NAME
typeof —
GNU extension for type of an
expression
SYNOPSIS
type
typeof(expression);
DESCRIPTION
Thetypeof()
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
CAVEATS
The typeof() construct is a non-standard,
compiler-specific extension.