swiftlang/swift-syntax

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A set of Swift libraries for parsing, inspecting, generating, and transforming Swift source code.

Stars: 3.7k
Forks: 553
Open beginner issues: 0
Indexed issues: 80
Avg merge: 5d 13h
Merged PRs (30d): 16

Dominant language: Swift
License: Apache-2.0
Last GitHub push: Sep 16, 2026
Latest indexed: Sep 17, 2026
Contributing guide: Contributing guide
Code of conduct: Code of conduct
Beginner labels: good first issue

Open All

80 open issues indexed

[SR-778] Forgetting the in keyword can sometimes lead to compiling code Open

swiftlang/swift-syntax#2204 · 13 comments · 0 reactions · 0 assignees · Indexed Sep 17, 2026
[SR-8510] 'guard' is easy to misspell as 'gaurd', results in large number of follow-on errors, and could have a fixit. Open

SwiftParser

swiftlang/swift-syntax#2198 · 9 comments · 0 reactions · 0 assignees · Indexed Sep 17, 2026
[SR-11827] Missing "in" => bad diagnostic Open

SwiftParser

swiftlang/swift-syntax#2196 · 3 comments · 0 reactions · 0 assignees · Indexed Sep 17, 2026
[SR-16102] SwiftSyntax tree visitation exhausts stack space in background thread Open

swiftlang/swift-syntax#390 · 6 comments · 0 reactions · 0 assignees · Indexed Sep 17, 2026
swift-syntax compiles much more slowly with WMO enabled Open

swiftlang/swift-syntax#1194 · 5 comments · 1 reaction · 0 assignees · Indexed Sep 17, 2026
Improve diagnostics marked with TODO in `Tests/SwiftParser/translated` Open

enhancement good first issue SwiftParser

swiftlang/swift-syntax#1373 · 16 comments · 0 reactions · 0 assignees · Indexed Sep 17, 2026
BasicFormat indents closure parameter Open

BasicFormat

swiftlang/swift-syntax#1473 · 1 comment · 0 reactions · 0 assignees · Indexed Sep 17, 2026
BasicFormat should automatically determine indentation level of a file Open

BasicFormat enhancement

swiftlang/swift-syntax#1474 · 7 comments · 0 reactions · 0 assignees · Indexed Sep 17, 2026
Adds explicit overload for `ExpressibleByStringLiteral` syntax types Open

enhancement

swiftlang/swift-syntax#1507 · 5 comments · 0 reactions · 0 assignees · Indexed Sep 17, 2026
Add documentation for syntax nodes and their children Open

good first issue

swiftlang/swift-syntax#1528 · 6 comments · 0 reactions · 0 assignees · Indexed Sep 17, 2026
Braces are not always indented correctly when applying Fix-Its Open

SwiftParser

swiftlang/swift-syntax#1601 · 1 comment · 0 reactions · 0 assignees · Indexed Sep 17, 2026
Missing spacing when Fix-Its is applied in test case `testClassParsing` Open

SwiftParser

swiftlang/swift-syntax#1604 · 1 comment · 0 reactions · 0 assignees · Indexed Sep 17, 2026
Improve diagnostics for misspelt 'assocatedtype' Open

SwiftParser

swiftlang/swift-syntax#2180 · 4 comments · 0 reactions · 0 assignees · Indexed Sep 17, 2026
MemberAttributeMacro arguments have parents with SyntaxProtocol.expand() but not via compiler plugin Open

Macros

swiftlang/swift-syntax#1779 · 2 comments · 0 reactions · 0 assignees · Indexed Sep 17, 2026
Equality check fails for AttributeSyntax and SyntaxIdentifier when expanding attached macro Open

Macros

swiftlang/swift-syntax#1800 · 2 comments · 0 reactions · 0 assignees · Indexed Sep 17, 2026
SyntaxProtocol.expand() does not expand peer macros introduced by other macros Open

Macros

swiftlang/swift-syntax#1805 · 3 comments · 0 reactions · 0 assignees · Indexed Sep 17, 2026
Please add a `TriviaPiece.commentValue` property Open

enhancement good first issue

swiftlang/swift-syntax#1890 · 20 comments · 2 reactions · 1 assignee · Indexed Sep 17, 2026
No recovery when expecting `>` as a token prefix Open

SwiftParser

swiftlang/swift-syntax#1923 · 2 comments · 0 reactions · 0 assignees · Indexed Sep 17, 2026
Copying a node breaks its source location Open

swiftlang/swift-syntax#1961 · 2 comments · 0 reactions · 0 assignees · Indexed Sep 17, 2026
Refactor `IfConfigClauseSyntax` to disallow starting an if config clause with `#else` Open

swiftlang/swift-syntax#1971 · 1 comment · 0 reactions · 0 assignees · Indexed Sep 17, 2026
Add initializer to `LabeledExprSyntax` that automatically adds a colon if the label exists Open

enhancement good first issue

swiftlang/swift-syntax#1984 · 17 comments · 0 reactions · 1 assignee · Indexed Sep 17, 2026
For `SyntaxCollection`s with elements that conform to `HasTrailingComma` add `append` function that ensures the previous element has a trailing comma Open

enhancement

swiftlang/swift-syntax#1989 · 1 comment · 0 reactions · 0 assignees · Indexed Sep 17, 2026
Improve modeling token nodes Open

enhancement

swiftlang/swift-syntax#2010 · 1 comment · 0 reactions · 0 assignees · Indexed Sep 17, 2026
Improve SyntaxRewriter performance for operator folding Open

enhancement

swiftlang/swift-syntax#2036 · 1 comment · 0 reactions · 0 assignees · Indexed Sep 17, 2026
Add a high-level API to extract an argument from a `LabeledExprListSyntax` Open

enhancement

swiftlang/swift-syntax#2047 · 2 comments · 0 reactions · 0 assignees · Indexed Sep 17, 2026
MacroSystem expansion detached nodes lose diagnostic context Open

swiftlang/swift-syntax#2054 · 4 comments · 0 reactions · 0 assignees · Indexed Sep 17, 2026
`BasicFormat` indents closing `}` of closure passed as a function parameter Open

