def imid

bend-collections-laws-math@1.0.0.0 · src/math/generic.bend:379

import Base
import bend-collections-laws-math@1.0.0.0/src/math/num.bend as N

379# lo + (hi - lo) / 2, never above hi
380def imid(~T: Data, ~op: N.Op<T> -> T, +lo: T, +hi: T) -> T:
381  op(N.Add{lo, op(N.Half{op(N.Sub{hi, lo})})})