我们正在从 GCC 7 中捕获关于 switch 语句中隐式失败的警告。以前,我们在 Clang 下清除了它们(这就是下面看到评论的原因): g++ -DNDEBUG -g2 -O3 -std=c++17 -Wall -Wextra -fPIC -c authenc.cpp asn.cpp: In member function ‘void EncodedObjectFilter::Put(
CPP17 allows to annotate switch case fall through using the [[fallthrough]] attribute instead of a raw comment. On newer compilers this cause redundant warnings when compiling with the -Wimplicit-fallthrough diagnostic flag. Example for unannotated switch case fall through at xxhash.h#L1869 👍...
Accidental fall throughs in a switch statement can lead to some nasty bugs. I have used the following banner for quite a long time to indicate that the fall through is intentional and not an oversite (this banner is also a part of the KMDF coding guidelines). It has definitely helped ...
A fallthrough statement may only be used in aswitchstatement, where the next statement to be executed is a statement with a case or default label for that switch statement. If the fallthrough statement is inside a loop, the next (labeled) statement must be part of the same iteration of ...
Initialization of variables is disallowed in any case that is not the last case (because the switch could jump over the initializer if there is a subsequent case defined, in which case the variable would be undefined, and accessing it would result in undefined behavior). Initialization is also...
A fallthrough declaration may only be used in aswitchstatement, where the next block item (statement, declaration, or label) to be encounted is a statement with acaseordefaultlabel for that switch statement. Indicates that the fall through from the previous case label is intentional and should...
A possible fix could be adding__attribute__((fallthrough));to the switch statements that it happens. This happens in two files: ~/solidity/libsolidity/codegen/CompilerUtils.cpp In line 784 add:__attribute__((fallthrough));, so this should look like: ...
switch (atoi(argv[1])) { case 0: printf(“Zero\n”); break; case 1: printf("One\n"); [[fallthrough]] case 2: printf("Two\n"); break; } } 0 Aug 27, 2020 5:47 PM Feedback BotUnder Investigation This issue is currently being investigated. Our team will get...
cl.exe /EHsc dataflow-agent.cpp[返回页首]创建消息记录代理以下示例展示了 log_agent 类,它类似于 dataflow_agent 类。 log_agent 类实现异步记录代理,用于将日志消息写入文件和控制台。 log_agent 类使应用程序能够将消息分类为信息性、警告或错误消息。 它还使应用程序能够指定每个日志类别是写入文件、控制台...
asn.cpp:361:3: note: here case BODY: ^~~~ GCC 手册声明使用__attribute__ ((fallthrough)),但它不可移植。该手册还指出“……也可以添加一条失败的评论来消除警告”,但它只提供FALLTHRU(这真的是唯一的选择吗?): switch (cond) { case 1: ...