reprism/src/languages/eiffel.js

Modular Syntax highlighting for the web

export default {
  language: 'eiffel',
  init: Prism => {
    Prism.languages.eiffel = {
      comment: /--.*/,
      string: [
        // Aligned-verbatim-strings
        {
          pattern: /"([^[]*)\[[\s\S]*?\]\1"/,
          greedy: true,
        },
        // Non-aligned-verbatim-strings
        {
          pattern: /"([^{]*)\{[\s\S]*?\}\1"/,
          greedy: true,
        },
        // Single-line string
        {
          pattern: /"(?:%\s+%|%.|[^%"\r\n])*"/,
          greedy: true,
        },
      ],
      // normal char | special char | char code
      char: /'(?:%.|[^%'\r\n])+'/,
      keyword: /\b(?:across|agent|alias|all|and|attached|as|assign|attribute|check|class|convert|create|Current|debug|deferred|detachable|do|else|elseif|end|ensure|expanded|export|external|feature|from|frozen|if|implies|inherit|inspect|invariant|like|local|loop|not|note|obsolete|old|once|or|Precursor|redefine|rename|require|rescue|Result|retry|select|separate|some|then|undefine|until|variant|Void|when|xor)\b/i,
      boolean: /\b(?:True|False)\b/i,
      // Convention: class-names are always all upper-case characters
      'class-name': {
        pattern: /\b[A-Z][\dA-Z_]*\b/,
        alias: 'builtin',
      },
      number: [
        // hexa | octal | bin
        /\b0[xcb][\da-f](?:_*[\da-f])*\b/i,
        // Decimal
        /(?:\d(?:_*\d)*)?\.(?:(?:\d(?:_*\d)*)?e[+-]?)?\d(?:_*\d)*|\d(?:_*\d)*\.?/i,
      ],
      punctuation: /:=|<<|>>|\(\||\|\)|->|\.(?=\w)|[{}[\];(),:?]/,
      operator: /\\\\|\|\.\.\||\.\.|\/[~\/=]?|[><]=?|[-+*^=~]/,
    }
  },
}