Exercise ‹6›:

Lexical ANTLR description for inexact constants in Scheme, like 35## 35#.## 356.3## 35. 35#. 0.#
In this way we represent a real number without leading zeros and with optional “.”, where some (but not all) of the least significant digits have been replaced by #.
Authors: Guillem Godoy (taken from Jordi Cortadella's exercise list) / Documentation:
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