 20 Sep, 2016 1 commit


Robbert Krebbers authored

 24 Feb, 2016 1 commit


Robbert Krebbers authored
It now traverses terms at most once, whereas the setoid_rewrite approach was travering terms many times. Also, the tactic can now be extended by defining type class instances.

 19 Feb, 2016 1 commit


Robbert Krebbers authored

 17 Feb, 2016 3 commits


Robbert Krebbers authored
It is doing much more than just dealing with ∈, it solves all kinds of goals involving set operations (including ≡ and ⊆).

Robbert Krebbers authored
simplify_equality => simplify_eq simplify_equality' => simplify_eq/= simplify_map_equality => simplify_map_eq simplify_map_equality' => simplify_map_eq/= simplify_option_equality => simplify_option_eq simplify_list_equality => simplify_list_eq f_equal' => f_equal/= The /= suffixes (meaning: do simpl) are inspired by ssreflect.

Robbert Krebbers authored

 16 Feb, 2016 1 commit


Robbert Krebbers authored
The singleton maps notation is now also more consistent with the insert <[_ := _]> _ notation for maps.

 13 Feb, 2016 1 commit


Robbert Krebbers authored
Also, make our redefinition of done more robust under different orders of Importing modules.

 16 Jan, 2016 1 commit


Robbert Krebbers authored
This one (previously solve_elem_of) was hardly used. The tactic that uses naive_solver (previously esolve_elem_of, now solve_elem_of) has been extended with flags to say which hypotheses should be cleared/kept.

 12 Jan, 2016 1 commit


Robbert Krebbers authored

 21 Dec, 2015 1 commit


Robbert Krebbers authored

 16 Nov, 2015 1 commit


Robbert Krebbers authored

 11 Nov, 2015 1 commit


Robbert Krebbers authored

 15 Mar, 2015 1 commit


Robbert Krebbers authored

 08 Feb, 2015 2 commits


Robbert Krebbers authored

Robbert Krebbers authored
Important changes in the core semantics: * Types extended with function types. Since function types are a special kind of pointer types, types now have an additional mutual part called "ptr_type". * Pointers extended with function pointers. Theses are just names that refer to an actual function in the function environment. * Typing environments extended to assign argument and return types to function names. Before we used a separate environment for these, but since the argument and return types are already needed to type function pointers, this environment would appear in pretty much every typing judgment. As a sideeffect, the frontend has been rewritten entirely. The important changes are: * Type checking of expressions is more involved: there is a special kind of expression type corresponding to a function designator. * To handle things like block scoped extern function, more statefullness was needed. To prepare for future extensions, the entire frontend now uses a state monad.

 16 Jun, 2014 1 commit


Robbert Krebbers authored
Major changes: * Make void a base type, and include a proper void base value. This is necessary because expressions (free, functions without return value) can yield a void. We now also allow void casts conforming to the C standard. * Various missing lemmas about typing, weakening, decidability, ... * The operations "free" and "alloc" now operate on lvalues instead of rvalues. This removes some duplication. * Improve notations of expressions and statements. Change the presence of the operators conforming to the C standard. Small changes: * Use the classes "Typed" and "TypeCheck" for validity of indexes in memory. This gives more uniform notations. * New tactic "typed_inversion" performs inversion on an inductive predicate of type "Typed" and folds the premises. * Remove a horrible hack in the definitions of the classes "FMap", "MBind", "OMap", "Alter" that was used to let "simpl" behave better. Instead, we have defined a tactic "csimpl" that folds the results after performing an ordinary "simpl". * Fast operation to remove duplicates from lists using hashsets. * Make various type constructors (mainly finite map implementations) universe polymorphic by packing them into an inductive. This way, the whole C syntax can live in type, avoiding the need for (slow) universe checks.

 05 Jun, 2014 1 commit


Robbert Krebbers authored
