[ann] Improved catch analysis

2026-08-25 10:51:25 +07:00 · 2011-05-03 21:10:11 +02:00
parent 23087cdf9c
commit 475354f2b6
6 changed files with 356 additions and 17 deletions
@@ -0,0 +1,241 @@
+/*
+ * Copyright 2000-2011 JetBrains s.r.o.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+import java.io.*;
+
+class C {
+  static class E extends Exception { }
+  static class RE extends RuntimeException { }
+
+  void f() { }
+  void g() throws E { }
+  void h() throws RE { }
+
+  void m0() {
+    try { throw new FileNotFoundException(); }
+    catch (FileNotFoundException e) { }
+    <warning descr="Unreachable section: exception 'java.io.FileNotFoundException' has already been caught">catch (IOException e) { }</warning>
+  }
+
+  void m1() {
+    try { throw new IOException(); }
+    catch (FileNotFoundException e) { }
+    catch (IOException e) { }
+  }
+
+  void m2() {
+    try { f(); }
+    catch (Exception e) { }
+  }
+
+  void m3() {
+    try { g(); }
+    catch (Exception e) { }
+  }
+
+  void m4() {
+    try { h(); }
+    catch (Exception e) { }
+  }
+
+  void m5() {
+    try { f(); }
+    catch (Throwable t) { }
+  }
+
+  void m6() {
+    try { g(); }
+    catch (Throwable t) { }
+  }
+
+  void m7() {
+    try { h(); }
+    catch (Throwable t) { }
+  }
+
+  void m9() {
+    try { f(); }
+    catch (Error e) { }
+    catch (Throwable t) { }
+  }
+
+  void m10() {
+    try { g(); }
+    catch (Error e) { }
+    catch (Throwable t) { }
+  }
+
+  void m11() {
+    try { h(); }
+    catch (Error e) { }
+    catch (Throwable t) { }
+  }
+
+  void m12() {
+    try { f(); }
+    catch (RuntimeException e) { }
+    catch (Throwable t) { }
+  }
+
+  void m13() {
+    try { g(); }
+    catch (RuntimeException e) { }
+    catch (Throwable t) { }
+  }
+
+  void m14() {
+    try { h(); }
+    catch (RuntimeException e) { }
+    catch (Throwable t) { }
+  }
+
+  void m15() {
+    try { f(); }
+    catch (RuntimeException e) { }
+    <warning descr="Unreachable section: exception 'java.lang.RuntimeException' has already been caught">catch (Exception e) { }</warning>
+  }
+
+  void m16() {
+    try { g(); }
+    catch (RuntimeException e) { }
+    catch (Exception e) { }
+  }
+
+  void m17() {
+    try { h(); }
+    catch (RuntimeException e) { }
+    <warning descr="Unreachable section: exception 'java.lang.RuntimeException' has already been caught">catch (Exception e) { }</warning>
+  }
+
+  void m18() {
+    try { f(); }
+    catch (RuntimeException e) { }
+    catch (<error descr="Exception 'C.E' is never thrown in the corresponding try block">E e</error>) { }
+    <warning descr="Unreachable section: exception 'java.lang.RuntimeException' has already been caught">catch (Exception e) { }</warning>
+  }
+
+  void m19() {
+    try { g(); }
+    catch (RuntimeException e) { }
+    catch (E e) { }
+    <warning descr="Unreachable section: exceptions 'C.E, java.lang.RuntimeException' have already been caught">catch (Exception e) { }</warning>
+  }
+
+  void m20() {
+    try { h(); }
+    catch (RuntimeException e) { }
+    catch (<error descr="Exception 'C.E' is never thrown in the corresponding try block">E e</error>) { }
+    <warning descr="Unreachable section: exception 'java.lang.RuntimeException' has already been caught">catch (Exception e) { }</warning>
+  }
+
+  void m21() {
+    try { f(); }
+    catch (RuntimeException e) { }
+    <warning descr="Unreachable section: exception 'java.lang.RuntimeException' has already been caught">catch (Exception e) { }</warning>
+  }
+
+  void m22() {
+    try { g(); }
+    catch (RuntimeException e) { }
+    catch (Exception e) { }
+  }
+
+  void m23() {
+    try { h(); }
+    catch (RuntimeException e) { }
+    <warning descr="Unreachable section: exception 'java.lang.RuntimeException' has already been caught">catch (Exception e) { }</warning>
+  }
+
+  void m24() {
+    try { f(); }
+    catch (RuntimeException e) { }
+    catch (Error e) { }
+    <warning descr="Unreachable section: exceptions 'java.lang.RuntimeException, java.lang.Error' have already been caught">catch (Throwable t) { }</warning>
+  }
+
+  void m25() {
+    try { g(); }
+    catch (RuntimeException e) { }
+    catch (Error e) { }
+    catch (Throwable t) { }
+  }
+
+  void m26() {
+    try { h(); }
+    catch (RuntimeException e) { }
+    catch (Error e) { }
+    <warning descr="Unreachable section: exceptions 'java.lang.RuntimeException, java.lang.Error' have already been caught">catch (Throwable t) { }</warning>
+  }
+
+  void m27() {
+    try { f(); }
+    catch (RuntimeException e) { }
+    catch (Error e) { }
+    catch (<error descr="Exception 'C.E' is never thrown in the corresponding try block">E e</error>) { }
+    <warning descr="Unreachable section: exceptions 'java.lang.RuntimeException, java.lang.Error' have already been caught">catch (Throwable t) { }</warning>
+  }
+
+  void m28() {
+    try { g(); }
+    catch (RuntimeException e) { }
+    catch (Error e) { }
+    catch (E e) { }
+    <warning descr="Unreachable section: exceptions 'C.E, java.lang.RuntimeException, java.lang.Error' have already been caught">catch (Throwable t) { }</warning>
+  }
+
+  void m29() {
+    try { h(); }
+    catch (RuntimeException e) { }
+    catch (Error e) { }
+    catch (<error descr="Exception 'C.E' is never thrown in the corresponding try block">E e</error>) { }
+    <warning descr="Unreachable section: exceptions 'java.lang.RuntimeException, java.lang.Error' have already been caught">catch (Throwable t) { }</warning>
+  }
+
+  void m30() {
+    try { f(); }
+    catch (RuntimeException e) { }
+    catch (Error e) { }
+    <warning descr="Unreachable section: exceptions 'java.lang.RuntimeException, java.lang.Error' have already been caught">catch (Throwable t) { }</warning>
+  }
+
+  void m31() {
+    try { g(); }
+    catch (RuntimeException e) { }
+    catch (Error e) { }
+    catch (Throwable t) { }
+  }
+
+  void m32() {
+    try { h(); }
+    catch (RuntimeException e) { }
+    catch (Error e) { }
+    <warning descr="Unreachable section: exceptions 'java.lang.RuntimeException, java.lang.Error' have already been caught">catch (Throwable t) { }</warning>
+  }
+
+  void m33() {
+    try { g(); }
+    catch (E e) { }
+  }
+
+  void m34() {
+    try { h(); }
+    catch (<error descr="Exception 'C.E' is never thrown in the corresponding try block">E e</error>) { }
+  }
+
+  void m35() {
+    try { f(); }
+    catch (<error descr="Exception 'C.E' is never thrown in the corresponding try block">E e</error>) { }
+  }
+}