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Language Extensions
3.5 Standard C++ language extensions
The compiler supports numerous extensions to the ISO C++ standard, for example,
qualified names in the declaration of class members.
These extensions are available if the source language is C++ and you are compiling in
non strict mode.
These extensions are not available if the source language is C++ and the compiler is
restricted to compiling strict Standard C++ using the --strict compiler option.
3.5.1 operator
A operator whose second and third operands are string literals or wide string literals
can be implicitly converted to char * or wchar_t *. In C++ string literals are const. There
is an implicit conversion that enables conversion of a string literal to char * or wchar_t
*, dropping the const. That conversion, however, applies only to simple string literals.
Permitting it for the result of a operation is an extension.
Example
char *p = x "abc" : "def";
3.5.2 Declaration of a class member
A qualified name can be used in the declaration of a class member.
Errors
A warning is issued if a qualified name is used in the declaration of a class member.
Example
struct A
{
int A::f(); // is the same as int f();
};
3.5.3 friend
A friend declaration for a class can omit the class keyword.
Access checks are not carried out on friend declarations by default. Use the --strict
command-line option to force access checking.
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