chore(deps): bump peg from 0.6.3 to 0.8.0

[dependabot]

Bumps peg from 0.6.3 to 0.8.0.

Release notes

Sourced from peg's releases.

0.8.0

New Features

• #[cache_left_rec] annotation to allow left recursion (#266)
• Return matched token/character from [ ] pattern expression (#234)

Fixes

• Fix Rust grammar for arguments (#261) and type bounds (#279)
• Fix trace feature when using infix!{} (#277)
• Fix #[cache] with grammar lifetime parameters
• Allow clippy::redundant_closure_call lint in generated grammar (#258)

Breaking changes

Most users will not require changes to upgrade from 0.7 to 0.8; these only affect advanced use cases.

• Allow only lifetime, not type, parameters at the grammar level. (type parameters were never properly supported)
• Add 'input lifetime parameter to ParseElem trait so implementations can return tokens by reference. (#268)
• Require Copy on ParseElem::Element to better represent the expectation that they are cheap to copy/move.

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Contributors: @​kevinmehall @​zsol @​neunenak @​fgasperij

0.7.0

New features

• Significantly improved compile-time error messages for invalid grammars
• Support [MyToken(x)] syntax for capturing variables from pattern expressions (#245)
• Restore support for [^ ] inverted pattern syntax
• Add #[no_eof] pub rule() = ... syntax to allow matching a prefix of the input rather than reporting a parse error if the rule does not reach end-of-file (#233)
• Allow rule _ = without parentheses when defining special underscore rule (#243)
• Add grammar-level type and lifetime parameters (#254)
• Compile-time check for repeat expressions that infinite-loop without consuming input (#210)
• Implement PartialEq, PartialOrd, Eq, Ord, Debug, Hash for RuleResult (#217)

Fixes

• Extend detection of infinite-loop left recursion to check inside precedence!() (#238)
• Wrap user-supplied code in immediately-invoked closure so that return and ? behave as expected (#246)
• Remove overzealous error checks to allow passing rule closure arguments as parameters to another call (#226)

Breaking changes

• Add required is_eof() method to Parse trait (#252)
• Certain patterns that would infinite-loop or stack overflow if executed are now a compile-time error
• mixed_site hygiene prevents action code from accessing internal parser state variables such as __input, __pos, etc.

Contributors

@​kevinmehall @​dario23 @​bgw @​adrianwn

Commits

• 40a0049 v0.8.0
• cd3044a Make [] pattern syntax return the matched token/character
• 6838d5d Require ParseElem::Element: Copy
• f09fc34 Add 'input lifetime parameter to ParseElem
• ad7561d Document rule parameters
• 4b7dcaa Expand Rust type and type param grammar
• cdeb247 Test with --trace in GitHub Actions
• 39edc8b Fix #275 change that broke tracing when rule return type is not Copy
• f05f348 Fix trace code in infix!{} for change to mixed_site hygiene
• 73e5579 Merge pull request #275 from neunenak/refactors
• Additional commits viewable in compare view

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[dependabot]

Superseded by #54.