Support std::array in Golang (#2045)

Support std::array in Golang

Closes #2045

Examples/test-suite/cpp11_std_array.i

@@ -1,6 +1,6 @@
 %module cpp11_std_array
 
-#if defined(SWIGPYTHON) || defined(SWIGRUBY) || defined(SWIGJAVA) || defined(SWIGCSHARP)
+#if defined(SWIGPYTHON) || defined(SWIGRUBY) || defined(SWIGJAVA) || defined(SWIGCSHARP) || defined(SWIGGO)
 
 %{
 #include <array>

Examples/test-suite/go/cpp11_std_array_runme.go

@@ -0,0 +1,68 @@
+package main
+
+import (
+  "fmt"
+  "swigtests/cpp11_std_array"
+)
+
+func CompareContainers(actual cpp11_std_array.ArrayInt6, expected [6]int) error {
+  if int(actual.Size()) != len(expected) {
+    return fmt.Errorf("Sizes are different: %d %d", actual.Size(), len(expected))
+  }
+  for i := 0; i < int(actual.Size()); i++ {
+    actualValue := actual.Get(i)
+    expectedValue := expected[i]
+    if actualValue != expectedValue {
+      return fmt.Errorf("Value is wrong for element %d. Expected %d got: %d", i, expectedValue, actualValue)
+    }
+  }
+  if actual.IsEmpty() {
+	  return fmt.Errorf("ai should not be empty")
+  }
+  return nil
+}
+
+func main() {
+  ai := cpp11_std_array.NewArrayInt6()
+  ps := [6]int{0, 0, 0, 0, 0, 0}
+  CompareContainers(ai, ps)
+
+  vals := [6]int{10, 20, 30, 40, 50, 60}
+  for i := 0; i < len(vals); i++ {
+    ai.Set(i, vals[i])
+  }
+  CompareContainers(ai, vals);
+
+  // Check return
+  vals = [6]int{-2, -1, 0, 0, 1, 2}
+  CompareContainers(cpp11_std_array.ArrayOutVal(), vals);
+  CompareContainers(cpp11_std_array.ArrayOutConstRef(), vals);
+  CompareContainers(cpp11_std_array.ArrayOutRef(), vals);
+  CompareContainers(cpp11_std_array.ArrayOutPtr(), vals);
+
+  // Check passing arguments
+  vals = [6]int{9, 8, 7, 6, 5, 4}
+  valsArrayInt6 := cpp11_std_array.NewArrayInt6()
+  for i := 0; i < len(vals); i++ {
+    valsArrayInt6.Set(i, vals[i])
+  }
+
+  ai = cpp11_std_array.ArrayInVal(valsArrayInt6);
+  CompareContainers(ai, vals);
+
+  ai = cpp11_std_array.ArrayInConstRef(valsArrayInt6);
+  CompareContainers(ai, vals);
+
+  ai = cpp11_std_array.NewArrayInt6(valsArrayInt6);
+  cpp11_std_array.ArrayInRef(ai);
+  CompareContainers(ai, vals);
+
+  ai = cpp11_std_array.NewArrayInt6(valsArrayInt6);
+  cpp11_std_array.ArrayInPtr(ai);
+  CompareContainers(ai, vals);
+
+  // Fill
+  ai.Fill(111)
+  vals = [6]int{111, 111, 111, 111, 111, 111}
+  CompareContainers(ai, vals);
+}

Lib/go/std_array.i

@@ -0,0 +1,43 @@
+/* -----------------------------------------------------------------------------
+ * std_array.i
+ * ----------------------------------------------------------------------------- */
+
+%include <std_common.i>
+
+namespace std {
+
+  template<class T, size_t N> class array {
+  public:
+    typedef size_t size_type;
+    typedef ptrdiff_t difference_type;
+    typedef T value_type;
+    typedef value_type* pointer;
+    typedef const value_type* const_pointer;
+    typedef value_type& reference;
+    typedef const value_type& const_reference;
+
+    array();
+    array(const array& other);
+
+    size_type size() const;
+    %rename(isEmpty) empty;
+    bool empty() const;
+    void fill(const T& u);
+    %extend {
+      const_reference get(int i) throw (std::out_of_range) {
+        int size = int(self->size());
+        if (i>=0 && i<size)
+          return (*self)[i];
+        else
+          throw std::out_of_range("array index out of range");
+      }
+      void set(int i, const value_type& val) throw (std::out_of_range) {
+        int size = int(self->size());
+        if (i>=0 && i<size)
+          (*self)[i] = val;
+        else
+          throw std::out_of_range("array index out of range");
+      }
+    }
+  };
+}