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Declaration specifications

AN3350

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Doc ID 018512 Rev 2

Declaration specifications

Declaration specifications describe special properties to associate with a function or

variable at compile time. You insert these specifications in the object’s declaration.

●

Syntax for declaration specifications

●

__declspec(never_inline)

14.1

Syntax for declaration specifications

The syntax for a declaration specification is

__declspec(spec [ options ]) function-declaration;

where spec is the declaration specification, options represents possible arguments for the

declaration specification, and function-declaration represents the declaration of the function.

Unless otherwise specified in the declaration specification’s description, a function’s

definition does not require a declaration specification.

14.2

__declspec(never_inline)

Specifies that a function must not be inlined.

Syntax

__declspec (never_inline) function_prototype;

Remarks

Declaring a function’s prototype with this declaration specification tells the compiler not to

inline the function, even if the function is later defined with the inline, __inline__, or

__inline

keywords.

14.3

Syntax for attribute specifications

The syntax for an attribute specification is

__attribute__((list-of-attributes))

where list-of-attributes is a comma-separated list of zero or more attributes to associate with

the object. Place an attribute specification at the end of the delcaration and definition of a

function, function parameter, or variable. Example 70 shows an example.

Example 70 Example of an attribute specification

int f(int x __attribute__((unused))) __attribute__((never_inline));

int f(int x __attribute__((unused))) __attribute__((never_inline))

{

return 20;

}

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