Method scanASCIIWhile

internal/scanner/scanner.go:456–467

scanASCIIWhile advances s.pos over the longest run of ASCII bytes for which pred returns true. It stops at end-of-text, the first non-ASCII byte, or the first byte where pred is false.

(pred func(byte) bool)

// pred returns true. It stops at end-of-text, the first non-ASCII byte, or the
// first byte where pred is false.
func (s *Scanner) scanASCIIWhile(pred func(byte) bool) {
	text := s.text[s.pos:s.end]
	i := 0
	for i < len(text) {
		b := text[i]
		if b >= utf8.RuneSelf || !pred(b) {
			break
		}
		i++
	}
	s.pos += i
}

func (s *Scanner) Scan() ast.Kind {
	s.fullStartPos = s.pos