Method charAt

internal/scanner/scanner.go:434–439

NOTE: this returns a rune, but only decodes the byte at the offset.

(offset int)

// NOTE: this returns a rune, but only decodes the byte at the offset.
func (s *Scanner) charAt(offset int) rune {
	if s.pos+offset < s.end {
		return rune(s.text[s.pos+offset])
	}
	return -1
}

func (s *Scanner) charAndSize() (rune, int) {
	// Fast path: a single ASCII byte. The vast majority of source bytes are