From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.io!.POSTED.ciao.gmane.io!not-for-mail From: Jan Synacek Newsgroups: gmane.lisp.guile.bugs Subject: bug#41353: (thunk? 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Sun, 17 May 2020 07:46:52 -0700 (PDT) X-Google-Smtp-Source: ABdhPJx2N0ztQ7JBFZKe60OfTfk1qh5HJDqNpr8vfwdHECo66BFiDBxPOUtoxM/o42rQ/E5Bj9g3vhX8MHhybC+pFKY= X-Received: by 2002:a2e:9a41:: with SMTP id k1mr5231341ljj.143.1589726812103; Sun, 17 May 2020 07:46:52 -0700 (PDT) In-Reply-To: <87wo5ay7pp.fsf@fencepost.gnu.org> X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: redhat.com X-BeenThere: debbugs-submit@debbugs.gnu.org X-Mailman-Version: 2.1.18 Precedence: list X-BeenThere: bug-guile@gnu.org List-Id: "Bug reports for GUILE, GNU's Ubiquitous Extension Language" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: bug-guile-bounces+guile-bugs=m.gmane-mx.org@gnu.org Original-Sender: "bug-guile" Xref: news.gmane.io gmane.lisp.guile.bugs:9769 Archived-At: On Sun, May 17, 2020 at 4:09 PM David Kastrup wrote: > I think this is more a matter of the documentation being not quite right: > > -- Scheme Procedure: thunk? obj > -- C Function: scm_thunk_p (obj) > Return =E2=80=98#t=E2=80=99 if OBJ is a thunk=E2=80=94a procedure th= at does not accept > arguments. > > "if OBJ can serve as a thunk=E2=80=94a procedure called without arguments= ." > > Note that (thunk? (lambda x x)) also returns #t and that ((const 1)) > returns 1. But both (lambda x ...) and (const whatever) are still a procedure that acc= epts an argument, aren't they? My understanding of thunk is (lambda () ...), because that's a procedure that takes zero arguments.