Add quick-fix for empty brackets after primary constructor

So #KT-18534 Fixed

compiler/frontend/src/org/jetbrains/kotlin/diagnostics/Errors.java

@@ -273,6 +273,8 @@ public interface Errors {
 
     DiagnosticFactory0<KtElement> MISSING_CONSTRUCTOR_KEYWORD = DiagnosticFactory0.create(ERROR);
 
+    DiagnosticFactory0<PsiElement> MISSING_CONSTRUCTOR_BRACKETS = DiagnosticFactory0.create(ERROR);
+
     DiagnosticFactory0<PsiElement> NON_PRIVATE_CONSTRUCTOR_IN_ENUM = DiagnosticFactory0.create(ERROR);
     DiagnosticFactory0<PsiElement> NON_PRIVATE_CONSTRUCTOR_IN_SEALED = DiagnosticFactory0.create(ERROR);
 

compiler/frontend/src/org/jetbrains/kotlin/diagnostics/rendering/DefaultErrorMessages.java

@@ -591,6 +591,7 @@ public class DefaultErrorMessages {
         MAP.put(ALWAYS_NULL, "The result of the expression is always null");
 
         MAP.put(MISSING_CONSTRUCTOR_KEYWORD, "Use 'constructor' keyword after modifiers of primary constructor");
+        MAP.put(MISSING_CONSTRUCTOR_BRACKETS, "Constructor requires brackets");
 
         MAP.put(NON_PRIVATE_CONSTRUCTOR_IN_ENUM, "Constructor must be private in enum class");
         MAP.put(NON_PRIVATE_CONSTRUCTOR_IN_SEALED, "Constructor must be private in sealed class");

compiler/frontend/src/org/jetbrains/kotlin/resolve/DeclarationsChecker.kt

@@ -449,6 +449,10 @@ class DeclarationsChecker(
             declaration.modifierList?.let { trace.report(MISSING_CONSTRUCTOR_KEYWORD.on(it)) }
         }
 
+        if (declaration.valueParameterList == null) {
+            declaration.getConstructorKeyword()?.let { trace.report(MISSING_CONSTRUCTOR_BRACKETS.on(it)) }
+        }
+
         if (classOrObject !is KtClass) {
             trace.report(CONSTRUCTOR_IN_OBJECT.on(declaration))
         }

compiler/testData/diagnostics/tests/modifiers/primaryConstructorMissingBrackets.kt

@@ -0,0 +1,2 @@
+class A private <!MISSING_CONSTRUCTOR_BRACKETS!>constructor<!><!SYNTAX!><!> {
+}

compiler/testData/diagnostics/tests/modifiers/primaryConstructorMissingBrackets.txt

@@ -0,0 +1,8 @@
+package
+
+public final class A {
+    private constructor A()
+    public open override /*1*/ /*fake_override*/ fun equals(/*0*/ other: kotlin.Any?): kotlin.Boolean
+    public open override /*1*/ /*fake_override*/ fun hashCode(): kotlin.Int
+    public open override /*1*/ /*fake_override*/ fun toString(): kotlin.String
+}

compiler/tests/org/jetbrains/kotlin/checkers/DiagnosticsTestGenerated.java

@@ -12904,6 +12904,12 @@ public class DiagnosticsTestGenerated extends AbstractDiagnosticsTest {
                 doTest(fileName);
             }
 
+            @TestMetadata("primaryConstructorMissingBrackets.kt")
+            public void testPrimaryConstructorMissingBrackets() throws Exception {
+                String fileName = KotlinTestUtils.navigationMetadata("compiler/testData/diagnostics/tests/modifiers/primaryConstructorMissingBrackets.kt");
+                doTest(fileName);
+            }
+
             @TestMetadata("primaryConstructorMissingKeyword.kt")
             public void testPrimaryConstructorMissingKeyword() throws Exception {
                 String fileName = KotlinTestUtils.navigationMetadata("compiler/testData/diagnostics/tests/modifiers/primaryConstructorMissingKeyword.kt");