Remap "rethrows" keyword to identifier in "@rethrows"

Author: DougGregor

Sources/SwiftParser/RawTokenKindSubset.swift

@@ -473,6 +473,14 @@ enum IdentifierOrRethrowsTokens: RawTokenKindSubset {
     case .rethrowsKeyword: return .rethrowsKeyword
     }
   }
+
+  var remappedKind: RawTokenKind? {
+    switch self {
+    case .rethrowsKeyword: return .identifier
+    default: return nil
+    }
+  }
+
 }
 
 enum Operator: RawTokenKindSubset {

Tests/SwiftParserTest/Attributes.swift

@@ -73,9 +73,12 @@ final class AttributeTests: XCTestCase {
   func testRethrowsAttribute() {
     AssertParse(
       """
-      @rethrows
+      @#^NAME^#rethrows
       protocol P { }
-      """
+      """,
+      { $0.parseDeclaration() },
+      substructure: Syntax(TokenSyntax.identifier("rethrows")),
+      substructureAfterMarker: "NAME"
     )
   }