Add "Control flow with empty body" inspection

#KT-30970 Fixed

idea/testData/inspectionsLocal/controlFlowWithEmptyBody/.inspection

@@ -0,0 +1 @@
+org.jetbrains.kotlin.idea.inspections.ControlFlowWithEmptyBodyInspection

idea/testData/inspectionsLocal/controlFlowWithEmptyBody/also/anonymousFunction.kt

@@ -0,0 +1,8 @@
+// PROBLEM: 'also' has empty body
+// FIX: none
+// WITH_RUNTIME
+
+fun test() {
+    42.<caret>also(fun(it: Int) {
+    })
+}

idea/testData/inspectionsLocal/controlFlowWithEmptyBody/also/anonymousFunctionHasStatement.kt

@@ -0,0 +1,9 @@
+// PROBLEM: none
+// FIX: none
+// WITH_RUNTIME
+
+fun test() {
+    42.<caret>also(fun(it: Int) {
+        println(it)
+    })
+}

idea/testData/inspectionsLocal/controlFlowWithEmptyBody/also/block.kt

@@ -0,0 +1,8 @@
+// PROBLEM: 'also' has empty body
+// FIX: none
+// WITH_RUNTIME
+
+fun test(i: Int) {
+    i.<caret>also {
+    }
+}

idea/testData/inspectionsLocal/controlFlowWithEmptyBody/also/block2.kt

@@ -0,0 +1,7 @@
+// PROBLEM: 'also' has empty body
+// FIX: none
+// WITH_RUNTIME
+
+fun test() {
+    42.<caret>also({ })
+}

idea/testData/inspectionsLocal/controlFlowWithEmptyBody/also/blockHasComment.kt

@@ -0,0 +1,9 @@
+// PROBLEM: 'also' has empty body
+// FIX: none
+// WITH_RUNTIME
+
+fun test(i: Int) {
+    i.<caret>also {
+        // comment
+    }
+}

idea/testData/inspectionsLocal/controlFlowWithEmptyBody/also/blockHasStatement.kt

@@ -0,0 +1,10 @@
+// PROBLEM: none
+// WITH_RUNTIME
+
+fun test(i: Int) {
+    i.<caret>also {
+        foo()
+    }
+}
+
+fun foo() {}

idea/testData/inspectionsLocal/controlFlowWithEmptyBody/also/blockHasStatement2.kt

@@ -0,0 +1,6 @@
+// PROBLEM: none
+// WITH_RUNTIME
+
+fun test() {
+    42.<caret>also({ println(it) })
+}

idea/testData/inspectionsLocal/controlFlowWithEmptyBody/also/functionReference.kt

@@ -0,0 +1,6 @@
+// PROBLEM: none
+// WITH_RUNTIME
+
+fun test() {
+    42.<caret>also(::println)
+}

idea/testData/inspectionsLocal/controlFlowWithEmptyBody/also/implicitReceiver.kt

@@ -0,0 +1,7 @@
+// PROBLEM: 'also' has empty body
+// FIX: none
+// WITH_RUNTIME
+
+fun String.test() {
+    <caret>also {  }
+}

idea/testData/inspectionsLocal/controlFlowWithEmptyBody/doWhile/block.kt

@@ -0,0 +1,7 @@
+// PROBLEM: 'do while' has empty body
+// FIX: none
+
+fun test(i: Int) {
+    <caret>do {
+    } while (i == 1)
+}

idea/testData/inspectionsLocal/controlFlowWithEmptyBody/doWhile/blockHasComment.kt

@@ -0,0 +1,8 @@
+// PROBLEM: 'do while' has empty body
+// FIX: none
+
+fun test(i: Int) {
+    <caret>do {
+        // comment
+    } while (i == 1)
+}

idea/testData/inspectionsLocal/controlFlowWithEmptyBody/doWhile/blockHasStatement.kt

@@ -0,0 +1,9 @@
+// PROBLEM: none
+
+fun test(i: Int) {
+    <caret>do {
+        foo()
+    } while (i == 1)
+}
+
+fun foo() {}

idea/testData/inspectionsLocal/controlFlowWithEmptyBody/doWhile/single.kt

@@ -0,0 +1,6 @@
+// PROBLEM: 'do while' has empty body
+// FIX: none
+
+fun test(i: Int) {
+    <caret>do while (i == 1)
+}

idea/testData/inspectionsLocal/controlFlowWithEmptyBody/doWhile/singleHasStatement.kt

