ad3c2c0b03
Every policy's documentation has a paragraph on what version of CMake introduced it, how to set the policy, and whether CMake warns if the policy is not set. The wording of this paragraph has diverged across policies over time. Factor the paragraph out into a standard advice document included by every policy.
23 lines
815 B
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23 lines
815 B
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CMP0085
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-------
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.. versionadded:: 3.14
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``$<IN_LIST:...>`` handles empty list items.
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In CMake 3.13 and lower, the ``$<IN_LIST:...>`` generator expression always
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returned ``0`` if the first argument was empty, even if the list contained an
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empty item. This behavior is inconsistent with the ``IN_LIST`` behavior of
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:command:`if`, which this generator expression is meant to emulate. CMake 3.14
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and later handles this case correctly.
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The ``OLD`` behavior of this policy is for ``$<IN_LIST:...>`` to always return
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``0`` if the first argument is empty. The ``NEW`` behavior is to return ``1``
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if the first argument is empty and the list contains an empty item.
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.. |INTRODUCED_IN_CMAKE_VERSION| replace:: 3.14
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.. |WARNS_OR_DOES_NOT_WARN| replace:: warns
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.. include:: STANDARD_ADVICE.txt
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.. include:: DEPRECATED.txt
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