1 /*

     2  * Copyright (c) 2008, 2011, Oracle and/or its affiliates. All rights reserved.

     3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

     4  *

     5  * This code is free software; you can redistribute it and/or modify it

     6  * under the terms of the GNU General Public License version 2 only, as

     7  * published by the Free Software Foundation.  Oracle designates this

     8  * particular file as subject to the "Classpath" exception as provided

     9  * by Oracle in the LICENSE file that accompanied this code.

    10  *

    11  * This code is distributed in the hope that it will be useful, but WITHOUT

    12  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or

    13  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License

    14  * version 2 for more details (a copy is included in the LICENSE file that

    15  * accompanied this code).

    16  *

    17  * You should have received a copy of the GNU General Public License version

    18  * 2 along with this work; if not, write to the Free Software Foundation,

    19  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.

    20  *

    21  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA

    22  * or visit www.oracle.com if you need additional information or have any

    23  * questions.

    24  */

    25 

    26 package sun.dyn;

    27 

    28 import java.dyn.*;

    29 import java.lang.reflect.*;

    30 import sun.dyn.util.*;

    31 import static sun.dyn.MethodTypeImpl.invokers;

    32 

    33 /**

    34  * Adapters which mediate between incoming calls which are generic

    35  * and outgoing calls which are not.  Any call can be represented generically

    36  * boxing up its arguments, and (on return) unboxing the return value.

    37  * <p>

    38  * A call is "generic" (in MethodHandle terms) if its MethodType features

    39  * only Object arguments.  A non-generic call therefore features

    40  * primitives and/or reference types other than Object.

    41  * An adapter has types for its incoming and outgoing calls.

    42  * The incoming call type is simply determined by the adapter's type

    43  * (the MethodType it presents to callers).  The outgoing call type

    44  * is determined by the adapter's target (a MethodHandle that the adapter

    45  * either binds internally or else takes as a leading argument).

    46  * (To stretch the term, adapter-like method handles may have multiple

    47  * targets or be polymorphic across multiple call types.)

    48  * @author jrose

    49  */

    50 class FromGeneric {

    51     // type for the outgoing call (may have primitives, etc.)

    52     private final MethodType targetType;

    53     // type of the outgoing call internal to the adapter

    54     private final MethodType internalType;

    55     // prototype adapter (clone and customize for each new target!)

    56     private final Adapter adapter;

    57     // entry point for adapter (Adapter mh, a...) => ...

    58     private final MethodHandle entryPoint;

    59     // unboxing invoker of type (MH, Object**N) => raw return value

    60     // it makes up the difference of internalType => targetType

    61     private final MethodHandle unboxingInvoker;

    62     // conversion which boxes a the target's raw return value

    63     private final MethodHandle returnConversion;

    64 

    65     /** Compute and cache information common to all unboxing adapters

    66      *  that can call out to targets of the erasure-family of the given erased type.

    67      */

    68     private FromGeneric(MethodType targetType) {

    69         this.targetType = targetType;

    70         MethodType internalType0;

    71         // the target invoker will generally need casts on reference arguments

    72         Adapter ad = findAdapter(internalType0 = targetType.erase());

    73         if (ad != null) {

    74             // Immediate hit to exactly the adapter we want,

    75             // with no monkeying around with primitive types.

    76             this.internalType = internalType0;

    77             this.adapter = ad;

    78             this.entryPoint = ad.prototypeEntryPoint();

    79             this.returnConversion = computeReturnConversion(targetType, internalType0);

    80             this.unboxingInvoker = computeUnboxingInvoker(targetType, internalType0);

    81             return;

    82         }

    83 

    84         // outgoing primitive arguments will be wrapped; unwrap them

    85         MethodType primsAsObj = MethodTypeImpl.of(targetType).primArgsAsBoxes();

    86         MethodType objArgsRawRet = MethodTypeImpl.of(primsAsObj).primsAsInts();

    87         if (objArgsRawRet != targetType)

    88             ad = findAdapter(internalType0 = objArgsRawRet);

    89         if (ad == null) {

    90             ad = buildAdapterFromBytecodes(internalType0 = targetType);

    91         }

    92         this.internalType = internalType0;

    93         this.adapter = ad;

    94         MethodType tepType = targetType.insertParameterTypes(0, adapter.getClass());

    95         this.entryPoint = ad.prototypeEntryPoint();

    96         this.returnConversion = computeReturnConversion(targetType, internalType0);

    97         this.unboxingInvoker = computeUnboxingInvoker(targetType, internalType0);

    98     }

    99 

   100     /**

   101      * The typed target will be called according to targetType.

   102      * The adapter code will in fact see the raw result from internalType,

   103      * and must box it into an object.  Produce a converter for this.

   104      */

   105     private static MethodHandle computeReturnConversion(

   106             MethodType targetType, MethodType internalType) {

   107         Class<?> tret = targetType.returnType();

   108         Class<?> iret = internalType.returnType();

   109         Wrapper wrap = Wrapper.forBasicType(tret);

   110         if (!iret.isPrimitive()) {

   111             assert(iret == Object.class);

   112             return ValueConversions.identity();

   113         } else if (wrap.primitiveType() == iret) {

   114             return ValueConversions.box(wrap, false);

   115         } else {

   116             assert(tret == double.class ? iret == long.class : iret == int.class);

   117             return ValueConversions.boxRaw(wrap, false);

   118         }

   119     }

   120 

   121     /**

   122      * The typed target will need an exact invocation point; provide it here.

