Github user JPercivall commented on the issue:
https://github.com/apache/nifi/pull/1018
@mattyb149, I agree with adding it to the lexer as a subset. I thought
through it a bit more and is someone passes "toLiteral('1.1')" they should
expect they would get a string with the value "1.1".
I'll do some research on the best way to parse double/floating points via
Antlr and post a new commit.
Thanks!
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