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Marc Feeley wrote:
I repeat: in which implementations of Scheme will the multiple values API be faster than the equivalent pair of operations which return single values?
Ones in which the operation can be inlined by a compiler. Of course inlining may be contrary to a strict reading of at least R5RS, unless you're doing whole-program compilation, which further reduces the value of standardizing these functions. > I find SRFI 77's complexity to be a real turn-off when I
consider the changes required to implement it properly. Surely I'm not the only implementer to feel this way.
You're not. Though a tuned reference implementation that makes uses of a small number of implementation-optimized primitives would help. But please note that in some implementations "efficient fixnums" may mean unboxed C/C++/Java values rather than general Scheme values. Some of us need to be able to classify at compile time whether a name or expression is a boxed object or an unboxed native number. Similar for floating point - that is even more common, I suspect. -- --Per Bothner per@xxxxxxxxxxx http://per.bothner.com/