(defn expression-info
"Uses the Clojure compiler to analyze the given s-expr. Returns
a map with keys :class and :primitive? indicating what the compiler
concluded about the return value of the expression. Returns nil if
not type info can be determined at compile-time.
Example: (expression-info '(+ (int 5) (float 10)))
Returns: {:class float, :primitive? true}"
[expr]
(let [fn-ast (Compiler/analyze Compiler$C/EXPRESSION `(fn [] ~expr))
expr-ast (.body (first (.methods fn-ast)))]
(when (.hasJavaClass expr-ast)
{:class (.getJavaClass expr-ast)
:primitive? (.isPrimitive (.getJavaClass expr-ast))})))
Vars in
clojure.contrib.repl-utils/expression-info:
defn
let
when
Used in 0 other vars
Source
clojure/contrib/repl_utils.clj:181
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