New features - novas funcionalidades

1. Algumas
Novidades da
Versão 0.6.x
Jeff Prestes - 2020-03-30

2. Agradecimentos e Creditos
Apresentação baseada no material do prof. Gerard Persoon da Universidade de
Ciências Aplicadas de Haia
Agradeço do prof. Gerard por gentilmente compartilhar o material.
Mais detalhes dos fontes originais de exemplo em:
https://github.com/web3examples/ethereum/blob/master/solidity_examples/
Meus exemplos melhorados estão em:
https://github.com/jeffprestes/ethereum-examples-hague-univ/solidity_examples
Jeff Prestes https://linkedin.com/in/jeffprestes https://github.com/jeffprestes

3. Tipos Globais
https://github.com/web3examples/ethereum/blob/master/solidity_examples/sol6_globaltypes.sol
Jeff Prestes https://linkedin.com/in/jeffprestes https://github.com/jeffprestes

4. Funções Fallback & Receive
https://github.com/jeffprestes/ethereum-examples-hague-univ/blob/master/solidity_examples/sol6_fall
backreceive.sol
Jeff Prestes https://linkedin.com/in/jeffprestes https://github.com/jeffprestes

5. Nova forma de excluir item de array
https://github.com/web3examples/ethereum/blob/master/solidity_examples/sol6_mapping.sol
Usar ListParticipant.pop() ao invés de ListParticipant.length--
Jeff Prestes https://linkedin.com/in/jeffprestes https://github.com/jeffprestes

6. push
Não retorna mais o índice do novo elemento. Aliás, push(novoValor) retorna nada.
https://solidity.readthedocs.io/en/v0.6.0/types.html#array-members
Jeff Prestes https://linkedin.com/in/jeffprestes https://github.com/jeffprestes

7. ABIEncoderV2
Não é mais considerado experimental, só mantiveram a sintaxe por
retrocompatibilidade: https://solidity.readthedocs.io/en/v0.6.4/layout-of-source-files.html#abiencoderv2
Não usar com o otimizador:
https://solidity.readthedocs.io/en/v0.6.4/060-breaking-changes.html#yul-optimizer
Jeff Prestes https://linkedin.com/in/jeffprestes https://github.com/jeffprestes

8. Novas features em herança: virtual e override
https://github.com/web3examples/ethereum/blob/master/solidity_examples/sol6_override.sol
Este artigo explica em detalhes:
https://forum.openzeppelin.com/t/how-we-plan-to-adopt-solidity-0-6-virtual-functions/2063
Aqui outros exemplos: https://solidity.readthedocs.io/en/v0.6.0/contracts.html#inheritance
Jeff Prestes https://linkedin.com/in/jeffprestes https://github.com/jeffprestes

9. Multiplas sobrecargas de método
https://github.com/web3examples/ethereum/blob/master/solidity_examples/sol6_overridemultiple.sol
Jeff Prestes https://linkedin.com/in/jeffprestes https://github.com/jeffprestes

10. Métodos Abstratos
https://github.com/web3examples/ethereum/blob/master/solidity_examples/sol6_abstract.sol
Jeff Prestes https://linkedin.com/in/jeffprestes https://github.com/jeffprestes

11. Melhoria no compilador: alerta de "shadowing"
https://github.com/web3examples/ethereum/blob/master/solidity_examples/sol6_shadowing.sol
Jeff Prestes https://linkedin.com/in/jeffprestes https://github.com/jeffprestes

12. Polêmico: try catch
https://github.com/web3examples/ethereum/blob/master/solidity_examples/sol6_trycatch.sol
Jeff Prestes https://linkedin.com/in/jeffprestes https://github.com/jeffprestes

13. Casting de address para address payable
https://github.com/jeffprestes/ethereum-examples-hague-univ/blob/master/solidity_examples/sol6_addr
payablecasting.sol
Jeff Prestes https://linkedin.com/in/jeffprestes https://github.com/jeffprestes

14. Fatias de um array ou Array Slices
https://github.com/web3examples/ethereum/blob/master/solidity_examples/sol6_slice.sol
Jeff Prestes https://linkedin.com/in/jeffprestes https://github.com/jeffprestes

15. Natspec - Pequena melhoria na doc gerada no retorno
https://github.com/jeffprestes/ethereum-examples-hague-univ/blob/master/solidity_examples/sol6_nats
pec.sol
Jeff Prestes https://linkedin.com/in/jeffprestes https://github.com/jeffprestes

16. Mudança de como obter Endereços de funções externas
https://github.com/jeffprestes/ethereum-examples-hague-univ/blob/master/solidity_examples/sol6_addr
essexternal.sol
Jeff Prestes https://linkedin.com/in/jeffprestes https://github.com/jeffprestes

17. That's all folks!
https://linkedin.com/in/jeffprestes
Mande PR ou dê uma estrela no repo dos exemplos
https://github.com/jeffprestes
E adicione-me no seu Linkedin