doParse
void doParse(Parser parser,
ParserContext context)
Parses the part of an expression string associated with this ParserExtension.
This method must add commands to context.prog that will generate exactly ONE
number on the stack when they are executed. Parsing routines from the Parse class,
such as parseFactor and parseExpression, can be called
to parse sub-parts of the string. The name of the command
has already been read from the ParseContext when doParse() is called.
(At the time this is called, context.tokenString is the
name under which this ParserExtension was registered with the
Parser. This makes it possible to register the same ParserExtension
under several names, with each name represnting a different
meaning.)