Contents of /cduce/trunk/CHANGES

0.4.1

- Tools:
   * Error message when using --mlstub without the built-in OCaml interface
   * Improvements to the type pretty-printer
   * "include" uses the -I options

- Language:
   * New Caml_int builtin type
   * The // construction no longer stops at the first matched subtree
     on each branch
   * New "dump_xml" and "dump_xml_utf8", equivalent to the composition
     of print and print_xml, but more efficient
     

- Implementation:
   * New subtyping algorithm
   * Small improvement to the pattern matching compiler
   * Improve type-checking time for map
   * Improve type-checking of record expressions
   * Don't display warnings for unused branches in ghost (generated) pattern 
     matching

- Bug fix:
   * "eval" can now be called several times and use the toplevel environment
   * use "open_out_bin" (needed for Cygwin installation)
   * "open" allowed as tag name
   * exceptions raised by the expat parser and by the dump_to_file
     primitives are now catchable
   * work-around the double close bug in OCaml

0.4.0pl1

- Packaging bug

0.4.0

- Adapted to OCaml 3.09.
- To build the OCaml/CDuce interface, OCaml sources are now needed.

0.3.92

- Tools:
   * Build and install dtd2cduce when PXP is available.
   * Display of location for errors and warnings compatible with OCaml.

- Language:
   * Better error messages for xtransform.

- Bug fix:
   * Forgot PLIST.godi in the package.


0.3.91

- Tools:
   * Get rid of cdo2ml and mlcduce_wrapper. Now included in cduce.

- Bug fix:
   * Internal uid collision when using OCaml externals.
   * Makes "String.length" works (String used to resolve to the CDuce type).

0.3.9

- Language:
   * Added split_atom, make_atom. Removed atom_of.
   * Added char_of_int built_in function.
   * Now int_of also accepts octal binary and hexadecimals.
   * The field access also works for XML element attributes.
   * More catchable exceptions (for load_xml, load_file, etc).
   * namespaces, schemas, "using" identifiers are now exported.
   * "open" statement.

- Implementation:
   * More efficient implementation of records at runtime.
   * Clean-up of the internal representation.
   * The XML Schemas are now parsed only at compile time.
   * The automata for pattern matching are now produced at compile time.

- Tools:
   * The functionality of cdo2ml is now assured by cduce itself, with
     the --mlstub option.
   * Remove the --dump option (which was deprecated).
   * Remove support for sessions in the web prototype.

- Bug fixes:
   * Correct handling of external references with expat.
   * Installation problem under some BSD (using "install -c").

0.3.2
   * Bug fix in configure

0.3.1

- Bug fix:
   * configure must not require pxp
   * inclusion of external entities with expat
   * META.in, cduce_mktop missing in package
   * several bugfixes for XML Schema
   * Adapt to ocaml-expat 0.9.1
   * don't build cdo2ml, mlcduce_wrapper when ocaml iface not available

- Language:
   * Can now preserve namespaces when parsing XML or when creating XML elements
   * "or" is now equivalent to ||

0.3.0

- Language:
   * Warning for capture variables and projections that always return the empty
     sequence.
   * Major rewrite of the support for XML Schema
     * removed print_schema directive
     * removed the "kind" selector (e.g. S # t as element)
     * include,import implemented
     * support wildcards any,anyAttrivbute
     * support xsi:nil
     * support xsd:decimal,xsd:float
     * many bug fixes
   * Removed the syntax  "external {...}", replaced with
     "unit.val with { ty1 ty2 ... }".
   * Removed the syntax H:val, replaced with H.val.
   * Removed the syntax S#t, replaced with S.t.
   * Overloaded the dot (record field acces, CDuce, OCaml, Schema units).
     A dot in an identifier must now be escaped with a backslash, e.g. x\.y
   * Identifiers (for types, values) are now qualified names.
   * float_of: String -> Float
   * Syntax modifications for records and attributes:
      - ".." to denote open record types/patterns:
          open record:  { l1=t1 l2=t2 .. }
          closed record: { l1=t1 l2=t2 }
      - the ";" between fields is optional even for records 
        (used to be optional only for attributes)
   * Keywords are now allowed as type names
   * Concatenation @ allowed in types
   * Record concatenation + allowed in types
   * Changed "string://" URL-pseudo schema to "string:" 
   * Better resolution of external entities for PXP and expat

- Tools:
   * A new tool cduce_mktop produces customized CDuce toplevels with embedded 
     OCaml externals.
   * Removed the validate tool.
   * Don't build dtd2cduce by default (it requires PXP). An online
     version is available at http://www.cduce.org/dtd2cduce.html

- Implementation:
   * Various bug fixes.
   * More efficient hash-consing of types.
   * improved #print_type (does not use the abbreviation for the printed type).

