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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.
By grepping modifier_if, you will find lex.c.blt has a table of keywords in the function rb_reserved_word.
I think most Rubyists does not care about corner cases like this; However I needed to figure out this because I'm making my original programming language Shiika which has Ruby-like syntax.
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