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authorEuAndreh <eu@euandre.org>2025-04-18 02:17:12 -0300
committerEuAndreh <eu@euandre.org>2025-04-18 02:48:42 -0300
commit020c1e77489b772f854bb3288b9c8d2818a6bf9d (patch)
tree142aec725a52162a446ea7d947cb4347c9d573c9 /src/content/en/pastebins/2023/07/22
parentMakefile: Remove security.txt.gz (diff)
downloadeuandre.org-020c1e77489b772f854bb3288b9c8d2818a6bf9d.tar.gz
euandre.org-020c1e77489b772f854bb3288b9c8d2818a6bf9d.tar.xz
git mv src/content/* src/content/en/
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diff --git a/src/content/en/pastebins/2023/07/22/funcallable-amop.adoc b/src/content/en/pastebins/2023/07/22/funcallable-amop.adoc
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+= Funcallable AMOP
+
+Using `macrolet` to allow a `funcallable-standard-class` to be invoked without
+using `funcall` directly, and let the macroexpansion do that instead:
+
+[source,lisp]
+----
+#!/usr/bin/env li
+
+(asdf:load-system :closer-mop)
+
+(defclass constructor ()
+ ((name :initarg :name :accessor constructor-name))
+ (:metaclass closer-mop:funcallable-standard-class))
+
+(defmethod initialize-instance :after ((c constructor) &key)
+ (with-slots (name) c
+ (closer-mop:set-funcallable-instance-function
+ c
+ (lambda (x)
+ (format t "~s: ~s - ~s~%" name :funcalled x)))))
+
+(let ((c (make-instance 'constructor :name "the-name")))
+ (funcall c 1))
+
+(let ((c (make-instance 'constructor :name "the-name")))
+ (macrolet ((c (&body body)
+ `(funcall c ,@body)))
+ (funcall c 2)
+ (c 3)))
+----