On Mon, Jun 22, 2020 at 08:51:49PM +0000, mw via Digitalmars-d-learn wrote: [...] > > auto line = range.front; > > range.popFront; // pop immediately [...]
This is dangerous, because it assumes .front is not invalidated by .popFront. It will not work, for example, with byLine because .front returns a buffer which is reused by .popFront (a so-called "transient range"). In the realm of defensive programming, it is better to make less assumptions (don't assume .front remains valid after .popFront) than add implicit assumptions (range is non-transient) that may break in subtle ways that are not immediately obvious. T -- Why ask rhetorical questions? -- JC
