[r2004-05-04 23:13:55 by beppe] Empty log message

Original author: beppe
Date: 2004-05-04 23:13:55+00:00

web/tutorial/references.xml

@@ -19,17 +19,17 @@ test it on the <a href="cgi-bin/cduce">online interpreter</a>.
 <box title="Advanced programming" link="sel">
 
 <p>
-The fact that reference types are encoded rather than primitives have some advantaes. Noteworthy is the fact that our encoding allows the programmer to modify the default beahvior of the <code>get</code> and <code>set</code> functions can be modified. So a programmer can define a reference that whenever is read, records the access in a log file, or it performs some sanity checks before performing a writing. 
+The fact that reference types are encoded rather than primitive brings some advantages. Among these it is noteworthy that thanks to the encoding the default beahvior of the <code>get</code> and <code>set</code> functions can be modified. So a programmer can define a reference that whenever is read, records the access in a log file, or it performs some sanity checks before performing a writing. 
 </p>
 
 <p>
-For instance ... (write some code here of the form
+For instance the following template program, shows a way to define a reference to an integer that whenver is read performs some extra code, while whenever is written performs some checks and may raise an exception:
 </p>
 <sample><![CDATA[
 let x = 
    let hidden = ref Int 0 in
-     { get = %%some extra code%%; hidden.get ;
-       set = function (x:Int):[]
+     { get = (%%some extra code%%; hidden.get) ;
+       set = fun (x :Int):[] =
                if %%some condition%% 
                   then hidden.set(x)
                   else raise %%some exeption%%