Function unwrap

crates/c-api/tests/types.cc:6–12

using namespace wasmtime;

template <typename T, typename E> T unwrap(Result<T, E> result) {
  if (result) {
    return result.ok();
  }
  std::cerr << "error: " << result.err().message() << "\n";
  std::abort();
}

TEST(ValType, Smoke) {
  EXPECT_EQ(ValType::i32(), ValType::i32());