Implementations provided for ready use.
| PosStr | A TextChunk implementation for borrowed string slices (&str) that knows
what position in its original source string it is at. This is useful for
zero-copy parsing of in-memory UTF-8 strings.
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| PosStrIter | A [chunk::SourceStream] (and Iterator) of the characters, and their
positions, of the text chunk that a PosStr represents.
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| StrPos | A SourcePosition type for character or slice values from text sources that
are entire str strings where we can know the original source and the
relative position.
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