* Raise an exception when the whole expression cannot be parsed. Previous behaviour would discard the segment that didn't match the expression grammar.
0.3.0
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* Add None type and is/isnot operators (contributed by ocurero)
0.2.0
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* Fixed error caused by refactor from internal codebase that was preventing deep context level values from being referenced in a substitution value
0.1.2
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* Improved documentation
0.1.1
==================
* Made ``context`` optional * Improved documentation