   123      * The adapter will possibly need to make a slightly different call,

   124      * so adapt the invoker.  This way, the logic for making up the

   125      * difference between what the adapter can call and what the target

   126      * needs can be cached once per type.

   127      */

   128     private static MethodHandle computeUnboxingInvoker(

   129             MethodType targetType, MethodType internalType) {

   130         // All the adapters we have here have reference-untyped internal calls.

   131         assert(internalType == internalType.erase());

   132         MethodHandle invoker = invokers(targetType).exactInvoker();

   133         // cast all narrow reference types, unbox all primitive arguments:

   134         MethodType fixArgsType = internalType.changeReturnType(targetType.returnType());

   135         MethodHandle fixArgs = AdapterMethodHandle.convertArguments(Access.TOKEN,

   136                                  invoker, Invokers.invokerType(fixArgsType),

   137                                  invoker.type(), null);

   138         if (fixArgs == null)

   139             throw new InternalError("bad fixArgs");

   140         // reinterpret the calling sequence as raw:

   141         MethodHandle retyper = AdapterMethodHandle.makeRetypeRaw(Access.TOKEN,

   142                                         Invokers.invokerType(internalType), fixArgs);

   143         if (retyper == null)

   144             throw new InternalError("bad retyper");

   145         return retyper;

   146     }

   147 

   148     Adapter makeInstance(MethodHandle typedTarget) {

   149         MethodType type = typedTarget.type();

   150         if (type == targetType) {

   151             return adapter.makeInstance(entryPoint, unboxingInvoker, returnConversion, typedTarget);

   152         }

   153         // my erased-type is not exactly the same as the desired type

   154         assert(type.erase() == targetType);  // else we are busted

   155         MethodHandle invoker = computeUnboxingInvoker(type, internalType);

   156         return adapter.makeInstance(entryPoint, invoker, returnConversion, typedTarget);

   157     }

   158 

   159     /** Build an adapter of the given generic type, which invokes typedTarget

   160      *  on the incoming arguments, after unboxing as necessary.

   161      *  The return value is boxed if necessary.

   162      * @param genericType  the required type of the result

   163      * @param typedTarget the target

   164      * @return an adapter method handle

   165      */

   166     public static MethodHandle make(MethodHandle typedTarget) {

   167         MethodType type = typedTarget.type();

   168         if (type == type.generic())  return typedTarget;

   169         return FromGeneric.of(type).makeInstance(typedTarget);

   170     }

   171 

   172     /** Return the adapter information for this type's erasure. */

   173     static FromGeneric of(MethodType type) {

   174         MethodTypeImpl form = MethodTypeImpl.of(type);

   175         FromGeneric fromGen = form.fromGeneric;

   176         if (fromGen == null)

   177             form.fromGeneric = fromGen = new FromGeneric(form.erasedType());

   178         return fromGen;

   179     }

   180 

   181     public String toString() {

   182         return "FromGeneric"+targetType;

   183     }

   184 

   185     /* Create an adapter that handles spreading calls for the given type. */

   186     static Adapter findAdapter(MethodType internalType) {

   187         MethodType entryType = internalType.generic();

   188         MethodTypeImpl form = MethodTypeImpl.of(internalType);

   189         Class<?> rtype = internalType.returnType();

   190         int argc = form.parameterCount();

   191         int lac = form.longPrimitiveParameterCount();

   192         int iac = form.primitiveParameterCount() - lac;

   193         String intsAndLongs = (iac > 0 ? "I"+iac : "")+(lac > 0 ? "J"+lac : "");

   194         String rawReturn = String.valueOf(Wrapper.forPrimitiveType(rtype).basicTypeChar());

   195         String cname0 = rawReturn + argc;

   196         String cname1 = "A"       + argc;

   197         String[] cnames = { cname0+intsAndLongs, cname0, cname1+intsAndLongs, cname1 };

   198         String iname = "invoke_"+cname0+intsAndLongs;

   199         // e.g., D5I2, D5, L5I2, L5; invoke_D5

   200         for (String cname : cnames) {

   201             Class<? extends Adapter> acls = Adapter.findSubClass(cname);

   202             if (acls == null)  continue;

   203             // see if it has the required invoke method

   204             MethodHandle entryPoint = null;

   205             try {

   206                 entryPoint = MethodHandleImpl.IMPL_LOOKUP.findSpecial(acls, iname, entryType, acls);

   207             } catch (ReflectiveOperationException ex) {

   208             }

   209             if (entryPoint == null)  continue;

   210             Constructor<? extends Adapter> ctor = null;

   211             try {

   212                 ctor = acls.getDeclaredConstructor(MethodHandle.class);

   213             } catch (NoSuchMethodException ex) {

   214             } catch (SecurityException ex) {

   215             }

   216             if (ctor == null)  continue;

   217             try {

   218                 // Produce an instance configured as a prototype.

