cmake_command: Add command to INVOKE other commands by name

Fixes: #18392

3 files changed, 48 insertions, 0 deletions

diff --git a/Help/command/cmake_command.rst b/Help/command/cmake_command.rst
new file mode 100644
index 0000000..9281647
--- /dev/null
+++ b/Help/command/cmake_command.rst
@@ -0,0 +1,40 @@
+cmake_command
+-------------
+
+Call meta-operations on CMake commands.
+
+Synopsis
+^^^^^^^^
+
+.. parsed-literal::
+
+  cmake_command(`INVOKE`_ <command> [<args>...])
+
+Introduction
+^^^^^^^^^^^^
+
+This command will call meta-operations on built-in CMake commands or
+those created via the :command:`macro` or :command:`function` commands.
+
+Invoking
+^^^^^^^^
+
+.. _INVOKE:
+
+.. code-block:: cmake
+
+  cmake_command(INVOKE <command> [<args>...])
+
+Invokes the named ``<command>`` with the given arguments (if any).
+For example, the code:
+
+.. code-block:: cmake
+
+  set(message_command "message")
+  cmake_command(INVOKE ${message_command} STATUS "Hello World!")
+
+is equivalent to
+
+.. code-block:: cmake
+
+  message(STATUS "Hello World!")
diff --git a/Help/command/function.rst b/Help/command/function.rst
index 53ba754..30938b3 100644
--- a/Help/command/function.rst
+++ b/Help/command/function.rst
@@ -44,11 +44,15 @@ can be invoked through any of
   foo()
   Foo()
   FOO()
+  cmake_command(INVOKE foo)
 
 and so on. However, it is strongly recommended to stay with the
 case chosen in the function definition. Typically functions use
 all-lowercase names.
 
+The :command:`cmake_command(INVOKE ...)` command can also be used to invoke the
+function.
+
 Arguments
 ^^^^^^^^^
 
diff --git a/Help/command/macro.rst b/Help/command/macro.rst
index 3f6f2f9..ee955cb 100644
--- a/Help/command/macro.rst
+++ b/Help/command/macro.rst
@@ -42,11 +42,15 @@ can be invoked through any of
   foo()
   Foo()
   FOO()
+  cmake_command(INVOKE foo)
 
 and so on. However, it is strongly recommended to stay with the
 case chosen in the macro definition.  Typically macros use
 all-lowercase names.
 
+The :command:`cmake_command(INVOKE ...)` command can also be used to invoke the
+macro.
+
 Arguments
 ^^^^^^^^^