Question

How can I achieve a result like somebody would expect it according to the following code example:

// assuming: void myFunction( int* arr );

myFunction( [ 123, 456, 789 ] );

// as syntactical sugar for...

int values[] = { 123, 456, 789 };
myFunction( values );

The syntax I thought would work spit out a compile error.

• How can I define an argument array directly in the line where the function is called?

Answer 1

You can’t achieve that syntactic sugar with C++ code, not in C++03. The only place where braces are allowed, referring to elements of an array, is in initializing a named array:

int arr[] = { 0, 1, 2 };

Nowhere else. You can however achieve a similar effect with Boost.Assign:

void f(const std::vector<int>& v)
{
}

// ...
f(boost::assign::list_of(123)(456)(789));