HP C/iX Reference Manual (31506-90011)

Chapter 3 45
Data Types and Declarations
Type Names
Type Names
A type name is syntactically a declaration of an object or a function of a given type that
omits the identifier. Type names are often used in cast expressions and as operands of the
sizeof operator.
Syntax
type-name ::=
specifier-qualifier-list [abstract-declarator]
abstract-declarator ::=
pointer
[pointer] direct-abstract-declarator
direct-abstract-declarator
( abstract-declarator )
[direct-abstract-declarator] [ [constant-expression] ]
[direct-abstract-declarator] ( [parameter-type-list] )
Description
Type names are enclosed in parentheses to indicate a cast operation. The destination type
is the type named in the cast; the operand is then converted to that type.
A type name is a declaration without the identifier specified. For example, the declaration
for an integer is int i. If the identifier is omitted, only the integer type int remains.
Examples
int int
int * Pointer to int
int () Function returning an int
int *() Function returning a pointer to int
int (*)() Pointer to function returning an int
int [3]; Array of 3 int
int *[3]; Array of 3 pointers to int
int (*)[3]; Pointer to an array of 3 int
The parentheses are necessary to alter the binding order in the cases of pointer to function
and pointer to array. This is because function and array declarators have higher
precedence than the pointer declarator.