// vfmt off
@[flag]
enum PawnsBoard as u64 {
	a8 b8 c8 d8 e8 f8 g8 h8
	a7 b7 c7 d7 e7 f7 g7 h7
	a6 b6 c6 d6 e6 f6 g6 h6
	a5 b5 c5 d5 e5 f5 g5 h5
	a4 b4 c4 d4 e4 f4 g4 h4
	a3 b3 c3 d3 e3 f3 g3 h3
	a2 b2 c2 d2 e2 f2 g2 h2
	a1 b1 c1 d1 e1 f1 g1 h1
}
// vfmt on

fn test_flag_enum_with_64_value_bits() {
	last_value := PawnsBoard.h1
	dump(last_value)
	dump(u64(last_value))
	assert u64(last_value) == 0x8000_0000_0000_0000

	wb := PawnsBoard.a2 | .b2 | .c2 | .d2 | .e2 | .f2 | .g2 | .h2
	dump(wb)
	dump(u64(wb))
	assert u64(wb) == 71776119061217280
	assert '${u64(wb):064b}' == '0000000011111111000000000000000000000000000000000000000000000000'
	assert '${wb}' == 'PawnsBoard{.a2 | .b2 | .c2 | .d2 | .e2 | .f2 | .g2 | .h2}'

	bb := PawnsBoard.a7 | .b7 | .c7 | .d7 | .e7 | .f7 | .g7 | .h7
	dump(bb)
	dump(u64(bb))
	assert u64(bb) == 65280
	assert '${u64(bb):064b}' == '0000000000000000000000000000000000000000000000001111111100000000'
	//	assert '${bb}' == 'PawnsBoard{.a7 | .b7 | .c7 | .d7 | .e7 | .f7 | .g7 | .h7}'

	if false {
		eprintln('----------------------------------------------')
		for x in [PawnsBoard.a1, .a2, .a3, .a4, .a5, .a6, .a7, .a8] {
			eprintln('>> x: ${x} | hex value: ${u64(x).hex()}')
		}
		eprintln('----------------------------------------------')
		for x in [PawnsBoard.b1, .b2, .b3, .b4, .b5, .b6, .b7, .b8] {
			eprintln('>> x: ${x} | hex value: ${u64(x).hex()}')
		}
		eprintln('----------------------------------------------')
		for x in [PawnsBoard.c1, .c2, .c3, .c4, .c5, .c6, .c7, .c8] {
			eprintln('>> x: ${x} | hex value: ${u64(x).hex()}')
		}
		eprintln('----------------------------------------------')
		for x in [PawnsBoard.d1, .d2, .d3, .d4, .d5, .d6, .d7, .d8] {
			eprintln('>> x: ${x} | hex value: ${u64(x).hex()}')
		}
		eprintln('----------------------------------------------')
		for x in [PawnsBoard.e1, .e2, .e3, .e4, .e5, .e6, .e7, .e8] {
			eprintln('>> x: ${x} | hex value: ${u64(x).hex()}')
		}
		eprintln('----------------------------------------------')
		for x in [PawnsBoard.f1, .f2, .f3, .f4, .f5, .f6, .f7, .f8] {
			eprintln('>> x: ${x} | hex value: ${u64(x).hex()}')
		}
		eprintln('----------------------------------------------')
		for x in [PawnsBoard.g1, .g2, .g3, .g4, .g5, .g6, .g7, .g8] {
			eprintln('>> x: ${x} | hex value: ${u64(x).hex()}')
		}
		eprintln('----------------------------------------------')
		for x in [PawnsBoard.h1, .h2, .h3, .h4, .h5, .h6, .h7, .h8] {
			eprintln('>> x: ${x} | hex value: ${u64(x).hex()}')
		}
	}
}