[Issue 7455] Allow a cast to discard precision from a floating point during constant folding

[d-bugmail at puremagic.com]

http://d.puremagic.com/issues/show_bug.cgi?id=7455


Don <clugdbug at yahoo.com.au> changed:

           What    |Removed                     |Added
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                 CC|                            |clugdbug at yahoo.com.au


--- Comment #2 from Don <clugdbug at yahoo.com.au> 2012-02-12 18:31:52 PST ---
(In reply to comment #1)
> http://dlang.org/float.html
> "Regardless of the type of the operands, floating point constant folding is
> done in real or greater precision."
> 
> I agree that an explicit cast should override this behaviour, at least to the
> point of discarding the extra precision from its operand, but it's technically
> an enhancement request.

There's no constant folding involved, but:

"For floating point operations and expression intermediate values, a greater
precision can be used than the type of the expression. Only the minimum
precision is set by the types of the operands, not the maximum."

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