Contents of /cduce/trunk/CHANGES

Since 0.2.2

- 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

- Tools:
   * A new tool cduce_mktop produce customized CDuce toplevels with embedded 
     OCaml externals.
   * Removed the validate tool.

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


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	1434	Since 0.2.2
2
3	abate	1502	- Language:
4			* Warning for capture variables and projections that always return the empty
5			sequence.
6			* Major rewrite of the support for XML Schema
7			* removed print_schema directive
8			* removed the "kind" selector (e.g. S # t as element)
9			* include,import implemented
10			* support wildcards any,anyAttrivbute
11			* support xsi:nil
12			* support xsd:decimal,xsd:float
13			* many bug fixes
14			* Removed the syntax "external {...}", replaced with
15			"unit.val with { ty1 ty2 ... }".
16			* Removed the syntax H:val, replaced with H.val.
17			* Removed the syntax S#t, replaced with S.t.
18			* Overloaded the dot (record field acces, CDuce, OCaml, Schema units).
19			A dot in an identifier must now be escaped with a backslash, e.g. x\.y
20			* Identifiers (for types, values) are now qualified names.
21			* float_of: String -> Float
22	abate	1434
23	abate	1502	- Tools:
24			* A new tool cduce_mktop produce customized CDuce toplevels with embedded
25			OCaml externals.
26	abate	1504	* Removed the validate tool.
27	abate	1502
28			- Implementation:
29			* Various bug fixes
30			* More efficient hash-consing of types
31			* improved #print_type (does not use the abbreviation for the printed type)
32
33
34	abate	1422	0.2.2
35	abate	1286
36	abate	1422	- Language:
37			* Runtime type-check: (e :? t) raises an exception when e doesn't
38			have type t; the exception is an explanation of why this is not the case.
39			(The actual message may change in the future.)
40			* Better return type for load_xml, defined as:
41			AnyXml=<(Atom) (Record)>[ (AnyXml\|Char)* ]
42			* New style for comments: /* ... */
43			Simple and double quotes within these comments are not handled
44			specially. Moreover, these comments cannot be nested.
45			The new style should be used for textual comments (which can include
46			the simple quote); the old style is better for ignoring pieces of code.
47			* Pattern guard /p in regexps to match the current tail. This can be used
48			for setting "markers" without capturing anything, e.g.:
49			[ (/(x:=1) ...) \| (/(x:=2) ...) ]
50			Back to the old semantics for default value patterns in regexps
51			(they do capture an element).
52			* New syntax {...; l = p else p'; ... }. p' is applied
53			to the whole matched record when p does not match (or when
54			the field is missing). Equivalent to:
55			{ ...; l = p; ...} \| ({...;...} & p')
56			* Punning in record/attribute expressions and patterns.
57			{ x; y } is a shorthand for {x=x;y=y}.
58			* New syntax for R**n in regular expressions, equivalent
59			to R...R (n times), where n > 0.
60			* Interval arithmetic for the * operator.
61			* Warning for potential division by 0.
62			* New "system", "exit", "getenv" built-in functions.
63	abate	1401
64	abate	1422	- Toplevel, interpreter, compiler:
65			* New #silent, #verbose directives.
66			* New --script option.
67			* Removed the warning "no caml interface".
68
69			- Compilation:
70			* Better compilation of sequence capture variables.
71			Now, [ ... x::Any* ] is as efficient as [ ... ; x ]. Can also be written
72			[ ... /x _* ]. The [ ... ; ... ] syntax is no longer necessary
73			and might be deprecated.
74
75			- Bug fixes, including:
76			* Bug fixes in configure/Makefile for Cygwin.
77			* Bug fix for the compilation of complex patterns with records.
78			* Fixed a little bit support for XML Schema, but still largely broken.
79			* Fix --stdin.
80	abate	1423	* Bug fix in print_xml (do not create a namespace decl for "xml:").
81	abate	1422
82	abate	1425	- Distribution:
83	abate	1422	* apps-cduce-cvs GODI package is updatable.
84	abate	1425	* The release tarball does not contain the CDuce website, only
85			the HTML documentation (memento, tutorial, manual).
86	abate	1422
87	abate	1261	0.2.1
88	abate	1230
89			- string:// scheme for load_xml and others
90	abate	1261	- code updated to OCaml 3.08.1, PXP 1.1.95
91			- NOTE: support for namespaces in XML Schema may be broken
92	abate	1230
93	abate	1176	0.2.0
94	abate	1077
95	abate	1218	- OCaml/CDuce interface.
96
97	abate	1086	- Language:
98	abate	1218	* Support for URLs in load_xml, load_html, load_file, and schemas:
99	abate	975	e.g. you can write `` load_html "http://www.cduce.org/" ''
100	abate	1218	(need either the ocurl package or the netclient package).
101	abate	796	* More advanced (and documented) support for XML Schemas.
102	abate	820	* Preliminary integration of CQL query language that is:
103	abate	1218	select e from p1 in e1, ... ,pn in en where e'.
104			* Allow structured constants in default value patterns (p := c).
105	abate	1086	* Default value patterns in regexps don't consume an element.
106	abate	1218	* Logical operators &&, \|\|, and not.
107			* New syntax for currified functions
108			fun (p1 : t1)...(pn : tn) : t = ...
109	abate	1201
110			- Incompatible changes:
111	abate	1218	* argv is now an operator of type [] -> [ String* ].
112			* The --dump, --load, --save options are deprecated.
113	abate	1205	* Changes to the command line. "--pxp" is replaced with "--no expat".
114	abate	1086
115			- Implementation:
116			* Code upgraded to Ocaml 3.07.
117			* Major cleaning in progress.
118			* Added internal support for abstract data types.
119			* Using ulex instead of wlex.
120			* Sources can now be in utf8.
121	abate	1218	* Separate compilation.
122			* Lazy implementation of @.
123	abate	664
124	abate	1086	- Other:
125			* Added configure script.
126	abate	1218	* Various Makefile improvements.
127	abate	1086
128			- Bug fixes:
129			* Bug fixes in the parser. Tuples are now ok in regexps.
130
131
132	abate	641	0.1.1
133	abate	642	* Various bug fixes (expat might now work)
134	abate	623	* Sequencing operator e1;e2 (equivalent to: let [] = e1 in e2)
135			* Encoded references
136
137
138	abate	563	0.1.0
139	abate	562	* Support for XML Namespaces
140	abate	527	* Better support for expat; clean Makefile
141	abate	489	* Get rid of ;; and let fun in examples
142	abate	562	* Optional ; for record in attribute position (values and types/patterns)
143	abate	489	* Split --dump into --load and --save
144	abate	527	* Better handling of strings (specific node in AST)
145			* Map, transform: tail-recursive implementation
146			* Preliminary support for XML Schema
147			* Various bug fixes
148	abate	489
149	abate	527
150	abate	475	0.0.91
151			* Second alpha release
152			* Bug fixes and syntax changes (e.g. making "fun" optional in "let fun")
153			* Experimenting with expat support (see expat/README)
154
155
156	abate	370	0.0.9
157			* First public release (alpha release)