On Mon, Apr 29, 2013 at 1:57 PM, noahlz <nzuc...@gmail.com> wrote: > Ok. The parser reads a single complete expression and discards the rest. > It understands that once it has hit a new character that represents the > beginning of a new expression, it doesn't care. > > I suppose I thought the parser would raise an error on detecting an > unmatched parenthesis, but that's wrong. > > Interestingly, when I try this at the repl (1.5.1) it errors as I expected > (probably why I expected it in the first place): > > user=> 1000N) > 1000N > > RuntimeException Unmatched delimiter: ) > clojure.lang.Util.runtimeException (Util.java:219) > > > Of course, the repl doesn't use "read-string." So, the next step in my > journey is to investigate the source of clojure.main. But - someone wants > to take the opportunity to ruin the surprise for me - with a more detailed > explanation / theory discussion - I'm open to it :) >
But notice that this *also* returns 1000N, first. So the cases aren't that different: it managed to read a complete expression, and evaluated it. Then it tried to read *another* expression from the unconsumed input. The difference is only that read-string doesn't attempt to exhaust its input argument. -- Ben Wolfson "Human kind has used its intelligence to vary the flavour of drinks, which may be sweet, aromatic, fermented or spirit-based. ... Family and social life also offer numerous other occasions to consume drinks for pleasure." [Larousse, "Drink" entry] -- -- You received this message because you are subscribed to the Google Groups "Clojure" group. To post to this group, send email to clojure@googlegroups.com Note that posts from new members are moderated - please be patient with your first post. To unsubscribe from this group, send email to clojure+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/clojure?hl=en --- You received this message because you are subscribed to the Google Groups "Clojure" group. To unsubscribe from this group and stop receiving emails from it, send an email to clojure+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/groups/opt_out.
