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| 1 // Copyright (C) 2013 Andrew Allen | |
| 2 // | |
| 3 // Licensed under the Apache License, Version 2.0 (the "License"); | |
| 4 // you may not use this file except in compliance with the License. | |
| 5 // You may obtain a copy of the License at | |
| 6 // | |
| 7 // http://www.apache.org/licenses/LICENSE-2.0 | |
| 8 // | |
| 9 // Unless required by applicable law or agreed to in writing, software | |
| 10 // distributed under the License is distributed on an "AS IS" BASIS, | |
| 11 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | |
| 12 // See the License for the specific language governing permissions and | |
| 13 // limitations under the License. | |
| 14 | |
| 15 | |
| 16 /** | |
| 17 * @fileoverview | |
| 18 * Registers a language handler for Erlang. | |
| 19 * | |
| 20 * Derived from https://raw.github.com/erlang/otp/dev/lib/compiler/src/core_pars
e.yrl | |
| 21 * Modified from Mike Samuel's Haskell plugin for google-code-prettify | |
| 22 * | |
| 23 * @author achew22@gmail.com | |
| 24 */ | |
| 25 | |
| 26 PR['registerLangHandler']( | |
| 27 PR['createSimpleLexer']( | |
| 28 [ | |
| 29 // Whitespace | |
| 30 // whitechar -> newline | vertab | space | tab | uniWhite | |
| 31 // newline -> return linefeed | return | linefeed | formfeed | |
| 32 [PR['PR_PLAIN'], /^[\t\n\x0B\x0C\r ]+/, null, '\t\n\x0B\x0C\r '], | |
| 33 // Single line double-quoted strings. | |
| 34 [PR['PR_STRING'], /^\"(?:[^\"\\\n\x0C\r]|\\[\s\S])*(?:\"|$)/, | |
| 35 null, '"'], | |
| 36 | |
| 37 // Handle atoms | |
| 38 [PR['PR_LITERAL'], /^[a-z][a-zA-Z0-9_]*/], | |
| 39 // Handle single quoted atoms | |
| 40 [PR['PR_LITERAL'], /^\'(?:[^\'\\\n\x0C\r]|\\[^&])+\'?/, | |
| 41 null, "'"], | |
| 42 | |
| 43 // Handle macros. Just to be extra clear on this one, it detects the ? | |
| 44 // then uses the regexp to end it so be very careful about matching | |
| 45 // all the terminal elements | |
| 46 [PR['PR_LITERAL'], /^\?[^ \t\n({]+/, null, "?"], | |
| 47 | |
| 48 | |
| 49 | |
| 50 // decimal -> digit{digit} | |
| 51 // octal -> octit{octit} | |
| 52 // hexadecimal -> hexit{hexit} | |
| 53 // integer -> decimal | |
| 54 // | 0o octal | 0O octal | |
| 55 // | 0x hexadecimal | 0X hexadecimal | |
| 56 // float -> decimal . decimal [exponent] | |
| 57 // | decimal exponent | |
| 58 // exponent -> (e | E) [+ | -] decimal | |
| 59 [PR['PR_LITERAL'], | |
| 60 /^(?:0o[0-7]+|0x[\da-f]+|\d+(?:\.\d+)?(?:e[+\-]?\d+)?)/i, | |
| 61 null, '0123456789'] | |
| 62 ], | |
| 63 [ | |
| 64 // TODO: catch @declarations inside comments | |
| 65 | |
| 66 // Comments in erlang are started with % and go till a newline | |
| 67 [PR['PR_COMMENT'], /^%[^\n]*/], | |
| 68 | |
| 69 // Catch macros | |
| 70 //[PR['PR_TAG'], /?[^( \n)]+/], | |
| 71 | |
| 72 /** | |
| 73 * %% Keywords (atoms are assumed to always be single-quoted). | |
| 74 * 'module' 'attributes' 'do' 'let' 'in' 'letrec' | |
| 75 * 'apply' 'call' 'primop' | |
| 76 * 'case' 'of' 'end' 'when' 'fun' 'try' 'catch' 'receive' 'after' | |
| 77 */ | |
| 78 [PR['PR_KEYWORD'], /^(?:module|attributes|do|let|in|letrec|apply|call|p
rimop|case|of|end|when|fun|try|catch|receive|after|char|integer|float,atom,strin
g,var)\b/], | |
| 79 | |
| 80 /** | |
| 81 * Catch definitions (usually defined at the top of the file) | |
| 82 * Anything that starts -something | |
| 83 */ | |
| 84 [PR['PR_KEYWORD'], /^-[a-z_]+/], | |
| 85 | |
| 86 // Catch variables | |
| 87 [PR['PR_TYPE'], /^[A-Z_][a-zA-Z0-9_]*/], | |
| 88 | |
| 89 // matches the symbol production | |
| 90 [PR['PR_PUNCTUATION'], /^[.,;]/] | |
| 91 ]), | |
| 92 ['erlang', 'erl']); | |
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