[poincare] Fix implemenation of AnySelector

Change-Id: I8b17cf9e06a22bdcb84787a03fb9011b08dc93c4

poincare/src/simplification/Makefile

@@ -15,6 +15,7 @@ products += $(rulesets)
 objs += $(addprefix $(prefix)/,\
   expression_simplify.o \
   rule.o \
+  selector/any_selector.o \
   selector/combination.o \
   selector/selector.o \
   selector/type_and_identifier_selector.o \

poincare/src/simplification/selector/any_selector.cpp

@@ -0,0 +1,18 @@
+#include "any_selector.h"
+#include "combination.h"
+
+namespace Poincare {
+namespace Simplification {
+
+bool AnySelector::acceptsLocationInCombination(const Combination * combination, int location) const {
+  // Yes, if no other slot in the combination before me is the same
+  for (int i=0; i<location; i++) {
+    if (combination->expressionIndexForSelectorIndex(i) == combination->expressionIndexForSelectorIndex(location)) {
+      return false;
+    }
+  }
+  return immediateMatch(combination->expressionForSelectorIndex(location));
+}
+
+}
+}

poincare/src/simplification/selector/any_selector.h

@@ -9,9 +9,7 @@ namespace Simplification {
 class AnySelector : public Selector {
 public:
   using Selector::Selector;
-  bool acceptsLocationInCombination(const Combination * combination, int location) const override {
-    return true;
-  }
+  bool acceptsLocationInCombination(const Combination * combination, int location) const override;
   bool immediateMatch(const Expression * e) const override {
     return true;
   }