   219                 return ctor.newInstance(entryPoint);

   220             } catch (IllegalArgumentException ex) {

   221             } catch (InvocationTargetException wex) {

   222                 Throwable ex = wex.getTargetException();

   223                 if (ex instanceof Error)  throw (Error)ex;

   224                 if (ex instanceof RuntimeException)  throw (RuntimeException)ex;

   225             } catch (InstantiationException ex) {

   226             } catch (IllegalAccessException ex) {

   227             }

   228         }

   229         return null;

   230     }

   231 

   232     static Adapter buildAdapterFromBytecodes(MethodType internalType) {

   233         throw new UnsupportedOperationException("NYI");

   234     }

   235 

   236     /**

   237      * This adapter takes some untyped arguments, and returns an untyped result.

   238      * Internally, it applies the invoker to the target, which causes the

   239      * objects to be unboxed; the result is a raw type in L/I/J/F/D.

   240      * This result is passed to convert, which is responsible for

   241      * converting the raw result into a boxed object.

   242      * The invoker is kept separate from the target because it can be

   243      * generated once per type erasure family, and reused across adapters.

   244      */

   245     static abstract class Adapter extends BoundMethodHandle {

   246         /*

   247          * class X<<R,int N>> extends Adapter {

   248          *   (MH, Object**N)=>raw(R) invoker;

   249          *   (any**N)=>R target;

   250          *   raw(R)=>Object convert;

   251          *   Object invoke(Object**N a) = convert(invoker(target, a...))

   252          * }

   253          */

   254         protected final MethodHandle invoker;  // (MH, Object**N) => raw(R)

   255         protected final MethodHandle convert;  // raw(R) => Object

   256         protected final MethodHandle target;   // (any**N) => R

   257 

   258         @Override

   259         public String toString() {

   260             return MethodHandleImpl.addTypeString(target, this);

   261         }

   262 

   263         protected boolean isPrototype() { return target == null; }

   264         protected Adapter(MethodHandle entryPoint) {

   265             this(entryPoint, null, entryPoint, null);

   266             assert(isPrototype());

   267         }

   268         protected MethodHandle prototypeEntryPoint() {

   269             if (!isPrototype())  throw new InternalError();

   270             return convert;

   271         }

   272 

   273         protected Adapter(MethodHandle entryPoint,

   274                           MethodHandle invoker, MethodHandle convert, MethodHandle target) {

   275             super(Access.TOKEN, entryPoint);

   276             this.invoker = invoker;

   277             this.convert = convert;

   278             this.target  = target;

   279         }

   280 

   281         /** Make a copy of self, with new fields. */

   282         protected abstract Adapter makeInstance(MethodHandle entryPoint,

   283                 MethodHandle invoker, MethodHandle convert, MethodHandle target);

   284         // { return new ThisType(entryPoint, convert, target); }

   285 

   286         /// Conversions on the value returned from the target.

   287         protected Object convert_L(Object result) throws Throwable { return convert.invokeExact(result); }

   288         protected Object convert_I(int    result) throws Throwable { return convert.invokeExact(result); }

   289         protected Object convert_J(long   result) throws Throwable { return convert.invokeExact(result); }

   290         protected Object convert_F(float  result) throws Throwable { return convert.invokeExact(result); }

   291         protected Object convert_D(double result) throws Throwable { return convert.invokeExact(result); }

   292 

   293         static private final String CLASS_PREFIX; // "sun.dyn.FromGeneric$"

   294         static {

   295             String aname = Adapter.class.getName();

   296             String sname = Adapter.class.getSimpleName();

   297             if (!aname.endsWith(sname))  throw new InternalError();

   298             CLASS_PREFIX = aname.substring(0, aname.length() - sname.length());

   299         }

   300         /** Find a sibing class of Adapter. */

   301         static Class<? extends Adapter> findSubClass(String name) {

   302             String cname = Adapter.CLASS_PREFIX + name;

   303             try {

   304                 return Class.forName(cname).asSubclass(Adapter.class);

   305             } catch (ClassNotFoundException ex) {

   306                 return null;

   307             } catch (ClassCastException ex) {

   308                 return null;

   309             }

   310         }

   311     }

   312 

   313     /* generated classes follow this pattern:

   314     static class xA2 extends Adapter {

   315         protected xA2(MethodHandle entryPoint) { super(entryPoint); }  // to build prototype

   316         protected xA2(MethodHandle e, MethodHandle i, MethodHandle c, MethodHandle t)

   317                         { super(e, i, c, t); }

   318         protected xA2 makeInstance(MethodHandle e, MethodHandle i, MethodHandle c, MethodHandle t)

   319                         { return new xA2(e, i, c, t); }

   320         protected Object invoke_L2(Object a0, Object a1) throws Throwable { return convert_L((Object)invoker.invokeExact(target, a0, a1)); }

   321         protected Object invoke_I2(Object a0, Object a1) throws Throwable { return convert_I((int)   invoker.invokeExact(target, a0, a1)); }

   322         protected Object invoke_J2(Object a0, Object a1) throws Throwable { return convert_J((long)  invoker.invokeExact(target, a0, a1)); }

   323         protected Object invoke_F2(Object a0, Object a1) throws Throwable { return convert_F((float) invoker.invokeExact(target, a0, a1)); }

   324         protected Object invoke_D2(Object a0, Object a1) throws Throwable { return convert_D((double)invoker.invokeExact(target, a0, a1)); }

