MaibornWolff · Nereboss · Nov 13, 2025 · Nov 11, 2025 · Nov 11, 2025 · Nov 12, 2025
diff --git a/analysis/CHANGELOG.md b/analysis/CHANGELOG.md
@@ -13,6 +13,7 @@ and this project adheres to [Semantic Versioning](http://semver.org/)
 - UnifiedParser now automatically uses `.gitignore` files for file exclusion [#4254](https://github.com/MaibornWolff/codecharta/issues/4254)
 - RawTextParser now automatically uses `.gitignore` files for file exclusion [#4273](https://github.com/MaibornWolff/codecharta/issues/4273)
 - Add swift support to unifiedparser [#4335](https://github.com/MaibornWolff/codecharta/issues/4335)
+- Add Objective-C support to unifiedparser [#4361](https://github.com/MaibornWolff/codecharta/issues/4361)
 - GitLogParser is now able to find commits that contain the word hotfixes
 - Add four code smell metrics to unifiedparser [#4315](https://github.com/MaibornWolff/codecharta/issues/4315) and [#4353](https://github.com/MaibornWolff/codecharta/issues/4353)
   - long function

diff --git a/analysis/analysers/parsers/UnifiedParser/README.md b/analysis/analysers/parsers/UnifiedParser/README.md
@@ -6,21 +6,22 @@ The Unified Parser is parser to generate code metrics from a source code file or
 
 ## Supported Languages
 
-| Language   | Supported file extensions              |
-|------------|----------------------------------------|
-| Javascript | .js, .cjs, .mjs                        |
-| Typescript | .ts, .cts, .mts                        |
-| Java       | .java                                  |
-| Kotlin     | .kt                                    |
-| C#         | .cs                                    |
-| C++        | .cpp, .cc, .cxx, .c++, .hh, .hpp, .hxx |
-| C          | .c, .h                                 |
-| Python     | .py                                    |
-| Go         | .go                                    |
-| PHP        | .php                                   |
-| Ruby       | .rb                                    |
-| Swift      | .swift                                 |
-| Bash       | .sh                                    |
+| Language     | Supported file extensions              |
+|--------------|----------------------------------------|
+| Javascript   | .js, .cjs, .mjs                        |
+| Typescript   | .ts, .cts, .mts                        |
+| Java         | .java                                  |
+| Kotlin       | .kt                                    |
+| C#           | .cs                                    |
+| C++          | .cpp, .cc, .cxx, .c++, .hh, .hpp, .hxx |
+| C            | .c, .h                                 |
+| Objective-C  | .m                                     |
+| Python       | .py                                    |
+| Go           | .go                                    |
+| PHP          | .php                                   |
+| Ruby         | .rb                                    |
+| Swift        | .swift                                 |
+| Bash         | .sh                                    |
 
 ## Supported Metrics
 
@@ -101,6 +102,7 @@ cat pipeInput.cc.json | ccsh unifiedparser src/test/resources - -o merged.cc.jso
 ## Known issues
 
 - In ruby the 'lambda' keyword is not counted correctly for complexity and number of functions
+- In C/C++/ObjectiveC the using `void` as a parameter counts as 1 for parameters per function
 
 ## Extending the UnifiedParser
 

diff --git a/analysis/analysers/parsers/UnifiedParser/build.gradle.kts b/analysis/analysers/parsers/UnifiedParser/build.gradle.kts
@@ -21,6 +21,7 @@ dependencies {
     implementation(libs.treesitter.php)
     implementation(libs.treesitter.ruby)
     implementation(libs.treesitter.swift)
+    implementation(libs.treesitter.objc)
     implementation(libs.treesitter.bash)
 
     testImplementation(libs.jsonassert)

diff --git a/...maibornwolff/codecharta/analysers/parsers/unified/metriccollectors/AvailableCollectors.kt b/...maibornwolff/codecharta/analysers/parsers/unified/metriccollectors/AvailableCollectors.kt
@@ -9,6 +9,7 @@ enum class AvailableCollectors(
     TYPESCRIPT(FileExtension.TYPESCRIPT, ::TypescriptCollector),
     JAVASCRIPT(FileExtension.JAVASCRIPT, ::JavascriptCollector),
     KOTLIN(FileExtension.KOTLIN, ::KotlinCollector),
+    OBJECTIVE_C(FileExtension.OBJECTIVE_C, ::ObjectiveCCollector),
     JAVA(FileExtension.JAVA, ::JavaCollector),
     CSHARP(FileExtension.CSHARP, ::CSharpCollector),
     CPP(FileExtension.CPP, ::CppCollector),

