To reply to myself: it is an exported identifier that is used in a define-json-mapping. It is good form for macros to export all its auxiliary syntax.
-- Linus Björnstam On Wed, 2 Jun 2021, at 18:12, Linus Björnstam wrote: > It is a trick to allow using the symbol '<=> as an identifier instead > of quoting it. Nothing special. Guile-json probably uses it somehow. > > If it is used as auxiliary syntax in a macro, it is probably exported > so guile can warn that it is being shadowed instead of (or rather: in > addition to) producing bad error messages. > > -- > Linus Björnstam > > On Wed, 2 Jun 2021, at 16:06, Mortimer Cladwell wrote: > > Hi, > > What does <=> mean/do? > > It can be found in guile-json in the (json record) module, line 33: > > > > 33 #:export (<=> define-json-mapping define-json-type)) > > > > Not mentioned in the entire Guile manual. Happens to be defined on line 36 > > of the module: > > > > 36 (define <=> '<=>) > > > > I didn't find that very helpful :) > > Thanks > > Mortimer > > > >
