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Understanding the C Preprocessor

Contents

• Introduction
• #include
• #define
• • Standard Macros, System Macros and Reserved Names
  • Line Extension
  • Varadic Macro Arguments
  • Converting Macro Arguments to Literal Strings
  • Concatenating Macro Tokens
  • Common Problems with Macros
• #undef
• Conditional Compilation
• #error
• #line
• #pragma
• References
• Document History
• Contributors

References

• The C89 Draft, section 3.8: Preprocessing Directives
• The C Preprocessor for GCC
• C++ Reference: Preprocessor Directives
• C++ Tutorial, Section 5.5: Preprocessor Directives
• An Introduction to Preprocessor Metaprogramming, Section A2: Fundamental Abstractions of the Preprocessor
• The C Preprocessor

Document History

• 2.0.0 (2006:05:19) - Further (long overdue) corrections; added ToC; added discussion of standard macros, token manipulation; new references and contributors
• 1.0.1 (2005:04:12) - Corrections based on initial feedback; HTML re-formatted and cleaned up; added version numbers, Document History, Contributors
• 1.0.0 (2005:04:10) - original version

Contributors

• Scorpions4Ever
• Mitakeet
• The Dark
• Grumpy
• Solar
• Dave Sinkula

(Names given are taken from the usernames used on the DevShed and Mega-Tokyo Programming Forums)