@@ -0,0 +1,7 @@
+// PROBLEM: none
+
+fun test(i: Int) {
+    <caret>do foo() while (i == 1)
+}
+
+fun foo() {}

idea/testData/inspectionsLocal/controlFlowWithEmptyBody/for/block.kt

@@ -0,0 +1,7 @@
+// PROBLEM: 'for' has empty body
+// FIX: none
+
+fun test() {
+    <caret>for (i in 1..10) {
+    }
+}

idea/testData/inspectionsLocal/controlFlowWithEmptyBody/for/blockHasComment.kt

@@ -0,0 +1,8 @@
+// PROBLEM: 'for' has empty body
+// FIX: none
+
+fun test() {
+    <caret>for (i in 1..10) {
+        // comment
+    }
+}

idea/testData/inspectionsLocal/controlFlowWithEmptyBody/for/blockHasStatement.kt

@@ -0,0 +1,9 @@
+// PROBLEM: none
+
+fun test() {
+    <caret>for (i in 1..10) {
+        foo()
+    }
+}
+
+fun foo() {}

idea/testData/inspectionsLocal/controlFlowWithEmptyBody/for/single.kt

@@ -0,0 +1,6 @@
+// PROBLEM: 'for' has empty body
+// FIX: none
+
+fun test() {
+    <caret>for (i in 1..10);
+}

idea/testData/inspectionsLocal/controlFlowWithEmptyBody/for/singleHasStatement.kt

@@ -0,0 +1,7 @@
+// PROBLEM: none
+
+fun test() {
+    <caret>for (i in 1..10) foo()
+}
+
+fun foo() {}

idea/testData/inspectionsLocal/controlFlowWithEmptyBody/if/block.kt

@@ -0,0 +1,7 @@
+// PROBLEM: 'if' has empty body
+// FIX: none
+
+fun test(i: Int) {
+    <caret>if (i == 1) {
+    }
+}

idea/testData/inspectionsLocal/controlFlowWithEmptyBody/if/blockHasComment.kt

@@ -0,0 +1,8 @@
+// PROBLEM: 'if' has empty body
+// FIX: none
+
+fun test(i: Int) {
+    <caret>if (i == 1) {
+        // comment
+    }
+}

idea/testData/inspectionsLocal/controlFlowWithEmptyBody/if/blockHasElse.kt

@@ -0,0 +1,10 @@
+// PROBLEM: 'if' has empty body
+// FIX: none
+
+fun test(i: Int) {
+    <caret>if (i == 1) {
+    } else if (i == 2) {
+    } else if (i == 3) {
+    } else {
+    }
+}

idea/testData/inspectionsLocal/controlFlowWithEmptyBody/if/blockHasStatement.kt

@@ -0,0 +1,9 @@
+// PROBLEM: none
+
+fun test(i: Int) {
+    <caret>if (i == 1) {
+        foo()
+    }
+}
+
+fun foo() {}

idea/testData/inspectionsLocal/controlFlowWithEmptyBody/if/elseIf.kt

@@ -0,0 +1,8 @@
+// PROBLEM: 'if' has empty body
+// FIX: none
+
+fun test(i: Int) {
+    if (i == 1) {
+    } else <caret>if (i == 2) {
+    }
+}

idea/testData/inspectionsLocal/controlFlowWithEmptyBody/if/single.kt

@@ -0,0 +1,7 @@
+// PROBLEM: 'if' has empty body 
+// FIX: none
+
+fun test(i: Int) {
+    <caret>if (i == 1) else {
+    }
+}

idea/testData/inspectionsLocal/controlFlowWithEmptyBody/if/singleHasStatement.kt

@@ -0,0 +1,8 @@
+// PROBLEM: none
+
+fun test(i: Int) {
+    <caret>if (i == 1) foo() else {
+    }
+}
+
+fun foo() {}

idea/testData/inspectionsLocal/controlFlowWithEmptyBody/ifElse/block.kt

@@ -0,0 +1,8 @@
+// PROBLEM: 'else' has empty body
+// FIX: none
+
+fun test(i: Int) {
+    if (i == 1) {
+    } <caret>else {
+    }
+}

idea/testData/inspectionsLocal/controlFlowWithEmptyBody/ifElse/blockHasComment.kt

