FIR: partially implement invoke resolution

compiler/fir/resolve/testData/resolve/expresssions/invoke/explicitReceiver.txt

@@ -13,8 +13,8 @@ FILE: explicitReceiver.kt
             ^invoke this#
         }
 
-        public final fun bar(): R|kotlin/Unit| {
-            ^bar R|/x|()
+        public final fun bar(): R|Foo| {
+            ^bar R|/Foo.x|.R|/Foo.invoke|()
         }
 
     }

compiler/fir/resolve/testData/resolve/expresssions/invoke/explicitReceiver2.txt

@@ -23,8 +23,8 @@ FILE: explicitReceiver2.kt
         public final val x: R|Bar| = R|/Bar.Bar|()
             public get(): R|Bar|
 
-        public final fun bar(): R|kotlin/Unit| {
-            ^bar R|/x|()
+        public final fun bar(): R|Foo| {
+            ^bar R|/Foo.x|.R|/Bar.invoke|()
         }
 
     }

compiler/fir/resolve/testData/resolve/expresssions/invoke/extension.kt

@@ -7,5 +7,5 @@ class Foo {
 
     val x = 0
 
-    fun foo() = x()
+    fun foo() = x() // should resolve to invoke
 }

compiler/fir/resolve/testData/resolve/expresssions/invoke/farInvokeExtension.kt

@@ -8,5 +8,5 @@ class Foo {
 
     val x = 0
 
-    fun foo() = x()
+    fun foo() = x() // should resolve to fun x
 }

compiler/fir/resolve/testData/resolve/expresssions/invoke/implicitTypeOrder.kt

@@ -1,6 +1,6 @@
 
 class A {
-    fun bar() = foo()
+    fun bar() = foo() // should resolve to invoke
 
     fun invoke() = this
 }

compiler/fir/resolve/testData/resolve/expresssions/invoke/implicitTypeOrder.txt

@@ -4,8 +4,8 @@ FILE: implicitTypeOrder.kt
             super<R|kotlin/Any|>()
         }
 
-        public final fun bar(): <ERROR TYPE REF: Unresolved name: foo> {
-            ^bar <Unresolved name: foo>#()
+        public final fun bar(): R|A| {
+            ^bar R|/foo|.R|/A.invoke|()
         }
 
         public final fun invoke(): R|A| {

compiler/fir/resolve/testData/resolve/expresssions/invoke/simple.kt

@@ -0,0 +1,7 @@
+class Simple {
+    operator fun invoke(): String = "invoke"
+}
+
+fun test(s: Simple) {
+    val result = s()
+}

compiler/fir/resolve/testData/resolve/expresssions/invoke/simple.txt

@@ -0,0 +1,14 @@
+FILE: simple.kt
+    public final class Simple : R|kotlin/Any| {
+        public constructor(): R|Simple| {
+            super<R|kotlin/Any|>()
+        }
+
+        public final operator fun invoke(): R|kotlin/String| {
+            ^invoke String(invoke)
+        }
+
+    }
+    public final fun test(s: R|Simple|): R|kotlin/Unit| {
+        lval result: R|kotlin/String| = R|<local>/s|.R|/Simple.invoke|()
+    }

compiler/fir/resolve/testData/resolve/functionTypes.kt

@@ -1,4 +1,4 @@
-fun <T> simpleRun(f: (T) -> Unit): Unit = f()
+fun <T> simpleRun(f: (T) -> Unit): Unit = f(return)
 
 fun <T, R> List<T>.simpleMap(f: (T) -> R): R {
 

compiler/fir/resolve/testData/resolve/functionTypes.txt

@@ -1,6 +1,6 @@
 FILE: functionTypes.kt
     public final fun <T> simpleRun(f: R|kotlin/Function1<T, kotlin/Unit>|): R|kotlin/Unit| {
-        ^simpleRun <Unresolved name: f>#()
+        ^simpleRun R|<local>/f|.R|FakeOverride<kotlin/Function1.invoke: R|kotlin/Unit|>|(^simpleRun Unit)
     }
     public final fun <T, R> R|kotlin/collections/List<T>|.simpleMap(f: R|kotlin/Function1<T, R>|): R|R| {
     }