Certainly; so perhaps you should use the r6rs read instead of the Racket read.
Robby On Tue, Feb 1, 2011 at 10:39 AM, qld3303 <[email protected]> wrote: > Thanks, I understand it now. Racket is not Scheme but if I were to strictly > follow the R6RS, then both should fail, since both characters and booleans > require delimiters. > > On Tue, Feb 1, 2011 at 9:35 AM, Matthew Flatt <[email protected]> wrote: >> >> Different Scheme variants vary in whether `#t' and `#f' must be >> followed by a delimiter. R6RS, for example, requires a delimiter. >> >> Prior to version 5.0.2, Racket did not require a delimiter, but now it >> does (while `#true' and `#false' are also allowed as booleans). >> >> At Tue, 1 Feb 2011 08:59:04 -0600, qld3303 wrote: >> > Hello, >> > I'm a beginner trying to write a simple Scheme interpreter to help >> > understand Racket better. I try to mimic the results from the repl as >> > best >> > possible however in some cases I'm not sure how to reproduce them, this >> > being one such case. It seems to imply that an identifier or something >> > other than a boolean could begin with #t but I'm not sure. I tried this >> > using Guile and got the opposite results: >> > guile> (+ 3 1)#t+ >> > 4 >> > #t >> > #<primitive-generic +> >> > guile> (+ 3 1)#\t+ >> > 4 >> > ERROR: In procedure scm_lreadr: >> > ERROR: #<unknown port>:2:1: unknown character name t+ >> > ABORT: (read-error) >> > >> > Currently, my naive repl will work for both characters and booleans but >> > perhaps it shouldn't? >> > >> > Thanks >> > >> > On Mon, Jan 31, 2011 at 9:13 PM, qld3303 <[email protected]> wrote: >> > >> > > I'm not clear as to why the following occurs: >> > > >> > > > (+ 3 1)#t+ >> > > 4 >> > > readline-input::183: read: bad syntax `#t+' >> > > >> > > > (+ 3 1)#\t+ >> > > 4 >> > > #\t >> > > #<procedure:+> >> > > >> > > Why doesn't it recognize that #t is a boolean value? >> > > >> > _________________________________________________ >> > For list-related administrative tasks: >> > http://lists.racket-lang.org/listinfo/users > > > _________________________________________________ > For list-related administrative tasks: > http://lists.racket-lang.org/listinfo/users > _________________________________________________ For list-related administrative tasks: http://lists.racket-lang.org/listinfo/users
