Re: chaining splitters

[Baz via Digitalmars-d-learn]

On Wednesday, 11 March 2015 at 00:00:39 UTC, dnoob wrote:
Hello,
I am parsing some text and I have the following;

string text = "some very long text";

foreach(line; splitter(text, [13, 10]))
{
        foreach(record; splitter(line, '*'))
        {
                foreach(field; splitter(record, '='))
                {
                        foreach(value; splitter(field, ','))
                        {
                                // do something...
                        }
                }
        }
}

I know there is a better way to do that but I'm a total D noob.

Thanks!

For this kind of things i tend to write a small lexer because you 
have a good control on what to do where to do it and the finally 
the pattern is quite simple:
---
// empty/front/popFront for build-in arrays
import std.array;

string identifier;
while (!text.empty)
{
  auto current = text.front;
  //
  // test whites/memorize identifier/resetidentifier
  // test punctuation/reset identifier...
  // test keywords/reset identifier...
  identifier ~= current;
  text.popFront;
}
---