function labelInside(code) {
    if (
      code === codes.eof ||
      code === codes.leftSquareBracket ||
      code === codes.rightSquareBracket ||
      markdownLineEnding(code) ||
      size++ > constants.linkReferenceSizeMax
    ) {
      effects.exit(types.chunkString)
      return atBreak(code)
    }

    effects.consume(code)
    if (!seen) seen = !markdownSpace(code)
    return code === codes.backslash ? labelEscape : labelInside
  }
In label, in text.

```markdown
> | [a]
     ^
```

@type {State}