Subcontext fixes and formatting
Added type-erased parser, tests and examples
Moved is_parser trait to its own file
new facade-based API
Merge pull request #13 from jamboree/develop

x3 new facade-based API
fix transform_params/ fix integer_sequence for clang
Merge pull request #15 from jamboree/develop

fix transform_params/ fix integer_sequence for clang
Fixed const issue in attr_parser
Fixes for boost::optional explicit operator bool
Merge branch 'main/develop' into feature/x3_keywords
Remove uncessary templating in the tst populating function
Further simplification of the tst populating function
Use the utility integer sequence generator
Add partial support for actions in keyword parsers