 21 Sep, 2017 1 commit


Robbert Krebbers authored
This allows for more control over `Hint Mode`.

 17 Sep, 2017 1 commit


Robbert Krebbers authored
This provides significant robustness against looping type class search. As a consequence, at many places throughout the library we had to add additional typing information to lemmas. This was to be expected, since most of the old lemmas were ambiguous. For example: Section fin_collection. Context `{FinCollection A C}. size_singleton (x : A) : size {[ x ]} = 1. In this case, the lemma does not tell us which `FinCollection` with elements `A` we are talking about. So, `{[ x ]}` could not only refer to the singleton operation of the `FinCollection A C` in the section, but also to any other `FinCollection` in the development. To make this lemma unambigious, it should be written as: Lemma size_singleton (x : A) : size ({[ x ]} : C) = 1. In similar spirit, lemmas like the one below were also ambiguous: Lemma lookup_alter_None {A} (f : A → A) m i j : alter f i m !! j = None
↔ m !! j = None. It is not clear which finite map implementation we are talking about. To make this lemma unambigious, it should be written as: Lemma lookup_alter_None {A} (f : A → A) (m : M A) i j : alter f i m !! j = None↔ m !! j = None. That is, we have to specify the type of `m`.

 08 Sep, 2017 1 commit


Robbert Krebbers authored
See also Coq bug #5712.

 15 Mar, 2017 1 commit


Robbert Krebbers authored

 31 Jan, 2017 2 commits


Robbert Krebbers authored

Ralf Jung authored
This patch was created using find name *.v  xargs L 1 awk i inplace '{from = 0} /^From/{ from = 1; ever_from = 1} { if (from == 0 && seen == 0 && ever_from == 1) { print "Set Default Proof Using \"Type*\"."; seen = 1 } }1 ' and some minor manual editing

 20 Sep, 2016 1 commit


Robbert Krebbers authored

 27 Jul, 2016 2 commits


Robbert Krebbers authored
This reverts commit 20b4ae55bdf00edb751ccdab3eb876cb9b13c99f, which does not seem to work with Coq 8.5pl2 (I accidentally tested with 8.5pl1).

Robbert Krebbers authored
This makes type checking more directed, and somewhat more predictable. On the downside, it makes it impossible to declare the singleton on lists as an instance of SingletonM and the insert and alter operations on functions as instances of Alter and Insert. However, these were not used often anyway.

 22 Jul, 2016 2 commits


Robbert Krebbers authored

Robbert Krebbers authored
There was not really a need for the lattice type classes, so I removed these.

 17 Feb, 2016 2 commits


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.

 21 Dec, 2015 1 commit


Robbert Krebbers authored

 16 Nov, 2015 1 commit


Robbert Krebbers authored

 01 Feb, 2017 1 commit


Robbert Krebbers authored
The port makes the following notable changes: * The carrier types of separation algebras and integer environments are no longer in Set. Now they have a type at a fixed type level above Set. This both works better in 8.5 and makes the formalization more general. I have tried putting them at polymorphic type levels, but that increased the compilation time by an order of magnitude. * I am using a custom f_equal tactic written in Ltac to circumvent bug #4069. That bug has been fixed, so this custom tactic can be removed when the next beta of 8.5 is out.

 25 Feb, 2015 1 commit


Robbert Krebbers authored

 08 Feb, 2015 1 commit


Robbert Krebbers authored

 10 Jul, 2014 1 commit


Robbert Krebbers authored

 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
Major changes: * A data structure to collect locked addresses in memory. * Operations to lock and unlock addresses. * Remove [ctree_Forall] and express it using [Forall] and [ctree_flatten]. This saves a lot of lines of code. * Add a [void] value. This value cannot be typed, but will be used as a dummy return value for functions with return type [void]. Minor changes: * Various deciders in preparation of the executable semantics. * Improve naming and notations. * Remove obsolete stuff.

 02 May, 2014 1 commit


Robbert Krebbers authored

 17 Jun, 2013 1 commit


Robbert Krebbers authored

 15 May, 2013 1 commit


Robbert Krebbers authored

 07 May, 2013 1 commit


Robbert Krebbers authored
The refactoring includes: * Use infix notations for the various list relations * More consistent naming * Put lemmas on one line whenever possible * Change proofs into oneliners when possible * Make better use of the "Implicit Types" command * Improve the order of the list module by placing all definitions at the start, then the proofs, and finally the tactics. Besides, there is some new machinery for proofs by reflection on lists. It is used for a decision procedure for permutations and list containment.

 22 Feb, 2013 1 commit


Robbert Krebbers authored

 19 Feb, 2013 1 commit


Robbert Krebbers authored
Both the operational and axiomatic semantics are extended with sequence points and a permission system based on fractional permissions. In order to achieve this, the memory model has been completely revised, and is now built on top of an abstract interface for permissions. Apart from these changed, the library on lists and sets has been heavily extended, and minor changed have been made to other parts of the prelude.
