[Issue 2729] hash_t undocumented and unnecessary

[d-bugmail at puremagic.com]

http://d.puremagic.com/issues/show_bug.cgi?id=2729





------- Comment #1 from jlquinn at optonline.net  2009-03-12 00:02 -------
Additionally, the requirements for user-defined hashing for structs and classes
are inconsistent.

First, struct requirements are listed as needing 2 members:
  const uint toHash()
  const int opCmp(Keytype*)

Later, struct requirements are given again, but this time:
  hash_t toHash()
  bool opEquals(S) or bool opEquals(S*)
  int opCmp(S) or int opCmp(S*)

Classes are supposed to match the 2nd set of functions.

Shouldn't these functions be const?  And S should be replaced by "Keytype" or
the text above should state that S is a Keytype.


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