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Command: typeof | Section: 3 | Source: NetBSD | File: typeof.3
TYPEOF(3) FreeBSD 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.
FreeBSD 14.1-RELEASE-p8 December 19, 2010 FreeBSD 14.1-RELEASE-p8