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InfluxDB
Power Real-Time Data Analytics at Scale. Get real-time insights from all types of time series data with InfluxDB. Ingest, query, and analyze billions of data points in real-time with unbounded cardinality.
The documentation says that they are bound to values associated previously by the parser with the symbols on the rhs of the rule. I however do not understand their use case based on their example. SO I went and found this calculator that uses leex and yecc to tokenize and parse the input.
Here is a bigger example https://github.com/sebastiw/gpb_text/blob/main/src/gpb_text_parser.yrl
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