Teach the "extend char types" (char16_t, char32_t and wchar_t) formatters that a *single character* whose value is 0 is actually a valid thing to print out

llvm-svn: 242572

lldb/source/DataFormatters/CXXFormatterFunctions.cpp

@@ -362,6 +362,7 @@ lldb_private::formatters::Char16SummaryProvider (ValueObject& valobj, Stream& st
     options.SetPrefixToken('u');
     options.SetQuote('\'');
     options.SetSourceSize(1);
+    options.SetBinaryZeroIsTerminator(false);
     
     return ReadBufferAndDumpToStream<StringElementType::UTF16>(options);
 }
@@ -387,6 +388,7 @@ lldb_private::formatters::Char32SummaryProvider (ValueObject& valobj, Stream& st
     options.SetPrefixToken('U');
     options.SetQuote('\'');
     options.SetSourceSize(1);
+    options.SetBinaryZeroIsTerminator(false);
     
     return ReadBufferAndDumpToStream<StringElementType::UTF32>(options);
 }
@@ -407,6 +409,7 @@ lldb_private::formatters::WCharSummaryProvider (ValueObject& valobj, Stream& str
     options.SetPrefixToken('L');
     options.SetQuote('\'');
     options.SetSourceSize(1);
+    options.SetBinaryZeroIsTerminator(false);
     
     return ReadBufferAndDumpToStream<StringElementType::UTF16>(options);
 }

lldb/test/lang/cpp/char1632_t/TestChar1632T.py

@@ -76,6 +76,12 @@ class Char1632TestCase(TestBase):
         self.expect("frame variable s16 s32",
             substrs = ['(char16_t *) s16 = 0x','(char32_t *) s32 = ','"色ハ匂ヘト散リヌルヲ"','"෴"'])
 
+        # check that zero values are properly handles
+        self.expect('frame variable cs16_zero', substrs=["U+0000 u'\\0'"])
+        self.expect('frame variable cs32_zero', substrs=["U+0x00000000 U'\\0'"])
+        self.expect('expression cs16_zero', substrs=["U+0000 u'\\0'"])
+        self.expect('expression cs32_zero', substrs=["U+0x00000000 U'\\0'"])
+
         # Check that we can run expressions that return charN_t
         self.expect("expression u'a'",substrs = ['(char16_t) $',"61 u'a'"])
         self.expect("expression U'a'",substrs = ['(char32_t) $',"61 U'a'"])

lldb/test/lang/cpp/char1632_t/main.cpp

@@ -10,6 +10,8 @@
 
 int main (int argc, char const *argv[])
 {
+  auto cs16_zero = (char16_t)0;
+  auto cs32_zero = (char32_t)0;
     auto cs16 = u"hello world ྒྙྐ";
 	auto cs32 = U"hello world ྒྙྐ";
     char16_t *s16 = (char16_t *)u"ﺸﺵۻ";

lldb/test/lang/cpp/wchar_t/TestCxxWCharT.py

@@ -78,6 +78,9 @@ class CxxWCharTTestCase(TestBase):
 
         self.expect("frame variable array",substrs = ['L"Hey, I\'m a super wchar_t string'])
         self.expect("frame variable array",substrs = ['[0]'], matching=False)
+        
+        self.expect('frame variable wchar_zero', substrs=["L'\\0'"])
+        self.expect('expression wchar_zero', substrs=["L'\\0'"])
 
 if __name__ == '__main__':
     import atexit

lldb/test/lang/cpp/wchar_t/main.cpp

@@ -29,6 +29,7 @@ int main (int argc, char const *argv[])
     wchar_t *ws_NULL = nullptr;
     wchar_t *ws_empty = L"";
   	wchar_t array[200], * array_source = L"Hey, I'm a super wchar_t string, éõñž";
+    wchar_t wchar_zero = (wchar_t)0;
   	memcpy(array, array_source, 39 * sizeof(wchar_t));
     return 0; // Set break point at this line.
 }