es2-code-prettify
Version:
Google Code Prettify for ES2
95 lines (81 loc) • 3.74 kB
JavaScript
/**
* @license
* Copyright (C) 2013 Andrew Allen
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
/**
* @fileoverview
* Registers a language handler for Erlang.
*
* Derived from https://raw.github.com/erlang/otp/dev/lib/compiler/src/core_parse.yrl
* Modified from Mike Samuel's Haskell plugin for google-code-prettify
*
* @author achew22@gmail.com
*/
registerLangHandler(
createSimpleLexer(
[
// Whitespace
// whitechar -> newline | vertab | space | tab | uniWhite
// newline -> return linefeed | return | linefeed | formfeed
[PR_PLAIN, RegExpProxy( "^[\\t\\n\\x0B\\x0C\\r ]+" ), null, '\t\n\x0B\x0C\r '],
// Single line double-quoted strings.
[PR_STRING, RegExpProxy( "^\\\"(?:[^\\\"\\\\\\n\\x0C\\r]|\\\\[\\s\\S])*(?:\\\"|$)" ),
null, '"'],
// Handle atoms
[PR_LITERAL, RegExpProxy( "^[a-z][a-zA-Z0-9_]*" )],
// Handle single quoted atoms
[PR_LITERAL, RegExpProxy( "^\\'(?:[^\\'\\\\\\n\\x0C\\r]|\\\\[^&])+\\'?" ),
null, "'"],
// Handle macros. Just to be extra clear on this one, it detects the ?
// then uses the regexp to end it so be very careful about matching
// all the terminal elements
[PR_LITERAL, RegExpProxy( "^\\?[^ \\t\\n({]+" ), null, "?"],
// decimal -> digit{digit}
// octal -> octit{octit}
// hexadecimal -> hexit{hexit}
// integer -> decimal
// | 0o octal | 0O octal
// | 0x hexadecimal | 0X hexadecimal
// float -> decimal . decimal [exponent]
// | decimal exponent
// exponent -> (e | E) [+ | -] decimal
[PR_LITERAL,
RegExpProxy( "^(?:0o[0-7]+|0x[\\da-f]+|\\d+(?:\\.\\d+)?(?:e[+\\-]?\\d+)?)", 'i' ),
null, '0123456789']
],
[
// TODO: catch @declarations inside comments
// Comments in erlang are started with % and go till a newline
[PR_COMMENT, RegExpProxy( "^%[^\\n]*" )],
// Catch macros
//[PR_TAG, /?[^( \n)]+/],
/**
* %% Keywords (atoms are assumed to always be single-quoted).
* 'module' 'attributes' 'do' 'let' 'in' 'letrec'
* 'apply' 'call' 'primop'
* 'case' 'of' 'end' 'when' 'fun' 'try' 'catch' 'receive' 'after'
*/
[PR_KEYWORD, RegExpProxy( "^(?:module|attributes|do|let|in|letrec|apply|call|primop|case|of|end|when|fun|try|catch|receive|after|char|integer|float,atom,string,var)\\b" )],
/**
* Catch definitions (usually defined at the top of the file)
* Anything that starts -something
*/
[PR_KEYWORD, RegExpProxy( "^-[a-z_]+" )],
// Catch variables
[PR_TYPE, RegExpProxy( "^[A-Z_][a-zA-Z0-9_]*" )],
// matches the symbol production
[PR_PUNCTUATION, RegExpProxy( "^[.,;]" )]
]),
['erlang', 'erl']);