EOS smart contract new compiler version 1.3.2 major change to syntax

Hello Steemit friends, so not long ago EOS introduced a new compiler called eosio.cdt version 1.3.2 which make a super drastic change to all the existing syntax, I would have to say at first I was extremely worried but later on I do find the new syntax is way cleaner and easier to code

Below is some area of changes

• no more account_name, replace with eosio::name
• no more N(variable), replace with "variable"_n
• EOSIO_ABI replace with EOSIO_DISPATCH
• S(4,SYS) replace with symbol("SYS", 4)
• Action:

  • Old Syntax

  [[eosio::action]]
          void myaction()
  

  • New Syntax

  ACTION myaction()
  

• Apply function that detect incoming transaction:
  • Old syntax

  #undef EOSIO_ABI
  
  #define EOSIO_ABI( TYPE, MEMBERS ) \
  extern "C" { \
     void apply( uint64_t receiver, uint64_t code, uint64_t action ) { \
        auto self = receiver; \
        TYPE thiscontract( self ); \
        if( action == N(onerror)) { \
           /* onerror is only valid if it is for the "eosio" code account and authorized by "eosio"'s "active permission */ \
           eosio_assert(code == N(eosio), "onerror action's are only valid from the \"eosio\" system account"); \
        } \
        if( code == self ) { \
           if (action != N(transfer)) {\
              switch( action ) { \
                  EOSIO_API( TYPE, MEMBERS ) \
              } \
              /* does not allow destructor of thiscontract to run: eosio_exit(0); */ \
           }\
        } \
        else if (code == N(eosio.token) && action == N(transfer) ) {\
            execute_action(&thiscontract, &dice::add);\
        }\
     } \
  }
  

  • New syntax

  extern "C" {
      void apply(uint64_t receiver, uint64_t code, uint64_t action) {
          if(code==receiver)
          {
              switch(action)
              {
                  EOSIO_DISPATCH_HELPER( dice, (add) )
              }
          }
          else if(code=="eosio.token"_n.value && action=="transfer"_n.value) {
              execute_action( name(receiver), name(code), &dice::add);
          }
      }
  };
  

• Table:

old syntax:

struct [[eosio::table]] mystruct3
      {
         uint64_t     key;
         uint64_t     secondid;
         std::string  name;
         account_name  account;
        std::string  memo1;
        std::string  memo2;
        std::string  memo3;
        std::string  memo4;
        asset quantity;

        mystruct3()
        : quantity(0, S(4, EOS))
        {}

         uint64_t primary_key() const { return key; } // getter for primary key
         uint64_t by_id() const {return secondid; } // getter for additional key

        EOSLIB_SERIALIZE(mystruct3,(key)(secondid)(name)(account)(memo1)(memo2)(memo3)(memo4)(quantity))



      };

        typedef eosio::multi_index<N(mystruct3), mystruct3> datastore;

New syntax:

TABLE mystruct3
      {
         uint64_t     key;
         uint64_t     secondid;
         std::string  name;
         eosio::name  account;
        std::string  memo1;
        std::string  memo2;
        std::string  memo3;
        std::string  memo4;
        eosio::asset quantity;

        

         uint64_t primary_key() const { return key; } // getter for primary key
         uint64_t by_id() const {return secondid; } // getter for additional key

      
      };

        typedef eosio::multi_index<"mystruct3"_n, mystruct3> datastore;

See how clean it is?

So yeah, I am glad the new syntax is way more cleaner and easier to code

thanks for reading <br /><center><hr/><em>Posted from my blog with <a href='https://wordpress.org/plugins/steempress/'>SteemPress</a> : http://fundurian.vornix.blog/2018/11/07/eos-smart-contract-new-compiler-version-1-3-2-major-change-to-syntax/ </em><hr/></center>