Function invalidateCycleFlagOnAddition

packages/effect/src/Graph.ts:2229–2236

(
  mutable: GraphImpl<N, E, T>
)

/** @internal */
const invalidateCycleFlagOnAddition = <N, E, T extends Kind = "directed">(
  mutable: GraphImpl<N, E, T>
): void => {
  // Only invalidate if the graph was acyclic (adding edges cannot remove cycles from cyclic graphs).
  if (mutable.acyclic._tag === "Some" && mutable.acyclic.value === true) {
    mutable.acyclic = Option.none()
  }
}

// =============================================================================
// Edge Operations