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  • Simon Marlow's avatar
    [project @ 2005-06-21 10:44:37 by simonmar] · 0c53bd0e
    Simon Marlow authored
    Relax the restrictions on conflicting packages.  This should address
    many of the traps that people have been falling into with the current
    package story.
    
    Now, a local module can shadow a module in an exposed package, as long
    as the package is not otherwise required by the program.  GHC checks
    for conflicts when it knows the dependencies of the module being
    compiled.
    
    Also, we now check for module conflicts in exposed packages only when
    importing a module: if an import can be satisfied from multiple
    packages, that's an error.  It's not possible to prevent GHC from
    starting by installing packages now (unless you install another base
    package).
    
    It seems to be possible to confuse GHCi by having a local module
    shadowing a package module that goes away and comes back again.  I
    think it's nearly right, but strange happenings have been observed.
    
    I'll try to merge this into the STABLE branch.
    0c53bd0e