invokedynamic example in BiteScript

gistfile1.rb

import java.lang.invoke.MethodHandle
import java.lang.invoke.MethodType
import java.lang.invoke.CallSite
import java.lang.invoke.ConstantCallSite
import java.lang.invoke.MethodHandles::Lookup
JClass = java.lang.Class

# Our main method, which does one invokedynamic
main do
  # handle for our bootstrap, which binds invokedynamic to a CallSite
  bootstrap = mh_invokestatic this, 'bootstrap', CallSite, Lookup, string, MethodType

  ldc 'Hello, invokedynamic!'
  invokedynamic 'print', [void, string], bootstrap
  returnvoid
end

# The method we want to invoke, prints given string
public_static_method :print, [], void, string do
  aload 0
  aprintln
  returnvoid
end

# The bootstrap method, which binds our dynamic call
public_static_method :bootstrap, [], CallSite, Lookup, string, MethodType do
  # Constant since we bind just once directly
  new ConstantCallSite
  dup

  # Locate the method indicated by name + type on current class
  aload 0   # Lookup
  ldc this  # this class
  aload 1   # String
  aload 2   # MethodType
  invokevirtual Lookup, 'findStatic', [MethodHandle, JClass, string, MethodType]

  # finish constructing call site and return
  invokespecial ConstantCallSite, '<init>', [void, MethodHandle]
  areturn
end

Nice.

Does the mh_invokestatic look up a real method handle, or an ASM method handle shim? If possible, it would be good to have the latter instead of the former.

Latter.

…

On Sun, May 8, 2011 at 2:53 AM, olabini ***@***.*** wrote: Nice. Does the mh_invokestatic look up a real method handle, or an ASM method handle shim? If possible, it would be good to have the latter instead of the former. ## Reply to this email directly or view it on GitHub: https://gist.github.com/961054

Latter. The changes are pushed to BiteScript master now, so you can have a look.