mirror of https://github.com/ColorlibHQ/gentelella
102 lines
4.5 KiB
JavaScript
102 lines
4.5 KiB
JavaScript
// Copyright (C) 2009 Google Inc.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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/**
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* @fileoverview
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* Registers a language handler for Haskell.
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*
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*
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* To use, include prettify.js and this file in your HTML page.
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* Then put your code in an HTML tag like
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* <pre class="prettyprint lang-hs">(my lisp code)</pre>
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* The lang-cl class identifies the language as common lisp.
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* This file supports the following language extensions:
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* lang-cl - Common Lisp
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* lang-el - Emacs Lisp
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* lang-lisp - Lisp
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* lang-scm - Scheme
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*
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*
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* I used http://www.informatik.uni-freiburg.de/~thiemann/haskell/haskell98-report-html/syntax-iso.html
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* as the basis, but ignore the way the ncomment production nests since this
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* makes the lexical grammar irregular. It might be possible to support
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* ncomments using the lookbehind filter.
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*
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*
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* @author mikesamuel@gmail.com
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*/
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PR['registerLangHandler'](
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PR['createSimpleLexer'](
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[
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// Whitespace
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// whitechar -> newline | vertab | space | tab | uniWhite
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// newline -> return linefeed | return | linefeed | formfeed
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[PR['PR_PLAIN'], /^[\t\n\x0B\x0C\r ]+/, null, '\t\n\x0B\x0C\r '],
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// Single line double and single-quoted strings.
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// char -> ' (graphic<' | \> | space | escape<\&>) '
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// string -> " {graphic<" | \> | space | escape | gap}"
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// escape -> \ ( charesc | ascii | decimal | o octal
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// | x hexadecimal )
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// charesc -> a | b | f | n | r | t | v | \ | " | ' | &
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[PR['PR_STRING'], /^\"(?:[^\"\\\n\x0C\r]|\\[\s\S])*(?:\"|$)/,
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null, '"'],
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[PR['PR_STRING'], /^\'(?:[^\'\\\n\x0C\r]|\\[^&])\'?/,
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null, "'"],
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// decimal -> digit{digit}
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// octal -> octit{octit}
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// hexadecimal -> hexit{hexit}
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// integer -> decimal
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// | 0o octal | 0O octal
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// | 0x hexadecimal | 0X hexadecimal
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// float -> decimal . decimal [exponent]
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// | decimal exponent
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// exponent -> (e | E) [+ | -] decimal
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[PR['PR_LITERAL'],
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/^(?:0o[0-7]+|0x[\da-f]+|\d+(?:\.\d+)?(?:e[+\-]?\d+)?)/i,
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null, '0123456789']
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],
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[
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// Haskell does not have a regular lexical grammar due to the nested
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// ncomment.
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// comment -> dashes [ any<symbol> {any}] newline
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// ncomment -> opencom ANYseq {ncomment ANYseq}closecom
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// dashes -> '--' {'-'}
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// opencom -> '{-'
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// closecom -> '-}'
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[PR['PR_COMMENT'], /^(?:(?:--+(?:[^\r\n\x0C]*)?)|(?:\{-(?:[^-]|-+[^-\}])*-\}))/],
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// reservedid -> case | class | data | default | deriving | do
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// | else | if | import | in | infix | infixl | infixr
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// | instance | let | module | newtype | of | then
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// | type | where | _
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[PR['PR_KEYWORD'], /^(?:case|class|data|default|deriving|do|else|if|import|in|infix|infixl|infixr|instance|let|module|newtype|of|then|type|where|_)(?=[^a-zA-Z0-9\']|$)/, null],
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// qvarid -> [ modid . ] varid
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// qconid -> [ modid . ] conid
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// varid -> (small {small | large | digit | ' })<reservedid>
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// conid -> large {small | large | digit | ' }
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// modid -> conid
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// small -> ascSmall | uniSmall | _
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// ascSmall -> a | b | ... | z
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// uniSmall -> any Unicode lowercase letter
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// large -> ascLarge | uniLarge
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// ascLarge -> A | B | ... | Z
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// uniLarge -> any uppercase or titlecase Unicode letter
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[PR['PR_PLAIN'], /^(?:[A-Z][\w\']*\.)*[a-zA-Z][\w\']*/],
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// matches the symbol production
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[PR['PR_PUNCTUATION'], /^[^\t\n\x0B\x0C\r a-zA-Z0-9\'\"]+/]
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]),
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['hs']);
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