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#### Overview <a id="range.zip.transform.overview">[[range.zip.transform.overview]]</a>
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`zip_transform_view` takes an invocable object and any number of views
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and produces a view whose Mᵗʰ element is the result of applying the
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invocable object to the Mᵗʰ elements of all views.
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The name `views::zip_transform` denotes a customization point object
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[[customization.point.object]]. Let `F` be a subexpression, and let
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`Es...` be a pack of subexpressions.
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- If `Es` is an empty pack, let `FD` be `decay_t<decltype((F))>`.
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- If `move_constructible<FD> &&
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regular_invocable<FD&>` is `false`, or if
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`decay_t<invoke_result_t<FD&>>` is not an object type,
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`views::zip_transform(F, Es...)` is ill-formed.
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- Otherwise, the expression `views::zip_transform(F, Es...)` is
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expression-equivalent to
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``` cpp
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((void)F, auto(views::empty<decay_t<invoke_result_t<FD&>>>))
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```
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- Otherwise, the expression `views::zip_transform(F, Es...)` is
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expression-equivalent to `zip_transform_view(F, Es...)`.
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[*Example 1*:
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``` cpp
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vector v1 = {1, 2};
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vector v2 = {4, 5, 6};
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for (auto i : views::zip_transform(plus(), v1, v2)) {
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cout << i << ' '; // prints 5 7
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}
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```
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— *end example*]
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