How can I tell emacs how the arguments to my elisp function should be indented?

Question

I have written function (actually a macro, but whatever) that works similarly to progn. How can I tell emacs that this function should be indented in the same way as progn?

Answer 1

This should do it

(put 'myfunc 'lisp-indent-function 0)

Documentation for lisp-indent-function (found by C-h f lisp-indent-function RET):

lisp-indent-function is a compiled Lisp function in `lisp-mode.el'.

(lisp-indent-function indent-point state)

This function is the normal value of the variable lisp-indent-function. It is used when indenting a line within a function call, to see if the called function says anything special about how to indent the line.

indent-point is the position where the user typed TAB, or equivalent. Point is located at the point to indent under (for default indentation); state is the parse-partial-sexp state for that position.

If the current line is in a call to a Lisp function which has a non-nil property lisp-indent-function, that specifies how to do the indentation. The property value can be * defun, meaning indent defun-style; * an integer N, meaning indent the first N arguments specially like ordinary function arguments and then indent any further arguments like a body; * a function to call just as this function was called. If that function returns nil, that means it doesn't specify the indentation.

This function also returns nil meaning don't specify the indentation.