Per Bothner scripsit:

> * Kawa has a define-variable form which is used to explicitly mark
> dynamic variables.  I.e. these force dynamic run-time lookup, without
> inlining.  This is also a convenient way to turn off compile-time
> undefined-variable warnings/errors, for compilers that offer that.

It isn't clear to me whether define-variable implies dynamic binding, like
CL defvar (to which it is compared), or mere mutability in all contexts.

> * A mechanism to define "properties": Associate a variable with a pair
> of a getter and a setter function.  This allows generate read or write
> hooks (useful for debugging and many other purposes).  One might allow
> exporting of a getter/setter pair, which can be used as a variable.

I rather like SRFI 17, and I don't know why I never proposed adding
it to R7RS-small.  I have added it to RevoteDocket, which is the input
hopper for R7RS-large.

--
It was dreary and wearisome.  Cold clammy winter still held way in this
forsaken country.  The only green was the scum of livid weed on the dark
greasy surfaces of the sullen waters.  Dead grasses and rotting reeds loomed
up in the mists like ragged shadows of long-forgotten summers.
        --"The Passage of the Marshes"          http://www.ccil.org/~cowan

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