- Distribution:
   * MIT license.
   * CDuce can be built without support for PXP.

- CQL:
   * Rewrote the optimization (pushing projections).
   * The syntax for "where" clause is now simply an "and"-separated
     list of conditions ("or" is no longer supported).
   * Better types for "min","max","distinct_values" operators.

0.2.2

- Language:
  * Runtime type-check: (e :? t) raises an exception when e doesn't 
    have type t; the exception is an explanation of why this is not the case.
    (The actual message may change in the future.)
  * Better return type for load_xml, defined as:
    AnyXml=<(Atom) (Record)>[ (AnyXml|Char)* ]
  * New style for comments: /* ... */
    Simple and double quotes within these comments are not handled
    specially. Moreover, these comments cannot be nested.
    The new style should be used for textual comments (which can include
    the simple quote); the old style is better for ignoring pieces of code.
  * Pattern guard /p in regexps to match the current tail. This can be used
    for setting "markers" without capturing anything, e.g.:
       [ (/(x:=1) ...) | (/(x:=2) ...) ]
    Back to the old semantics for default value patterns in regexps
    (they do capture an element).
  * New syntax  {...; l = p else p'; ... }. p' is applied
    to the whole matched record when p does not match (or when
    the field is missing). Equivalent to:
    { ...; l = p; ...} | ({...;...} & p')
  * Punning in record/attribute expressions and patterns.
    { x; y } is a shorthand for {x=x;y=y}.
  * New syntax for R**n in regular expressions, equivalent
    to R...R (n times), where n > 0.
  * Interval arithmetic for the * operator.
  * Warning for potential division by 0.
  * New "system", "exit", "getenv" built-in functions.

- Toplevel, interpreter, compiler:
  * New #silent, #verbose directives.
  * New --script option.
  * Removed the warning "no caml interface".

- Compilation:
  * Better compilation of sequence capture variables.
    Now, [ ... x::Any* ] is as efficient as [ ... ; x ]. Can also be written
    [ ... /x _* ]. The [ ... ; ... ] syntax is no longer necessary
    and might be deprecated.
    
- Bug fixes, including:
  * Bug fixes in configure/Makefile for Cygwin.
  * Bug fix for the compilation of complex patterns with records.
  * Fixed a little bit support for XML Schema, but still largely broken.
  * Fix --stdin.
  * Bug fix in print_xml (do not create a namespace decl for "xml:").

- Distribution:
  * apps-cduce-cvs GODI package is updatable.
  * The release tarball does not contain the CDuce website, only
    the HTML documentation (memento, tutorial, manual).

0.2.1

- string:// scheme for load_xml and others
- code updated to OCaml 3.08.1, PXP 1.1.95
- NOTE: support for namespaces in XML Schema may be broken

0.2.0

- OCaml/CDuce interface.

- Language:
  * Support for URLs in load_xml, load_html, load_file, and schemas:
    e.g. you can write `` load_html "http://www.cduce.org/" ''
    (need either the ocurl package or the netclient package).
  * More advanced (and documented) support for XML Schemas. 
  * Preliminary integration of CQL query language that is:
    select e from p1 in e1, ... ,pn in en where e'.
  * Allow structured constants in default value patterns (p := c).
  * Default value patterns in regexps don't consume an element.
  * Logical operators &&, ||, and not.
  * New syntax for currified functions
    fun (p1 : t1)...(pn : tn) : t = ...

- Incompatible changes:
  * argv is now an operator of type [] -> [ String* ].
  * The --dump, --load, --save options are deprecated.
  * Changes to the command line. "--pxp" is replaced with "--no expat".
 
- Implementation:
  * Code upgraded to Ocaml 3.07.
  * Major cleaning in progress.
  * Added internal support for abstract data types.
  * Using ulex instead of wlex.
  * Sources can now be in utf8.
  * Separate compilation.
  * Lazy implementation of @.

