TYPEOF(3) BSD Library Functions Manual TYPEOF(3)
NAME
typeof -- GNU extension for type of an expression
SYNOPSIS
type
typeof(expression);
DESCRIPTION
The typeof() construct can be used to obtain the type of an expression. The syntax is comparable to that of sizeof(), but semantically
typeof() operates like a type name defined with typedef.
EXAMPLES
The following is a typical example of a type-generic macro:
#define MAX(a, b) ({
typeof(a) _a = (a);
typeof(b) _b = (b);
_a > _b ? _a : _b;
})
SEE ALSO
gcc(1), __alignof__(3), attribute(3), offsetof(3)
CAVEATS
The typeof() construct is a non-standard, compiler-specific extension.
BSD
December 19, 2010 BSD
