Change TypeSystem::GetBitSize() to return an optional result.

This patch changes the behavior when printing C++ function references:
where we previously would get a <could not determine size>, there is
now a <no summary available>. It's not clear to me whether this is a
bug or an omission, but it's one step further than LLDB previously
got.

Differential Revision: https://reviews.llvm.org/D56798

llvm-svn: 351376

1 files changed, 4 insertions, 0 deletions

diff --git a/lldb/packages/Python/lldbsuite/test/lang/c/struct_types/main.c b/lldb/packages/Python/lldbsuite/test/lang/c/struct_types/main.c
index 29ac10cb94a..02fefd36cee 100644
--- a/lldb/packages/Python/lldbsuite/test/lang/c/struct_types/main.c
+++ b/lldb/packages/Python/lldbsuite/test/lang/c/struct_types/main.c
@@ -29,6 +29,10 @@ int main (int argc, char const *argv[])
        //% self.expect("expression -- (pt.padding[0])", DATA_TYPES_DISPLAYED_CORRECTLY, substrs = ["(char)", " = "])
        //% self.expect("image lookup -t point_tag", DATA_TYPES_DISPLAYED_CORRECTLY, substrs = ['padding[]']) # Once rdar://problem/12566646 is fixed, this should display correctly
 
+    struct {} empty;
+    //% self.expect("frame variable empty", substrs = ["empty = {}"])
+    //% self.expect("expression -- sizeof(empty)", substrs = ["= 0"])
+
     struct rect_tag {
         struct point_tag bottom_left;
         struct point_tag top_right;