   325     }

   326     // */

   327 

   328 /*

   329 : SHELL; n=FromGeneric; cp -p $n.java $n.java-; sed < $n.java- > $n.java+ -e '/{{*{{/,/}}*}}/w /tmp/genclasses.java' -e '/}}*}}/q'; (cd /tmp; javac -d . genclasses.java; java -cp . genclasses) >> $n.java+; echo '}' >> $n.java+; mv $n.java+ $n.java; mv $n.java- $n.java~

   330 //{{{

   331 import java.util.*;

   332 class genclasses {

   333     static String[] TYPES = { "Object",    "int   ",    "long  ",    "float ",    "double" };

   334     static String[] WRAPS = { "         ", "(Integer)", "(Long)   ", "(Float)  ", "(Double) " };

   335     static String[] TCHARS = { "L",     "I",      "J",      "F",      "D",     "A" };

   336     static String[][] TEMPLATES = { {

   337         "@for@ arity=0..10  rcat<=4 nrefs<=99 nints=0   nlongs=0",

   338         "    //@each-cat@",

   339         "    static class @cat@ extends Adapter {",

   340         "        protected @cat@(MethodHandle entryPoint) { super(entryPoint); }  // to build prototype",

   341         "        protected @cat@(MethodHandle e, MethodHandle i, MethodHandle c, MethodHandle t)",

   342         "                        { super(e, i, c, t); }",

   343         "        protected @cat@ makeInstance(MethodHandle e, MethodHandle i, MethodHandle c, MethodHandle t)",

   344         "                        { return new @cat@(e, i, c, t); }",

   345         "        //@each-R@",

   346         "        protected Object invoke_@catN@(@Tvav@) throws Throwable { return convert_@Rc@((@R@)@W@invoker.invokeExact(target@av@)); }",

   347         "        //@end-R@",

   348         "    }",

   349     } };

   350     static final String NEWLINE_INDENT = "\n                ";

   351     enum VAR {

   352         cat, catN, R, Rc, W, av, Tvav, Ovav;

   353         public final String pattern = "@"+toString().replace('_','.')+"@";

   354         public String binding;

   355         static void makeBindings(boolean topLevel, int rcat, int nrefs, int nints, int nlongs) {

   356             int nargs = nrefs + nints + nlongs;

   357             if (topLevel)

   358                 VAR.cat.binding = catstr(ALL_RETURN_TYPES ? TYPES.length : rcat, nrefs, nints, nlongs);

   359             VAR.catN.binding = catstr(rcat, nrefs, nints, nlongs);

   360             VAR.R.binding = TYPES[rcat];

   361             VAR.Rc.binding = TCHARS[rcat];

   362             VAR.W.binding = WRAPS[rcat];

   363             String[] Tv = new String[nargs];

   364             String[] av = new String[nargs];

   365             String[] Tvav = new String[nargs];

   366             String[] Ovav = new String[nargs];

   367             for (int i = 0; i < nargs; i++) {

   368                 int tcat = (i < nrefs) ? 0 : (i < nrefs + nints) ? 1 : 2;

   369                 Tv[i] = TYPES[tcat];

   370                 av[i] = arg(i);

   371                 Tvav[i] = param(Tv[i], av[i]);

   372                 Ovav[i] = param("Object", av[i]);

   373             }

   374             VAR.av.binding = comma(", ", av);

   375             VAR.Tvav.binding = comma(Tvav);

   376             VAR.Ovav.binding = comma(Ovav);

   377         }

   378         static String arg(int i) { return "a"+i; }

   379         static String param(String t, String a) { return t+" "+a; }

   380         static String comma(String[] v) { return comma("", v); }

   381         static String comma(String sep, String[] v) {

   382             if (v.length == 0)  return "";

   383             String res = sep+v[0];

   384             for (int i = 1; i < v.length; i++)  res += ", "+v[i];

   385             return res;

   386         }

   387         static String transform(String string) {

   388             for (VAR var : values())

   389                 string = string.replaceAll(var.pattern, var.binding);

   390             return string;

   391         }

   392     }

   393     static String[] stringsIn(String[] strings, int beg, int end) {

   394         return Arrays.copyOfRange(strings, beg, Math.min(end, strings.length));

   395     }

   396     static String[] stringsBefore(String[] strings, int pos) {

   397         return stringsIn(strings, 0, pos);

   398     }

   399     static String[] stringsAfter(String[] strings, int pos) {

   400         return stringsIn(strings, pos, strings.length);

   401     }

   402     static int indexAfter(String[] strings, int pos, String tag) {

   403         return Math.min(indexBefore(strings, pos, tag) + 1, strings.length);

   404     }

   405     static int indexBefore(String[] strings, int pos, String tag) {

   406         for (int i = pos, end = strings.length; ; i++) {

   407             if (i == end || strings[i].endsWith(tag))  return i;

   408         }

   409     }

   410     static int MIN_ARITY, MAX_ARITY, MAX_RCAT, MAX_REFS, MAX_INTS, MAX_LONGS;

   411     static boolean ALL_ARG_TYPES, ALL_RETURN_TYPES;

   412     static HashSet<String> done = new HashSet<String>();

   413     public static void main(String... av) {

   414         for (String[] template : TEMPLATES) {

   415             int forLinesLimit = indexBefore(template, 0, "@each-cat@");

   416             String[] forLines = stringsBefore(template, forLinesLimit);

   417             template = stringsAfter(template, forLinesLimit);

   418             for (String forLine : forLines)

   419                 expandTemplate(forLine, template);

