New result format

[VovanR]

See: https://github.com/bem/bem-tools#options-5
See: https://github.com/bem/bem-tools/blob/support/0.10.x/tests/decl.js

Variant 1

{
  name: 'block',
  mod: {
    name: '',
    val: '',
    sep: ''
  },
  elem: {
    name: 'elem',
    mod: {
      name: 'mod-name',
      val: 'mod-value',
      sep: '_'
    }
  }
}

[VovanR]

Variant 2

{
  block: {
    name: '',
    mod: {
      name: '',
      val: '',
      sep: ''
    }
  },
  elem: {
    name: '',
    mod: {
      name: '',
      val: '',
      sep: ''
    }
  }
}

[VovanR]

Empty props as null?

Input: block_mod
Output:

{
  block: {
    name: 'block',
    mod: {
      name: 'mod',
      val: null,
      sep: '_'
    },
    elem: null
  }
}

Or

{
  block: {
    name: 'block',
    mod: {
      name: 'mod',
      sep: '_'
    }
  }
}

[VovanR]

Variant 2 is better. Because we can use name to store full className