Bonded.flatten_bonds: def of bend-prot@0.1.0.0
Import: import bend-prot@0.1.0.0/bonded.bend as Bonded
Lines 124-130 of bend-prot@0.1.0.0/bonded.bend: https://jend.leeeet.dev/read.txt?path=bend-prot@0.1.0.0/bonded.bend&start_line=124&end_line=130

import Base

# Pair bonds -> flat [a, b, ..] so tests can re-scan (Data reuses).
def flatten_bonds(bs: List<&1, U32 & U32>) -> List<&2, U32>:
  match bs:
    case Nil{}:
      Nil{}
    case (x, y) <> t:
      x <> y <> flatten_bonds(t)

Uses (4):
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=List
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=Pair
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=Sigma
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=U32