Function bloomHasToken

packages/core/src/render3/di.ts:849–867

(
  bloomHash: number,
  injectorIndex: number,
  injectorView: LView | TData,
)

}

export function bloomHasToken(
  bloomHash: number,
  injectorIndex: number,
  injectorView: LView | TData,
) {
  // Create a mask that targets the specific bit associated with the directive we're looking for.
  // JS bit operations are 32 bits, so this will be a number between 2^0 and 2^31, corresponding
  // to bit positions 0 - 31 in a 32 bit integer.
  const mask = 1 << bloomHash;

  // Each bloom bucket in `injectorView` represents `BLOOM_BUCKET_BITS` number of bits of
  // `bloomHash`. Any bits in `bloomHash` beyond `BLOOM_BUCKET_BITS` indicate the bucket offset
  // that should be used.
  const value = injectorView[injectorIndex + (bloomHash >> BLOOM_BUCKET_BITS)];

  // If the bloom filter value has the bit corresponding to the directive's bloomBit flipped on,
  // this injector is a potential match.
  return !!(value & mask);
}

/** Returns true if flags prevent parent injector from being searched for tokens */
function shouldSearchParent(