I'm unable to compile a small test contract and am hoping for guidance. I have a class called Account, in the following 2 files:
// --- account.hpp
#pragma once
#include <string>
#include <cmath>
#include <limits>
#include <numeric>
#include <eosio/eosio.hpp>
#include <eosio/system.hpp>
#include <eosio/asset.hpp>
#include <eosio/singleton.hpp>
#include <eosio/transaction.hpp>
namespace myapp {
using namespace eosio;
class Account {
private:
struct [[eosio::table]] _balances {
asset value;
uint64_t primary_key() const {
return value.symbol.code().raw();
}
};
typedef multi_index<name("balances"), _balances> EOST;
EOST t;
public:
class Balance {
public:
Balance(EOST t, symbol sym);
int64_t sat = 0;
double amt = 0;
};
Account(name code, name acct);
Balance bal(asset o);
Balance bal(symbol sym);
};
}
and
// --- account.cpp
#include "account.hpp"
namespace myapp {
using namespace eosio;
Account::Balance::Balance(EOST t, symbol sym) {
auto o = t.find(sym.code().raw());
if (o != t.end()) {
sat = o->value.amount;
amt = o->value.amount / pow(10, o->value.symbol.precision());
}
}
Account::Account(name code, name acct)
: t(code, acct.value) {
}
Account::Balance Account::bal(asset o) {
return bal(o.symbol);
}
Account::Balance Account::bal(symbol sym) {
return Balance(this->t, sym);
}
}
which I then use from my contract quite simply like this:
// --- token.cpp
#pragma once
#include <string>
#include <cmath>
#include <limits>
#include <numeric>
#include <eosio/eosio.hpp>
#include <eosio/system.hpp>
#include <eosio/asset.hpp>
#include <eosio/singleton.hpp>
#include <eosio/transaction.hpp>
#include "account.cpp"
namespace eosiosystem {
class system_contract;
}
namespace eosio {
class [[eosio::contract("token")]] token : public contract {
public:
[[eosio::action]] void ping() {
myapp::Account acct(_self, name("cust1"));
myapp::Account::Balance b = acct.bal(symbol("USD", 8));
print("\nbalance = ", b.sat, ", ", b.amt);
}
};
}
however, the code won't compile, citing the aforementioned error:
In file included from /Users/ekkis/dev/eos/account/token.cpp:3: In file included from /usr/local/Cellar/eosio.cdt/1.6.1/opt/eosio.cdt/bin/../include/libcxx/string:470: In file included from /usr/local/Cellar/eosio.cdt/1.6.1/opt/eosio.cdt/bin/../include/libcxx/string_view:169: In file included from /usr/local/Cellar/eosio.cdt/1.6.1/opt/eosio.cdt/bin/../include/libcxx/__string:56: In file included from /usr/local/Cellar/eosio.cdt/1.6.1/opt/eosio.cdt/bin/../include/libcxx/algorithm:643: /usr/local/Cellar/eosio.cdt/1.6.1/opt/eosio.cdt/bin/../include/libcxx/memory:1759:31: error: call to implicitly-deleted copy constructor of 'eosio::multi_index<4152997948076064768, myapp::Account::_balances>::item_ptr' ::new((void*)__p) _Up(_VSTD::forward<_Args>(__args)...); ^ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ /usr/local/Cellar/eosio.cdt/1.6.1/opt/eosio.cdt/bin/../include/libcxx/memory:1670:18: note: in instantiation of function template specialization 'std::__1::allocator::item_ptr>::construct::item_ptr, eosio::multi_index<4152997948076064768, myapp::Account::_balances>::item_ptr &>' requested here {__a.construct(__p, _VSTD::forward<_Args>(__args)...);} ^ /usr/local/Cellar/eosio.cdt/1.6.1/opt/eosio.cdt/bin/../include/libcxx/memory:1516:14: note: in instantiation of function template specialization 'std::__1::allocator_traits::item_ptr>
::__construct::item_ptr, eosio::multi_index<4152997948076064768, myapp::Account::_balances>::item_ptr &>' requested here {__construct(__has_construct(), ^ /usr/local/Cellar/eosio.cdt/1.6.1/opt/eosio.cdt/bin/../include/libcxx/memory:1600:17: note: in instantiation of function template specialization 'std::__1::allocator_traits::item_ptr> ::construct::item_ptr, eosio::multi_index<4152997948076064768, myapp::Account::_balances>::item_ptr &>' requested here construct(__a, _VSTD::__to_raw_pointer(__begin2), *__begin1); ^ /usr/local/Cellar/eosio.cdt/1.6.1/opt/eosio.cdt/bin/../include/libcxx/vector:1030:21: note: in instantiation of function template specialization 'std::__1::allocator_traits::item_ptr> ::__construct_range_forward::item_ptr *, eosio::multi_index<4152997948076064768, myapp::Account::_balances>::item_ptr *>' requested here __alloc_traits::__construct_range_forward(__a, __first, __last, this... ^ /usr/local/Cellar/eosio.cdt/1.6.1/opt/eosio.cdt/bin/../include/libcxx/vector:1213:9: note: in instantiation of function template specialization 'std::__1::vector::item_ptr, std::__1::allocator::item_ptr> ::__construct_at_end::item_ptr *>' requested here __construct_at_end(__x.__begin_, __x.__end_, __n); ^ /usr/local/Cellar/eosio.cdt/1.6.1/opt/eosio.cdt/bin/../include/eosiolib/contracts/eosio/multi_index.hpp:431:7: note: in instantiation of member function 'std::__1::vector::item_ptr, std::__1::allocator::item_ptr> >::vector' requested here class multi_index ^ /usr/local/Cellar/eosio.cdt/1.6.1/opt/eosio.cdt/bin/../include/eosiolib/contracts/eosio/multi_index.hpp:474:32: note: copy constructor of 'item_ptr' is implicitly deleted because field '_item' has a deleted copy constructor std::unique_ptr _item; ^ /usr/local/Cellar/eosio.cdt/1.6.1/opt/eosio.cdt/bin/../include/libcxx/memory:2388:3: note: copy constructor is implicitly deleted because 'unique_ptr::item, std::__1::default_delete::item> >' has a user-declared move constructor unique_ptr(unique_ptr&& __u) noexcept ^ Warning, empty ricardian clause file Warning, empty ricardian clause file Warning, action does not have a ricardian contract 1 error generated. Error while processing /Users/ekkis/dev/eos/account/token.cpp. abigen error
from which the error copy constructor of 'item_ptr' is implicitly deleted because field '_item' has a deleted copy constructor std::unique_ptr _item stands out. but I'm no brighter for it as to what the issue could be
help?
