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A frequent use of
does> is for transferring some
values from definition-time to run-time. Gforth supports this use with
A typical use of this word is:
: curry+ ( n1 "name" -- ) 1 0 CONST-DOES> ( n2 -- n1+n2 ) + ; 3 curry+ 3+
1 0 means that 1 cell and 0 floats are transferred from
definition to run-time.
The advantages of using
does>, you have to introduce a
@that cannot be optimized away (because you could change the data using
const-does>avoids this problem.
An ANS Forth implementation of
const-does> is available in