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Dafny counts from 0, but Boogie counts from 1. Tokens are 1-based. Thus when we
print tokens, we need to decrement the column number. This was done for resolver
errors, but not for verification or parsing errors. In addition, parsing errors
were inconsistent with resolution errors case-wise.
Unfortunately, the fix affects the output of many tests.
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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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now created by the parser into the system module.
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Clément Pit--Claudel
Rustan Leino