Between-Opcode Callbacks

[David M. Lloyd]

Here's a feature suggestion for Perl 6.

It would be nice to be able to tell the interpreter to call a user-defined
C function between opcodes.  This could make it easier to implement
debuggers, profilers, etc. as well as providing a method of safely using
asynchronous callbacks that certain C libraries like to use.

Of course, if you guys already have a better scheme in mind, don't let me
stop you. :-)

- D

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