GenEx: Test early determination of AND and OR

It should be possible for example to do this:

 "$<AND:${FOO},$<BOOL:${TGT}>,$<BOOL:$<TARGET_PROPERTY:${TGT},PROP>"

such that it works simliarly to the C code:

 if (foo && tgt && tgt->prop())
   {
   }

The example of generator expression code is a little bit contrived as
it could be written other ways with the same functionality. Nevertheless,
as these cases already work and are intentional, test for them.

1 files changed, 9 insertions, 0 deletions

diff --git a/Tests/RunCMake/GeneratorExpression/BadOR-stderr.txt b/Tests/RunCMake/GeneratorExpression/BadOR-stderr.txt
index d4ccab7..eb26328 100644
--- a/Tests/RunCMake/GeneratorExpression/BadOR-stderr.txt
+++ b/Tests/RunCMake/GeneratorExpression/BadOR-stderr.txt
@@ -41,4 +41,13 @@ CMake Error at BadOR.cmake:1 \(add_custom_target\):
 
   Parameters to \$<OR> must resolve to either '0' or '1'.
 Call Stack \(most recent call first\):
+  CMakeLists.txt:3 \(include\)
++
+CMake Error at BadOR.cmake:1 \(add_custom_target\):
+  Error evaluating generator expression:
+
+    \$<OR:0,nothing>
+
+  Parameters to \$<OR> must resolve to either '0' or '1'.
+Call Stack \(most recent call first\):
   CMakeLists.txt:3 \(include\)$