* Support for kwargs and keyword-only args (Py3)
* Optional function arguments
* Smart algorithm to find matching function overload without side effects
* Ability to organize functions into layers
* Configurable list of operators (left/right associative binary, prefix/suffix unary with precedence)
* No global variables. There can be more than one parser with different set of operators simultaneously
* List literals ([a, b])
* Dictionary literals ({ a => b})
* Handling of escape characters in string literals
* Verbatim strings (`...`) and double-quotes ("...")
* =~ and !~ operators in default configuration (similar to Perl)
* -> operator to pass context
* Alternate operator names (for example '*equal' instead of '#operator_=')
so that it will be possible to have different symbol for particular operator
without breaking standard library that expects operator to have well known names
* Set operations
* Support for lists and dictionaries as a dictionary keys and set elements
* New framework to decorate functions
* Ability to distinguish between functions and methods
* Switchable naming conventions
* Unicode support
* Execution options available to all invoked functions
* Iterators limitation
* Ability to limit memory consumption
* Can work with custom context classes
* It is possible to extend both parser and set of expression classes on user-side
* It is possible to create user-defined types (also can be used for dependency injection)
* Legacy yaql 0.2.x backward compatibility mode
* Comprehensive standard library of functions
* High unit test coverage
Change-Id: Ie31b7c3cbadbff5b7728f55b3ba7bcb78a39d156
152a88140a