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fix: Parsing nested generics #1319

Merged
merged 8 commits into from
May 8, 2023
Merged

fix: Parsing nested generics #1319

merged 8 commits into from
May 8, 2023

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jfecher
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@jfecher jfecher commented May 8, 2023

Related issue(s)

Resolves #1316

Description

Summary of changes

Generics always expect to end with a Token::Greater, however nested generics would use the syntax A<B<T>> where the final token(s) would be a Token::ShiftRight rather than two separate greater-than tokens.

Changing the type parser to also handle right shifts would be difficult as the shift would have to terminate two levels of nesting in the recursive parser. I opted instead for the other route of changing the lexer to always issue two greater-than tokens rather than combining them. From there I needed to add a few special cases in expression operators and the assign-operator shorthands.

Dependency additions / changes

Test additions / changes

Added a small regression test line in the generics test.

Checklist

  • I have tested the changes locally.
  • I have formatted the changes with Prettier and/or cargo fmt with default settings.
  • I have linked this PR to the issue(s) that it resolves.
  • I have reviewed the changes on GitHub, line by line.
  • I have ensured all changes are covered in the description.

Documentation needs

  • This PR requires documentation updates when merged.

Additional context

BEGIN_COMMIT_OVERRIDE
fix: Fix issue with parsing nested generics (#1319)
END_COMMIT_OVERRIDE

Co-authored-by: kevaundray <kevtheappdev@gmail.com>
jfecher and others added 2 commits May 8, 2023 14:52
Co-authored-by: kevaundray <kevtheappdev@gmail.com>
@kevaundray kevaundray enabled auto-merge May 8, 2023 22:02
@kevaundray kevaundray added this pull request to the merge queue May 8, 2023
Merged via the queue into master with commit 36f5b8e May 8, 2023
@kevaundray kevaundray deleted the jf/parse-nested-generics branch May 8, 2023 22:54
TomAFrench added a commit that referenced this pull request May 17, 2023
* master: (66 commits)
  feat(nargo)!: retire print-acir in favour of flag (#1328)
  chore(ssa): enable cse for assert (#1350)
  chore(ssa refactor): Add basic instruction simplification (#1329)
  chore(noir): Release 0.6.0 (#1279)
  feat: enable to_radix for any field element (#1343)
  chore(ssa refactor): Simplify inlining pass and fix inlining failure (#1337)
  chore!: Update to acvm 0.11.0 (#1322)
  feat: Add ECDSA secp256k1 builtin test (#1294)
  chore: add support for encoding/decoding inputs from JSON (#1325)
  feat: Issue an error when attempting to use a `return` expression (#1330)
  chore(ssa refactor): Fix inlining bug (#1335)
  fix: to-bits and to-radix for > 128 bits (#1312)
  chore(parser): Parser error optimisation (#1292)
  chore(ssa refactor): Implement function inlining (#1293)
  chore: fix installation link in readme (#1326)
  chore: fix installation link in readme (#1326)
  feat(stdlib): Add keccak (#1249)
  fix: Parsing nested generics (#1319)
  chore(ssa refactor): Document some SSA-gen functions (#1321)
  fix: Assigning to tuple fields (#1318)
  ...
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Nested generic syntax broken?
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