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authorColby Pike <vectorofbool@gmail.com>2017-01-24 03:14:03 (GMT)
committerBrad King <brad.king@kitware.com>2017-01-26 16:18:50 (GMT)
commit895f7f16a79428689a263ba5cd9a72647dc8e912 (patch)
tree6c3ba32ffb5b9cbfedaf7e61ce45d63b94057c04 /Help
parent8ea12a8b80c4c3153cc602f1d0735b3db8581ae8 (diff)
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Genex: Add `IF` generator expression
This allows a single condition to be used to choose between two alternatives. Without this the condition must be duplicated with one surrounded by `NOT`. Closes: #15585
Diffstat (limited to 'Help')
-rw-r--r--Help/manual/cmake-generator-expressions.7.rst2
-rw-r--r--Help/release/dev/if-genex.rst7
2 files changed, 9 insertions, 0 deletions
diff --git a/Help/manual/cmake-generator-expressions.7.rst b/Help/manual/cmake-generator-expressions.7.rst
index 64d15a9..3a225ad 100644
--- a/Help/manual/cmake-generator-expressions.7.rst
+++ b/Help/manual/cmake-generator-expressions.7.rst
@@ -51,6 +51,8 @@ Available logical expressions are:
``0`` if all ``?`` are ``0``, else ``1``
``$<NOT:?>``
``0`` if ``?`` is ``1``, else ``1``
+``$<IF:?,true-value...,false-value...>```
+ ``true-value...`` if ``?`` is ``1``, ``false-value...`` if ``?`` is ``0``
``$<STREQUAL:a,b>``
``1`` if ``a`` is STREQUAL ``b``, else ``0``
``$<EQUAL:a,b>``
diff --git a/Help/release/dev/if-genex.rst b/Help/release/dev/if-genex.rst
new file mode 100644
index 0000000..62be3a7
--- /dev/null
+++ b/Help/release/dev/if-genex.rst
@@ -0,0 +1,7 @@
+genex-if
+--------
+
+* A new logical generator expression for immediate-if was added:
+ ``$<IF:cond,true-value,false-value>``. It takes three arguments: One
+ condition, a true-value, and a false-value. Resolves to the true-value if the
+ condition is ``1``, and resolves to the false-value if the condition is ``0``.