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.