cpp: Add basic types with default constructor

include/evmc/evmc.hpp

@@ -14,6 +14,28 @@
 /// @ingroup cpp
 namespace evmc
 {
+/// The big-endian 160-bit hash suitable for keeping an Ethereum address.
+///
+/// This type wraps C ::evmc_address to make sure objects of this type are always initialized.
+struct address : evmc_address
+{
+    /// Default and converting constructor.
+    ///
+    /// Initializes bytes to zeros if not other @p init value provided.
+    constexpr address(evmc_address init = {}) noexcept : evmc_address{init} {}
+};
+
+/// The fixed size array of 32 bytes for storing 256-bit EVM values.
+///
+/// This type wraps C ::evmc_bytes32 to make sure objects of this type are always initialized.
+struct bytes32 : evmc_bytes32
+{
+    /// Default and converting constructor.
+    ///
+    /// Initializes bytes to zeros if not other @p init value provided.
+    constexpr bytes32(evmc_bytes32 init = {}) noexcept : evmc_bytes32{init} {}
+};
+
 /// @copydoc evmc_result
 ///
 /// This is a RAII wrapper for evmc_result and objects of this type

test/unittests/test_cpp.cpp

@@ -16,6 +16,37 @@
 
 #include <cstring>
 
+TEST(cpp, address)
+{
+    evmc::address a;
+    EXPECT_EQ(std::count(std::begin(a.bytes), std::end(a.bytes), 0), sizeof(a));
+
+    auto other = evmc_address{};
+    other.bytes[19] = 0xfe;
+    a = other;
+    EXPECT_TRUE(std::equal(std::begin(a.bytes), std::end(a.bytes), std::begin(other.bytes)));
+
+    a.bytes[0] = 1;
+    other = a;
+    EXPECT_TRUE(std::equal(std::begin(a.bytes), std::end(a.bytes), std::begin(other.bytes)));
+}
+
+TEST(cpp, bytes32)
+{
+    evmc::bytes32 b;
+    EXPECT_EQ(std::count(std::begin(b.bytes), std::end(b.bytes), 0), sizeof(b));
+
+    auto other = evmc_bytes32{};
+    other.bytes[31] = 0xfe;
+    b = other;
+    EXPECT_TRUE(std::equal(std::begin(b.bytes), std::end(b.bytes), std::begin(other.bytes)));
+
+    b.bytes[0] = 1;
+    other = b;
+    EXPECT_TRUE(std::equal(std::begin(b.bytes), std::end(b.bytes), std::begin(other.bytes)));
+}
+
+
 TEST(cpp, result)
 {
     static int release_called = 0;