   420         }

   421     }

   422     static void expandTemplate(String forLine, String[] template) {

   423         String[] params = forLine.split("[^0-9]+");

   424         if (params[0].length() == 0)  params = stringsAfter(params, 1);

   425         System.out.println("//params="+Arrays.asList(params));

   426         int pcur = 0;

   427         MIN_ARITY = Integer.valueOf(params[pcur++]);

   428         MAX_ARITY = Integer.valueOf(params[pcur++]);

   429         MAX_RCAT  = Integer.valueOf(params[pcur++]);

   430         MAX_REFS  = Integer.valueOf(params[pcur++]);

   431         MAX_INTS  = Integer.valueOf(params[pcur++]);

   432         MAX_LONGS = Integer.valueOf(params[pcur++]);

   433         if (pcur != params.length)  throw new RuntimeException("bad extra param: "+forLine);

   434         if (MAX_RCAT >= TYPES.length)  MAX_RCAT = TYPES.length - 1;

   435         ALL_ARG_TYPES = (indexBefore(template, 0, "@each-Tv@") < template.length);

   436         ALL_RETURN_TYPES = (indexBefore(template, 0, "@each-R@") < template.length);

   437         for (int nargs = MIN_ARITY; nargs <= MAX_ARITY; nargs++) {

   438             for (int rcat = 0; rcat <= MAX_RCAT; rcat++) {

   439                 expandTemplate(template, true, rcat, nargs, 0, 0);

   440                 if (ALL_ARG_TYPES)  break;

   441                 expandTemplateForPrims(template, true, rcat, nargs, 1, 1);

   442                 if (ALL_RETURN_TYPES)  break;

   443             }

   444         }

   445     }

   446     static String catstr(int rcat, int nrefs, int nints, int nlongs) {

   447         int nargs = nrefs + nints + nlongs;

   448         String cat = TCHARS[rcat] + nargs;

   449         if (!ALL_ARG_TYPES)  cat += (nints==0?"":"I"+nints)+(nlongs==0?"":"J"+nlongs);

   450         return cat;

   451     }

   452     static void expandTemplateForPrims(String[] template, boolean topLevel, int rcat, int nargs, int minints, int minlongs) {

   453         for (int isLong = 0; isLong <= 1; isLong++) {

   454             for (int nprims = 1; nprims <= nargs; nprims++) {

   455                 int nrefs = nargs - nprims;

   456                 int nints = ((1-isLong) * nprims);

   457                 int nlongs = (isLong * nprims);

   458                 expandTemplate(template, topLevel, rcat, nrefs, nints, nlongs);

   459             }

   460         }

   461     }

   462     static void expandTemplate(String[] template, boolean topLevel,

   463                                int rcat, int nrefs, int nints, int nlongs) {

   464         int nargs = nrefs + nints + nlongs;

   465         if (nrefs > MAX_REFS || nints > MAX_INTS || nlongs > MAX_LONGS)  return;

   466         VAR.makeBindings(topLevel, rcat, nrefs, nints, nlongs);

   467         if (topLevel && !done.add(VAR.cat.binding)) {

   468             System.out.println("    //repeat "+VAR.cat.binding);

   469             return;

   470         }

   471         for (int i = 0; i < template.length; i++) {

   472             String line = template[i];

   473             if (line.endsWith("@each-cat@")) {

   474                 // ignore

   475             } else if (line.endsWith("@each-R@")) {

   476                 int blockEnd = indexAfter(template, i, "@end-R@");

   477                 String[] block = stringsIn(template, i+1, blockEnd-1);

   478                 for (int rcat1 = rcat; rcat1 <= MAX_RCAT; rcat1++)

   479                     expandTemplate(block, false, rcat1, nrefs, nints, nlongs);

   480                 VAR.makeBindings(topLevel, rcat, nrefs, nints, nlongs);

   481                 i = blockEnd-1; continue;

   482             } else if (line.endsWith("@each-Tv@")) {

   483                 int blockEnd = indexAfter(template, i, "@end-Tv@");

   484                 String[] block = stringsIn(template, i+1, blockEnd-1);

   485                 expandTemplate(block, false, rcat, nrefs, nints, nlongs);

   486                 expandTemplateForPrims(block, false, rcat, nargs, nints+1, nlongs+1);

   487                 VAR.makeBindings(topLevel, rcat, nrefs, nints, nlongs);

   488                 i = blockEnd-1; continue;

   489             } else {

   490                 System.out.println(VAR.transform(line));

   491             }

   492         }

   493     }

   494 }

   495 //}}} */

   496 //params=[0, 10, 4, 99, 0, 0]

   497     static class A0 extends Adapter {

   498         protected A0(MethodHandle entryPoint) { super(entryPoint); }  // to build prototype

   499         protected A0(MethodHandle e, MethodHandle i, MethodHandle c, MethodHandle t)

   500                         { super(e, i, c, t); }

   501         protected A0 makeInstance(MethodHandle e, MethodHandle i, MethodHandle c, MethodHandle t)

   502                         { return new A0(e, i, c, t); }

   503         protected Object invoke_L0() throws Throwable { return convert_L((Object)invoker.invokeExact(target)); }

   504         protected Object invoke_I0() throws Throwable { return convert_I((int)   invoker.invokeExact(target)); }

   505         protected Object invoke_J0() throws Throwable { return convert_J((long)  invoker.invokeExact(target)); }