- Other:
  * Added configure script.
  * Various Makefile improvements.

- Bug fixes:
  * Bug fixes in the parser. Tuples are now ok in regexps.


0.1.1
  * Various bug fixes  (expat might now work)
  * Sequencing operator   e1;e2  (equivalent to: let [] = e1 in e2)
  * Encoded references
  

0.1.0
  * Support for XML Namespaces
  * Better support for expat; clean Makefile
  * Get rid of ;; and let fun in examples
  * Optional ; for record in attribute position (values and types/patterns)
  * Split --dump into --load and --save
  * Better handling of strings (specific node in AST)
  * Map, transform: tail-recursive implementation
  * Preliminary support for XML Schema
  * Various bug fixes


0.0.91
  * Second alpha release
  * Bug fixes and syntax changes (e.g. making "fun" optional in "let fun")
  * Experimenting with expat support (see expat/README)
 

0.0.9  
  * First public release (alpha release)
1	abate	1908	0.4.1
2	abate	1819
3	abate	1908	- Tools:
4			* Error message when using --mlstub without the built-in OCaml interface
5			* Improvements to the type pretty-printer
6			* "include" uses the -I options
7	abate	1819
8	abate	1908	- Language:
9			* New Caml_int builtin type
10			* The // construction no longer stops at the first matched subtree
11			on each branch
12			* New "dump_xml" and "dump_xml_utf8", equivalent to the composition
13			of print and print_xml, but more efficient
14
15
16			- Implementation:
17			* New subtyping algorithm
18			* Small improvement to the pattern matching compiler
19			* Improve type-checking time for map
20			* Improve type-checking of record expressions
21			* Don't display warnings for unused branches in ghost (generated) pattern
22			matching
23
24			- Bug fix:
25			* "eval" can now be called several times and use the toplevel environment
26			* use "open_out_bin" (needed for Cygwin installation)
27			* "open" allowed as tag name
28			* exceptions raised by the expat parser and by the dump_to_file
29			primitives are now catchable
30			* work-around the double close bug in OCaml
31
32	abate	1814	0.4.0pl1
33
34			- Packaging bug
35
36	abate	1812	0.4.0
37
38			- Adapted to OCaml 3.09.
39			- To build the OCaml/CDuce interface, OCaml sources are now needed.
40
41	abate	1801	0.3.92
42	abate	1779
43			- Tools:
44			* Build and install dtd2cduce when PXP is available.
45	abate	1786	* Display of location for errors and warnings compatible with OCaml.
46	abate	1779
47			- Language:
48			* Better error messages for xtransform.
49
50	abate	1801	- Bug fix:
51			* Forgot PLIST.godi in the package.
52	abate	1779
53	abate	1801
54	abate	1772	0.3.91
55
56			- Tools:
57			* Get rid of cdo2ml and mlcduce_wrapper. Now included in cduce.
58
59			- Bug fix:
60			* Internal uid collision when using OCaml externals.
61			* Makes "String.length" works (String used to resolve to the CDuce type).
62
63	abate	1762	0.3.9
64
65			- Language:
66	abate	1694	* Added split_atom, make_atom. Removed atom_of.
67	abate	1671	* Added char_of_int built_in function.
68	abate	1698	* Now int_of also accepts octal binary and hexadecimals.
69			* The field access also works for XML element attributes.
70	abate	1762	* More catchable exceptions (for load_xml, load_file, etc).
71			* namespaces, schemas, "using" identifiers are now exported.
72			* "open" statement.
73
74			- Implementation:
75	abate	1746	* More efficient implementation of records at runtime.
76			* Clean-up of the internal representation.
77	abate	1762	* The XML Schemas are now parsed only at compile time.
78			* The automata for pattern matching are now produced at compile time.
79
80			- Tools:
81	abate	1746	* The functionality of cdo2ml is now assured by cduce itself, with
82			the --mlstub option.
83			* Remove the --dump option (which was deprecated).
84			* Remove support for sessions in the web prototype.
85	abate	1762
86			- Bug fixes:
87	abate	1746	* Correct handling of external references with expat.
88	abate	1762	* Installation problem under some BSD (using "install -c").
89	abate	1671
90	abate	1570	0.3.2
91			* Bug fix in configure
92
93	abate	1564	0.3.1
94	abate	1565
95			- Bug fix:
96	abate	1564	* configure must not require pxp
