Function group

packages/printer/src/internal/doc.ts:381–405

(self: Doc.Doc<A>)

/** @internal */
export const group = <A>(self: Doc.Doc<A>): Doc.Doc<A> => {
  switch (self._tag) {
    case "FlatAlt": {
      const flattened = changesUponFlattening(self.right)
      switch (flattened._tag) {
        case "Flattened": {
          return union(flattened.value, self.left)
        }
        case "AlreadyFlat": {
          return union(self.right, self.left)
        }
        case "NeverFlat": {
          return self.left
        }
      }
    }
    case "Union": {
      return self
    }
    default: {
      const flattened = changesUponFlattening(self)
      return InternalFlatten.isFlattened(flattened) ? union(flattened.value, self) : self
    }
  }
}

// -----------------------------------------------------------------------------
// Reactive Layouts