An inline definition of a function with external linkage shall not contain a definition of a modifiable object with static or thread storage duration, and shall not contain a reference to an identifier with internal linkage 这是因为inline definition需要和external definition互相可替换。现在假设有一个来...
If all of the file scope declarations for a function in a translation unitinclude theinlinefunction specifier without extern, then thedefinition in that translation unit is aninlinedefinition. Aninlinedefinitiondoes not provide an external definition for the function, and does not forbidan external de...
If all of the file scope declarations for a function in a translation unit include the inline function specifier without extern, then the definition in that translation unit is an inline definition. An inline definition does not provide an external definition for the function, and does not forbid...
C++ Копирај // inline_keyword1.cpp // compile with: /c inline int max(int a, int b) { return a < b ? b : a; } A class's member functions can be declared inline, either by using the inline keyword or by placing the function definition within the class definition....
The inline keyword is a function specifier that tells the compiler to substitute the code within the function definition for every instance of a function call.RemarksInline code substitution occurs only at the compiler's discretion. For example, the compiler won't inline a function if its address...
Likewise, the function has a single address, regardless of the number of inline definitions that occur in addition to the external definition. Summary: what most users of C and C++ expect from inline is not what they get. Its apparent primary purpose, to avoid functional call overhead, is ...
5. By marking it as inline, you can put a function definition in a header file (i.e. it can be included in multiple compilation unit, without the linker complaining) 优点: - 1.它通过避免函数调用开销来加速你的程序。 2.当函数调用发生时,它可以节省堆栈上变量push / pop的开销。
gcc 默认是 C 语言编译器，g++ 默认是 C++ 编译器；inline关键字的语义在 C 和 C++ 中有很大的差别...
应用于函数原型的extern关键字绝对没有任何内容(应用于函数定义的 extern 关键字当然是非语义的)。 函数原型始终是一个声明,而不是一个定义。 此外,在标准 C 中,函数始终是外部的,但某些编译器扩展允许在函数内定义函数。 File 1: // Explicit definition, this actually allocates// as well as describingint...
定义前不加inline ，如果头文件被多个translation unit（cpp文件）引用，ODR会报错multipledefinition。