CLHS: Section 5.1.2.7

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## 5.1.2.7 Macro Forms as Places

A macro form can be used as a place, in which case Common Lisp expands the macro form as if by macroexpand-1 and then uses the macro expansion in place of the original place. Such macro expansion is attempted only after exhausting all other possibilities other than expanding into a call to a function named `(setf` reader`)`.

The following X3J13 cleanup issues, not part of the specification, apply to this section:

- SETF-MACRO-EXPANSION:LAST
- FUNCTION-NAME:LARGE

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