Unusual typedef use in C++

Question

I came across a new use of the keyword typedef in C++.

What does this typedef statement mean ?

int typedef foo; 

Answer 1

It's the same as

typedef int foo; 

i.e. it defines foo to be the type int. While the grammar allows to swap typedef and int in this case, you usually would not do this because it impairs readability.

Answer 2

typedef is a decl-specifier, so it has the same syntax rules as const or static. It can be moved about like that and will mean the same thing.