97			* inclusion of external entities with expat
98			* META.in, cduce_mktop missing in package
99	abate	1565	* several bugfixes for XML Schema
100			* Adapt to ocaml-expat 0.9.1
101			* don't build cdo2ml, mlcduce_wrapper when ocaml iface not available
102	abate	1564
103	abate	1565	- Language:
104			* Can now preserve namespaces when parsing XML or when creating XML elements
105			* "or" is now equivalent to \|\|
106
107	abate	1547	0.3.0
108	abate	1434
109	abate	1502	- Language:
110			* Warning for capture variables and projections that always return the empty
111			sequence.
112			* Major rewrite of the support for XML Schema
113			* removed print_schema directive
114			* removed the "kind" selector (e.g. S # t as element)
115			* include,import implemented
116			* support wildcards any,anyAttrivbute
117			* support xsi:nil
118			* support xsd:decimal,xsd:float
119			* many bug fixes
120			* Removed the syntax "external {...}", replaced with
121			"unit.val with { ty1 ty2 ... }".
122			* Removed the syntax H:val, replaced with H.val.
123			* Removed the syntax S#t, replaced with S.t.
124			* Overloaded the dot (record field acces, CDuce, OCaml, Schema units).
125			A dot in an identifier must now be escaped with a backslash, e.g. x\.y
126			* Identifiers (for types, values) are now qualified names.
127			* float_of: String -> Float
128	abate	1519	* Syntax modifications for records and attributes:
129			- ".." to denote open record types/patterns:
130			open record: { l1=t1 l2=t2 .. }
131			closed record: { l1=t1 l2=t2 }
132			- the ";" between fields is optional even for records
133			(used to be optional only for attributes)
134	abate	1520	* Keywords are now allowed as type names
135	abate	1524	* Concatenation @ allowed in types
136			* Record concatenation + allowed in types
137	abate	1535	* Changed "string://" URL-pseudo schema to "string:"
138			* Better resolution of external entities for PXP and expat
139	abate	1434
140	abate	1502	- Tools:
141	abate	1512	* A new tool cduce_mktop produces customized CDuce toplevels with embedded
142	abate	1502	OCaml externals.
143	abate	1504	* Removed the validate tool.
144	abate	1542	* Don't build dtd2cduce by default (it requires PXP). An online
145			version is available at http://www.cduce.org/dtd2cduce.html
146	abate	1502
147			- Implementation:
148	abate	1516	* Various bug fixes.
149			* More efficient hash-consing of types.
150			* improved #print_type (does not use the abbreviation for the printed type).
151	abate	1502
152	abate	1506	- Distribution:
153	abate	1516	* MIT license.
154	abate	1542	* CDuce can be built without support for PXP.
155	abate	1502
156	abate	1516	- CQL:
157			* Rewrote the optimization (pushing projections).
158			* The syntax for "where" clause is now simply an "and"-separated
159			list of conditions ("or" is no longer supported).
160			* Better types for "min","max","distinct_values" operators.
161	abate	1506
162	abate	1422	0.2.2
163	abate	1286
164	abate	1422	- Language:
165			* Runtime type-check: (e :? t) raises an exception when e doesn't
166			have type t; the exception is an explanation of why this is not the case.
167			(The actual message may change in the future.)
168			* Better return type for load_xml, defined as:
169			AnyXml=<(Atom) (Record)>[ (AnyXml\|Char)* ]
170			* New style for comments: /* ... */
171			Simple and double quotes within these comments are not handled
172			specially. Moreover, these comments cannot be nested.
173			The new style should be used for textual comments (which can include
174			the simple quote); the old style is better for ignoring pieces of code.
175			* Pattern guard /p in regexps to match the current tail. This can be used
176			for setting "markers" without capturing anything, e.g.:
177			[ (/(x:=1) ...) \| (/(x:=2) ...) ]
178			Back to the old semantics for default value patterns in regexps
179			(they do capture an element).
180			* New syntax {...; l = p else p'; ... }. p' is applied
181			to the whole matched record when p does not match (or when
182			the field is missing). Equivalent to:
183			{ ...; l = p; ...} \| ({...;...} & p')
184			* Punning in record/attribute expressions and patterns.
