fix for KT-2711 wrong check on descriptor being integral range

method added to JetStandardLibrary to get all integral range descriptors
#KT-2711 fixed

compiler/backend/src/org/jetbrains/jet/codegen/ExpressionCodegen.java

@@ -74,6 +74,7 @@ public class ExpressionCodegen extends JetVisitor<StackValue, StackValue> implem
 
     private static final String CLASS_NO_PATTERN_MATCHED_EXCEPTION = "jet/NoPatternMatchedException";
     private static final String CLASS_TYPE_CAST_EXCEPTION = "jet/TypeCastException";
+    public static final Set<DeclarationDescriptor> INTEGRAL_RANGES = JetStandardLibrary.getInstance().getIntegralRanges();
 
     private int myLastLineNumber = -1;
 
@@ -3535,13 +3536,7 @@ The "returned" value of try expression with no finally is either the last expres
                 JetType jetType = bindingContext.get(BindingContext.EXPRESSION_TYPE, rangeExpression);
                 assert jetType != null;
                 final DeclarationDescriptor descriptor = jetType.getConstructor().getDeclarationDescriptor();
-                if (isClass(descriptor, "IntRange") ||
-                    isClass(descriptor, "CharRange") ||
-                    isClass(descriptor, "ByteRange") ||
-                    isClass(descriptor, "LongRange") ||
-                    isClass(descriptor, "ShortRange")) {
-                    return true;
-                }
+                return INTEGRAL_RANGES.contains(descriptor);
             }
         }
         return false;

compiler/frontend/src/org/jetbrains/jet/lang/types/lang/JetStandardLibrary.java

@@ -16,6 +16,7 @@
 
 package org.jetbrains.jet.lang.types.lang;
 
+import com.google.common.collect.ImmutableSet;
 import com.intellij.openapi.progress.ProcessCanceledException;
 import com.intellij.openapi.project.Project;
 import com.intellij.openapi.util.io.FileUtil;
@@ -23,6 +24,7 @@ import com.intellij.psi.PsiFileFactory;
 import org.jetbrains.annotations.NotNull;
 import org.jetbrains.annotations.Nullable;
 import org.jetbrains.jet.lang.descriptors.ClassDescriptor;
+import org.jetbrains.jet.lang.descriptors.DeclarationDescriptor;
 import org.jetbrains.jet.lang.descriptors.PropertyDescriptor;
 import org.jetbrains.jet.lang.descriptors.annotations.AnnotationDescriptor;
 import org.jetbrains.jet.lang.psi.JetFile;
@@ -34,11 +36,7 @@ import org.jetbrains.jet.lang.resolve.scopes.JetScope;
 import org.jetbrains.jet.lang.resolve.scopes.RedeclarationHandler;
 import org.jetbrains.jet.lang.resolve.scopes.WritableScope;
 import org.jetbrains.jet.lang.resolve.scopes.WritableScopeImpl;
-import org.jetbrains.jet.lang.types.JetType;
-import org.jetbrains.jet.lang.types.JetTypeImpl;
-import org.jetbrains.jet.lang.types.TypeProjection;
-import org.jetbrains.jet.lang.types.TypeUtils;
-import org.jetbrains.jet.lang.types.Variance;
+import org.jetbrains.jet.lang.types.*;
 import org.jetbrains.jet.plugin.JetFileType;
 
 import java.io.IOException;
@@ -218,6 +216,18 @@ public class JetStandardLibrary {
         jetArrayTypeToPrimitiveJetType.put(arrayType, type);
     }
 
+    public Set<DeclarationDescriptor> getIntegralRanges() {
+        initStdClasses();
+
+        return ImmutableSet.<DeclarationDescriptor>of(
+                getStdClassByName("ByteRange"),
+                getStdClassByName("ShortRange"),
+                getStdClassByName("CharRange"),
+                getStdClassByName("IntRange"),
+                getStdClassByName("LongRange")
+        );
+    }
+
     public Collection<ClassDescriptor> getStandardTypes() {
         initStdClasses();
 

compiler/testData/codegen/regressions/kt2711.kt

@@ -0,0 +1,14 @@
+class IntRange {
+    fun contains(a: Int) = (1..2).contains(a)
+}
+
+class C() {
+    fun rangeTo(i: Int) = IntRange()
+}
+
+
+fun main(args: Array<String>) {
+    if (2 in C()..2) {
+        System.out?.println(2)
+    }
+}

compiler/tests/org/jetbrains/jet/codegen/ClassGenTest.java

@@ -533,4 +533,9 @@ public class ClassGenTest extends CodegenTestCase {
         createEnvironmentWithMockJdkAndIdeaAnnotations(ConfigurationKind.JDK_ONLY);
         blackBoxFile("regressions/kt1535.kt");
     }
+
+    public void testKt2711() {
+        createEnvironmentWithMockJdkAndIdeaAnnotations(ConfigurationKind.JDK_ONLY);
+        blackBoxFile("regressions/kt2711.kt");
+    }
 }