   506         protected Object invoke_F0() throws Throwable { return convert_F((float) invoker.invokeExact(target)); }

   507         protected Object invoke_D0() throws Throwable { return convert_D((double)invoker.invokeExact(target)); }

   508     }

   509     static class A1 extends Adapter {

   510         protected A1(MethodHandle entryPoint) { super(entryPoint); }  // to build prototype

   511         protected A1(MethodHandle e, MethodHandle i, MethodHandle c, MethodHandle t)

   512                         { super(e, i, c, t); }

   513         protected A1 makeInstance(MethodHandle e, MethodHandle i, MethodHandle c, MethodHandle t)

   514                         { return new A1(e, i, c, t); }

   515         protected Object invoke_L1(Object a0) throws Throwable { return convert_L((Object)invoker.invokeExact(target, a0)); }

   516         protected Object invoke_I1(Object a0) throws Throwable { return convert_I((int)   invoker.invokeExact(target, a0)); }

   517         protected Object invoke_J1(Object a0) throws Throwable { return convert_J((long)  invoker.invokeExact(target, a0)); }

   518         protected Object invoke_F1(Object a0) throws Throwable { return convert_F((float) invoker.invokeExact(target, a0)); }

   519         protected Object invoke_D1(Object a0) throws Throwable { return convert_D((double)invoker.invokeExact(target, a0)); }

   520     }

   521     static class A2 extends Adapter {

   522         protected A2(MethodHandle entryPoint) { super(entryPoint); }  // to build prototype

   523         protected A2(MethodHandle e, MethodHandle i, MethodHandle c, MethodHandle t)

   524                         { super(e, i, c, t); }

   525         protected A2 makeInstance(MethodHandle e, MethodHandle i, MethodHandle c, MethodHandle t)

   526                         { return new A2(e, i, c, t); }

   527         protected Object invoke_L2(Object a0, Object a1) throws Throwable { return convert_L((Object)invoker.invokeExact(target, a0, a1)); }

   528         protected Object invoke_I2(Object a0, Object a1) throws Throwable { return convert_I((int)   invoker.invokeExact(target, a0, a1)); }

   529         protected Object invoke_J2(Object a0, Object a1) throws Throwable { return convert_J((long)  invoker.invokeExact(target, a0, a1)); }

   530         protected Object invoke_F2(Object a0, Object a1) throws Throwable { return convert_F((float) invoker.invokeExact(target, a0, a1)); }

   531         protected Object invoke_D2(Object a0, Object a1) throws Throwable { return convert_D((double)invoker.invokeExact(target, a0, a1)); }

   532     }

   533     static class A3 extends Adapter {

   534         protected A3(MethodHandle entryPoint) { super(entryPoint); }  // to build prototype

   535         protected A3(MethodHandle e, MethodHandle i, MethodHandle c, MethodHandle t)

   536                         { super(e, i, c, t); }

   537         protected A3 makeInstance(MethodHandle e, MethodHandle i, MethodHandle c, MethodHandle t)

   538                         { return new A3(e, i, c, t); }

   539         protected Object invoke_L3(Object a0, Object a1, Object a2) throws Throwable { return convert_L((Object)invoker.invokeExact(target, a0, a1, a2)); }

   540         protected Object invoke_I3(Object a0, Object a1, Object a2) throws Throwable { return convert_I((int)   invoker.invokeExact(target, a0, a1, a2)); }

   541         protected Object invoke_J3(Object a0, Object a1, Object a2) throws Throwable { return convert_J((long)  invoker.invokeExact(target, a0, a1, a2)); }

   542         protected Object invoke_F3(Object a0, Object a1, Object a2) throws Throwable { return convert_F((float) invoker.invokeExact(target, a0, a1, a2)); }

   543         protected Object invoke_D3(Object a0, Object a1, Object a2) throws Throwable { return convert_D((double)invoker.invokeExact(target, a0, a1, a2)); }

   544     }

   545     static class A4 extends Adapter {

   546         protected A4(MethodHandle entryPoint) { super(entryPoint); }  // to build prototype

   547         protected A4(MethodHandle e, MethodHandle i, MethodHandle c, MethodHandle t)

   548                         { super(e, i, c, t); }

   549         protected A4 makeInstance(MethodHandle e, MethodHandle i, MethodHandle c, MethodHandle t)

   550                         { return new A4(e, i, c, t); }

   551         protected Object invoke_L4(Object a0, Object a1, Object a2, Object a3) throws Throwable { return convert_L((Object)invoker.invokeExact(target, a0, a1, a2, a3)); }

   552         protected Object invoke_I4(Object a0, Object a1, Object a2, Object a3) throws Throwable { return convert_I((int)   invoker.invokeExact(target, a0, a1, a2, a3)); }

   553         protected Object invoke_J4(Object a0, Object a1, Object a2, Object a3) throws Throwable { return convert_J((long)  invoker.invokeExact(target, a0, a1, a2, a3)); }

   554         protected Object invoke_F4(Object a0, Object a1, Object a2, Object a3) throws Throwable { return convert_F((float) invoker.invokeExact(target, a0, a1, a2, a3)); }

   555         protected Object invoke_D4(Object a0, Object a1, Object a2, Object a3) throws Throwable { return convert_D((double)invoker.invokeExact(target, a0, a1, a2, a3)); }

