Duplicate const qualifier allowed in C but not in C++?

Question

Sample code snippet

const const const int x = 10;   
int main()
{}

gets compiled in C but not in C++. Why does it get compiled in C? I thou

Answer 1

From the last C++0x draft, [dcl.type]:

As a general rule, at most one type-specifier is allowed in the complete decl-specifier-seq of a declaration or in a type-specifier-seq or trailing-type-specifier-seq. The only exceptions to this rule are the following:

— const can be combined with any type specifier except itself.

— volatile can be combined with any type specifier except itself.

— signed or unsigned can be combined with char, long, short, or int.

— short or long can be combined with int.

— long can be combined with double.

— long can be combined with long.