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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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operator on datatypes
Dafny: allow the well-formedness check of a function's specification to know that the function, on the current arguments, returns a value of the declared result type
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body-less functions/methods
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previously was an alternative syntax
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* started rewriting parsing of qualified identifiers in expressions
* annoyingly, had to introduce AST nodes for concrete syntax
* previous syntax for invoking datatype constructors: #List.Cons(h, t)
new syntax: List.Cons(h, t)
or, if only one datatype has a constructor named Cons: Cons(h, t)
* Removed type parameters for datatype constructors from the grammar
* Helped Test/VSI-Benchmarks/b4.dfy along with a couple of assertions (previously, its proving performance was highly varied)
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* added missing error checking for ghost-vs-physical contexts (e.g., use of the "old" keyword)
* check that arrays are not null when accessed
* added dafny1/FindZero.dfy test case
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qunyanm
Rustan Leino