A bundle allows tasks and networks to be configurable, which means their behavior can be influenced by overriding parts of the bundle at instantiation. A bundle is a stateless entity that defines types, constants, and functions that are common to several tasks and networks.

package com.synflow.sha256;

 * Description of the SHACommon bundle
bundle SHACommon {
  // type definition
  typedef u6 addr_t;

  // constant definition
  u9 HASH_SIZE = 256;

  u32 Ch(u32 x, u32 y, u32 z) {
    return (x & y) ^ (~x & z);

  u32 Maj(u32 x, u32 y, u32 z) {
    return (x & y) ^ (x & z) ^ (y & z);

The constants, types, functions of a bundle can be referenced in other entities in three different ways. In the "SHACommon" bundle above, the "addr" type, the "HASH_SIZE" constant, and the "Ch" and "Maj" functions can be referenced as follows:

  1. Typical, shortest way: import everything from the bundle, and reference them by their short name, like addr or Ch.
  2. Reasonably short way: import the bundle, and reference objects by their qualified name SHACommon.addr or SHACommon.Ch.
  3. Verbose way: Reference objects by their full name: com.synflow.sha256.SHACommon.addr or com.synflow.sha256.SHACommon

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