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C Preprocessor

The following documentation sources cover the macro processor, the C Preprocessor.

• Overview of the C Preprocessor
• Transformations Made Globally
• Preprocessing Directives
• Header Files
• Uses of Header Files
• The #include Directive
• How #include Works
• Once-Only Include Files
• Inheritance and Header Files
• Macros
• Simple Macros
• Macros with Arguments
• Predefined Macros
• Standard Predefined Macros
• Nonstandard Predefined Macros
• Stringification
• Concatenation
• Undefining Macros
• Redefining Macros
• Pitfalls and Subtleties of Macros
• Improperly Nested Constructs
• Unintended Grouping of Arithmetic
• Swallowing the Semicolon
• Duplication of Side Effects
• Self-Referential Macros
• Separate Expansion of Macro Arguments
• Cascaded Use of Macros
• Newlines in Macro Arguments
• Conditionals
• Why Conditionals are Used
• Syntax of Conditionals
• The #if Directive
• The #else Directive
• The #elif Directive
• Keeping Deleted Code for Future Reference
• Conditionals and Macros
• Assertions
• The #error and #warning Directives
• Combining Source Files
• Miscellaneous Preprocessing Directives
• C Preprocessor Output
• Invoking the C Preprocessor
• Index