1.1 --- a/src/share/classes/com/sun/tools/javac/code/Types.java Tue Jun 11 09:59:34 2013 +0100
1.2 +++ b/src/share/classes/com/sun/tools/javac/code/Types.java Fri Jun 14 16:25:09 2013 +0100
1.3 @@ -951,6 +951,22 @@
1.4 }
1.5
1.6 /**
1.7 + * A polymorphic signature method (JLS SE 7, 8.4.1) is a method that
1.8 + * (i) is declared in the java.lang.invoke.MethodHandle class, (ii) takes
1.9 + * a single variable arity parameter (iii) whose declared type is Object[],
1.10 + * (iv) has a return type of Object and (v) is native.
1.11 + */
1.12 + public boolean isSignaturePolymorphic(MethodSymbol msym) {
1.13 + List<Type> argtypes = msym.type.getParameterTypes();
1.14 + return (msym.flags_field & NATIVE) != 0 &&
1.15 + msym.owner == syms.methodHandleType.tsym &&
1.16 + argtypes.tail.tail == null &&
1.17 + argtypes.head.hasTag(TypeTag.ARRAY) &&
1.18 + msym.type.getReturnType().tsym == syms.objectType.tsym &&
1.19 + ((ArrayType)argtypes.head).elemtype.tsym == syms.objectType.tsym;
1.20 + }
1.21 +
1.22 + /**
1.23 * Is t the same type as s?
1.24 */
1.25 public boolean isSameType(Type t, Type s) {