BasicFormat

swiftlang/swift-syntax#2082 · 10 comments · 0 reactions · 0 assignees · Indexed Sep 17, 2026
`BasicFormat` cannot indent closure body in tuple Open

BasicFormat

swiftlang/swift-syntax#2084 · 1 comment · 0 reactions · 0 assignees · Indexed Sep 17, 2026
Prevent unrelated casts using `as` Open

enhancement

swiftlang/swift-syntax#2092 · 11 comments · 0 reactions · 1 assignee · Indexed Sep 17, 2026
Required spacing is not added in `SwiftSyntaxBuilder` for interpolated syntax node Open

swiftlang/swift-syntax#2107 · 7 comments · 0 reactions · 0 assignees · Indexed Sep 17, 2026
ExpressionMacro trailing closure inherits code's original indentation Open

swiftlang/swift-syntax#2126 · 2 comments · 1 reaction · 0 assignees · Indexed Sep 17, 2026
GroupedDiagnostics does not handle notes on diagnostics Open

good first issue

swiftlang/swift-syntax#2166 · 2 comments · 1 reaction · 0 assignees · Indexed Sep 17, 2026
Enhancements to Macro Examples Open

enhancement

swiftlang/swift-syntax#2169 · 3 comments · 1 reaction · 0 assignees · Indexed Sep 17, 2026
`assertMacroExpansion` should emit an error if member macro is applied to declaration that can’t have members Open

good first issue Macros

swiftlang/swift-syntax#2206 · 9 comments · 0 reactions · 0 assignees · Indexed Sep 17, 2026
`assertMacroExpansion` should emit an error if macro is applied to node that is not a variable Open

Macros

swiftlang/swift-syntax#2207 · 2 comments · 0 reactions · 0 assignees · Indexed Sep 17, 2026
Diagnostic formatter should highlight trivia in between consecutive highlight nodes Open

enhancement

swiftlang/swift-syntax#2208 · 6 comments · 0 reactions · 1 assignee · Indexed Sep 17, 2026
Introduce Efficient Node Localization in Syntax Tree for Unit Tests Open

enhancement

swiftlang/swift-syntax#2251 · 2 comments · 0 reactions · 0 assignees · Indexed Sep 17, 2026
makeUniqueName() produces tokens that cannot be used as closure arguments Open

swiftlang/swift-syntax#2256 · 13 comments · 0 reactions · 0 assignees · Indexed Sep 17, 2026
Provide a public API to compare precedence groups Open

enhancement

swiftlang/swift-syntax#2258 · 3 comments · 0 reactions · 0 assignees · Indexed Sep 17, 2026
`AttributeRemover` outputs a leading newline in some cases Open

swiftlang/swift-syntax#2269 · 1 comment · 0 reactions · 0 assignees · Indexed Sep 17, 2026
Rethinking Diagnostic Order in Macro Expansion Assertions Open

enhancement

swiftlang/swift-syntax#2354 · 2 comments · 0 reactions · 0 assignees · Indexed Sep 17, 2026
Add Privacy Manifest Open

enhancement

swiftlang/swift-syntax#2377 · 3 comments · 0 reactions · 0 assignees · Indexed Sep 17, 2026
Distribute a prebuilt swift-syntax binary Open

enhancement

swiftlang/swift-syntax#2421 · 68 comments · 97 reactions · 0 assignees · Indexed Sep 17, 2026
All syntax nodes should have a `.text` property exposing the corresponding program text (sans trivia) Open

enhancement

swiftlang/swift-syntax#2448 · 1 comment · 0 reactions · 0 assignees · Indexed Sep 17, 2026
[macros] Further improve specializing generics in macros Open

swiftlang/swift-syntax#2476 · 1 comment · 0 reactions · 0 assignees · Indexed Sep 17, 2026
Windows builds for macro targets in release mode break the compiler Open

swiftlang/swift-syntax#2483 · 14 comments · 0 reactions · 0 assignees · Indexed Sep 17, 2026
FunctionDecl and similar should have method to get name as "hello(name:surname:)" Open

enhancement

swiftlang/swift-syntax#2488 · 2 comments · 0 reactions · 1 assignee · Indexed Sep 17, 2026
Enhance Feedback Mechanism for local-pr-precheck command Open

enhancement

swiftlang/swift-syntax#2500 · 1 comment · 0 reactions · 0 assignees · Indexed Sep 17, 2026
Request for Documentation on Parsing Rules for Trivia in swift-syntax Open

enhancement

swiftlang/swift-syntax#2582 · 2 comments · 1 reaction · 0 assignees · Indexed Sep 17, 2026
Setting of Swift_MODULE_DIRECTORY (and probably other directories) inappropriate. Open

swiftlang/swift-syntax#2680 · 3 comments · 0 reactions · 0 assignees · Indexed Sep 17, 2026

swiftlang/swift-syntax

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