trivial-gray-streams

This system provides an extremely thin compatibility layer for gray streams. It is nearly too trivial for a complete package, except that I have copy&pasted this code into enough projects now that I decided to factor it out once again now, and then never have to touch it again.

How to use it

1. Use the package TRIVIAL-GRAY-STREAMS instead of whatever implementation-specific package you would have to use otherwise to get at gray stream symbols.
2. For STREAM-READ-SEQUENCE and STREAM-WRITE-SEQUENCE, notice that we use two required arguments and allow additional keyword arguments. So the lambda list when defining a method on either function should look like this: (stream sequence start end &key)
3. In order for (2) to work on all Lisps, make sure to subclass all your stream classes from TRIVIAL-GRAY-STREAM-MIXIN if you intend to define methods on those two generic functions.

Extensions

Generic function STREAM-READ-SEQUENCE (stream sequence start end &key) Generic function STREAM-WRITE-SEQUENCE (stream sequence start end &key)

    See above.

Generic function STREAM-FILE-POSITION (stream) => file position Generic function (SETF STREAM-FILE-POSITION) (position-spec stream) => successp

    Will only be called by LispWorks, CLISP and SBCL.