regex2.d

import std.file, std.regex, std.stdio;

void main(string[] args)
{
  if (args.length != 2)
    return;

  auto text = readText(args[1]);

  enum common = `((?:func|for|if|else)[^{\n]*)\n`;
  text = replaceAll(text, ctRegex!(common ~ `\t*\{`      ), "$1 {\n"      );
  text = replaceAll(text, ctRegex!(common ~ `([^\n]+)\n` ), "$1 {\n$2 }\n");
  text = replaceAll(text, ctRegex!(         `\}(\s+)else`), "$1} else"    );

  write(text);
}