Kotlin: Support apply

java/ql/lib/change-notes/2023-07-10-kotlin-apply.md

@@ -0,0 +1,4 @@
+---
+category: minorAnalysis
+---
+* Added support for the Kotlin method `apply`.

java/ql/lib/ext/kotlin.model.yml

@@ -3,5 +3,7 @@ extensions:
       pack: codeql/java-all
       extensible: summaryModel
     data:
+      - ["kotlin", "StandardKt", False, "apply", "", "", "Argument[0]", "Argument[1].Parameter[0]", "value", "manual"]
+      - ["kotlin", "StandardKt", False, "apply", "", "", "Argument[0]", "ReturnValue", "value", "manual"]
       - ["kotlin", "StandardKt", False, "with", "", "", "Argument[0]", "Argument[1].Parameter[0]", "value", "manual"]
       - ["kotlin", "StandardKt", False, "with", "", "", "Argument[1].ReturnValue", "ReturnValue", "value", "manual"]

java/ql/lib/semmle/code/java/frameworks/kotlin/Kotlin.qll

@@ -0,0 +1,21 @@
+/** Provides classes and predicates related to `kotlin`. */
+
+import java
+
+/** A call to Kotlin's `apply` method. */
+class KotlinApply extends MethodAccess {
+  ExtensionMethod m;
+
+  KotlinApply() {
+    this.getMethod() = m and
+    m.hasQualifiedName("kotlin", "StandardKt", "apply")
+  }
+
+  /** Gets the function block argument of this call. */
+  LambdaExpr getLambdaArg() {
+    result = this.getArgument(m.getExtensionReceiverParameterIndex() + 1)
+  }
+
+  /** Gets the receiver argument of this call. */
+  Argument getReceiver() { result = this.getArgument(m.getExtensionReceiverParameterIndex()) }
+}