Class CriterionParser

A class for parsing a general property or predefined matching criterion.

Instance Methods

[hide private]

__init__(self, definitions_dict=None)

error(self, err)
Print the error and exit.

expression_error(self, msg)
Print an error about an invalid expression and exit.

parse(self, line, line_num=None)
Create a Criterion object from a string.

Method Details

[hide private]

parse(self, line, line_num=None)


Create a Criterion object from a string.  The method expects an
input line of the form

    <name>

    ...or...

    <name> <operator> <value>

The first form is valid only for property criteria. 

If the instance has a 'definitions_dict', definition criteria will
be checked against it for validity.

Returns a Criterion.