Fix unused parameter analysis for parameters with name enclosed by backticks. Closes #973

Author: ileitch

CHANGELOG.md

@@ -16,6 +16,7 @@
 - Fix unused import false-positive for modules that export unindexed modules.
 - Exclude conditionally imported modules from unused import detection, as they may provide symbols for code that was not compiled.
 - Fix `--retain-assign-only-property-types` for properties with trailing comments.
+- Fix unused parameter analysis for parameters with name enclosed by backticks.
 
 ## 3.2.0 (2025-06-27)
 

Sources/SyntaxAnalysis/UnusedParameterParser.swift

@@ -211,8 +211,8 @@ struct UnusedParameterParser {
         let positionSyntax: SyntaxProtocol = syntax.secondName ?? syntax.firstName
         let location = sourceLocation(of: positionSyntax.positionAfterSkippingLeadingTrivia)
 
-        return Parameter(firstName: syntax.firstName.text,
-                         secondName: syntax.secondName?.text,
+        return Parameter(firstName: syntax.firstName.identifier?.name,
+                         secondName: syntax.secondName?.identifier?.name,
                          metatype: metatype,
                          location: location)
     }

Tests/Fixtures/Sources/UnusedParameterFixtures/testBackquote.swift

@@ -0,0 +1,6 @@
+class SyntaxFixture22 {
+    func myFunc(class: String, func: String, `otherUsed`: String, `otherUnused`: String) {
+        print(`class`)
+        print(`otherUsed`)
+    }
+}

Tests/Fixtures/Sources/UnusedParameterFixtures/testBackticks.swift

@@ -195,10 +195,13 @@ final class UnusedParameterTest: XCTestCase {
         assertUsed("param", in: "myFunc(param:)")
     }
 
-    func testBackquote() {
+    func testBackticks() {
         analyze()
-        assertUsed("class", in: "myFunc(class:func:)")
-        assertUnused("func", in: "myFunc(class:func:)")
+        assertUsed("class", in: "myFunc(class:func:otherUsed:otherUnused:)")
+        assertUsed("otherUsed", in: "myFunc(class:func:otherUsed:otherUnused:)")
+
+        assertUnused("func", in: "myFunc(class:func:otherUsed:otherUnused:)")
+        assertUnused("otherUnused", in: "myFunc(class:func:otherUsed:otherUnused:)")
     }
 
     // MARK: - Private