C++: Support zero literal (0x0_address)

ethereum · Feb 13, 2023 · 25431fb · 25431fb
1 parent 97fac6f
commit 25431fb
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Showing 2 changed files with 8 additions and 1 deletion.
diff --git a/include/evmc/evmc.hpp b/include/evmc/evmc.hpp
@@ -289,7 +289,8 @@ namespace literals
 template <typename T>
 constexpr T parse(std::string_view s) noexcept
 {
-    return from_hex<T>(s).value();
+    auto const v = from_hex<T>(s);
+    return v.has_value() ? v.value() : T{};
 }
 
 /// Literal for evmc::address.

diff --git a/test/unittests/cpp_test.cpp b/test/unittests/cpp_test.cpp
@@ -149,6 +149,12 @@ TEST(cpp, std_hash)
     std::fill_n(eb.bytes, sizeof(eb), uint8_t{0xee});
     EXPECT_EQ(std::hash<evmc::bytes32>{}(eb), static_cast<size_t>(0xbb14e5c56b477375));
 
+    const auto zero_address = 0x0_address;
+    EXPECT_EQ(zero_address, evmc::address{});
+
+    const auto zero_bytes32 = 0x0_bytes32;
+    EXPECT_EQ(zero_bytes32, evmc::bytes32{});
+
     const auto rand_address_1 = 0xaa00bb00cc00dd00ee00ff001100220033004400_address;
     EXPECT_EQ(std::hash<evmc::address>{}(rand_address_1), static_cast<size_t>(0x30022347e325524e));