unified: Add Swift node type schema generator - #22459
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Adds the SwiftSyntax-based schemagen tool and a manual wrapper for regenerating swift_node_types.yml after dependency updates. Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>
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Copilot review overview
Review tier: Balanced
Findings: 1
New issues introduced by this change (4)
| Severity | Finding |
|---|---|
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unified/swift-syntax-rs/schemagen/Sources/schemagen/main.swift — This hard-coded snapshot means regeneration will silently miss any new variable-text token kind… |
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unified/swift-syntax-rs/schemagen/Sources/schemagen/main.swift — This list is incomplete: swift-syntax also generates an unexpectedAfterX slot after the final… |
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unified/swift-syntax-rs/schemagen/README.md — The documented filter omits unexpectedAfterX, which swift-syntax generates after the final child.… |
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unified/swift-syntax-rs/schemagen/Sources/schemagen/main.swift — Add the missing “that” so this sentence is grammatical. |
What changed in this PR
Adds tooling to regenerate Swift extractor node types from pinned swift-syntax definitions.
Changes:
- Adds the Swift schema generator package and regeneration script.
- Marks the schema as generated and documents the workflow.
- Updates extractor and contributor documentation.
| File | Description |
|---|---|
unified/swift-syntax-rs/schemagen/Sources/schemagen/main.swift |
Generates the node schema. |
unified/swift-syntax-rs/schemagen/README.md |
Documents generator design and usage. |
unified/swift-syntax-rs/schemagen/Package.swift |
Defines the generator package. |
unified/swift-syntax-rs/schemagen/.gitignore |
Ignores generated dependencies and builds. |
unified/swift-syntax-rs/README.md |
Documents regeneration workflow. |
unified/scripts/regenerate-node-types.sh |
Resolves sources and runs generation. |
unified/extractor/swift_node_types.yml |
Adds generated-file headers. |
unified/extractor/src/languages/swift/adapter.rs |
Documents the schema’s generator. |
unified/AGENTS.md |
Updates contributor guidance. |
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| // Named-leaf ("varying") token kinds, mirroring the extractor adapter's | ||
| // VARYING_TOKEN_KINDS. Fixed tokens are anonymous (keyed by text) and are not | ||
| // matched by any rule, so they are not emitted here. | ||
| let varyingTokens = [ | ||
| "identifier", "integerLiteral", "floatLiteral", "stringSegment", | ||
| "binaryOperator", "prefixOperator", "postfixOperator", "dollarIdentifier", | ||
| "regexLiteralPattern", "rawStringPoundDelimiter", "regexPoundDelimiter", | ||
| "shebang", "unknown", | ||
| ] |
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| // swift-syntax error-recovery slots (`unexpectedBeforeX` and | ||
| // `unexpectedBetweenXAndY`) are never matched by rules. |
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| - `unexpectedBeforeX` and `unexpectedBetweenXAndY` error-recovery children are | ||
| dropped; no rule matches them. This filters on the child name: |
| "shebang", "unknown", | ||
| ] | ||
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| // The yeast type references a child maps to. A collection wrapper is elided by |
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Adds tooling for automatically updating
swift_node_types.ymlwhen new versions ofswift-syntaxare released.NB: I have not tested this process on macOS, but I have confirmed that it works well on Codespaces.