   556     }

   557     static class A5 extends Adapter {

   558         protected A5(MethodHandle entryPoint) { super(entryPoint); }  // to build prototype

   559         protected A5(MethodHandle e, MethodHandle i, MethodHandle c, MethodHandle t)

   560                         { super(e, i, c, t); }

   561         protected A5 makeInstance(MethodHandle e, MethodHandle i, MethodHandle c, MethodHandle t)

   562                         { return new A5(e, i, c, t); }

   563         protected Object invoke_L5(Object a0, Object a1, Object a2, Object a3, Object a4) throws Throwable { return convert_L((Object)invoker.invokeExact(target, a0, a1, a2, a3, a4)); }

   564         protected Object invoke_I5(Object a0, Object a1, Object a2, Object a3, Object a4) throws Throwable { return convert_I((int)   invoker.invokeExact(target, a0, a1, a2, a3, a4)); }

   565         protected Object invoke_J5(Object a0, Object a1, Object a2, Object a3, Object a4) throws Throwable { return convert_J((long)  invoker.invokeExact(target, a0, a1, a2, a3, a4)); }

   566         protected Object invoke_F5(Object a0, Object a1, Object a2, Object a3, Object a4) throws Throwable { return convert_F((float) invoker.invokeExact(target, a0, a1, a2, a3, a4)); }

   567         protected Object invoke_D5(Object a0, Object a1, Object a2, Object a3, Object a4) throws Throwable { return convert_D((double)invoker.invokeExact(target, a0, a1, a2, a3, a4)); }

   568     }

   569     static class A6 extends Adapter {

   570         protected A6(MethodHandle entryPoint) { super(entryPoint); }  // to build prototype

   571         protected A6(MethodHandle e, MethodHandle i, MethodHandle c, MethodHandle t)

   572                         { super(e, i, c, t); }

   573         protected A6 makeInstance(MethodHandle e, MethodHandle i, MethodHandle c, MethodHandle t)

   574                         { return new A6(e, i, c, t); }

   575         protected Object invoke_L6(Object a0, Object a1, Object a2, Object a3, Object a4, Object a5) throws Throwable { return convert_L((Object)invoker.invokeExact(target, a0, a1, a2, a3, a4, a5)); }

   576         protected Object invoke_I6(Object a0, Object a1, Object a2, Object a3, Object a4, Object a5) throws Throwable { return convert_I((int)   invoker.invokeExact(target, a0, a1, a2, a3, a4, a5)); }

   577         protected Object invoke_J6(Object a0, Object a1, Object a2, Object a3, Object a4, Object a5) throws Throwable { return convert_J((long)  invoker.invokeExact(target, a0, a1, a2, a3, a4, a5)); }

   578         protected Object invoke_F6(Object a0, Object a1, Object a2, Object a3, Object a4, Object a5) throws Throwable { return convert_F((float) invoker.invokeExact(target, a0, a1, a2, a3, a4, a5)); }

   579         protected Object invoke_D6(Object a0, Object a1, Object a2, Object a3, Object a4, Object a5) throws Throwable { return convert_D((double)invoker.invokeExact(target, a0, a1, a2, a3, a4, a5)); }

   580     }

   581     static class A7 extends Adapter {

   582         protected A7(MethodHandle entryPoint) { super(entryPoint); }  // to build prototype

   583         protected A7(MethodHandle e, MethodHandle i, MethodHandle c, MethodHandle t)

   584                         { super(e, i, c, t); }

   585         protected A7 makeInstance(MethodHandle e, MethodHandle i, MethodHandle c, MethodHandle t)

   586                         { return new A7(e, i, c, t); }

   587         protected Object invoke_L7(Object a0, Object a1, Object a2, Object a3, Object a4, Object a5, Object a6) throws Throwable { return convert_L((Object)invoker.invokeExact(target, a0, a1, a2, a3, a4, a5, a6)); }

   588         protected Object invoke_I7(Object a0, Object a1, Object a2, Object a3, Object a4, Object a5, Object a6) throws Throwable { return convert_I((int)   invoker.invokeExact(target, a0, a1, a2, a3, a4, a5, a6)); }

   589         protected Object invoke_J7(Object a0, Object a1, Object a2, Object a3, Object a4, Object a5, Object a6) throws Throwable { return convert_J((long)  invoker.invokeExact(target, a0, a1, a2, a3, a4, a5, a6)); }

   590         protected Object invoke_F7(Object a0, Object a1, Object a2, Object a3, Object a4, Object a5, Object a6) throws Throwable { return convert_F((float) invoker.invokeExact(target, a0, a1, a2, a3, a4, a5, a6)); }

   591         protected Object invoke_D7(Object a0, Object a1, Object a2, Object a3, Object a4, Object a5, Object a6) throws Throwable { return convert_D((double)invoker.invokeExact(target, a0, a1, a2, a3, a4, a5, a6)); }

   592     }

   593     static class A8 extends Adapter {

   594         protected A8(MethodHandle entryPoint) { super(entryPoint); }  // to build prototype

   595         protected A8(MethodHandle e, MethodHandle i, MethodHandle c, MethodHandle t)

   596                         { super(e, i, c, t); }

   597         protected A8 makeInstance(MethodHandle e, MethodHandle i, MethodHandle c, MethodHandle t)

