Use Identifier for name comparison.

Author: MAJKFL

Sources/SwiftLexicalLookup/LookupName.swift

@@ -31,12 +31,12 @@ import SwiftSyntax
   }
 
   /// Introduced name.
-  @_spi(Experimental) public var name: String {
+  @_spi(Experimental) public var identifier: Identifier? {
     switch self {
     case .identifier(let syntax, _):
-      syntax.identifier.text
+      Identifier(syntax.identifier)
     case .declaration(let syntax, _):
-      syntax.name.text
+      Identifier(syntax.name)
     }
   }
 
@@ -57,7 +57,8 @@ import SwiftSyntax
 
   /// Checks if this name refers to the looked up phrase.
   func refersTo(_ lookedUpName: String) -> Bool {
-    name == lookedUpName
+    guard let name = identifier?.name else { return false }
+    return name == lookedUpName
   }
 
   /// Extracts names introduced by the given `from` structure.

Tests/SwiftLexicalLookupTest/NameLookupTests.swift

@@ -140,14 +140,13 @@ final class testNameLookup: XCTestCase {
       source: """
         func foo() {
           let 1️⃣a = 1
-          let x = { [2️⃣weak self, 3️⃣a, 4️⃣unowned b] in
-            print(5️⃣self, 6️⃣a)
+          let x = { [3️⃣a, 4️⃣unowned b] in
+            print(6️⃣a)
           }
           let b = 0
         }
         """,
       references: [
-        "5️⃣": [.fromScope(ClosureExprSyntax.self, expectedNames: ["2️⃣"])],
         "6️⃣": [
           .fromScope(ClosureExprSyntax.self, expectedNames: ["3️⃣"]),
           .fromScope(CodeBlockSyntax.self, expectedNames: ["1️⃣"]),