Provides a one stop shop for OysterPack macros.

## Newtype Pattern
- [op_newtype](https://docs.rs/oysterpack_macros/latest/oysterpack_macros/macro.op_newtype.html)

## Macro Building Blocks

### [AST Coercion](https://danielkeep.github.io/tlborm/book/blk-ast-coercion.html)
- [op_tt_as_expr](https://docs.rs/oysterpack_macros/latest/oysterpack_macros/macro.op_tt_as_expr.html)
- [op_tt_as_item](https://docs.rs/oysterpack_macros/latest/oysterpack_macros/macro.op_tt_as_item.html)
- [op_tt_as_pat](https://docs.rs/oysterpack_macros/latest/oysterpack_macros/macro.op_tt_as_pat.html)
- [op_tt_as_stmt](https://docs.rs/oysterpack_macros/latest/oysterpack_macros/macro.op_tt_as_stmt.html)