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Update comment in csv example.

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commit 65dd231fe4841b78d3506e9ee754555be11de993 1 parent ddbdbbe
@Ramarren authored
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  1. +2 −0  doc/example-csv.lisp
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2  doc/example-csv.lisp
@@ -52,6 +52,8 @@
;;; then it would create a spurious record with a single empty field in the parse.
;;; One way to resolve that is to fail the parse at end of input when attempting to locate a field.
+;;; This is implemented in the EXCEPT? parser combinator, but it is a basic MDO example, so let us
+;;; reimplement this here.
(defun real-field? ()
;;; MDO (monadic do, which is a macro providing sugar over monadic BIND) can be used to create a
;;; parser depending on the result of some previous parsers. While powerful, this can be
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