const unicode/utf8.maskx

25 uses

	unicode/utf8 (current package)
		utf8.go#L36: 	maskx = 0b00111111
		utf8.go#L175: 		return rune(p0&mask2)<<6 | rune(b1&maskx), 2
		utf8.go#L182: 		return rune(p0&mask3)<<12 | rune(b1&maskx)<<6 | rune(b2&maskx), 3
		utf8.go#L188: 	return rune(p0&mask4)<<18 | rune(b1&maskx)<<12 | rune(b2&maskx)<<6 | rune(b3&maskx), 4
		utf8.go#L223: 		return rune(s0&mask2)<<6 | rune(s1&maskx), 2
		utf8.go#L230: 		return rune(s0&mask3)<<12 | rune(s1&maskx)<<6 | rune(s2&maskx), 3
		utf8.go#L236: 	return rune(s0&mask4)<<18 | rune(s1&maskx)<<12 | rune(s2&maskx)<<6 | rune(s3&maskx), 4
		utf8.go#L351: 		p[1] = tx | byte(r)&maskx
		utf8.go#L359: 		p[1] = tx | byte(r>>6)&maskx
		utf8.go#L360: 		p[2] = tx | byte(r)&maskx
		utf8.go#L365: 		p[1] = tx | byte(r>>12)&maskx
		utf8.go#L366: 		p[2] = tx | byte(r>>6)&maskx
		utf8.go#L367: 		p[3] = tx | byte(r)&maskx
		utf8.go#L387: 		return append(p, t2|byte(r>>6), tx|byte(r)&maskx)
		utf8.go#L392: 		return append(p, t3|byte(r>>12), tx|byte(r>>6)&maskx, tx|byte(r)&maskx)
		utf8.go#L394: 		return append(p, t4|byte(r>>18), tx|byte(r>>12)&maskx, tx|byte(r>>6)&maskx, tx|byte(r)&maskx)