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class are now
automatically static, and fields are no longer allowed to be declared there. Stated
differently, all heap state must now be declared inside an explicitly declared class,
and functions and methods declared outside any class can be viewed as belonging to
the module. The motivating benefit of this change is to no longer need the 'static'
keyword when declaring a module of functions and methods.
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ultimate base type (int or real) before subtracting
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* array indices (any dimension)
* array lengths (with new, any dimension)
* sequence indicies
* subsequence bounds (like sq[lo..hi])
* the new multiplicity in multiset update (m[t := multiplicity])
* subarray-to-sequence bounds (like a[lo..hi])
Note that for an array 'a', 'a.Length' is always an integer, so a comparison 'i < a.Length' still requires 'i' to be an integer, not any integer-based value. Same for '|sq|' for a sequence 'sq'.
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Rustan Leino