+      {
+        begin: '#' + hljs.UNDERSCORE_IDENT_RE,
+        relevance: 0
+      },
+      {
+        begin: /\{/,
+        end: /\}/,
+        relevance: 0
+        // "contains" defined later
+      }
+    ]
+  };
+  const CHAR_LITERAL = {
+    scope: 'string',
+    match: /\$(\\([^0-9]|[0-9]{1,3}|)|.)/,
+  };
+  const TRIPLE_QUOTE = {
+    scope: 'string',
+    match: /"""("*)(?!")[\s\S]*?"""\1/,
+  };
+
+  const SIGIL = {
+    scope: 'string',
+    contains: [ hljs.BACKSLASH_ESCAPE ],
+    variants: [
+      {match: /~\w?"""("*)(?!")[\s\S]*?"""\1/},
+      {begin: /~\w?\(/, end: /\)/},
+      {begin: /~\w?\[/, end: /\]/},
+      {begin: /~\w?{/, end: /}/},
+      {begin: /~\w?</, end: />/},
+      {begin: /~\w?\//, end: /\//},
+      {begin: /~\w?\|/, end: /\|/},
+      {begin: /~\w?'/, end: /'/},
+      {begin: /~\w?"/, end: /"/},
+      {begin: /~\w?`/, end: /`/},
+      {begin: /~\w?#/, end: /#/},
+    ],
+  };
+
+  const BLOCK_STATEMENTS = {
+    beginKeywords: 'fun receive if try case maybe',
+    end: 'end',
+    keywords: ERLANG_RESERVED
+  };
+  BLOCK_STATEMENTS.contains = [
+    COMMENT,
+    NAMED_FUN,
+    hljs.inherit(hljs.APOS_STRING_MODE, { className: '' }),
+    BLOCK_STATEMENTS,
+    FUNCTION_CALL,
+    SIGIL,
+    TRIPLE_QUOTE,
+    hljs.QUOTE_STRING_MODE,
+    NUMBER,
+    TUPLE,
+    VAR1,
+    VAR2,
+    RECORD_ACCESS,
+    CHAR_LITERAL
+  ];
+
+  const BASIC_MODES = [
+    COMMENT,
+    NAMED_FUN,
+    BLOCK_STATEMENTS,
+    FUNCTION_CALL,
+    SIGIL,
+    TRIPLE_QUOTE,
+    hljs.QUOTE_STRING_MODE,
+    NUMBER,
+    TUPLE,
+    VAR1,
+    VAR2,
+    RECORD_ACCESS,
+    CHAR_LITERAL
+  ];
+  FUNCTION_CALL.contains[1].contains = BASIC_MODES;
+  TUPLE.contains = BASIC_MODES;
+  RECORD_ACCESS.contains[1].contains = BASIC_MODES;
+
+  const DIRECTIVES = [
+    "-module",
+    "-record",
+    "-undef",
+    "-export",
+    "-ifdef",
+    "-ifndef",
+    "-author",
+    "-copyright",
+    "-doc",
+    "-moduledoc",
+    "-vsn",
+    "-import",
+    "-include",
+    "-include_lib",
+    "-compile",
+    "-define",
+    "-else",
+    "-endif",
+    "-file",
+    "-behaviour",
+    "-behavior",
+    "-spec",
+    "-on_load",
+    "-nifs",
+  ];
+
+  const PARAMS = {
+    className: 'params',
+    begin: '\\(',
+    end: '\\)',
+    contains: BASIC_MODES
+  };
+
+  return {
+    name: 'Erlang',
+    aliases: [ 'erl' ],
+    keywords: ERLANG_RESERVED,
+    illegal: '(</|\\*=|\\+=|-=|/\\*|\\*/|\\(\\*|\\*\\))',
+    contains: [
+      {
+        className: 'function',
+        begin: '^' + BASIC_ATOM_RE + '\\s*\\(',
+        end: '->',
+        returnBegin: true,
+        illegal: '\\(|#|//|/\\*|\\\\|:|;',
+        contains: [
+          PARAMS,
+          hljs.inherit(hljs.TITLE_MODE, { begin: BASIC_ATOM_RE })
+        ],
+        starts: {
+          end: ';|\\.',
+          keywords: ERLANG_RESERVED,
+          contains: BASIC_MODES
+        }
+      },
+      COMMENT,
+      {
+        begin: '^-',
+        end: '\\.',
+        relevance: 0,
+        excludeEnd: true,
+        returnBegin: true,
+        keywords: {
+          $pattern: '-' + hljs.IDENT_RE,
+          keyword: DIRECTIVES.map(x => `${x}|1.5`).join(" ")
+        },
+        contains: [
+          PARAMS,
+          SIGIL,
+          TRIPLE_QUOTE,
+          hljs.QUOTE_STRING_MODE
+        ]
+      },
+      NUMBER,
+      SIGIL,
+      TRIPLE_QUOTE,
+      hljs.QUOTE_STRING_MODE,
+      RECORD_ACCESS,
+      VAR1,
+      VAR2,
+      TUPLE,
+      CHAR_LITERAL,
+      { begin: /\.$/ } // relevance booster
+    ]
+  };
+}
+
+export { erlang as default };