Joseph Ferano
69646e534e
(defmacro do-grid [[r rows c cols] & body] ...) — positional names, a [ ] pattern wherever an argument is a vector, and & for the tail. The reading of the list lives in Expand, below both sides that need it: Parse turns it into the bindings a macro body opens with, and Macro checks a call against the same reading before expanding it, so arity and shape are refused with the call's own location rather than with the Loc.from_macro stamp every node of an expansion carries. The breaking half: [args] used to bind the whole argument list and now binds the first argument. The whole list is [& args], and every defmacro in the tree — prelude, vendor, tests, the elisp fixtures — was migrated to it. One grammar, not a legacy mode.
10 lines
249 B
Plaintext
10 lines
249 B
Plaintext
;;;; Too many arguments, which is the half a & would have allowed. There is no
|
|
;;;; & in this list, so the count is exact and a third argument has nowhere to
|
|
;;;; go.
|
|
(defmacro pair [a b]
|
|
`(+ ~a ~b))
|
|
|
|
(defn main [] i32
|
|
(print (pair 1 2 3))
|
|
0)
|