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// Copyright (C) 2012 Jeffrey Arnold
//
// 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
* Support for R documentation (Rd) files
*
* Minimal highlighting or Rd files, basically just highlighting
* macros. It does not try to identify verbatim or R-like regions of
* macros as that is too complicated for a lexer. Descriptions of the
* Rd format can be found
* http://cran.r-project.org/doc/manuals/R-exts.html and
* http://developer.r-project.org/parseRd.pdf.
*
* @author Jeffrey Arnold
*/
PR['registerLangHandler'](
PR['createSimpleLexer'](
[
// whitespace
[PR['PR_PLAIN'], /^[\t\n\r \xA0]+/, null, '\t\n\r \xA0'],
// all comments begin with '%'
[PR['PR_COMMENT'], /^%[^\r\n]*/, null, '%']
],
[// special macros with no args
[PR['PR_LITERAL'], /^\\(?:cr|l?dots|R|tab)\b/],
// macros
[PR['PR_KEYWORD'], /^\\[a-zA-Z@]+/],
// highlighted as macros, since technically they are
[PR['PR_KEYWORD'], /^#(?:ifn?def|endif)/ ],
// catch escaped brackets
[PR['PR_PLAIN'], /^\\[{}]/],
// punctuation
[PR['PR_PUNCTUATION'], /^[{}()\[\]]+/]
]),
['Rd', 'rd']);