On Fri, Nov 21, 2014 at 10:59:13AM -0800, Walter Bright via Digitalmars-d wrote: > On 11/21/2014 6:03 AM, ketmar via Digitalmars-d wrote: > >On Thu, 20 Nov 2014 13:28:37 -0800 > >Walter Bright via Digitalmars-d <[email protected]> wrote: > > > >>On 11/20/2014 7:52 AM, H. S. Teoh via Digitalmars-d wrote: > >>>What *could* be improved, is the prevention of obvious mistakes in > >>>*mixing* signed and unsigned types. Right now, D allows code like > >>>the following with no warning: > >>> > >>> uint x; > >>> int y; > >>> auto z = x - y; > >>> > >>>BTW, this one is the same in essence as an actual bug that I fixed > >>>in druntime earlier this year, so downplaying it as a mistake > >>>people make 'cos they confound computer math with math math is > >>>fallacious. > >> > >>What about: > >> > >> uint x; > >> auto z = x - 1; > >> > >>? > >> > >here z must be `long`. and for `ulong` compiler must emit error. > > > So, any time an integer literal appears in an unsigned expression, the > type of the expression becomes signed?
And subtracting two ulongs gives a compile error?! Whoa, that is truly crippled. T -- Food and laptops don't mix.
