[main --> 5.0.0-dev1] Merge main to release/5.0.0-dev1

libraries/eosiolib/contracts/eosio/contract.hpp

@@ -29,6 +29,12 @@ namespace eosio {
  */
 class contract {
    public:
+      enum class exec_type_t : uint8_t {
+         action,
+         call,
+         unknown
+      };
+
       /**
        * Construct a new contract given the contract name
        *
@@ -75,7 +81,27 @@ class contract {
        */
       inline const datastream<const char*>& get_datastream()const { return _ds; }
 
+      /**
+       * Whether this contract is for a sync call
+       *
+       * @return bool - Whether this contract is for a sync call
+       */
+      inline bool is_sync_call()const {
+         check(_exec_type != exec_type_t::unknown, "too early to call is_sync_call(). _exec_type has not been set yet");
+         return (_exec_type == exec_type_t::call);
+      }
+
+      /**
+       * Set the exectution type.
+       *
+       * @param type - The exectution type to be set.
+       */
+      inline void set_exec_type(exec_type_t type) {
+         _exec_type = type;
+      }
+
    protected:
+
       /**
        * The name of the account this contract is deployed on.
        */
@@ -90,5 +116,10 @@ class contract {
        * The datastream for this contract
        */
       datastream<const char*> _ds = datastream<const char*>(nullptr, 0);
+
+      /**
+       * The execution type: action or sync call
+       */
+      exec_type_t _exec_type = exec_type_t::unknown;
 };
 }

libraries/eosiolib/contracts/eosio/detail.hpp

@@ -46,6 +46,11 @@ namespace eosio { namespace detail {
    template <typename T>
    struct is_same<T,bool> { static constexpr bool value = std::is_integral<T>::value; };
 
+   // Full specialization to resolve ambiguity introduced by partial specializations
+   // of is_same<bool,U> and is_same<T,bool>
+   template <>
+   struct is_same<bool, bool> { static constexpr bool value = true; };
+
    template <size_t N, size_t I, auto Arg, auto... Args>
    struct get_nth_impl { static constexpr auto value  = get_nth_impl<N,I+1,Args...>::value; };
 

tests/integration/call_tests.cpp

@@ -140,12 +140,11 @@ BOOST_AUTO_TEST_CASE(mixed_action_call_tags_test) { try {
    BOOST_REQUIRE_NO_THROW(t.push_action("caller"_n, "hstmulprmtst"_n, "caller"_n, {}));
 
    // Make sure we can push an action using `sum`.
-   //BOOST_REQUIRE_NO_THROW(t.push_action("callee"_n, "sum"_n, "callee"_n,
-   t.push_action("callee"_n, "sum"_n, "callee"_n,
+   BOOST_REQUIRE_NO_THROW(t.push_action("callee"_n, "sum"_n, "callee"_n,
                                         mvo()
                                              ("a", 1)
                                              ("b", 2)
-                                             ("c", 3)); //);
+                                             ("c", 3)));
 } FC_LOG_AND_RETHROW() }
 
 // Verify the receiver contract with only one sync call function works
@@ -234,4 +233,29 @@ BOOST_AUTO_TEST_CASE(addr_book_tests) { try {
    BOOST_REQUIRE_NO_THROW(t.push_action("caller"_n, "get"_n, "caller"_n, mvo() ("user", "alice")));
 } FC_LOG_AND_RETHROW() }
 
+// For a function tagged as both `action` and `call`, verify is_sync_call()
+// returns true if tagged as `call` and false if tagged as `action`.
+BOOST_AUTO_TEST_CASE(is_sync_call_test) { try {
+   call_tester t({
+      {"caller"_n, contracts::caller_wasm(), contracts::caller_abi().data()},
+      {"callee"_n, contracts::callee_wasm(), contracts::callee_abi().data()}
+   });
+
+   // issynccall() is tagged as both `action` and `call`, and returns
+   // is_sync_call(). makesynccall() calls issynccall() as a sync call
+   // and returns its result. So the current action return value must be
+   // true.
+   auto  trx_trace    = t.push_action("caller"_n, "makesynccall"_n, "caller"_n, {});
+   auto& action_trace = trx_trace->action_traces[0];
+   bool return_value = fc::raw::unpack<bool>(action_trace.return_value);
+   BOOST_REQUIRE(return_value == true);
+
+   // Call issynccall() directly as an action. Since issynccall()
+   // returns is_sync_call(), the current action return value must be false.
+   trx_trace           = t.push_action("callee"_n, "issynccall"_n, "callee"_n, {});
+   auto& action_trace1 = trx_trace->action_traces[0];
+   return_value = fc::raw::unpack<bool>(action_trace1.return_value);
+   BOOST_REQUIRE(return_value == false);
+} FC_LOG_AND_RETHROW() }
+
 BOOST_AUTO_TEST_SUITE_END()

tests/toolchain/build-pass/separate_cpp_hpp.hpp

@@ -1,6 +1,6 @@
 #include <eosio/eosio.hpp>
 
-class [[eosio::contract]] separate_cpp_hpp : eosio::contract {
+class [[eosio::contract]] separate_cpp_hpp : public eosio::contract {
 public:
    using contract::contract;
 

tests/unit/test_contracts/sync_call_callee.cpp

@@ -31,3 +31,6 @@ struct1_t sync_call_callee::pass_multi_structs(struct1_t s1, int32_t m, struct2_
    return { .a = s1.a * m + s2.c, .b = s1.b * m + s2.d };
 }
 
