From: Samir Benmendil <me@rmz.io>
Date: Sun, 14 Jan 2018 00:24:21 +0000 (+0000)
Subject: Handle boolean constants
X-Git-Url: https://git.rmz.io/my-scheme.git/commitdiff_plain/081ba0cc6439a82a508100a59d6fa5dba80609d9?hp=081ba0cc6439a82a508100a59d6fa5dba80609d9

Handle boolean constants

Turns out that Scheme defines `#t` and `#f` to be `true` and `false`.

`let` is used to devife a new symbol `atom` which is a String.
`case...of` matches the literals and constructs a `LispVal` of the
appropriate type and value. `_` is a match all token.
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