1/**
2 * @license
3 * Copyright (C) 2014 Paulo Moura
4 *
5 * Licensed under the Apache License, Version 2.0 (the "License");
6 * you may not use this file except in compliance with the License.
7 * You may obtain a copy of the License at
8 *
9 *    http://www.apache.org/licenses/LICENSE-2.0
10 *
11 * Unless required by applicable law or agreed to in writing, software
12 * distributed under the License is distributed on an "AS IS" BASIS,
13 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14 * See the License for the specific language governing permissions and
15 * limitations under the License.
16 */
17
18/**
19 * @fileoverview
20 * Registers a language handler for Logtalk.
21 * http://logtalk.org/
22 * @author Paulo Moura
23 */
24
25PR['registerLangHandler'](
26    PR['createSimpleLexer'](
27        [
28          // double-quoted strings.
29          [PR['PR_STRING'], /^\"(?:[^\"\\\n\x0C\r]|\\[\s\S])*(?:\"|$)/, null, '"'],
30          // atoms (don't break on underscores!)
31          [PR['PR_LITERAL'], /^[a-z][a-zA-Z0-9_]*/],
32          // quoted atoms
33          [PR['PR_LITERAL'], /^\'(?:[^\'\\\n\x0C\r]|\\[^&])+\'?/, null, "'"],
34          // numbers
35          [PR['PR_LITERAL'], /^(?:0'.|0b[0-1]+|0o[0-7]+|0x[\da-f]+|\d+(?:\.\d+)?(?:e[+\-]?\d+)?)/i, null, '0123456789']
36        ],
37        [
38          // single-line comments begin with %
39          [PR['PR_COMMENT'], /^%[^\r\n]*/, null, '%'],
40          // block comments are delimited by /* and */
41          [PR['PR_COMMENT'], /^\/\*[\s\S]*?\*\//],
42          // directives
43          [PR['PR_KEYWORD'], /^\s*:-\s(c(a(lls|tegory)|oinductive)|p(ublic|r(ot(ocol|ected)|ivate))|e(l(if|se)|n(coding|sure_loaded)|xport)|i(f|n(clude|itialization|fo))|alias|d(ynamic|iscontiguous)|m(eta_(non_terminal|predicate)|od(e|ule)|ultifile)|reexport|s(et_(logtalk|prolog)_flag|ynchronized)|o(bject|p)|use(s|_module))/],
44          [PR['PR_KEYWORD'], /^\s*:-\s(e(lse|nd(if|_(category|object|protocol)))|built_in|dynamic|synchronized|threaded)/],
45          // variables
46          [PR['PR_TYPE'], /^[A-Z_][a-zA-Z0-9_]*/],
47          // operators
48          [PR['PR_PUNCTUATION'], /^[.,;{}:^<>=\\/+*?#!-]/]
49        ]),
50    ['logtalk', 'lgt']);
51