A newbie Guiler asked me if there's something like "typeof" as "type" in
Python or "typeof" in JS.
I can't remember there's such a thing. But I think it'll provide
some convenient for a newbie to learn Guile.
Here's my patch.
What you guys think?
From 4518a8e05c027895e2e2f341273326b520259636 Mon Sep 17 00:00:00 2001
From: NalaGinrut <nalagin...@gmail.com>
Date: Tue, 27 Dec 2011 14:19:39 +0800
Subject: [PATCH 2/2] ADD type-of to goops.scm
---
module/oop/goops.scm | 13 ++++++++++++-
1 files changed, 12 insertions(+), 1 deletions(-)
diff --git a/module/oop/goops.scm b/module/oop/goops.scm
index e4424f3..d9eb583 100644
--- a/module/oop/goops.scm
+++ b/module/oop/goops.scm
@@ -72,7 +72,7 @@
method-specializers method-formals
primitive-generic-generic enable-primitive-generic!
method-procedure accessor-method-slot-definition
- slot-exists? make find-method get-keyword)
+ slot-exists? make find-method get-keyword type-of)
:no-backtrace)
(define *goops-module* (current-module))
@@ -1654,6 +1654,17 @@
(list2set (mapappend class-direct-methods
(cons c (class-subclasses c)))))
+(define (type-of x)
+ (cond
+ ((is-a? x <unknown>) '<undefined>)
+ ((null? x) '<object>)
+ ((is-a? x <boolean>) '<boolean>)
+ ((is-a? x <integer>) '<integer>)
+ ((is-a? x <string>) '<string>)
+ ((is-a? x <procedure>) '<function>)
+ ((is-a? x <object>) '<object>)
+ (else '<scm>)))
+
;;;
;;; {Final initialization}
;;;
--
1.7.0.4
