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* assign.cs (CompoundAssign): A new class used as a "flag" that
the assignment actually is happening as part of a compound
assignment operator.
During compound assignment, a few new rules exist to enable things
like:
byte b |= 1 + 2
From the spec:
x op= y can be evaluated as x = (T) (x op y) (ie, an explicit cast
to the type of x) if y is implicitly convertible to the type of x,
and the operator is a builtin operator and the return type of the
operator is explicitly convertible to the type of x.
* rootcontext.cs: Reset warning level to 2. 4 catches various
"interesting" features in mcs, we must clean this up at some
point, but currently am trying to kill other bugs ;-)
svn path=/trunk/mcs/; revision=4179
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