On Mon, 22 Dec 2014 23:25:11 +0000 via Digitalmars-d <digitalmars-d@puremagic.com> wrote:
> On Monday, 22 December 2014 at 21:52:12 UTC, ketmar via > Digitalmars-d wrote: > >> Thanks, I forgot that one. Immutable values by default is > >> indeed an important improvement. All by-value parameters to > >> functions should be immutable, period. > > > > but why? O_O > > Because it is safer in long functions where you might miss a > modification of the input parameter when editing an existing > function, and copying from immutable to mutable is free if the > parameter is left alone after the copy. i really really hate immutable integer args, for example, and can't see any sense in doing it. that's why i wondered.
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