199.10

[Matthew Flatt <mflatt@cs.utah.edu>]

The v200-tagged code in CVS for MzScheme and MrEd is now version 199.10.

The changes are minor:

 * Added `form' and `module' fields to `exn:syntax', and changed the
   `expr' field to contain a syntax object (instead of an
   S-expression).

 * Changed `raise-syntax-error' to accept a symbol, an identifier
   syntax object, or #f as the initial argument. If a symbol is
   provided, it is used as the form name, and the module is unknown. If
   an identifier syntax object is provided, its symbol is used as the
   form name in the generated exception, and its source module is used
   as the module. If #f is provided,the form name and source module are
   extracted from the erroneous expression if it is provided, and if
   the expression is either an identifier syntax object or a pair
   syntax object with an identifier its first position. If #f is
   provided and the form name cannot be extracted from the erroneous
   expression, the form and module names in the generated exception are
   #f.

 * Added `syntax-source-module', which returns a symbol for the name of
   the module whose source contains the given syntax object.

 * Changed the `read-dot-as-symbol' parameter to also disable commas
   and backquotes (rejected as errors, not parsed as symbols) for the
   DrScheme teaching languages.

 * `syntax-case' and `with-syntax' reliably convert non-syntax inputs
   for pattern matching into syntax objects with the lexical context of
   the input expression.

 * Replaced the obscure procedure `dynamic-require-syntax' with the
   obscure procedure `dynamic-require-for-syntax'.

Matthew