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Revision 3483 - (view) (download) (as text) (annotate) - [select for diffs]
Modified Fri Aug 12 01:21:48 2005 UTC (14 years, 3 months ago) by dpvc
File length: 3387 byte(s)
Diff to previous 3332
Added redefine() function to complement undefine() for various
Context() values.  For example


makes '+' undefined, but


will put it back.  You can specify a context from which to take the
redefinition, and a name in that context, as in


where $content is a reference to a Context object.

The undefine() function lets you undefine several items at once, as in


For redefine, you must put multiple names in square brackets because
of the optional parmeters:


Revision 3332 - (view) (download) (as text) (annotate) - [select for diffs]
Modified Sun Jul 3 20:05:28 2005 UTC (14 years, 5 months ago) by dpvc
File length: 2894 byte(s)
Diff to previous 3274
Fixed a bug in the enable/disable routines that would cause them to
always work on the current context rather than the one whose
enable/disable method was being called.

Revision 3274 - (view) (download) (as text) (annotate) - [select for diffs]
Modified Thu Jun 9 11:16:01 2005 UTC (14 years, 6 months ago) by dpvc
File length: 2900 byte(s)
Diff to previous 2672
Fixed Disable() and Enable() so that they can be called as


as well as


The former is the preferred syntax.

Revision 2672 - (view) (download) (as text) (annotate) - [select for diffs]
Modified Sun Aug 22 22:46:14 2004 UTC (15 years, 3 months ago) by dpvc
File length: 2732 byte(s)
Diff to previous 2579
Added easy calls to disable/enable collections of functions or
individual functions in the current context.  So you can say


to disallow the use of trig functions, or


to disable trig and numeric functions (like log, exp, abs, etc) but
allow sqrt.

Note that disabling sqrt() does not disable x^(1/2) (this must be done
through disabling the ^ and ** operators), and disabling abs() does
not disable |x| (which must be done by removing the '|' definition
from the Context's parens list).

Revision 2579 - (view) (download) (as text) (annotate) - [select for diffs]
Modified Mon Aug 9 21:38:01 2004 UTC (15 years, 4 months ago) by dpvc
File length: 841 byte(s)
Diff to previous 2558
Significant update to new parser.

New features include:

  Better control over format of vector output (you can now
    specify ijk-format rather than <...> format)

  "Fuzzy" reals, where the relations like == return true when the
    two values are "close enough".  (This is controlable using
    parameters similar to those used in NUM_CMP).

  The fuzzy reals are now used in vectors/points/matrices/complexes/intervals
    and so on so that their relations will also be fuzzy.  E.g.,
    (1E-13,2) == (0,3) will be true, and norm(Vector(0,1E-13)) will
    equal 0.

  The two main portions of the parser (the Parser and Value packages)
    now share a common context object for configuration purposes.

Revision 2558 - (view) (download) (as text) (annotate) - [select for diffs]
Added Wed Jul 28 20:32:33 2004 UTC (15 years, 4 months ago) by sh002i
File length: 842 byte(s)
merged changes from rel-2-1-a1 -- stop using that branch.

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