Remove CobolGoBackException.java and CobolStopRunException.dummy (#756)

* change: remove CobolGoBackException.java

* chore: remove CobolStopRun.dummy

Author: yutaro-sakamoto

cobj/codegen.c

@@ -3767,7 +3767,7 @@ static void joutput_stmt(cb_tree x, enum joutput_stmt_type output_type) {
     joutput_indent_level += 2;
     joutput_line(
         "public Optional<CobolControl> run() throws CobolRuntimeException, "
-        "CobolGoBackException, CobolStopRunException {");
+        "CobolStopRunException {");
     joutput_indent_level += 2;
 
     if (cb_flag_trace) {
@@ -4824,8 +4824,6 @@ static void joutput_internal_function(struct cb_program *prog,
   /* PROCEDURE DIVISION */
   joutput_line("/* PROCEDURE DIVISION */");
   joutput_line("try{");
-  joutput_line("  CobolStopRunException.dummy();");
-  joutput_line("  CobolGoBackException.dummy();");
   joutput_indent_level += 2;
 
   // EDIT
@@ -4864,8 +4862,6 @@ static void joutput_internal_function(struct cb_program *prog,
   }
 
   joutput_indent_level -= 2;
-  joutput_line("} catch(CobolGoBackException e) {");
-  joutput_line("  return e.getReturnCode();");
   joutput_line("} catch(CobolStopRunException e) {");
   joutput_line("  CobolStopRunException.stopRun();");
   joutput_line("  System.exit(e.getReturnCode());");
@@ -5849,7 +5845,7 @@ static void joutput_execution_list(struct cb_program *prog) {
   joutput_indent_level += 2;
   joutput_line(
       "public Optional<CobolControl> run() throws CobolRuntimeException, "
-      "CobolGoBackException, CobolStopRunException {");
+      "CobolStopRunException {");
   joutput_indent_level += 2;
   cb_tree l;
   flag_execution_begin = EXECUTION_NORMAL;
@@ -5950,7 +5946,7 @@ static void joutput_execution_list(struct cb_program *prog) {
 
 static void joutput_execution_entry_func() {
   joutput_line("public void execEntry(int start) throws CobolRuntimeException, "
-               "CobolGoBackException, CobolStopRunException {");
+               "CobolStopRunException {");
   joutput_indent_level += 2;
   joutput_line(
       "Optional<CobolControl> nextLabel = Optional.of(contList[start]);");

libcobj/Makefile.am

@@ -39,7 +39,6 @@ SRC_FILES = \
 	./app/src/main/java/jp/osscons/opensourcecobol/libcobj/data/CobolNationalField.java \
 	./app/src/main/java/jp/osscons/opensourcecobol/libcobj/data/CobolNumericEditedField.java \
 	./app/src/main/java/jp/osscons/opensourcecobol/libcobj/exceptions/CobolExceptionId.java \
-	./app/src/main/java/jp/osscons/opensourcecobol/libcobj/exceptions/CobolGoBackException.java \
 	./app/src/main/java/jp/osscons/opensourcecobol/libcobj/exceptions/CobolStopRunException.java \
 	./app/src/main/java/jp/osscons/opensourcecobol/libcobj/exceptions/CobolExceptionInfo.java \
 	./app/src/main/java/jp/osscons/opensourcecobol/libcobj/exceptions/CobolExceptionTabCode.java \

libcobj/Makefile.in

@@ -316,7 +316,6 @@ SRC_FILES = \
 	./app/src/main/java/jp/osscons/opensourcecobol/libcobj/data/CobolNationalField.java \
 	./app/src/main/java/jp/osscons/opensourcecobol/libcobj/data/CobolNumericEditedField.java \
 	./app/src/main/java/jp/osscons/opensourcecobol/libcobj/exceptions/CobolExceptionId.java \
-	./app/src/main/java/jp/osscons/opensourcecobol/libcobj/exceptions/CobolGoBackException.java \
 	./app/src/main/java/jp/osscons/opensourcecobol/libcobj/exceptions/CobolStopRunException.java \
 	./app/src/main/java/jp/osscons/opensourcecobol/libcobj/exceptions/CobolExceptionInfo.java \
 	./app/src/main/java/jp/osscons/opensourcecobol/libcobj/exceptions/CobolExceptionTabCode.java \

libcobj/app/src/main/java/jp/osscons/opensourcecobol/libcobj/common/CobolControl.java

@@ -19,7 +19,6 @@
 package jp.osscons.opensourcecobol.libcobj.common;
 
 import java.util.Optional;
-import jp.osscons.opensourcecobol.libcobj.exceptions.CobolGoBackException;
 import jp.osscons.opensourcecobol.libcobj.exceptions.CobolRuntimeException;
 import jp.osscons.opensourcecobol.libcobj.exceptions.CobolStopRunException;
 
@@ -38,11 +37,10 @@ public enum LabelType {
      *
      * @return TODO: 準備中
      * @throws CobolRuntimeException TODO: 準備中
-     * @throws CobolGoBackException TODO: 準備中
      * @throws CobolStopRunException TODO: 準備中
      */
     public abstract Optional<CobolControl> run()
-            throws CobolRuntimeException, CobolGoBackException, CobolStopRunException;
+            throws CobolRuntimeException, CobolStopRunException;
 
     /** TODO: 準備中 */
     public int contId = -1;
@@ -76,7 +74,7 @@ public static CobolControl pure() {
         return new CobolControl() {
             @Override
             public Optional<CobolControl> run()
-                    throws CobolRuntimeException, CobolGoBackException, CobolStopRunException {
+                    throws CobolRuntimeException, CobolStopRunException {
                 return Optional.empty();
             }
         };
@@ -92,7 +90,7 @@ public static CobolControl goTo(CobolControl cont) {
         return new CobolControl() {
             @Override
             public Optional<CobolControl> run()
-                    throws CobolRuntimeException, CobolGoBackException, CobolStopRunException {
+                    throws CobolRuntimeException, CobolStopRunException {
                 return cont.run();
             }
         };
@@ -110,7 +108,7 @@ public static CobolControl performThrough(CobolControl[] contList, int begin, in
         return new CobolControl() {
             @Override
             public Optional<CobolControl> run()
-                    throws CobolRuntimeException, CobolGoBackException, CobolStopRunException {
+                    throws CobolRuntimeException, CobolStopRunException {
                 Optional<CobolControl> nextCont = Optional.of(contList[begin]);
                 LabelType endType = contList[end].type;
                 int executedProgramId;

libcobj/app/src/main/java/jp/osscons/opensourcecobol/libcobj/exceptions/CobolGoBackException.java

@@ -74,18 +74,6 @@ public static void throwException(CobolDataStorage storage) throws CobolStopRunE
         throw new CobolStopRunException(storage);
     }
 
-    /**
-     * javaコンパイラは、try節の中にthrowが発生しないと判断するとコンパイルエラーになる。 Javaコード生成時にこの問題を回避するため、このメソッドが挿入される。 throws
-     * CobolRunExceptionが指定されているが、このメソッドは決して例外をスローせず、その他の処理も実行しない。
-     *
-     * @throws CobolStopRunException TODO: 準備中
-     */
-    public static void dummy() throws CobolStopRunException {
-        if (false) {
-            throw new CobolStopRunException(0);
-        }
-    }
-
     /**
      * デフォルトの終了処理を実行してから、CobolStopRunExceptionをスローする。
      * デフォルトの終了処理では、COBOLプログラムによってオープンされたファイルのクローズが行われる。