Lambda expressions (no closures yet).

compiler/testData/ir/irText/expressions/variableAsFunctionCall.txt

@@ -2,7 +2,12 @@ FILE /variableAsFunctionCall.kt
   FUN public fun kotlin.String.k(): () -> kotlin.String
     BLOCK_BODY
       RETURN type=kotlin.Nothing
-        DUMMY KtLambdaExpression type=() -> kotlin.String
+        BLOCK type=() -> kotlin.String operator=LAMBDA
+          FUN local final fun <anonymous>(): kotlin.String
+            BLOCK_BODY
+              RETURN type=kotlin.Nothing
+                $RECEIVER of: k type=kotlin.String
+          CALLABLE_REFERENCE local final fun <anonymous>(): kotlin.String type=() -> kotlin.String
   FUN public fun test1(/*0*/ f: () -> kotlin.Unit): kotlin.Unit
     BLOCK_BODY
       RETURN type=kotlin.Nothing

compiler/testData/ir/irText/lambdas/extensionLambda.kt

@@ -0,0 +1 @@
+fun test1() = "42".run { length }

compiler/testData/ir/irText/lambdas/extensionLambda.txt

@@ -0,0 +1,13 @@
+FILE /extensionLambda.kt
+  FUN public fun test1(): kotlin.Int
+    BLOCK_BODY
+      RETURN type=kotlin.Nothing
+        CALL .run type=kotlin.Int operator=null
+          $receiver: CONST String type=kotlin.String value='42'
+          block: BLOCK type=kotlin.String.() -> kotlin.Int operator=LAMBDA
+            FUN local final fun kotlin.String.<anonymous>(): kotlin.Int
+              BLOCK_BODY
+                RETURN type=kotlin.Nothing
+                  CALL .<get-length> type=kotlin.Int operator=GET_PROPERTY
+                    $this: $RECEIVER of: <anonymous> type=kotlin.String
+            CALLABLE_REFERENCE local final fun kotlin.String.<anonymous>(): kotlin.Int type=kotlin.String.() -> kotlin.Int

compiler/testData/ir/irText/lambdas/justLambda.kt

@@ -0,0 +1 @@
+val lambda = { 42 }

compiler/testData/ir/irText/lambdas/justLambda.txt

@@ -0,0 +1,9 @@
+FILE /justLambda.kt
+  PROPERTY public val lambda: () -> kotlin.Int getter=null setter=null
+    EXPRESSION_BODY
+      BLOCK type=() -> kotlin.Int operator=LAMBDA
+        FUN local final fun <anonymous>(): kotlin.Int
+          BLOCK_BODY
+            RETURN type=kotlin.Nothing
+              CONST Int type=kotlin.Int value='42'
+        CALLABLE_REFERENCE local final fun <anonymous>(): kotlin.Int type=() -> kotlin.Int

compiler/testData/ir/irText/lambdas/multipleImplicitReceivers.kt

@@ -0,0 +1,20 @@
+object A
+object B
+
+interface IFoo {
+    val A.foo: B get() = B
+}
+
+interface IInvoke {
+    operator fun B.invoke() = 42
+}
+
+fun test(fooImpl: IFoo, invokeImpl: IInvoke) {
+    with(A) {
+        with(fooImpl) {
+            with(invokeImpl) {
+                foo()
+            }
+        }
+    }
+}

compiler/testData/ir/irText/lambdas/multipleImplicitReceivers.txt

@@ -0,0 +1,42 @@
+FILE /multipleImplicitReceivers.kt
+  CLASS OBJECT A
+  CLASS OBJECT B
+  CLASS INTERFACE IFoo
+    PROPERTY public open val A.foo: B getter=<get-foo> setter=null
+    PROPERTY_GETTER public open fun A.<get-foo>(): B property=foo
+      BLOCK_BODY
+        RETURN type=kotlin.Nothing
+          GET_OBJECT B type=B
+  CLASS INTERFACE IInvoke
+    FUN public open operator fun B.invoke(): kotlin.Int
+      BLOCK_BODY
+        RETURN type=kotlin.Nothing
+          CONST Int type=kotlin.Int value='42'
+  FUN public fun test(/*0*/ fooImpl: IFoo, /*1*/ invokeImpl: IInvoke): kotlin.Unit
+    BLOCK_BODY
+      CALL .with type=kotlin.Int operator=null
+        receiver: GET_OBJECT A type=A
+        block: BLOCK type=A.() -> kotlin.Int operator=LAMBDA
+          FUN local final fun A.<anonymous>(): kotlin.Int
+            BLOCK_BODY
+              RETURN type=kotlin.Nothing
+                CALL .with type=kotlin.Int operator=null
+                  receiver: GET_VAR fooImpl type=IFoo operator=null
+                  block: BLOCK type=IFoo.() -> kotlin.Int operator=LAMBDA
+                    FUN local final fun IFoo.<anonymous>(): kotlin.Int
+                      BLOCK_BODY
+                        RETURN type=kotlin.Nothing
+                          CALL .with type=kotlin.Int operator=null
+                            receiver: GET_VAR invokeImpl type=IInvoke operator=null
+                            block: BLOCK type=IInvoke.() -> kotlin.Int operator=LAMBDA
+                              FUN local final fun IInvoke.<anonymous>(): kotlin.Int
+                                BLOCK_BODY
+                                  RETURN type=kotlin.Nothing
+                                    CALL .invoke type=kotlin.Int operator=INVOKE
+                                      $this: $RECEIVER of: <anonymous> type=IInvoke
+                                      $receiver: CALL .<get-foo> type=B operator=GET_PROPERTY
+                                        $this: $RECEIVER of: <anonymous> type=IFoo
+                                        $receiver: $RECEIVER of: <anonymous> type=A
+                              CALLABLE_REFERENCE local final fun IInvoke.<anonymous>(): kotlin.Int type=IInvoke.() -> kotlin.Int
+                    CALLABLE_REFERENCE local final fun IFoo.<anonymous>(): kotlin.Int type=IFoo.() -> kotlin.Int
+          CALLABLE_REFERENCE local final fun A.<anonymous>(): kotlin.Int type=A.() -> kotlin.Int