Secure access to EC2 (for developers) Agenda – introduction – EC2 in native environment – 3-tier architecture intro – alternative methods of resource connection: – Bastion host – SSM – EC2 Instance Connect DDoS attacks A regular virtual machineIt's a VM. Classic EC2 instance in de‐ fault setting. Resources: EC2SecurityGroup: Type: AWS:: EC2:: SecurityGroup Properties: GroupName: Launch-wizard-13 Launch-wizard-13 GroupDescription: Allow traffic to EC2 SecurityGroupIngress: - CidrIp: 0.0.0.0/0 IpProtocol: -1 SecurityGroupEgress: - CidrIp: 0.0.0.0/0

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std::spanstream  std::byteswap()  std::to_underlying()  Associative Containers Heterogeneous Erasure  Removed Features  Garbage Collection SupportC++23 Core Language6 Agenda  C++23 Core Language std::spanstream  std::byteswap()  std::to_underlying()  Associative Containers Heterogeneous Erasure  Removed Features  Garbage Collection Support7 Explicit Object Parameters  Instead of implicit std::spanstream  std::byteswap()  std::to_underlying()  Associative Containers Heterogeneous Erasure  Removed Features  Garbage Collection Support13 if consteval  Syntax: if consteval { /* A

to inject different functionality • Linking • Inheritance/virtual functions • Templates • Type erasure 29 Bloomberg Dependency Injection BasicsCall any thing satisfying a function signature – via yield; } private : CalculateYield YieldCalculator_; }; 31 Bloomberg Dependency Injection via type erasure Injection Dependency Type Testing Dependency captureTEST(Processor, test_yield) { auto y_calculator processor.process(rdata); EXPECT_EQ(yield.realised, 1); } 32 Bloomberg Dependency Injection via type erasure Injection Dependency Testing VerificationCall any function satisfying a function signature –

contains(id()); } };What about runtime polymorphism? • Programmers make the virtual tables • Zoo type-erasure already generates virtual tables • The handles have the accessor to the virtual table *INDEX* as articulate a new concept: A Value Manager 35Clear & Complete Value Management scenario • In Type Erasure: std::any, especially std::function: • The type of the managed value is “forgotten” at compilation manage a value you don’t know its type • There are different types of value managers (for type erasure): • Local: concerns such as buffer size and alignment • Non-local: • Allocation? • How to

h(skipped_extensions, extension)) { continue; } // ... } } 14Erasing Elements 15Container Erasure Strategies • Erasing unwanted elements before C++20: • vector-like: erase-remove idiom • list-like: Invalidating iterators while looping 🐞 • Skipping elements while looping 🐞 16Uniform Container Erasure • GH-236 and GH-566 implemented by SuperWig #include #include #include return false; } } // ... similarly for _Value > _Ty{_Rx_max} ... return true; } 39Associative Erasure • std::erase_if() is linear time • Inspects the entire value_type • Associative containers have