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 >
