108  *                 t5:L = MethodHandle#invoke(t4, t3, a1); t5 }
 109  *     == general invoker for unary/unary foldArgument combination
 110  * (a0:L, a1:I)=>{ t2:I = identity(long).asType((int)->long)(a1); t2 }
 111  *     == invoker for identity method handle which performs i2l
 112  * (a0:L, a1:L)=>{ t2:L = BoundMethodHandle#argument(a0);
 113  *                 t3:L = Class#cast(t2,a1); t3 }
 114  *     == invoker for identity method handle which performs cast
 115  * }</pre></blockquote>
 116  * <p>
 117  * @author John Rose, JSR 292 EG
 118  */
 119 class LambdaForm {
 120     final int arity;
 121     final int result;
 122     final boolean forceInline;
 123     @Stable final Name[] names;
 124     final String debugName;
 125     MemberName vmentry;   // low-level behavior, or null if not yet prepared
 126     private boolean isCompiled;
 127 
 128     Object transformCache;  // managed by LambdaFormEditor
 129 
 130     public static final int VOID_RESULT = -1, LAST_RESULT = -2;
 131 
 132     enum BasicType {
 133         L_TYPE('L', Object.class, Wrapper.OBJECT),  // all reference types
 134         I_TYPE('I', int.class,    Wrapper.INT),
 135         J_TYPE('J', long.class,   Wrapper.LONG),
 136         F_TYPE('F', float.class,  Wrapper.FLOAT),
 137         D_TYPE('D', double.class, Wrapper.DOUBLE),  // all primitive types
 138         V_TYPE('V', void.class,   Wrapper.VOID);    // not valid in all contexts
 139 
 140         static final BasicType[] ALL_TYPES = BasicType.values();
 141         static final BasicType[] ARG_TYPES = Arrays.copyOf(ALL_TYPES, ALL_TYPES.length-1);
 142 
 143         static final int ARG_TYPE_LIMIT = ARG_TYPES.length;
 144         static final int TYPE_LIMIT = ALL_TYPES.length;
 145 
 146         private final char btChar;
 147         private final Class<?> btClass;
 148         private final Wrapper btWrapper;

 108  *                 t5:L = MethodHandle#invoke(t4, t3, a1); t5 }
 109  *     == general invoker for unary/unary foldArgument combination
 110  * (a0:L, a1:I)=>{ t2:I = identity(long).asType((int)->long)(a1); t2 }
 111  *     == invoker for identity method handle which performs i2l
 112  * (a0:L, a1:L)=>{ t2:L = BoundMethodHandle#argument(a0);
 113  *                 t3:L = Class#cast(t2,a1); t3 }
 114  *     == invoker for identity method handle which performs cast
 115  * }</pre></blockquote>
 116  * <p>
 117  * @author John Rose, JSR 292 EG
 118  */
 119 class LambdaForm {
 120     final int arity;
 121     final int result;
 122     final boolean forceInline;
 123     @Stable final Name[] names;
 124     final String debugName;
 125     MemberName vmentry;   // low-level behavior, or null if not yet prepared
 126     private boolean isCompiled;
 127 
 128     volatile Object transformCache;  // managed by LambdaFormEditor
 129 
 130     public static final int VOID_RESULT = -1, LAST_RESULT = -2;
 131 
 132     enum BasicType {
 133         L_TYPE('L', Object.class, Wrapper.OBJECT),  // all reference types
 134         I_TYPE('I', int.class,    Wrapper.INT),
 135         J_TYPE('J', long.class,   Wrapper.LONG),
 136         F_TYPE('F', float.class,  Wrapper.FLOAT),
 137         D_TYPE('D', double.class, Wrapper.DOUBLE),  // all primitive types
 138         V_TYPE('V', void.class,   Wrapper.VOID);    // not valid in all contexts
 139 
 140         static final BasicType[] ALL_TYPES = BasicType.values();
 141         static final BasicType[] ARG_TYPES = Arrays.copyOf(ALL_TYPES, ALL_TYPES.length-1);
 142 
 143         static final int ARG_TYPE_LIMIT = ARG_TYPES.length;
 144         static final int TYPE_LIMIT = ALL_TYPES.length;
 145 
 146         private final char btChar;
 147         private final Class<?> btClass;
 148         private final Wrapper btWrapper;