const highlight = (map, source) => {
  let output = source;

  output = output.replace(/("[^"]+")/g, `<span class="string">$1</span>`)

  for (let keyword of map.keywords) {
    output = output.replaceAll(keyword, `<span class="keyword">${keyword}</span>`)
  }

  for (let keyword of map.altkeywords) {
    output = output.replaceAll(keyword, `<span class="keyword-alt">${keyword}</span>`)
  }

  // TODO: predicate for function calls to be replaced
  // for (let func in map.functions) {
  //   output = output.replace(func, `<span class="function">${func}</span>`)
  // }

  output = output.replace(/(\d+)/g, `<span class="number">$1</span>`)

  return output;
}

const maps = {
  cpp: {
    keywords: [
      "auto",
      "void",
      "struct"
    ],
    altkeywords: [
      "const",
      "static",
      "int",
      "std::string",
      "std::unique_ptr",
      "char",
    ],
  }
};