refractor/lang/r.js

Lightweight, robust, elegant virtual syntax highlighting using Prism

'use strict';

module.exports = r;
r.displayName = 'r';
r.aliases = [];
function r(Prism) {
  Prism.languages.r = {
    comment: /#.*/,
    string: {
      pattern: /(['"])(?:\\.|(?!\1)[^\\\r\n])*\1/,
      greedy: true
    },
    'percent-operator': {
      // Includes user-defined operators
      // and %%, %*%, %/%, %in%, %o%, %x%
      pattern: /%[^%\s]*%/,
      alias: 'operator'
    },
    boolean: /\b(?:TRUE|FALSE)\b/,
    ellipsis: /\.\.(?:\.|\d+)/,
    number: [
      /\b(?:NaN|Inf)\b/,
      /\b(?:0x[\dA-Fa-f]+(?:\.\d*)?|\d*\.?\d+)(?:[EePp][+-]?\d+)?[iL]?\b/
    ],
    keyword: /\b(?:if|else|repeat|while|function|for|in|next|break|NULL|NA|NA_integer_|NA_real_|NA_complex_|NA_character_)\b/,
    operator: /->?>?|<(?:=|<?-)?|[>=!]=?|::?|&&?|\|\|?|[+*\/^$@~]/,
    punctuation: /[(){}\[\],;]/
  };
}