reprism/src/languages/nim.js

Modular Syntax highlighting for the web

export default {
  language: 'nim',
  init: Prism => {
    Prism.languages.nim = {
      comment: /#.*/,
      // Double-quoted strings can be prefixed by an identifier (Generalized raw string literals)
      // Character literals are handled specifically to prevent issues with numeric type suffixes
      string: {
        pattern: /(?:(?:\b(?!\d)(?:\w|\\x[8-9a-fA-F][0-9a-fA-F])+)?(?:"""[\s\S]*?"""(?!")|"(?:\\[\s\S]|""|[^"\\])*")|'(?:\\(?:\d+|x[\da-fA-F]{2}|.)|[^'])')/,
        greedy: true,
      },
      // The negative look ahead prevents wrong highlighting of the .. operator
      number: /\b(?:0[xXoObB][\da-fA-F_]+|\d[\d_]*(?:(?!\.\.)\.[\d_]*)?(?:[eE][+-]?\d[\d_]*)?)(?:'?[iuf]\d*)?/,
      keyword: /\b(?:addr|as|asm|atomic|bind|block|break|case|cast|concept|const|continue|converter|defer|discard|distinct|do|elif|else|end|enum|except|export|finally|for|from|func|generic|if|import|include|interface|iterator|let|macro|method|mixin|nil|object|out|proc|ptr|raise|ref|return|static|template|try|tuple|type|using|var|when|while|with|without|yield)\b/,
      function: {
        pattern: /(?:(?!\d)(?:\w|\\x[8-9a-fA-F][0-9a-fA-F])+|`[^`\r\n]+`)\*?(?:\[[^\]]+\])?(?=\s*\()/,
        inside: {
          operator: /\*$/,
        },
      },
      // We don't want to highlight operators inside backticks
      ignore: {
        pattern: /`[^`\r\n]+`/,
        inside: {
          punctuation: /`/,
        },
      },
      operator: {
        // Look behind and look ahead prevent wrong highlighting of punctuations [. .] {. .} (. .)
        // but allow the slice operator .. to take precedence over them
        // One can define his own operators in Nim so all combination of operators might be an operator.
        pattern: /(^|[({\[](?=\.\.)|(?![({\[]\.).)(?:(?:[=+\-*\/<>@$~&%|!?^:\\]|\.\.|\.(?![)}\]]))+|\b(?:and|div|of|or|in|is|isnot|mod|not|notin|shl|shr|xor)\b)/m,
        lookbehind: true,
      },
      punctuation: /[({\[]\.|\.[)}\]]|[`(){}\[\],:]/,
    }
  },
}