+bool sync_call_callee::issynccall() {
+   return is_sync_call();
+}

tests/unit/test_contracts/sync_call_callee.hpp

@@ -38,6 +38,11 @@ class [[eosio::contract]] sync_call_callee : public eosio::contract{
    [[eosio::call]]
    struct1_t pass_multi_structs(struct1_t s1, int32_t m, struct2_t s2);
 
+   // return is_sync_call()
+   [[eosio::action, eosio::call]]
+   bool issynccall();
+   using issynccall_func = eosio::call_wrapper<"issynccall"_i, &sync_call_callee::issynccall>;
+
    using return_ten_func = eosio::call_wrapper<"return_ten"_i, &sync_call_callee::return_ten>;
    using echo_input_func = eosio::call_wrapper<"echo_input"_i, &sync_call_callee::echo_input>;
    using void_func_func = eosio::call_wrapper<"void_func"_i, &sync_call_callee::void_func>;

tests/unit/test_contracts/sync_call_caller.cpp

@@ -172,4 +172,11 @@ class [[eosio::contract]] sync_call_caller : public eosio::contract{
       status = eosio::call("callee"_n, 0, bad_version_data.data(), bad_version_data.size());
       eosio::check(status == -10000, "call did not return -10000 for invalid version");
    }
+
+   // Call issynccall as a sync call and return its return value
+   [[eosio::action]]
+   bool makesynccall() {
+      sync_call_callee::issynccall_func is_sync_call_func{ "callee"_n };
+      return is_sync_call_func();
+   }
 };

tools/include/eosio/codegen.hpp

@@ -146,11 +146,28 @@ namespace eosio { namespace cdt {
             return "";
          }
 
+         // Return `true` if the method `decl`'s base class if `eosio::contract`
+         bool base_is_eosio_contract_class(const clang::CXXMethodDecl* decl) {
+            auto cxx_decl = decl->getParent();
+            // on this point it could be just an attribute so let's check base classes
+            for (const auto& base : cxx_decl->bases()) {
+               if (const clang::Type *base_type = base.getType().getTypePtrOrNull()) {
+                  if (const auto* cur_cxx_decl = base_type->getAsCXXRecordDecl()) {
+                     if (cur_cxx_decl->getQualifiedNameAsString() == "eosio::contract") {
+                        return true;;
+                     }
+                  }
+               }
+            }
+            return false;
+         }
+
          template <typename F>
          void create_dispatch(const std::string& attr, const std::string& func_name, F&& get_str, CXXMethodDecl* decl) {
             constexpr static uint32_t max_stack_size = 512;
             codegen& cg = codegen::get();
             std::string nm = decl->getNameAsString()+"_"+decl->getParent()->getNameAsString();
+
             if (cg.is_eosio_contract(decl, cg.contract_name)) {
                ss << "\n\n#include <eosio/datastream.hpp>\n";
                ss << "#include <eosio/name.hpp>\n";
@@ -190,8 +207,22 @@ namespace eosio { namespace cdt {
                   ss << tn << " arg" << i << "; ds >> arg" << i << ";\n";
                   i++;
                }
+
+               // Create contract object
+               ss << decl->getParent()->getQualifiedNameAsString()
+                  << " obj {eosio::name{r},eosio::name{c},ds};\n";
+
+               // Call `set_exec_type()` only for contracts dervied from `eosio::contract`.
+               // A contract class can have only `eosio::contract` attribute
+               // but does not inherit from the `eosio::contract` class;
+               // it may not have `set_exec_type()`. We need to make sure the class derives
+               // from `eosio::contract` before calling set_exec_type().
+               if (base_is_eosio_contract_class(decl)) {
+                  ss << "obj.set_exec_type(eosio::contract::exec_type_t::action);\n";
+               }
+
                const auto& call_action = [&]() {
-                  ss << decl->getParent()->getQualifiedNameAsString() << "{eosio::name{r},eosio::name{c},ds}." << decl->getNameAsString() << "(";
+                  ss << "obj." << decl->getNameAsString() << "(";
                   for (int i=0; i < decl->parameters().size(); i++) {
                      ss << "arg" << i;
                      if (i < decl->parameters().size()-1)
@@ -260,8 +291,22 @@ namespace eosio { namespace cdt {
                   ss << tn << " arg" << i << "; ds >> arg" << i << ";\n";
                   i++;
                }
+
+               // Create contract object
+               ss << decl->getParent()->getQualifiedNameAsString()
+                  << " obj {eosio::name{receiver},eosio::name{receiver},ds};\n";
+
+               // Call `set_exec_type()` only for contracts dervied from `eosio::contract`.
+               // A contract class can have only `eosio::contract` attribute
+               // but does not inherit from the `eosio::contract` class;
+               // it may not have `set_exec_type()`. We need to make sure the class derives
+               // from `eosio::contract` before calling set_exec_type().
+               if (base_is_eosio_contract_class(decl)) {
+                  ss << "obj.set_exec_type(eosio::contract::exec_type_t::call);\n";
+               }
+
                const auto& call_function = [&]() {
-                  ss << decl->getParent()->getQualifiedNameAsString() << "{eosio::name{receiver},eosio::name{receiver},ds}." << decl->getNameAsString() << "(";
+                  ss << "obj." << decl->getNameAsString() << "(";
                   for (int i=0; i < decl->parameters().size(); i++) {
                      ss << "arg" << i;
                      if (i < decl->parameters().size()-1)