3 ms·

This technique is very old -- it goes back at least to Pascal, IIRC, and probably to Algol 60. It certainly was used in Scheme implementations in the late 1970

This technique is very old -- it goes back at least to Pascal, IIRC, and probably to Algol 60. It certainly was used in Scheme implementations in the late 1970s. I haven't heard the term "upvalue" before, though.

haberman 11y ago
That's sort of my point. There seems to be some established knowledge about how you can address "upvalues" within closures but very little shared terminology or literature about it.
rjeli 11y ago
Tcl uses uplevel to evaluate a block of code in the current context.