const R8 = regexp.MustCompile(`^[a-zA-Z0-9_]*$`) funcmain(){ } 编译报错: ./checkconst.go:15:7:const initializer [5]int literal is not a constant ./checkconst.go:16:7:const initializermake([]int,5) is not a constant ./checkconst.go:17:7:const initializer regexp.MustCompile("...
But this is restricted to integer values and doesn't have advantages of #define, so it is not widely used. const is useful when you need to import a constant value from some library where it was compiled in. Or if it is used with pointers. Or if it is an array of constant values ...
test.c:12:3: error: initializer element is not a compile-time constantaudio_format_aac,^~~~1 error generated. While with GCC, it builds successfully. github-actionsbotadded thenew issuelabelMar 27, 2023 EugeneZelenkoaddedclang:frontendLanguage frontend issues, e.g. anything involving "Sema"and...
begin1.csh: begin1.csh: 0:441(28): error: initializer of const variable `worldSunColor' must be a constant expression 0:442(32): error: initializer of const variable `worldHorizonColor' must be a constant expression 0:443(29): error: initializer of const variable `worldMoonColor' must ...
The "Missing initializer in const declaration" error occurs when a variable is declared using const, but its value is not initialized on the same line. To solve the error, initialize the variable on the same line you declare it, e.g. const num = 30;. Here's an example of how the er...
let varData = 'variable';const constData = 'constant';varData = 1;constData = true // Uncaught TypeError: Assignment to constant variable.const声明时必须进行初始化（let可以不进行初始化赋值）。let varData;const constData; // Uncaught SyntaxError: Missing initializer in const declaration const声明的...
const a; // 报错SyntaxError: Missing initializer in const declaration const 的作用域与 let 命令相同:只在当前所在的块级作用域内有效。 代码语言:javascript 复制 if (true) { const b = 123; } b // 报错Uncaught ReferenceError: MAX is not defined 2、不存在变量提升、暂时性死区 const 命令声明的...
constexpr int f(std::initializer_list<std::initializer_list<int>>) { return 0; } constexpr int test = f({{1}, {1, 2}}); (Seehttps://godbolt.org/z/PSdp9x) Error log: <source>(7): error C2131: expression did not evaluate to a constant ...
const使用 声明一个常量 关键字const用来告诉编译器一个一旦被初始化过的变量就不能被修改 int a; ...
and is not a reference whose initialization is a constant initializer: [expr.const]/2 Aconstant initializerfor a variable or temporary objectois an initializer for which interpreting its full-expression as aconstant-expressionresults in a constant expression, except that ifois an object, such an ...