Add impure concept

1 files changed, 12 insertions, 0 deletions

diff --git a/examples/impure-concept.lisp b/examples/impure-concept.lisp
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index 0000000..e612339
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+++ b/examples/impure-concept.lisp
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+; What color is your function?
+; Impure functions are functions that can call both pure and impure functions.
+; Pure functions can only call pure functions.
+; Impure function names end in an exclamation mark (!) by convention.
+; The top-level context is impure but has special rules
+;   related to (import!) and (let!).
+
+; pure function
+(let! f (\[x] x))
+
+; impure function
+(let! g (\![x] (print! x)))