TraceContext.SpanDraw.check: def of bend-trace-context@0.2.0.0
Import: import bend-trace-context@0.2.0.0/trace_context.bend as TraceContext
Lines 1166-1177 of bend-trace-context@0.2.0.0/trace_context.bend: https://jend.leeeet.dev/read.txt?path=bend-trace-context@0.2.0.0/trace_context.bend&start_line=1166&end_line=1177

import Base

# Check a complete span ID candidate: zero and the excluded span ID are
# retried; anything else is the span ID drawn.
def SpanDraw.check(candidate: Maybe<&2, SpanId>, excluded: Maybe<&2, SpanId>, remaining: Nat) -> SpanStep:
  match candidate:
    case None{}:
      SpanDraw.retry(remaining, excluded)
    case Some{+id}:
      match excluded:
        case None{}:
          DrawnSpanId{id}
        case Some{+old}:
          SpanDraw.reuse(SpanId.is_eq(id, old), id, old, remaining)

Uses (7):
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=Maybe
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=Nat
  https://jend.leeeet.dev/definition.txt?path=bend-trace-context@0.2.0.0/trace_context.bend&name=SpanDraw.retry
  https://jend.leeeet.dev/definition.txt?path=bend-trace-context@0.2.0.0/trace_context.bend&name=SpanDraw.reuse
  https://jend.leeeet.dev/definition.txt?path=bend-trace-context@0.2.0.0/trace_context.bend&name=SpanId
  https://jend.leeeet.dev/definition.txt?path=bend-trace-context@0.2.0.0/trace_context.bend&name=SpanId.is_eq
  https://jend.leeeet.dev/definition.txt?path=bend-trace-context@0.2.0.0/trace_context.bend&name=SpanStep