Add object-pool and auto-enums to enhance performance

See merge request redox-os/ion!972

- object-pool exists to reuse strings without allocating
- auto-enums can prevent the the need to box trait return values

Preallocate vectors & share branches & remove clones

See merge request redox-os/ion!971

AdminXVII authored 5 years ago and Michael Aaron Murphy committed 5 years ago

Use references rather than owned types
Use peekable

AdminXVII authored 5 years ago and Michael Aaron Murphy committed 5 years ago

Make sure to preallocate the right length for vector as much as possible
Combine branches where possible
Dont split whitespace and join with spaces after expand_process

Remove needless clones for history

See merge request redox-os/ion!970

Group related statement blocks to make it more obvious for adaptation to
recursive parsing

Replace enum with last char
Remove CommType enum and replace with more understandable logic
Make assignements fit on one line

Refactor flow

See merge request redox-os/ion!968

AdminXVII authored 5 years ago and Michael Aaron Murphy committed 5 years ago

Group related statement blocks to make it more obvious for adaptation to
recursive parsing

AdminXVII authored 5 years ago and Michael Aaron Murphy committed 5 years ago

Replace enum with last char
Remove CommType enum and replace with more understandable logic
Make assignements fit on one line