C-c C-m. One step on the bare key, the fixpoint under C-u: a macro may
quasiquote a call to another macro, and Loc.from_macro is outermost-wins, so
by the time a full expansion settles the intermediate name is gone. One step
is the only thing that can say which macro produced what.
The expansion runs against the macros the *session* holds -- the prelude's,
its imports', and every defmacro evaluated since it started -- and writes
nothing back: a defmacro handed to C-c C-m does not join the session by having
been looked at.
Both non-termination refusals stay refusals, and only where they are needed.
One step makes one call and does not look at the answer, so (s/spin) one-
stepped answers with itself; all the way hits the fuel and names the macro,
inside Dev.serve's guard, so the daemon replies rather than hanging. Macro's
module handling is a Fun.protect now -- a build that raised was a process
about to exit, and the daemon is not that process.
No printer for a Form existed. Form.to_string is an error-message renderer and
is what Macro.key digests, so it is untouched; Form.to_source round-trips
floats, strings and bytes through the reader, and Form.pretty decides where
the line breaks go and leaves the columns to flan-mode.
The answer is a read-only flan-mode buffer shaped like the disassembly one,
with cnr's idea in it: m expands the form at point one more step in place.
Three inherited keys refuse by name -- an expansion is in no file. The text is
sent padded onto its own line and its own column, unlike C-x C-e, so the
refusal lands on the call and not at the start of its line.
The script is in tools/ rather than thrown away, because two lanes are
writing Flan in the old spelling right now and their files need the same
pass at merge.
It works on forms, not on text: a keyword becomes a dot only where it sits
in a field-label position inside a brace, so an enum member in value
position, a map key inside an EDN string and a type-position {K V} are all
left alone. :keys keeps its colon -- it names no field.
