Class: SelectingReadStream

• Inheritance
• Description
• Class protocol
  • instance creation
• Instance protocol
  • instance creation
  • queries
  • reading
• Examples

Inheritance:

   Object
   |
   +--Stream
      |
      +--SelectingReadStream

Package:

stx:libbasic2

Category:

Streams-Misc

Version:

rev: 1.5 date: 2014/04/30 18:20:55

user: cg

file: SelectingReadStream.st directory: libbasic2

module: stx stc-classLibrary: libbasic2

Author:

Claus Gittinger

Description:

A stream which only delivers elements for which a select block returns true
from an underlying stream. 

Needs readAhead for proper atEnd handling.


[instance variables:]
    hasReadAhead        - because nil is a valid read-element,
                        this is used to know if readAhead is valid.

Class protocol:

 on: aStream selecting: aBlock

Instance protocol:

 on: aStream selecting: aBlock

 atEnd

 contentsSpecies

return a class of which instances will be returned, when
parts of the collection are asked for.
(see upTo-kind of methods in Stream)

 next

Examples: