toUpper Bug?

[Carl R. Witty]

Alastair David Reid <reid@cs.utah.edu> writes:

> We don't want to make 2 copies of the same code though (one in the
> Prelude but not exported, one in the correct place and exported)
> because it leads to code maintenance problems.  Suppose that toUpper
> had a bug in it - it'd be so easy to fix one copy and forget about the
> existence of the second.

How about making the Prelude export (and use) __prelude_toUpper; then
Char would have
  toUpper = __prelude_toUpper

> Another fix (the preferred fix) is to improve the Hugs compiler so
> that the code can have (almost) the same structure as in the report.
> We know how to do this (STG-Hugs had it) but it'll take a bit of time
> to figure out again exactly which changes are required because the
> special treatment of the Prelude is deeply wired into Hugs.  (More
> precisely, it'll take me a bit of time to find the time to look
> through the relevant archives.)

Of course, that would be better.

Carl Witty