The Eastwood [1] Clojure lint tool has a few warnings in it that warn about unused metadata in your code.
The :unused-meta-on-macro warns about metadata on macro invocations, which is usually ignored by Clojure [2]. The :wrong-tag warns about unused type tag metadata on Vars, and non-fully-qualified Java class names on arg vectors [3]. Andy [1] https://github.com/jonase/eastwood [2] https://github.com/jonase/eastwood#unused-meta-on-macro [3] https://github.com/jonase/eastwood#wrong-tag On Tue, May 5, 2015 at 5:51 PM, Mike Rodriguez <mjr4...@gmail.com> wrote: > > What you wanted here was > > (meta '^:abc some-symbol) > > It's a little weird but the reader attaches the metadata to the symbol. > Then the quote just evaluates directly to the same symbol, so the metadata > is preserved. > > I agree that metadata can be confusing though. Especially around where AND > HOW you put the metadata for a functions return value(s). > > See [1] for more on that confusing track... > > Also there are plenty of subtle "gotchas" to macros etc that do not > preserve metadata. 'clojure.core/or' is a good example of that. > > A search for "Clojure preserve metadata" will likely turn up a good list > of Jiras out there to fix areas that do not preserve metadata as expected. > > Looks like there are some tips at [2]. > > [1] http://dev.clojure.org/jira/browse/CLJ-1232 > [2] > http://stackoverflow.com/questions/4673011/what-functions-in-clojure-core-preserve-meta > > -- > 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/d/optout. > -- 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/d/optout.
