Question

Straight into business: I have code looking roughly like this:

char* assemble(int param)
{
    char* result = "Foo" << doSomething(param) << "bar";
    return result;
}

Now what I get is:

error: invalid operands of types ‘const char [4]’ and ‘char*’ to binary ‘operator<<’

Edit:
doSomething returns a char*.

So, how do I concatenate these two?

Additional info:
Compiler: g++ 4.4.5 on GNU/Linux 2.6.32-5-amd64

Answer 1

"Foo" and "Bar" are literals, they don’t have the insertion (<<) operator.

you instead need to use std::string if you want to do basic concatenation:

std::string assemble(int param)
{
    std::string s = "Foo";
    s += doSomething(param); //assumes doSomething returns char* or std::string
    s += "bar";
    return s;
}