identifying (with matchers) a message coming off the wire. • The role of Boolean algebra in composing matchers. • Understanding Boolean implication and using it to simplify matchers. This talk is a series compile time (given that storage is statically known). ## Part 2 Matching on fields in a message. ## Matchers To determine the correct message type for data arrived off the wire, we use a matcher. 1: template Value> 6: 7: // etc... ## Matchers are Boolean values We can treat a function that returns a bool just like a bool. (They're

*Context) : ClangTidyCheck(Name, Context) {} void registerMatchers(ast_matchers::MatchFinder *Finder) override; void check(const ast_matchers::MatchFinder::MatchResult &Result) override;};  : ClangTidyCheck(Name, Context) {} void registerMatchers(ast_matchers::MatchFinder *Finder) override; void check(const ast_matchers::MatchFinder::MatchResult &Result) override;};  : ClangTidyCheck(Name, Context) {} void registerMatchers(ast_matchers::MatchFinder *Finder) override; void check(const ast_matchers::MatchFinder::MatchResult &Result) override;}; ![Image](/up

Request/Response Matchers TODO: describe matchers class scrapy.contrib_exp.crawlspider.matchers.BaseMatcher TODO: describe base matcher class scrapy.contrib_exp.crawlspider.matchers.UrlMatcher TODO: url matcher class scrapy.contrib_exp.crawlspider.matchers.UrlRegexMatcher TODO: describe UrlListMatcher class scrapy.contrib_exp.crawlspider.matchers.UrlListMatcher TODO: describe url list matcher scrapy.contrib.webservice.spiders scrapy.contrib.webservice.stats scrapy.contrib exp.crawlspider.matchers scrapy.contrib exp.crawlspider.request scrapy.contrib exp.crawlspider.reqproc scrapy.contrib

Request/Response Matchers TODO: describe matchers class scrapy.contrib_exp.crawlspider.matchers.BaseMatcher TODO: describe base matcher class scrapy.contrib_exp.crawlspider.matchers.UrlMatcher TODO: url matcher class scrapy.contrib_exp.crawlspider.matchers.UrlRegexMatcher TODO: describe UrlListMatcher class scrapy.contrib_exp.crawlspider.matchers.UrlListMatcher TODO: describe url list matcher contrib.webservice.spiders,62 scrapy.contrib.webservice.stats,62 scrapy.contrib_exp.crawlspider.matchers, scrapy.contrib.exporter,128 scrapy.contrib_exp.crawlspider.request, scrapy.contrib.jsonlines

NO EXTERNAL DEPENDENCIES • MACRO-FREE (✓) • FEATURES (ASSERTIONS, SUITES, TESTS, SECTIONS, BDD, MATCHERS, LOGGING, ...) • (*) LIMITATIONS MAY APPLY ### UT - HTTPS://GITHUB.COM/BOOST-EXT/UT C++20 (GCC-9+ NO EXTERNAL DEPENDENCIES • MACRO-FREE (✓) • FEATURES (ASSERTIONS, SUITES, TESTS, SECTIONS, BDD, MATCHERS, LOGGING, ...) • (*) LIMITATIONS MAY APPLY • UT IS NOT AN OFFICIAL BOOST LIBRARY ### HELLO WORLD [2 == 1] expect(that % 1 == 2); -> assertions.cpp:1:FAILED [1 == 2] // Expect syntax // Matchers syntax ### ASSERTIONS - HTTPS://GODBOLT.ORG/Z/JAFK8W 1_i == 2; -> assertions.cpp:1:FAILED [1

Request/Response Matchers TODO: describe matchers class scrapy.contrib_exp.crawlspider.matchers.BaseMatcher TODO: describe base matcher class scrapy.contrib_exp.crawlspider.matchers.UrlMatcher TODO: url matcher class scrapy.contrib_exp.crawlspider.matchers.UrlRegexMatcher TODO: describe UrlListMatcher class scrapy.contrib_exp.crawlspider.matchers.UrlListMatcher TODO: describe url list matcher (class in scrapy.contrib.exporter), 150 BaseMatcher (class in scrapy.contrib_exp.crawlspider.matchers), 160 BaseSgmlLinkExtractor (class in scrapy.contrib.linkextractors.sgml), 37 BaseSgmlRequestExtractor

Request/Response Matchers TODO: describe matchers class scrapy.contrib_exp.crawlspider.matchers.BaseMatcher TODO: describe base matcher class scrapy.contrib_exp.crawlspider.matchers.UrlMatcher TODO: url matcher class scrapy.contrib_exp.crawlspider.matchers.UrlRegexMatcher TODO: describe UrlListMatcher class scrapy.contrib_exp.crawlspider.matchers.UrlListMatcher TODO: describe url list matcher Status JSON Scrapy.contrib.webservice.stats Stats JSON-RPC Scrapy.contrib exp.crawlspider.matchers Matchers Scrapy.contrib exp.crawlspider.request Request Extractors |scrapy.contrib exp.crawlspider

default routes: - matchers: - "alertname=Watchdog" repeat_interval: 2m receiver: watchdog - matchers: - "service=" routes: - matchers: - ffbf7f/p99_5.jpg) ## 注意 使用 matchers 键名称来指示警报要与节点匹配的匹配者。不要使用 match 或 match_re 键名称，它们都已弃用，并计划在以后的发行版本中删除。 另外，如果您定义了禁止规则，请使用 target_matchers 键名称来指示目标匹配者和 source_matchers 键名称来指示源匹配器。不要使用 target_match, receiver: default routes: - matchers: - "alertname=Watchdog" repeat_interval: 2m receiver: watchdog - matchers: - "service=example-app" routes: - matchers: - "severity=critical"

plug into the analysis on the preprocessor level using PPCallbacks or on the AST level using AST Matchers ## clang-tidy Checks are organized in modules, which can be linked into clang-tidy with minimal plug into the analysis on the preprocessor level using PPCallbacks or on the AST level using AST Matchers Checks can report issues in a similar way to how Clang diagnostics work. A fix-it hint can be attached

"timeout|cancel" | json | response_latency > 10s • Metric Queries • OpenTSDB Label matchers Line filters • 统计/计算 ## 协议层 • Parser · 手写 · 为什么？ • LogQL => Token => AST => SQL