diff --git a/...maibornwolff/codecharta/analysers/parsers/unified/metriccollectors/ObjectiveCCollector.kt b/...maibornwolff/codecharta/analysers/parsers/unified/metriccollectors/ObjectiveCCollector.kt
@@ -0,0 +1,9 @@
+package de.maibornwolff.codecharta.analysers.parsers.unified.metriccollectors
+
+import de.maibornwolff.codecharta.analysers.parsers.unified.metricnodetypes.ObjectiveCNodeTypes
+import org.treesitter.TreeSitterObjc
+
+class ObjectiveCCollector : MetricCollector(
+    treeSitterLanguage = TreeSitterObjc(),
+    nodeTypeProvider = ObjectiveCNodeTypes()
+)
diff --git a/.../maibornwolff/codecharta/analysers/parsers/unified/metricnodetypes/ObjectiveCNodeTypes.kt b/.../maibornwolff/codecharta/analysers/parsers/unified/metricnodetypes/ObjectiveCNodeTypes.kt
@@ -0,0 +1,86 @@
+package de.maibornwolff.codecharta.analysers.parsers.unified.metricnodetypes
+
+class ObjectiveCNodeTypes : MetricNodeTypes {
+    override val logicComplexityNodeTypes = TreeNodeTypes(
+        simpleNodeTypes = setOf(
+            // if
+            "if_statement",
+            // loop
+            "for_statement",
+            "while_statement",
+            "do_statement",
+            // case
+            "case_statement",
+            // catch
+            "@catch",
+            // ternary
+            "conditional_expression"
+        ),
+        nestedNodeTypes = setOf(
+            // logical operators (&&, ||)
+            NestedNodeType(
+                baseNodeType = "binary_expression",
+                childNodeFieldName = "operator",
+                childNodeTypes = setOf("&&", "||")
+            )
+        )
+    )
+
+    override val functionComplexityNodeTypes = TreeNodeTypes(
+        simpleNodeTypes = setOf(
+            // C functions
+            "function_definition",
+            // Blocks (Objective-C closures)
+            "block_expression"
+        )
+    )
+
+    override val commentLineNodeTypes = TreeNodeTypes(
+        simpleNodeTypes = setOf(
+            "comment"
+        )
+    )
+
+    override val numberOfFunctionsNodeTypes = TreeNodeTypes(
+        simpleNodeTypes = setOf(
+            // C functions
+            "function_definition",
+            // Objective-C methods
+            "method_definition"
+        )
+    )
+
+    override val functionBodyNodeTypes = TreeNodeTypes(
+        simpleNodeTypes = setOf(
+            "compound_statement"
+        )
+    )
+
+    override val functionParameterNodeTypes = TreeNodeTypes(
+        simpleNodeTypes = setOf(
+            // C function parameters
+            "parameter_declaration",
+            // Objective-C method parameters
+            "keyword_declarator"
+        )
+    )
+
+    override val messageChainsNodeTypes = TreeNodeTypes(
+        simpleNodeTypes = setOf(
+            // C-style function calls and field access
+            "call_expression",
+            "field_expression",
+            // Objective-C message sends
+            "message_expression"
+        )
+    )
+
+    override val messageChainsCallNodeTypes = TreeNodeTypes(
+        simpleNodeTypes = setOf(
+            // C-style function calls
+            "call_expression",
+            // Objective-C message sends
+            "message_expression"
+        )
+    )
+}
diff --git a/...src/test/kotlin/de/maibornwolff/codecharta/analysers/parsers/unified/UnifiedParserTest.kt b/...src/test/kotlin/de/maibornwolff/codecharta/analysers/parsers/unified/UnifiedParserTest.kt
@@ -37,6 +37,7 @@ class UnifiedParserTest {
             Arguments.of("java", ".java"),
             Arguments.of("javascript", ".js"),
             Arguments.of("kotlin", ".kt"),
+            Arguments.of("objectiveC", ".m"),
             Arguments.of("php", ".php"),
             Arguments.of("python", ".py"),
             Arguments.of("ruby", ".rb"),

diff --git a/...n/de/maibornwolff/codecharta/analysers/parsers/unified/metriccollectors/CCollectorTest.kt b/...n/de/maibornwolff/codecharta/analysers/parsers/unified/metriccollectors/CCollectorTest.kt
@@ -97,15 +97,13 @@ class CCollectorTest {
     fun `should count set except clause for complexity`() {
         // given
         val fileContent = """
-            int main() {
-                __try
-                {
-                    TestExceptions();
-                }
-                __except(EXCEPTION_EXECUTE_HANDLER)
-                {
-                    printf("Executing SEH __except block\\n");
-                }
+            __try
+            {
+                TestExceptions();
+            }
+            __except(EXCEPTION_EXECUTE_HANDLER)
+            {
+                printf("Executing SEH __except block\\n");
             }
         """.trimIndent()
         val input = createTestFile(fileContent)
@@ -114,7 +112,7 @@ class CCollectorTest {
         val result = collector.collectMetricsForFile(input)
 
         // then
-        Assertions.assertThat(result.attributes[AvailableFileMetrics.COMPLEXITY.metricName]).isEqualTo(2.0)
+        Assertions.assertThat(result.attributes[AvailableFileMetrics.COMPLEXITY.metricName]).isEqualTo(1.0)
     }
 
     @Test

diff --git a/...de/maibornwolff/codecharta/analysers/parsers/unified/metriccollectors/CppCollectorTest.kt b/...de/maibornwolff/codecharta/analysers/parsers/unified/metriccollectors/CppCollectorTest.kt
@@ -144,15 +144,13 @@ class CppCollectorTest {
     fun `should count seh-except clause for complexity`() {
         // given
         val fileContent = """
-            int main() {
-                __try
-                {
-                    TestExceptions();
-                }
-                __except(EXCEPTION_EXECUTE_HANDLER)
-                {
-                    printf("Executing SEH __except block\n");
-                }
+            __try
+            {
+                TestExceptions();
+            }
+            __except(EXCEPTION_EXECUTE_HANDLER)
+            {
+                printf("Executing SEH __except block\n");
             }
         """.trimIndent()
         val input = createTestFile(fileContent)
@@ -161,7 +159,7 @@ class CppCollectorTest {
         val result = collector.collectMetricsForFile(input)
 
         // then
-        Assertions.assertThat(result.attributes[AvailableFileMetrics.COMPLEXITY.metricName]).isEqualTo(2.0)
+        Assertions.assertThat(result.attributes[AvailableFileMetrics.COMPLEXITY.metricName]).isEqualTo(1.0)
     }
 
     @Test