Added Documentation

MathPad/MPSuffixFunction.h

@@ -8,11 +8,37 @@
 
 #import "MPFunction.h"
 
+
+
 @class MPSuffixFunction;
 @protocol MPValue;
 
+
+/*!
+    @class      MPSuffixFunction
+    @brief      This is the common superclass for all functions that apply to the
+                value preceeding them.
+ 
+    @discussion One example for a suffix function is a power. Powers apply to a
+                base value and are evaluated with very high priority. In fact the
+                base value may not be used without previously having evaluated
+                the suffix function.
+ 
+                Another special thing about suffix functions is that they need to
+                know more than their own children (namely the base value) to be
+                evaluated. To be able to do this suffix functions have a special
+                property @c baseValue that is set before the function is
+                evaluated.
+ */
 @interface MPSuffixFunction : MPFunction
 
+/*!
+    @property   baseValue
+    @brief      The receiver's base value.
+ 
+    @discussion The base value is the thing a suffix function applies to (e.g.
+                a power's base).
+ */
 @property (nonatomic, strong) id<MPValue> baseValue;
 
 @end