Macroexpansion

Typing C-c C-m after some form in a source buffer or the REPL will show you the macro expansion of the form in a new buffer. You’ll have access to additional keybindings in the macro expansion buffer (which is internally using cider-macroexpansion-mode):

Keyboard shortcut Description

Keyboard shortcut	Description
`m`	Invoke `macroexpand-1` on the form at point and replace the original form with its expansion. If invoked with a prefix argument, `macroexpand` is used instead of `macroexpand-1`.
`a`	Invoke `clojure.walk/macroexpand-all` on the form at point and replace the original form with its expansion.
`g`	The prior macro expansion is performed again and the current contents of the macro expansion buffer are replaced with the new expansion.
`C-/` `u`	Undo the last in-place expansion performed in the macroexpansion buffer.

m

Invoke macroexpand-1 on the form at point and replace the original form with its expansion. If invoked with a prefix argument, macroexpand is used instead of macroexpand-1.

a

Invoke clojure.walk/macroexpand-all on the form at point and replace the original form with its expansion.

g

The prior macro expansion is performed again and the current contents of the macro expansion buffer are replaced with the new expansion.

C-/
u

Undo the last in-place expansion performed in the macroexpansion buffer.