The reason for this problem is that the function signature ofnew()inHashSetdoes not include const, but a static variable must be initialized with aConstant Expression! Therefore, we need to make some modifications to define aHashSetglobal variable. 12345678910111213 pubstaticG_STR_SET:Mutex<Lazy<...
variable_mut(); } // 变量不可变 fn variable_mut(){ let mut i = 123; println!("{}",i); } 编译器警告: 7、静态变量 Rust 中通过 static 关键字声明静态变量,如下: static GLOBAL : i32 = 0; static 声明的变量的生命周期是整个程序,从启动到退出,static 变量的生命周期永远是 ‘static’,它占...
fnmain() { variable_mut(); } // 变量不可变 fnvariable_mut(){ letmuti=123; println!("{}",i); } 编译器警告: 回到顶部 7、静态变量 Rust 中通过 static 关键字声明静态变量,如下: static GLOBAL : i32 = 0; static 声明的变量的生命周期是整个程序,从启动到退出,static 变量的生命周期永远是 ...
fn main() { variable_mut(); } // 变量不可变 fn variable_mut(){ let mut i = 123; println!("{}",i); } 编译器警告: 7、静态变量 Rust 中通过 static 关键字声明静态变量,如下: static GLOBAL : i32 = 0; static 声明的变量的生命周期是整个程序,从启动到退出,static 变量的生命周期永远是...
fnmain(){variable_mut();}// 变量不可变fnvariable_mut(){letmut i=123;println!("{}",i);} 编译器警告: 7、静态变量 Rust 中通过 static 关键字声明静态变量,如下: static GLOBAL : i32 = 0; static 声明的变量的生命周期是整个程序,从启动到退出,static 变量的生命周期永远是 ‘static’,它占用的...
global 是一个常数表达式, 有点类似于 const eval, 具体哪些能算比较复杂. 简单起见我们暂时只存数据 let a: u32 = 42; let mut b: f32 = 3.14; 我们用这样一个结构存变量: WasmVariable pub struct WasmVariable { pub symbol: WasmSymbol, pub mutable: bool, pub export: bool, pub r#type: Was...
fn variable_mut(){ let mut i = 123; println!("{}",i); } 1. 2. 3. 4. 5. 6. 7. 8. 编译器警告: 7、静态变量 Rust 中通过 static 关键字声明静态变量,如下: static GLOBAL : i32 = 0; static 声明的变量的生命周期是整个程序,从启动到退出,static 变量的生命周期永远是 ‘static’,它占...
prof_accum:true<jemalloc>: malloc_conf #3("name"of the file referenced by the symbolic link named /etc/malloc.conf):""<jemalloc>: malloc_conf #4(value of the environment variable MALLOC_CONF):""<jemalloc>: malloc_conf #5(stringpointed to by theglobalvariable malloc_conf_2_conf_harder)...
static variable,// giving out a read-only borrow here is safe because it is guaranteed no more mutable// references will exist at this point or in the future.unsafe{STD_ONCE_COUNTER.as_ref().unwrap()}}pubfnmain(){println!("Global string is {}",*global_string().lock().unwrap());...
static GLOBAL_VARIABLE: Type = initial_value; GLOBAL_VARIABLE: The name of the global variable. Type: The data type of the variable. initial_value (optional): The initial value to assign to the variable. Let’s look at a simple example: static GLOBAL_COUNTER: i32 = 0; fn main() {...