PASCAL, Attributes
*Conan The Librarian (sorry for the slow response - running on an old VAX)
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VMS Help PASCAL, Attributes *Conan The Librarian (sorry for the slow response - running on an old VAX) |
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An attribute is an identifier that directs the Compaq Pascal
compiler to change its behavior in some way.
When an attribute is not explicitly stated, the compiler follows
the default rules to assign properties to program elements.
However, using attributes to override the defaults allows
additional control over the properties of data items, routines,
and compilation units.
Syntax of a Compaq Pascal attribute:
[ {identifier1 [[ ( { constant-expression |
identifier2 } ,...) ]] },... ]
The 'identifier1' is the name of the attribute.
The 'constant-expression' is a compile-time integer expression
that qualifies several of the Compaq Pascal attributes.
The 'identifier2' is the name of an option available in one of
the following cases:
o With the CHECK, OPTIMIZE, or KEY attributes
o With COMMON and PSECT attributes, indicating the name of a
storage area
o With the GLOBAL, EXTERNAL, WEAK_GLOBAL, and WEAK_EXTERNAL
attributes, indicating an external name
A list of attributes can appear anywhere in the VAR, TYPE, and
CONST declaration sections, and anywhere in a program that a
type, a type identifier, or the heading of a routine or
compilation unit is legal. However, only one attribute from a
particular class can appear in a given attribute list. The
names of attributes, when used in a suitable context, cannot
conflict with other identifiers with the same name in the
program.
Syntactically, an attribute list can appear before a VAR, TYPE,
and CONST section in the declaration section. In this case, the
attributes would apply to all elements in that particular
section. However, at this time, Compaq Pascal only allows you
to use the HIDDEN attribute in this way.
Some attributes require a special form of constant expression
called a name string. The syntax of a name string differs from
that of other strings in Compaq Pascal only in that a name
string cannot use the extended-string syntax.
See the "Compaq Pascal Language Reference Manual" for the
complete description of attributes.
Additional Information (explode) :
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