@@ -0,0 +1,9 @@
+// PROBLEM: 'else' has empty body
+// FIX: none
+
+fun test(i: Int) {
+    if (i == 1) {
+    } <caret>else {
+        // comment
+    }
+}

idea/testData/inspectionsLocal/controlFlowWithEmptyBody/ifElse/blockHasStatement.kt

@@ -0,0 +1,10 @@
+// PROBLEM: none
+
+fun test(i: Int) {
+    if (i == 1) {
+    } <caret>else {
+        foo()
+    }
+}
+
+fun foo() {}

idea/testData/inspectionsLocal/controlFlowWithEmptyBody/ifElse/single.kt

@@ -0,0 +1,6 @@
+// PROBLEM: 'else' has empty body
+// FIX: none
+
+fun test(i: Int) {
+    if (i == 1) {}<caret>else {};
+}

idea/testData/inspectionsLocal/controlFlowWithEmptyBody/ifElse/singleHasStatement.kt

@@ -0,0 +1,8 @@
+// PROBLEM: none
+
+fun test(i: Int) {
+    if (i == 1) {
+    } <caret>else foo()
+}
+
+fun foo() {}

idea/testData/inspectionsLocal/controlFlowWithEmptyBody/when/block.kt

@@ -0,0 +1,7 @@
+// PROBLEM: 'when' has empty body
+// FIX: none
+
+fun test(i: Int) {
+    <caret>when (i) {
+    }
+}

idea/testData/inspectionsLocal/controlFlowWithEmptyBody/when/block2.kt

@@ -0,0 +1,7 @@
+// PROBLEM: 'when' has empty body
+// FIX: none
+
+fun test() {
+    <caret>when (val i = 1) {
+    }
+}

idea/testData/inspectionsLocal/controlFlowWithEmptyBody/when/blockHasComment.kt

@@ -0,0 +1,8 @@
+// PROBLEM: 'when' has empty body
+// FIX: none
+
+fun test(i: Int) {
+    <caret>when (i) {
+        // comment
+    }
+}

idea/testData/inspectionsLocal/controlFlowWithEmptyBody/when/blockHasStatement.kt

@@ -0,0 +1,7 @@
+// PROBLEM: none
+
+fun test(i: Int) {
+    <caret>when (i) {
+        else -> {}
+    }
+}

idea/testData/inspectionsLocal/controlFlowWithEmptyBody/while/block.kt

@@ -0,0 +1,7 @@
+// PROBLEM: 'while' has empty body
+// FIX: none
+
+fun test(i: Int) {
+    <caret>while (i == 1) {
+    }
+}

idea/testData/inspectionsLocal/controlFlowWithEmptyBody/while/blockHasComment.kt

@@ -0,0 +1,8 @@
+// PROBLEM: 'while' has empty body
+// FIX: none
+
+fun test(i: Int) {
+    <caret>while (i == 1) {
+        // comment
+    }
+}

idea/testData/inspectionsLocal/controlFlowWithEmptyBody/while/blockHasStatement.kt

@@ -0,0 +1,9 @@
+// PROBLEM: none
+
+fun test(i: Int) {
+    <caret>while (i == 1) {
+        foo()
+    }
+}
+
+fun foo() {}

idea/testData/inspectionsLocal/controlFlowWithEmptyBody/while/single.kt

@@ -0,0 +1,6 @@
+// PROBLEM: 'while' has empty body
+// FIX: none
+
+fun test(i: Int) {
+    <caret>while (i == 1);
+}

idea/testData/inspectionsLocal/controlFlowWithEmptyBody/while/singleHasStatement.kt

@@ -0,0 +1,7 @@
+// PROBLEM: none
+
+fun test(i: Int) {
+    <caret>while (i == 1) foo()
+}
+
+fun foo() {}