Fix incorrect computation of return_type of itr
#287
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The `itr` return type was assumed to be always the same as the first element. This is false for many objects, such as Tuple. Additionally, it was using a private API (Core.Compiler and Core.Compiler.return_type) which are not stable across versions of Julia and may return weird and unpredictable answers. Switch to using the API in Base for this.
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Thanks for the PR!
That part should be fine as we only really use that for empty iterables: the |
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The
itrreturn type was assumed to be always the same as the first element. This is false for many objects, such as Tuple. Additionally, it was using a private API (Core.Compiler andCore.Compiler.return_type) which are not stable across versions of Julia and may return weird and unpredictable answers. Switch to using the API in Base for this.