==================================
New features and changes since 2.3
==================================
(1) Maude 2.4 provides an order-sorted Ax-unification algorithm for
all order-sorted theories (CSigma, E U Ax) such that:
- the signature Sigma is preregular modulo Ax;
- the axioms Ax associated to function symbols are as follows:
- there can be arbitrary function symbols and constants with
no equational attributes;
- the iter equational attribute can be declared for some unary
symbols;
- the comm or assoc comm attributes can be declared for some
binary function symbols, but then no other equational
attributes must be given for such symbols.
Explicitly excluded are theories with binary function symbols having
either: (i) the id:, left id:, or right id: attributes; or (ii) the
assoc attribute without the comm one; or (iii) a combination of (i)
and (ii).
(2) Unification is reflected in the META-LEVEL module by two descent
functions:
op metaUnify : Module UnificationProblem Nat Nat ~>
UnificationPair? [special (...)].
op metaDisjointUnify : Module UnificationProblem Nat Nat ~>
UnificationTriple? [special (...)].
(3) Statements (rule, equations and membership axioms) can now take a
print attribute. In print attribute mode, when a statement is executed
the items in its print attribute are printed, with variables taking
their value in the current substitution.
(4) Parsing of file names in the commands load, in, cd and pushd now
allows spaces using either of two syntactic conventions:
If the file name starts with " then all following characters will be
taken literally up to the terminating ", line feed or form feed.
If a file name starts with other than ", the following escape
sequences are recognized
\\ becomes \
\<space> becomes <space>
\" becomes "
(5) For operators in the C, CU, CI and CUI theories, if both arguments
are the same, the rewrite, srewrite and search commands and the model
checker will only consider one of the arguments for that step since
only one rewriting step is made per pass, the choice of argument is
irrelevant. This already happened for operators in the AC and ACU
theories. The frewrite command still always considers all arguments
even if they are identical since multiple rewriting steps can happen
in each pass.
(6) The GNU libsigsegv library is used to distinguigh between true
segmentation faults and stack overflows and so stack overflows are now
reported with an informative message.
(7) Several optimizations, bug fixes and improvements.
Overview of Changes in Maude alpha88f
=====================================
* added commutative unification
* fixed free theory instantiation bug
* fixed sort calculation of S_Theory terms bug
* fixed unification with too many variables bug
* added iter theory unification
Overview of Changes in Maude alpha88e
=====================================
* string, qid and float constants allowed in unification
* fixed unify f(X, Y) =? f(Y, X) bug
Overview of Changes in Maude alpha88d
=====================================
* set trace builtin on/off command
* state caching in strategy language
* first suppport for unification
Overview of Changes in Maude alpha88c
=====================================
* extra advisories in metalevel
* min/max operators in FLOAT
* slight change to search semantics
* metalevel projection functions now support parameterized metamodules
* fixed kind printing bug in metaPrettyPrint()
* erwrite supports limit and continue
Overview of Changes in Maude alpha88b
=====================================
* minor syntactic changes to appease gcc 4.1
* minor importation changes in prelude.maude and model-checker.maude
* fixed extension tracing bugs in search/model checker, strategy
language and metalevel
* revised/extended strategy language; cont now works with srew
* fixed trace condition bug
Overview of Changes in Maude alpha88a
=====================================
* many changes to the prelude to fix unsoundness concerns
* process based reimplementation of strategy language
* better overparsing for operator declarations
* fixed bug with views mapping to terms from FLOAT/STRING/QID
* fixed bug in AU unique collapse matcher
* fixed bug that allowed parsing of parameterized theories
* fixed upModule() bug affecting renamings
* fixed metaXmatch() kind bug introduced by alpha86 fix
* subset tests for SET and SET*
* predefined term ordering module
Overview of Changes in Maude alpha88
====================================
* fixed more sufficient completeness issues
* search command now takes a depth bound
* added metaNormalize()
* added machine ints module
Overview of Changes in Maude alpha87a
=====================================
