| 269 | } |
| 270 | |
| 271 | func (l *Lexer) scanRawString(quote rune) (n int) { |
| 272 | var escapedQuotes int |
| 273 | loop: |
| 274 | for { |
| 275 | ch := l.next() |
| 276 | for ch == quote && l.peek() == quote { |
| 277 | // skip current and next char which are the quote escape sequence |
| 278 | l.next() |
| 279 | ch = l.next() |
| 280 | escapedQuotes++ |
| 281 | } |
| 282 | switch ch { |
| 283 | case quote: |
| 284 | break loop |
| 285 | case eof: |
| 286 | l.error("literal not terminated") |
| 287 | return |
| 288 | } |
| 289 | n++ |
| 290 | } |
| 291 | str := l.source.String()[l.start.byte+1 : l.end.byte-1] |
| 292 | |
| 293 | // handle simple case where no quoted backtick was found, then no allocation |
| 294 | // is needed for the new string |
| 295 | if escapedQuotes == 0 { |
| 296 | l.emitValue(String, str) |
| 297 | return |
| 298 | } |
| 299 | |
| 300 | var b strings.Builder |
| 301 | var skipped bool |
| 302 | b.Grow(len(str) - escapedQuotes) |
| 303 | for _, r := range str { |
| 304 | if r == quote { |
| 305 | if !skipped { |
| 306 | skipped = true |
| 307 | continue |
| 308 | } |
| 309 | skipped = false |
| 310 | } |
| 311 | b.WriteRune(r) |
| 312 | } |
| 313 | l.emitValue(String, b.String()) |
| 314 | return |
| 315 | } |