From 5c8dad4f5e16500e697d43964a67790b34dfd230 Mon Sep 17 00:00:00 2001
From: MITSUNARI Shigeo <herumi@nifty.com>
Date: Tue, 27 Nov 2018 15:52:19 +0900
Subject: [PATCH] add Array::operator= if exception is enable

---
 include/mcl/array.hpp | 25 +++++++++++++++++++++++--
 test/array_test.cpp   | 27 +++++++++++++++++++++++----
 2 files changed, 46 insertions(+), 6 deletions(-)

diff --git a/include/mcl/array.hpp b/include/mcl/array.hpp
index 84c5f37..a6d2a8f 100644
--- a/include/mcl/array.hpp
+++ b/include/mcl/array.hpp
@@ -8,6 +8,9 @@
 */
 #include <stdlib.h>
 #include <stddef.h>
+#ifndef CYBOZU_DONT_USE_EXCEPTION
+#include <new>
+#endif
 
 namespace mcl {
 
@@ -15,8 +18,6 @@ template<class T>
 class Array {
 	T *p_;
 	size_t n_;
-	Array(const Array&);
-	void operator=(const Array&);
 	template<class U>
 	void swap_(U& x, U& y) const
 	{
@@ -31,6 +32,26 @@ public:
 	{
 		free(p_);
 	}
+#ifndef CYBOZU_DONT_USE_EXCEPTION
+	Array(const Array& rhs)
+		: p_(0)
+		, n_(0)
+	{
+		if (rhs.n_ == 0) return;
+		p_ = (T*)malloc(sizeof(T) * rhs.n_);
+		if (p_ == 0) throw std::bad_alloc();
+		n_ = rhs.n_;
+		for (size_t i = 0; i < n_; i++) {
+			p_[i] = rhs.p_[i];
+		}
+	}
+	Array& operator=(const Array& rhs)
+	{
+		Array tmp(rhs);
+		tmp.swap(*this);
+		return *this;
+	}
+#endif
 	bool resize(size_t n)
 	{
 		if (n <= n_) {
diff --git a/test/array_test.cpp b/test/array_test.cpp
index d9b66c7..2168a28 100644
--- a/test/array_test.cpp
+++ b/test/array_test.cpp
@@ -1,14 +1,19 @@
 #include <mcl/array.hpp>
 #include <cybozu/test.hpp>
 
+template<class Array, size_t n>
+void setArray(Array& a, const int (&tbl)[n])
+{
+	CYBOZU_TEST_ASSERT(a.resize(n));
+	for (size_t i = 0; i < n; i++) a[i] = tbl[i];
+}
+
 template<class Array, size_t an, size_t bn>
 void swapTest(const int (&a)[an], const int (&b)[bn])
 {
 	Array s, t;
-	CYBOZU_TEST_ASSERT(s.resize(an));
-	CYBOZU_TEST_ASSERT(t.resize(bn));
-	for (size_t i = 0; i < an; i++) s[i] = a[i];
-	for (size_t i = 0; i < bn; i++) t[i] = b[i];
+	setArray(s, a);
+	setArray(t, b);
 	s.swap(t);
 	CYBOZU_TEST_EQUAL(s.size(), bn);
 	CYBOZU_TEST_EQUAL(t.size(), an);
@@ -83,3 +88,17 @@ CYBOZU_TEST_AUTO(FixedArray)
 	swapTest<mcl::FixedArray<int, n> >(aTbl, bTbl);
 	swapTest<mcl::FixedArray<int, n> >(bTbl, aTbl);
 }
+
+#ifndef CYBOZU_DONT_USE_EXCEPTION
+CYBOZU_TEST_AUTO(assign)
+{
+	const int aTbl[] = { 3, 4, 2 };
+	const int bTbl[] = { 3, 4, 2, 1, 5 };
+	mcl::Array<int> a, b;
+	setArray(a, aTbl);
+	setArray(b, bTbl);
+	a = b;
+	CYBOZU_TEST_EQUAL(a.size(), b.size());
+	CYBOZU_TEST_EQUAL_ARRAY(a.data(), b.data(), a.size());
+}
+#endif