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C Language Facilities in the Library

Some of the facilities implemented by the C library really should be thought of as parts of the C language itself. These facilities ought to be documented in the C Language Manual, not in the library manual; but since we don't have the language manual yet, and documentation for these features has been written, we are publishing it here.

• Consistency Checking: Using assert to abort if something ``impossible'' happens.
• Variadic Functions: Defining functions with varying numbers of args.
• Null Pointer Constant: The macro NULL.
• Important Data Types: Data types for object sizes.
• Data Type Measurements: Parameters of data type representations.