Merge pull request #190 from AndrejMitrovic/FixOpEquals

Fix opEquals signature for structs

operatoroverloading.dd

@@ -327,10 +327,20 @@ class C {
 	form:)
 ---
 struct S {
-  int opEquals(ref const S s) { ... }
+  bool opEquals(ref const S s) { ... }  // for l-values (e.g. variables)
+  bool opEquals(const S s) { ... }      // for r-values (e.g. temporaries)
 }
 ---
 
+$(V2
+    $(P Alternatively you can declare a single opEquals function with an $(LINK2 template.html#auto-ref-parameters, auto ref) parameter:)
+---
+struct S {
+  bool opEquals(auto ref S s) { ... }  // for l-values and r-values
+}
+---
+)
+
 <h2><a name="compare">Overloading &lt; &lt;=, &gt; and &gt;=</a></h2>
 
 	$(P Comparison operations are rewritten as follows:)
@@ -712,7 +722,7 @@ a.$(I opfunc)()
 
 <h3>Examples</h3>
 
-	$(OL 
+	$(OL
 	$(LI
 -------
 class A { int $(B opNeg)(); }
@@ -847,7 +857,7 @@ a $(I op) b
 	the following sequence of rules is applied, in order, to determine
 	which form is used:
 
-	$(OL 
+	$(OL
 	$(LI The expression is rewritten as both:
 ---
 a.$(I opfunc)(b)
@@ -874,7 +884,7 @@ b.$(I opfunc)(a)
 
 <h4>Examples</h4>
 
-	$(OL 
+	$(OL
 	$(LI
 
 -------