Dart repointer (reptr) puts the sharp part in your Dart aims to facilitate fast code generation for Dart. It consists of the tool itself and a Dart parser library.
- Loading source files
- Loading the complete file for parsing is fine
- Memory-mapping is not faster per se
- May play nicely with a lazy tokenizer with lazy UTF-8 validation
- Parsing
- The parser is a partial parser: it recognizes certain parts of the target language and can skip over the rest
- Capturing slices of the source (
&str) is extremely cheap (doesn't cause memory allocation); do that - When feasible, avoid memory allocation (namely, the use of
Vecand co.) - Do not start parsing a construct with whitespace (e.g. the import-stmt. parser should start with consuming
import, not whitespace) - Do not consume the trailing whitespace after a construct (e.g. in
import 'dart:math';\n\ndo not consume\n\n)- This will be more important for source transformation later on
- A tempting feature: in-place code generation
- Requires accurate back-to-source transformation
- Output formatting
- Delegate to dart format (it's fast enough)