va-copy ( cursor -- copy )
ARM64 variable argument lists
Prev:va-arg ( c-type -- quot: ( cursor -- value ) )
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Vocabulary
alien.varargs

Inputs
cursora va-cursor


Outputs
copya va-cursor


Word description
Copies the current position. Reading either cursor does not advance the other. The copy borrows the same argument storage and expires with the same callback.

Errors
Throws expired-va-list when the source cursor cannot be used.

Definition
USING: kernel ;

IN: alien.varargs

: va-copy ( cursor -- copy ) dup check-va-list clone ;