Question about MethodHandles#explicitCastArgument

[Jochen Theodorou]

Hi,

I have a call to MethodHandles#explicitCastArgument with first argument 
being my 
MethodHandle(Groovy3135Bug,String,float,float,float,float,float)Object 
and the type I cast to being 
(Groovy3135Bug,String,Byte,Short,Integer,Long,Float)Object

Ignoring the first two I should have some kind of unboxing followed by 
casting for most arguments. In the javadoc to that method I read:
"""
If T0 is a reference and T1 a primitive, an unboxing conversion will be 
applied at runtime, possibly followed by a Java casting conversion (JLS 
5.5) on the primitive value, possibly followed by a conversion from byte 
to boolean by testing the low-order bit.
"""

Aren't T0 and T1 in my case for example T0=Byte and T1=float? Unless I 
mix up T0 and T1, this should be working, or not?

Well... it fails with a NPE... that can't be right, can it? If I first 
cast to an all-Object signature, and then to the target, then it 
works... but that can't be how it should be, or not?

bye Jochen


-- 
Jochen "blackdrag" Theodorou - Groovy Project Tech Lead
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