185			{ x; y } is a shorthand for {x=x;y=y}.
186			* New syntax for R**n in regular expressions, equivalent
187			to R...R (n times), where n > 0.
188			* Interval arithmetic for the * operator.
189			* Warning for potential division by 0.
190			* New "system", "exit", "getenv" built-in functions.
191	abate	1401
192	abate	1422	- Toplevel, interpreter, compiler:
193			* New #silent, #verbose directives.
194			* New --script option.
195			* Removed the warning "no caml interface".
196
197			- Compilation:
198			* Better compilation of sequence capture variables.
199			Now, [ ... x::Any* ] is as efficient as [ ... ; x ]. Can also be written
200			[ ... /x _* ]. The [ ... ; ... ] syntax is no longer necessary
201			and might be deprecated.
202
203			- Bug fixes, including:
204			* Bug fixes in configure/Makefile for Cygwin.
205			* Bug fix for the compilation of complex patterns with records.
206			* Fixed a little bit support for XML Schema, but still largely broken.
207			* Fix --stdin.
208	abate	1423	* Bug fix in print_xml (do not create a namespace decl for "xml:").
209	abate	1422
210	abate	1425	- Distribution:
211	abate	1422	* apps-cduce-cvs GODI package is updatable.
212	abate	1425	* The release tarball does not contain the CDuce website, only
213			the HTML documentation (memento, tutorial, manual).
214	abate	1422
215	abate	1261	0.2.1
216	abate	1230
217			- string:// scheme for load_xml and others
218	abate	1261	- code updated to OCaml 3.08.1, PXP 1.1.95
219			- NOTE: support for namespaces in XML Schema may be broken
220	abate	1230
221	abate	1176	0.2.0
222	abate	1077
223	abate	1218	- OCaml/CDuce interface.
224
225	abate	1086	- Language:
226	abate	1218	* Support for URLs in load_xml, load_html, load_file, and schemas:
227	abate	975	e.g. you can write `` load_html "http://www.cduce.org/" ''
228	abate	1218	(need either the ocurl package or the netclient package).
229	abate	796	* More advanced (and documented) support for XML Schemas.
230	abate	820	* Preliminary integration of CQL query language that is:
231	abate	1218	select e from p1 in e1, ... ,pn in en where e'.
232			* Allow structured constants in default value patterns (p := c).
233	abate	1086	* Default value patterns in regexps don't consume an element.
234	abate	1218	* Logical operators &&, \|\|, and not.
235			* New syntax for currified functions
236			fun (p1 : t1)...(pn : tn) : t = ...
237	abate	1201
238			- Incompatible changes:
239	abate	1218	* argv is now an operator of type [] -> [ String* ].
240			* The --dump, --load, --save options are deprecated.
241	abate	1205	* Changes to the command line. "--pxp" is replaced with "--no expat".
242	abate	1086
243			- Implementation:
244			* Code upgraded to Ocaml 3.07.
245			* Major cleaning in progress.
246			* Added internal support for abstract data types.
247			* Using ulex instead of wlex.
248			* Sources can now be in utf8.
249	abate	1218	* Separate compilation.
250			* Lazy implementation of @.
251	abate	664
252	abate	1086	- Other:
253			* Added configure script.
254	abate	1218	* Various Makefile improvements.
255	abate	1086
256			- Bug fixes:
257			* Bug fixes in the parser. Tuples are now ok in regexps.
258
259
260	abate	641	0.1.1
261	abate	642	* Various bug fixes (expat might now work)
262	abate	623	* Sequencing operator e1;e2 (equivalent to: let [] = e1 in e2)
263			* Encoded references
264
265
266	abate	563	0.1.0
267	abate	562	* Support for XML Namespaces
268	abate	527	* Better support for expat; clean Makefile
269	abate	489	* Get rid of ;; and let fun in examples
270	abate	562	* Optional ; for record in attribute position (values and types/patterns)
271	abate	489	* Split --dump into --load and --save
272	abate	527	* Better handling of strings (specific node in AST)
273			* Map, transform: tail-recursive implementation
274			* Preliminary support for XML Schema
275			* Various bug fixes
276	abate	489
277	abate	527
278	abate	475	0.0.91
279			* Second alpha release
280			* Bug fixes and syntax changes (e.g. making "fun" optional in "let fun")
281			* Experimenting with expat support (see expat/README)
282
283
284	abate	370	0.0.9
285			* First public release (alpha release)