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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.
I haven't written any template engines, but I imagine you'd want to use a proper parser generator like nom, pest, etc. to get the statefulness you need. As the famous StackOverflow answer says, you can't parse a non-regular language with a regular expression... or at least not the kind of "no lookahead/lookbehind" regex engine Rust uses.
...or a macro like Maud.
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