Macros

Macros are used to extend the Lisp language, they are basically a function which instead of returning its value, return a new form which will produce the macro call's value when evaluated.

When a function being compiled calls a macro the macro is expanded immediately and the resultant form is open-coded into the compiler's output.

• Defining Macros: Macros are defined like functions
• Macro Expansion: How macros are used by the evaluator
• Compiling Macros: The compiler expands macros at compile- time.

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