   598                         { return new A8(e, i, c, t); }

   599         protected Object invoke_L8(Object a0, Object a1, Object a2, Object a3, Object a4, Object a5, Object a6, Object a7) throws Throwable { return convert_L((Object)invoker.invokeExact(target, a0, a1, a2, a3, a4, a5, a6, a7)); }

   600         protected Object invoke_I8(Object a0, Object a1, Object a2, Object a3, Object a4, Object a5, Object a6, Object a7) throws Throwable { return convert_I((int)   invoker.invokeExact(target, a0, a1, a2, a3, a4, a5, a6, a7)); }

   601         protected Object invoke_J8(Object a0, Object a1, Object a2, Object a3, Object a4, Object a5, Object a6, Object a7) throws Throwable { return convert_J((long)  invoker.invokeExact(target, a0, a1, a2, a3, a4, a5, a6, a7)); }

   602         protected Object invoke_F8(Object a0, Object a1, Object a2, Object a3, Object a4, Object a5, Object a6, Object a7) throws Throwable { return convert_F((float) invoker.invokeExact(target, a0, a1, a2, a3, a4, a5, a6, a7)); }

   603         protected Object invoke_D8(Object a0, Object a1, Object a2, Object a3, Object a4, Object a5, Object a6, Object a7) throws Throwable { return convert_D((double)invoker.invokeExact(target, a0, a1, a2, a3, a4, a5, a6, a7)); }

   604     }

   605     static class A9 extends Adapter {

   606         protected A9(MethodHandle entryPoint) { super(entryPoint); }  // to build prototype

   607         protected A9(MethodHandle e, MethodHandle i, MethodHandle c, MethodHandle t)

   608                         { super(e, i, c, t); }

   609         protected A9 makeInstance(MethodHandle e, MethodHandle i, MethodHandle c, MethodHandle t)

   610                         { return new A9(e, i, c, t); }

   611         protected Object invoke_L9(Object a0, Object a1, Object a2, Object a3, Object a4, Object a5, Object a6, Object a7, Object a8) throws Throwable { return convert_L((Object)invoker.invokeExact(target, a0, a1, a2, a3, a4, a5, a6, a7, a8)); }

   612         protected Object invoke_I9(Object a0, Object a1, Object a2, Object a3, Object a4, Object a5, Object a6, Object a7, Object a8) throws Throwable { return convert_I((int)   invoker.invokeExact(target, a0, a1, a2, a3, a4, a5, a6, a7, a8)); }

   613         protected Object invoke_J9(Object a0, Object a1, Object a2, Object a3, Object a4, Object a5, Object a6, Object a7, Object a8) throws Throwable { return convert_J((long)  invoker.invokeExact(target, a0, a1, a2, a3, a4, a5, a6, a7, a8)); }

   614         protected Object invoke_F9(Object a0, Object a1, Object a2, Object a3, Object a4, Object a5, Object a6, Object a7, Object a8) throws Throwable { return convert_F((float) invoker.invokeExact(target, a0, a1, a2, a3, a4, a5, a6, a7, a8)); }

   615         protected Object invoke_D9(Object a0, Object a1, Object a2, Object a3, Object a4, Object a5, Object a6, Object a7, Object a8) throws Throwable { return convert_D((double)invoker.invokeExact(target, a0, a1, a2, a3, a4, a5, a6, a7, a8)); }

   616     }

   617     static class A10 extends Adapter {

   618         protected A10(MethodHandle entryPoint) { super(entryPoint); }  // to build prototype

   619         protected A10(MethodHandle e, MethodHandle i, MethodHandle c, MethodHandle t)

   620                         { super(e, i, c, t); }

   621         protected A10 makeInstance(MethodHandle e, MethodHandle i, MethodHandle c, MethodHandle t)

   622                         { return new A10(e, i, c, t); }

   623         protected Object invoke_L10(Object a0, Object a1, Object a2, Object a3, Object a4, Object a5, Object a6, Object a7, Object a8, Object a9) throws Throwable { return convert_L((Object)invoker.invokeExact(target, a0, a1, a2, a3, a4, a5, a6, a7, a8, a9)); }

   624         protected Object invoke_I10(Object a0, Object a1, Object a2, Object a3, Object a4, Object a5, Object a6, Object a7, Object a8, Object a9) throws Throwable { return convert_I((int)   invoker.invokeExact(target, a0, a1, a2, a3, a4, a5, a6, a7, a8, a9)); }

   625         protected Object invoke_J10(Object a0, Object a1, Object a2, Object a3, Object a4, Object a5, Object a6, Object a7, Object a8, Object a9) throws Throwable { return convert_J((long)  invoker.invokeExact(target, a0, a1, a2, a3, a4, a5, a6, a7, a8, a9)); }

   626         protected Object invoke_F10(Object a0, Object a1, Object a2, Object a3, Object a4, Object a5, Object a6, Object a7, Object a8, Object a9) throws Throwable { return convert_F((float) invoker.invokeExact(target, a0, a1, a2, a3, a4, a5, a6, a7, a8, a9)); }

   627         protected Object invoke_D10(Object a0, Object a1, Object a2, Object a3, Object a4, Object a5, Object a6, Object a7, Object a8, Object a9) throws Throwable { return convert_D((double)invoker.invokeExact(target, a0, a1, a2, a3, a4, a5, a6, a7, a8, a9)); }

   628     }

   629 }