It seems that when we pass :context :dummy, it behaves not like when not
passing anything.
(cljs/eval-str (cljs/empty-state) " (def x 12) (if 45 23 21)" "bla" {:eval
cljs/js-eval :context :expr} identity) ; => {:error #error {:message "ERROR",
:data {:tag :cljs/analysis-error}, :cause #object[TypeError TypeError: 12 is
not a function]}}
(cljs/eval-str (cljs/empty-state) " (def x 12) (if 45 23 21)" "bla" {:eval
cljs/js-eval :context :dummy} identity) ; => {:ns cljs.user, :value 12}
(cljs/eval-str (cljs/empty-state) " (def x 12) (if 45 23 21)" "bla" {:eval
cljs/js-eval :context :statements} identity); => {:ns cljs.user, :value 23}
It might be more convenient to look at it with KLIPSE:
http://tinyurl.com/eval-str-context-confusion
On Tuesday, 26 April 2016 18:24:31 UTC+3, Thomas Heller wrote:
> The :context basically tells the compiler if the return value is required
> (:statement vs. :expr). A :statement does not need to return something and
> "if" in javascript does not return something.
>
> If an "if" is compiled with :expr it generates (condition ? yes : no)
> instead of "if" for :statement.
>
> The compiler assumes :statement as the default for the top-level but when
> working with a REPL that is not the case since you want the result, so :expr
> must be set. The standard cljs repl wraps everything in a pr-str so that
> problem does not show there.
>
> Hope that made sense, but no it is not a bug.
>
> Cheers,
> /thomas
>
>
> On Tuesday, April 26, 2016 at 4:07:12 PM UTC+2, J David Eisenberg wrote:
> > Sorry for the bad netiquette of responding to one's own post, but I am
> > wondering if the compile in the condition that doesn't use {:content :expr}
> > is a bug rather than something that should be expected.
(cljs/eval-str (cljs/empty-state) " (def x 12) (if 45 23 21)" "bla" {:eval
cljs/js-eval :context :expr} identity)
{:error #error {:message "ERROR", :data {:tag :cljs/analysis-error}, :cause
#object[TypeError TypeError: 12 is not a function]}}
klipse.compiler=> (cljs/eval-str (cljs/empty-state) " (def x 12) (if 45 23 21)"
"bla" {:eval cljs/js-eval :context :statement} identity)
{:ns cljs.user, :value 12}
klipse.compiler=> (cljs/eval-str (cljs/empty-state) " (def x 12) (if 45 23 21)"
"bla" {:eval cljs/js-eval :context :statements} identity)
{:ns cljs.user, :value 23}
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