[system] View of /trunk/pg/macros/contextTF.pl

Revision 3334 - (download) (as text) (annotate)
Sun Jul 3 20:10:37 2005 UTC (7 years, 10 months ago) by dpvc
File size: 757 byte(s)

Updates to allow string matches to be case-insensitive.  This is now
the default, and can be overridden in the Context by setting the
string's "caseSensitive" attribute.  e.g.:

	 Context()->strings->add("FooBar"=>{caseSensitive=>1});

would rewuire "FooBar" to be entered exactly as typed.

    1 loadMacros("Parser.pl","contextString.pl");
    2 
    3 sub _contextTF_init {}; # don't load it again
    4 
    5 ##########################################################
    6 #
    7 #  Implements contexts for string-valued answers especially
    8 #  for matching problems (where you match against T and F).
    9 #
   10 # Context("TF");
   11 #
   12 #  You can add new strings to the context as needed (or remove old ones)
   13 #  via the Context()->strings->add() and Context()-strings->remove()
   14 #  methods.
   15 #
   16 #  Use
   17 #
   18 # ANS(string_cmp("T","F"));
   19 #
   20 #  when there are two answers, the first being "T" and the second being "F".
   21 #
   22 
   23 $context{TF} = Context("String")->copy;
   24 $context{TF}->strings->are(
   25  "T" => {value => 1},
   26  "F" => {value => 0},
   27  "True" => {alias => "T"},
   28  "False" => {alias => "F"},
   29 );
   30 
   31 Context("TF");
   32 
   33

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