Back to Basics Lambda Expressions Barbara Geller & Ansel Sermersheim CppCon September 2020Introduction ● Prologue ● History ● Function Pointer ● Function Object ● Definition of a Lambda Expression ● Capture Capture Clause ● Generalized Capture ● This ● Full Syntax as of C++20 ● What is the Big Deal ● Generic Lambda 2Prologue 3 ● Credentials ○ every library and application is open source ○ development using CsLibGuarded ■ library for managing access to data shared between threadsLambda Expressions ● History ○ lambda calculus is a branch of mathematics ■ introduced in the 1930’s to prove if “something” can be solved

enabled AWS EC2 �→ now uses IMDSv2 as the default information, see documentation. 2.2.1.7 Security • BR supports AWS IMDSv2 #16443 @pingyu When deploying TiDB on Amazon EC2, BR supports AWS Instance Metadata Service Version 2 (IMDSv2). You can configure example result is as follows: 154 export TIDB_HOST='{host}' # e.g. gateway01.ap-northeast-1.prod.aws. �→ tidbcloud.com export TIDB_PORT='4000' export TIDB_USER='{user}' # e.g. xxxxxx.root export TI

enabled AWS EC2 �→ now uses IMDSv2 as the default information, see documentation. 2.2.1.7 Security • BR supports AWS IMDSv2 #16443 @pingyu When deploying TiDB on Amazon EC2, BR supports AWS Instance Metadata Service Version 2 (IMDSv2). You can configure example result is as follows: 149 export TIDB_HOST='{host}' # e.g. gateway01.ap-northeast-1.prod.aws. �→ tidbcloud.com export TIDB_PORT='4000' export TIDB_USER='{user}' # e.g. xxxxxx.root export TI

example result is as follows: 127 export TIDB_HOST='{host}' # e.g. gateway01.ap-northeast-1.prod.aws. �→ tidbcloud.com export TIDB_PORT='4000' export TIDB_USER='{user}' # e.g. xxxxxx.root export TI The example result is as follows: export TIDB_HOST='{host}' # e.g. gateway01.ap-northeast-1.prod.aws. �→ tidbcloud.com export TIDB_PORT='4000' export TIDB_USER='{user}' # e.g. xxxxxx.root export TI The example result is as follows: export TIDB_HOST='{host}' # e.g. gateway01.ap-northeast-1.prod.aws. �→ tidbcloud.com export TIDB_PORT='4000' export TIDB_USER='{user}' # e.g. xxxxxx.root export TI

example result is as follows: 124 export TIDB_HOST='{host}' # e.g. gateway01.ap-northeast-1.prod.aws. �→ tidbcloud.com export TIDB_PORT='4000' export TIDB_USER='{user}' # e.g. xxxxxx.root export TI The example result is as follows: export TIDB_HOST='{host}' # e.g. gateway01.ap-northeast-1.prod.aws. �→ tidbcloud.com export TIDB_PORT='4000' export TIDB_USER='{user}' # e.g. xxxxxx.root export TI The example result is as follows: export TIDB_HOST='{host}' # e.g. gateway01.ap-northeast-1.prod.aws. �→ tidbcloud.com export TIDB_PORT='4000' export TIDB_USER='{user}' # e.g. xxxxxx.root export TI

example result is as follows: 124 export TIDB_HOST='{host}' # e.g. gateway01.ap-northeast-1.prod.aws. �→ tidbcloud.com export TIDB_PORT='4000' export TIDB_USER='{user}' # e.g. xxxxxx.root export TI The example result is as follows: export TIDB_HOST='{host}' # e.g. gateway01.ap-northeast-1.prod.aws. �→ tidbcloud.com export TIDB_PORT='4000' export TIDB_USER='{user}' # e.g. xxxxxx.root export TI The example result is as follows: export TIDB_HOST='{host}' # e.g. gateway01.ap-northeast-1.prod.aws. �→ tidbcloud.com export TIDB_PORT='4000' export TIDB_USER='{user}' # e.g. xxxxxx.root export TI

实例做备份 目前 AWS EC2 的默认元数据服务是 IMDSv2。TiDB �→ 支持从开启了 场景下，新的聚合方式能够更有效地识别来自某个特定系统的负载变化，提升问题诊断的效率。 更多信息，请参考用户文档。 2.2.1.7 安全 • BR 支持 AWS IMDSv2 #16443 @pingyu 在 Amazon EC2 上部署 TiDB 时，BR 支持 AWS 的 Instance Metadata Service Version 2 (IMDSv2)。你可以在 EC2 实例 上进行相关配置，使 BR 复制并粘贴对应连接字符串至 env.sh 中。需更改部分示例结果如下： export TIDB_HOST='{host}' # e.g. gateway01.ap-northeast-1.prod.aws.tidbcloud.com export TIDB_PORT='4000' export TIDB_USER='{user}' # e.g. xxxxxx.root export TIDB_

实例做备份 目前 AWS EC2 的默认元数据服务是 IMDSv2。TiDB �→ 支持从开启了 场景下，新的聚合方式能够更有效地识别来自某个特定系统的负载变化，提升问题诊断的效率。 更多信息，请参考用户文档。 2.2.1.7 安全 • BR 支持 AWS IMDSv2 #16443 @pingyu 在 Amazon EC2 上部署 TiDB 时，BR 支持 AWS 的 Instance Metadata Service Version 2 (IMDSv2)。你可以在 EC2 实例 上进行相关配置，使 BR 复制并粘贴对应连接字符串至 env.sh 中。需更改部分示例结果如下： export TIDB_HOST='{host}' # e.g. gateway01.ap-northeast-1.prod.aws.tidbcloud.com export TIDB_PORT='4000' export TIDB_USER='{user}' # e.g. xxxxxx.root export TIDB_

复制并粘贴对应连接字符串至 env.sh 中。需更改部分示例结果如下： export TIDB_HOST='{host}' # e.g. gateway01.ap-northeast-1.prod.aws.tidbcloud.com export TIDB_PORT='4000' export TIDB_USER='{user}' # e.g. xxxxxx.root export TIDB_ sh.example env.sh 6. 复制并粘贴对应连接字符串至 env.sh 中。需更改部分示例结果如下： export TIDB_HOST='{host}' # e.g. xxxxxx.aws.tidbcloud.com export TIDB_PORT='4000' export TIDB_USER='{user}' # e.g. xxxxxx.root export TIDB_ example env.sh 95 5. 复制并粘贴对应的连接字符串至 env.sh 中。需更改部分示例结果如下： export TIDB_HOST='{host}' # e.g. xxxxxx.aws.tidbcloud.com export TIDB_PORT='4000' export TIDB_USER='{user}' # e.g. xxxxxx.root export TIDB_