Feature: Support string prefix parsing #995
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This adds support for parsing json from the prefix of a string. It does so via two small api additions: - Deserializer now has the `into_reader` associated function, which consume the deserializer and returns reader it has been using. - StrRead and SliceRead now have the `index` associated function, which reports the byte index of the data which will be read next. These can be used to parse a single value (or multiple values) from an input string or buffer, and then recover the next byte position from the reader. It allows the json parser to be easily integrated into an outer parser, where the JSON data is sitting inside some larger non-JSON context.
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This adds support for parsing json from the prefix of a string. It does so via two small api additions:
Deserializer now has the
into_readerassociated function, which consume the deserializer and returns reader it has been using.StrRead and SliceRead now have the
indexassociated function, which reports the byte index of the data which will be read next.These can be used to parse a single value (or multiple values) from an input string or buffer, and then recover the next byte position from the reader. It allows the json parser to be easily integrated into an outer parser, where the JSON data is sitting inside some larger non-JSON context.