I've tried google and google scholar, wikipedia, and planetMath. Can't
find a description. Can someone point me to a freely available reference?
Thanks,
John Velman
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A box is a cell representing some value in a program. It generally
contains a pointer to code (a thunk), or to a proper value. When
evaluation of that box is forced for the first time, the code
executes, and when it is done, it updates the pointer with a pointer
to the result value. There are a
On Fri, Dec 09, 2005 at 02:29:33PM -0500, Cale Gibbard wrote:
A box is a cell representing some value in a program. It generally
contains a pointer to code (a thunk), or to a proper value. When
evaluation of that box is forced for the first time, the code
executes, and when it is done, it
Tomasz Zielonka:
...
there are other reasons to box values besides implementing laziness,
like for simplifying the memory model (which can simplify GC
implementation), allowing to intermix values of different types
(different kinds of polymorphism) or allow variable sized values (think
Thanks, this is very helpful.
John Velman
On Fri, Dec 09, 2005 at 02:29:33PM -0500, Cale Gibbard wrote:
A box is a cell representing some value in a program. It generally
...
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Hmmm I thought that arrays in Python have no reason to be boxed. Lists,
yes, since they are untyped, so they are arrays of pointers, but arrays are
homogeneous.
Python has a different meaning for list than the rest of the world.
When python says list, read boxed array (heterogeneous) and
