get function parameter like streamstring

i want get to function parameter like streamstring

// Declartion foo (std::stringstream strString);

// Using foo("Hello" << 开发者_开发知识库"world");

how to do that??

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The << syntax used for stream insertion is achieved by the various stream classes overloading the left-shift operator (that's what the << is). You can overload the left shift operator for your class:

struct Example
{
    Example& operator<<(int i) 
    {
        /* use i */ 
        return *this; 
    }
};

Example e;
e << 42; // calls operator<< overload

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You can do it with a macro - see this answer I want to trace logs using a Macro multi parameter always null. problem c++ windows