Refactor: Introduce `cmArgumentList` container class

The `cmArgumentList` has been turned into a class (forward declared in
the header). It inherits from the `std::list` (yeah, but we don't intend
to store polymorphic classes in it). In addition to the standard methods,
now it's possible to move `HandlePredicate` (renamed to `ReduceOneArg`)
and `HandleBinaryOp` (renamed to `ReduceTwoArgs`) as its members.

Additionally, iterators managements (`IncrementArguments`) have been
refactored into two separate classes mimicking iterators. This also
allows having a uniform `for` loop and concentrates the logic of
iterators advancing in it instead of the loop's body. The arguments
processing algorithms operate with "windows" over a collection of
arguments. Hence there are two kinds of "iteration windows" -- allowing
to observe 2 or 3 elements per loop iteration. These iteration "windows"
also passed to reducers.

1 files changed, 36 insertions, 0 deletions

diff --git a/Tests/RunCMake/if/IncompleteMatches.cmake b/Tests/RunCMake/if/IncompleteMatches.cmake
new file mode 100644
index 0000000..7142cfc
--- /dev/null
+++ b/Tests/RunCMake/if/IncompleteMatches.cmake
@@ -0,0 +1,36 @@
+if(MATCHES)
+  message(SEND_ERROR "Test #1 failed")
+else()
+  message(STATUS "Test #1 passed")
+endif()
+
+if("" MATCHES "")
+  message(STATUS "Test #2 passed")
+else()
+  message(SEND_ERROR "Test #2 failed")
+endif()
+
+if(MATCHES RHS)
+  message(SEND_ERROR "Test #3 failed")
+else()
+  message(STATUS "Test #3 passed")
+endif()
+
+set(RHS "")
+if(MATCHES RHS)
+  message(SEND_ERROR "Test #4 failed")
+else()
+  message(STATUS "Test #4 passed")
+endif()
+
+if(MATCHES "^$")
+  message(SEND_ERROR "Test #5 failed")
+else()
+  message(STATUS "Test #5 passed")
+endif()
+
+if("" MATCHES "^$")
+  message(STATUS "Test #6 passed")
+else()
+  message(SEND_ERROR "Test #6 failed")
+endif()