“case value is not a constant expression”错误的含义 “case value is not a constant expression”错误通常出现在使用C或C++等编程语言进行编程时,特别是在使用switch语句时。这个错误表明在switch语句的case标签中使用了非常量表达式。在C和C++中,switch语句的case标签必须是编译时常量,即在编译时就能确定其值的...
Exception(fmt::format(fmt, std::forward<Args>(args)...), code)error: ‘fmt’ is not a constant expression 40 | : Exception(fmt::format(fmt, std::forward<Args>(args)...), code) | ~~~^~~~ 简而言之就是format的str用fmt::runtime包装一下,让编译器不要把这个变量当做编译时常量。 fm...
Qt开发,从一个C#项目中搬过来一段代码,看上去很简单的逻辑,不过报错了: case value is not a constant expression 也就是switch case后面不支持变量,怎么解决呢?用常量当然可以,不过代码就变得不太友好了。 网上看到一条建议,很简单,不用switch case了,改用if else代替: if(unit==DT::UNIT_DEG){ if(gd>9...
plugin_use.dart 源代码: import 'package:flutter/material.dart'; import 'package:flutter_basics_mu_01/plugin_use.dart'; // void main() { // // runApp(const MyApp()); // runApp(PluginUse) // } void main() => runApp(PluginUse()); class MyApp extends StatelessWidget { const MyAp...
triggers error C7595: ‘std::source_location::current’: call to immediate function is not a constant expression, but new auto([] { return std::source_location::current(); }()); can compile.C++web View timeline by All Posts (4) Solutions & workarounds (0) h...
\.. \.. \example\example.cpp C:\Temp\spdlog\example\example.cpp(5): error C7595: 'a': call to immediate function is not a constant expression ninja: build stopped: subcommand failed. Build failed. Live at godbolt.ms This Bug makes it impossible to use the upcomming spdlog 2...
'std::_Basic_format_string<char,std::basic_string_view<char,std::char_traits>>::_Basic_format_string': call to immediate function is not a constant expression. This does not occur when using the string in other ways, such as replacing the std::format call with 'std::cout << message...
main.cpp:6:30: in 'constexpr' expansion of 'fmt::v8::basic_format_string<char, int&, int&>(f)' main.cpp:6:37: error: 'f' is not a constant expression 6 | const auto bar = fmt::format(f, args...); | ~~~^~~~ Why?Contributor vitaut commented ...
如果打开注释的那一块代码会报一个错误提醒Expression is not an integer constant expression GlogConfig.h中声明的pram(extern NSInteger const pram;)对外是一个全局不可变的一个变量. 我们在GlogConfig.m中对pram进行了初始值进行定义(const NSInteger pram = 0x11;),这里parm是一个局部常量不可变的. ...
<source>:6:18: error: non-type template argument is not a constant expression 6 | std::array<int, static_cast<std::size_t>(floating_constant)> a; | ^~~~ <source>:6:43: note: read of non-constexpr variable 'floating_constant' is not allowed in a constant expressi...