* fixed bug in ! strategy combinator
* fixed long standing bug in look up code for assoc ops
Overview of Changes in Maude alpha87
====================================
* crude first version of strategy language
Overview of Changes in Maude 2.2 (alpha86e)
===========================================
* fixed long standing metalevel prec bug
Overview of Changes in Maude alpha86d2
======================================
* reorganized metalevel list sorts to fix sufficient completeness
problem
Overview of Changes in Maude alpha86d
=====================================
* fixed stale pointer bug in view reevaluation
* minor fixes to prelude.maude
* fixed uninitialized format attribute bug
* fixed parameter theory module expression memory leak
* fixed polymorph identity memory leak
* fixed polymorph identity processing bug
* added and used QID-SET fmod
* fixed metamodule cache deletion bug
* sortLeq and lesserSort now work on types
Overview of Changes in Maude alpha86c
=====================================
* improved recovery from surface syntax errors
* added DEFAULT fth, various views and ARRAY fmod
* added LIST-AND-SET fmod
* added linear Diophantine solver
* warn about object level duplicate attributes
* fixed backquote in created module name bug
* fixed view ACU op->term mapping bug
* added -no-wrap command line option
* disallow parameter passing in nonfinal instantiations
* allow renaming of modules with bound parameters
Overview of Changes in Maude alpha86b
=====================================
* module garbage collection bug fixed
* metasummation bug fixed
* target modules with free parameters no longer allowed in views
* illegal importations no longer tolerated
* views can no longer map module defined stuff
* renamings can no longer map parameter defined stuff
* operator mappings now allowed in views
* dependency tracking supports views
* meta support for parameterization
* identity elements added for various structures in prelude
Overview of Changes in Maude alpha86a
=====================================
* fixed parameter checking bug for modules with both free and bound
parameters
* structured sorts printed correctly in various places
* theory-views now pushed into parameterized sorts
* new naming convention for otf modules
* bound parameter instantiation now handled like Full Maude
* -no-advise command line flag
* declined messages to external objects generate advisories
Overview of Changes in Maude alpha86
====================================
* fixed loop mode \/ bug
* metaPrettyPrint() now supports options
* preregularity and constructor consistancy errors now produce a
single informative warning
* set trace rewrite and set trace body options
* fixed metaXmatch() kind clash bug
* SO_REUSEADDR flag set on server sockets
* first attempt at parameterization in module system
Overview of Changes in Maude alpha85a
=====================================
* fixed more sufficient completeness issues in the prelude
* metadata attribute now allowed for operator declarations
* added crude support for sockets as external objects
Overview of Changes in Maude alpha85
====================================
* added min/max functions to number hierarchy
* fixed bug in up'ing FloatOpSymbol hook
* fixed sufficient completeness issues in the prelude
* fixed a bug in up'ing terms which gave kind variables the wrong
sort
* glbSorts() now handles kinds
* show profile now includes percentages
* show path labels command added
* metaSearchPath() added
* set clear rules on/off command added
* maximalAritySet() added
Overview of Changes in Maude alpha84d
=====================================
* fixed 0.0 ^ -1.0 bug
* module selectors now support theories
Overview of Changes in Maude alpha84c
=====================================
* added random number generation
* added counters
* trace applications in metaApply()/metaXapply()
Let the package use the TOOLS facilities for flex and bison
Changes in this version includes a few bugfixes, support for syntax for
theories, and parser improvement
Update fixes PR 31753
in the process. (More information on tech-pkg.)
Bump PKGREVISION and BUILDLINK_DEPENDS of all packages using libtool and
installing .la files.
Bump PKGREVISION (only) of all packages depending directly on the above
via a buildlink3 include.
Maude 2 extends and generalizes Maude 1 to allow more expressive
modules and a wider range of computational commands.
The license has been changed to the GNU General Public License.
specification/programming.
Package provided by Paolo Torelli in pkg/11280.
Attention: Very restrictive license, to be filled out and returned in
hardcopy before usage.
