Method scanString

internal/scanner/scanner.go:1586–1636

(jsxAttributeString bool)

}

func (s *Scanner) scanString(jsxAttributeString bool) string {
	quote := s.char()
	if quote == '\'' {
		s.tokenFlags |= ast.TokenFlagsSingleQuote
	}
	s.pos++
	// Fast path for simple strings without escape sequences.
	strLen := strings.IndexByte(s.text[s.pos:], byte(quote))
	if strLen == 0 {
		s.pos++
		return ""
	}
	if strLen > 0 {
		str := s.text[s.pos : s.pos+strLen]
		if jsxAttributeString ||
			strings.IndexByte(str, '\\') < 0 && strings.IndexByte(str, '\r') < 0 && strings.IndexByte(str, '\n') < 0 {
			s.pos += strLen + 1
			return str
		}
	}
	var sb strings.Builder
	start := s.pos
	for {
		ch := s.char()
		if ch < 0 {
			sb.WriteString(s.text[start:s.pos])
			s.tokenFlags |= ast.TokenFlagsUnterminated
			s.error(diagnostics.Unterminated_string_literal)
			break
		}
		if ch == quote {
			sb.WriteString(s.text[start:s.pos])
			s.pos++
			break
		}
		if ch == '\\' && !jsxAttributeString {
			sb.WriteString(s.text[start:s.pos])
			sb.WriteString(s.scanEscapeSequence(EscapeSequenceScanningFlagsString | EscapeSequenceScanningFlagsReportErrors))
			start = s.pos
			continue
		}
		if (ch == '\n' || ch == '\r') && !jsxAttributeString {
			sb.WriteString(s.text[start:s.pos])
			s.tokenFlags |= ast.TokenFlagsUnterminated
			s.error(diagnostics.Unterminated_string_literal)
			break
		}
		s.pos++
	}
	return sb.String()
}

func (s *Scanner) scanTemplateAndSetTokenValue(shouldEmitInvalidEscapeError bool) ast.Kind {
	startedWithBacktick := s.char() == '`'