void main()
{
	dchar d;
	d = false;
	d = true;
	char c;
	c = false;
	c = true;
}

On Saturday, 7 August 2021 at 21:45:09 UTC, apz28 wrote:

void main()
{
	dchar d;
	d = false;
	d = true;
	char c;
	c = false;
	c = true;
}

true is 1 and false is 0. These are valid char and dchar values. Some people and languages are on board with this (like APL, quote: "Ken asked Wolfram why it was that in Mathematica propositions don’t have values 0 and 1 as in APL instead of True and False. Wolfram replied that he had no objections, but the Mathematica implementers were against it."), and some aren't.

assert(2 == true+true);
assert('a' == "ab"[3 > 5]);
assert(2 == iota(5).map!"a>2".sum);