Hi,
I want to attach reader metadata to a var, in a similar fashion to the :tag
key.
(^{:a :b} float? 1)
My use case is manual instantiation of type arguments to polymorphic
functions. I need the compiler
to add a metadata map to the results of analysis. In the absence of reader
macros, this seems to be
the only strategy.
(ast macro from `analyze <https://github.com/frenchy64/analyze>`)
Current behaviour:
;; Without reader metadata ...
typed.core=> (ast float?)
{:op :var, :env {:locals {}, :ns {:name typed.core}}, :var
#'clojure.core/float?, *:tag nil*}
;; :tag is handled explicitly by the Compiler
typed.core=> (ast *^{:tag Class}* float?)
{:op :var, :env {:locals {}, :ns {:name typed.core}}, :var
#'clojure.core/float?, *:tag Class*}
;; .. but other metadata is thrown away.
typed.core=> (ast *^{:a :b}* float?)
{:op :var, :env {:locals {}, :ns {:name typed.core}}, :var
#'clojure.core/float?, *:tag nil*}
Ideal behaviour :
;; Could return a map via a :meta key
typed.core=> (ast *^{:a :b}* float?)
{:op :var, :env {:locals {}, :ns {:name typed.core}}, :var
#'clojure.core/float?, :tag nil, *:meta {:a :b}*}
Any thoughts, suggestions, advice welcome.
Thanks,
Ambrose
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