从字符串变量执行C ++ [英] execute C++ from String variable

问题描述

在C ++中可以从字符串变量执行C ++代码。
Like in Javascript：

it is possible in C++ to execute the C++ code from string variable. Like in Javascript:

var theInstructions = "alert('Hello World'); var x = 100";

var F=new Function (theInstructions);

return(F());

我想要一个非常类似于C ++中的Javascript的东西。如何做？

I want something very similar like Javascript in C++. How to do that ?

推荐答案

您需要调用编译器来编译代码。此外，您将需要生成一些代码以将字符串包装在函数声明中。最后，你将不知何故需要加载编译的代码。

You will need to invoke a compiler to compile the code. In addition, you will need to generate some code to wrap the string in a function declaration. Finally, you'll then somehow need to load the compiled code.

如果我这样做（我不），我会：

If I were doing this (which I would not) I would:

1. 在代码周围连接标准封装函数头


2. 通过命令行调用编译器 system（））在Windows或库（ .dll > .so


3. 调用函数

1. Concatenate a standard wrapper function header around the code
2. Invoke a compiler via the command line (system()) to build a shared library (.dll on windows or .so on linux)
3. Load the shared library and map the function
4. Invoke the function

在大多数情况下，这不是你想要编写C代码的方式。

This is really not the way you want to write C code in most cases.

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