HP C/aC++ for PA-RISC Software manual Preprocessing Directives 119

4 Preprocessing Directives	119
Overview of the Preprocessor	119
Syntax	119
Usage Guidelines	119
Source File Inclusion (#include, #include_next)	120
Syntax	120
Description	120
Examples	121
Macro Replacement (#define, #undef)	121
Syntax	121
Description	121
Macros with Parameters	121
Specifying String Literals with the # Operator	122
Concatenating Tokens with the ## Operator	122
Example 1	122
Example 2	123
Using Macros to Define Constants	123
Other Macros	123
Example 1	124
Example 2	124
Using Constants and Inline Functions Instead of Macros	124
Example	124
Predefined Macros	125
Assertions (#assert, #unassert)	125
Syntax	125
Description	125
Conditional Compilation (#if, #ifdef, .. #endif)	126
Syntax	126
Description	126
Using the defined Operator	127
Using the #if Directive	127
The #endif Directive	127
Using the #ifdef and #ifndef Directives	127
Nesting Conditional Compilation Directives	127
Using the #else Directive	127
Using the #elif Directive	127
Examples	128
Line Control (#line)	128
Syntax	128
Description	128
Example	128
IOSTREAM Performance Improvement Pragma	129
Syntax:	129
Pragma Directive (#pragma) and _Pragma Operator	129
Syntax	129
Description	129
Example	129
Error Directive (#error)	130
Syntax	130
Example	130
Warning Directive	130
Syntax	130
Trigraph Sequences	130
Examples	130

10 Contents