web/examples/ffi.flan opened with (declare cos-f64 [x f64] f64 "cos"), which
was a fine one-liner until the prelude grew cos-f64 an hour ago. @page caught
it: "cos-f64 is defined twice", with the prelude line named as the other site.
It is cosh now. Same shape, same answer, and the collision is worth keeping in
the page rather than editing around silently -- a reader reaching for a libm
function needs to know the common ones are already there and that a second
declaration of a name is refused, not shadowed. The example says so in one
sentence.
This is the cost of filling out the prelude, and it is the whole of it: a
program that declared one of the new names for itself stops compiling, with
both sites named. Nothing in the corpus or in examples/ hit it; this page did.
Joseph Ferano
98dce374d1