• Rob Pike's avatar
    gob: allow exchange of interface values · 5d906469
    Rob Pike authored
    The implemetation describes each value as a string identifying the
    concrete type of the value, followed by the usual encoding of that
    value.  All types to be exchanged as contents of interface values
    must be registered ahead of time with the new Register function.
    Although this would not seem strictly necessary, the linker garbage
    collects unused types so without some mechanism to guarantee
    the type exists in the binary, there could be unpleasant surprises.
    Moreover, the receiver needs a reflect.Type of the value to be
    written in order to be able to save the data. A Register function
    seems necessary.
    
    The implementation may require defining types in the middle of
    of sending a value.  The old code never did this. Therefore there
    has been some refactoring to make the encoder and decoder
    work recursively.
    
    This change changes the internal type IDs. Existing gob archives
    will break with this change.  Apologies for that. If this is a deal
    breaker it should be possible to create a conversion tool.
    
    Error handling is too complicated in this code. A subsequent
    change should clean it up.
    
    R=rsc
    CC=golang-dev
    https://golang.org/cl/2618042
    5d906469
doc.go 12.4 KB