petitparser 4.0.0-nullsafety

A dynamic parser framework to build efficient grammars and parsers quickly.

Changelog

4.0.0

• Dart 2.10 requirement and null-safety.
• Success.message throws an UnsuppotedError exception, instead of returning null.
• DelegateParser has been made abstract to avoid a concrete class in-between abstract classes.
• Parser.delegate() has been removed, use Parser.settable() as an equivalent replacement.
• Parser.optional() is now returning Parser<T?>, to provide a non-null default value use Parser.optionalWith(T value).
• Parser.not() is now returning the failure Parser<Failure<T>> as success value, instead of null.
• epsilon() is now returning Parser<void>, to provide a non-null default value use epsilonWith(T value).

3.1.0

• Fix missing type information on eof and failure parser.
• Optimize character predicates by using lookup tables.
• Improvements to documentation and examples.

3.0.0

• Dart 2.7 compatibility and requirement (extension methods).
• New features:
  • String.toParser() enables creating efficient string and character parsers more easily.
  • Iterable.toChoiceParser() and Iterable.toSequenceParser() enables creating parsers from collections more easily.
  • Parser.callCC(Function) enables capturing a parse continuation more easily.
• Restructure the internal code to be more modular:
  • The Parser class now only defines a few core methods, everything else is an extension method.
  • As long as you continue to import package:petitparser/petitparser.dart none of the changes should affect existing code.
  • Parser implementations have been moved to package:petitparser/parser.dart.
  • Helpers to parse and extract data has been moved to package:petitparser/matcher.dart.
  • The expression builder has been moved to package:petitparser/expression.dart.
  • The grammar builder has been moved topackage:petitparser/definition.dart.
• Breaking changes:
  • Parser is no longer a Pattern, but can be converted to one with toPattern.
  • anyIn has been removed in favor of the already existing and equivalent anyOf parser.
  • pick and permute are defined on Parser<List>, thus they won't be available on the more generic Parser<dynamic> any longer. Prefix the operators with a castList operator.

2.5.0

• Made ParserError a FormatException to follow typical Dart exception style.

2.4.0

• Dart 2.4 compatibility and requirement.
• More tight typing, more strict linter rules.
• Documentation improvements.

2.3.0

• Dart 2.3 compatibility and requirement.
• The expression builder supports building expression with parenthesis.
• Improved the documentation on greedy and lazy parsers.
• Add a prolog parser and interpreter example.
• Numerous optimizations and improvements.

2.2.0

• Dart 2.2 compatibility and requirement.
• Parser implements the Pattern interface.
• Add an example of the expression builder to the tutorial.
• Introduce a fast-parse mode that avoids unnecessary memory allocations during parsing.

2.1.0

• Rename ParserError to ParserException, and make it an Exception.
• Simplify the EndOfInputParser and the ListParser.
• Add a PositionParser that produces the current input position.
• Constructor assertions across the stack.

2.0.0

• Make parsers fully typed, where it makes sense.
  • In most cases this should have no effect on existing code, but sometimes can point out actual bugs.
  • In rare cases, it might be necessary to insert cast<R> or castList<R> at the appropriate places.
• Move examples into their own example package.

1.8.0

• Drop Dart 1.0 compatibility.

1.7.6

• More Dart 2 strong mode fixes.

1.7.5

• Dart 2.0 strong mode compatibility.
• Removed deprecated code, and empty beta package.
• Reformatted all code using dartfmt.

1.7.0

• Dart 2.0 compatibility.
• Fixed numerous analyzer warnings.
• Generate better default error messages.
• Moved example grammars to examples.

1.6.1

• Fix bug with duplicated package name.
• Update documentation.

1.6.0

• Migrate to micro libraries.
• Move Smalltalk, Json, Dart and Lisp grammars to examples.

1.5.5

• Strict typing fixes.

1.5.4

• Fix analyzer warnings.
• Fix package dependencies.

1.5.3

• Dev compiler support.

1.5.2

• Enable strong mode.

1.5.1

• Improve the Dart parser and add more tests.

1.5.0

• Update documentation to match the style guide.
• Change library names.
• Add optimizations and tests for the Dart language grammar.
• Improve comments.
• Better error-handling and primitives for Lisp command line app.
• Fix unicode parsing in the JSON parser.
• Add browser back to dev_dependencies.

1.4.3

• Restore the CompositeParser class.
• Add more references to open source projects using PetitParser.

1.4.2

• Integrate the tutorial into the README.
• Improve formatting of README code blocks.

1.4.1

• Improve test coverage.
• Bump minimum SDK to 1.8.0.
• Remove deprecated CompositeParser class.

1.4.0

• Migrate from unittest to test.
• Setup Travis.
• Allow for const GrammarDefinitions.
• Fix typo in docs.
• Clean up the JSON grammar.
• Format the benchmarks.

1.3.7

• Cleanup dependencies:
  • browser is now >=0.10.0 <0.11.0.
  • unittest is now >=0.11.0 <0.12.0.
  • Remove explicit dependency on matcher package.
• Make the JSON parser twice as fast.
• Reformat tests.

1.3.6

• Add a benchmark for JSON native vs PetitParser.

1.3.5

• Change hasEqualProperties to gracefully handle parsers of inconsistent types.

1.3.4

• Format source code.
• Add missing documentation.

1.3.3

• Performance optimizations