[DataFormatters] Add formatter for C++17 std::optional.

<rdar://problem/41471112>

Patch by Shafik Yaghmour.

Differential Revision:  https://reviews.llvm.org/D49271

llvm-svn: 337959

3 files changed, 93 insertions, 0 deletions

diff --git a/lldb/packages/Python/lldbsuite/test/functionalities/data-formatter/data-formatter-stl/libcxx/optional/Makefile b/lldb/packages/Python/lldbsuite/test/functionalities/data-formatter/data-formatter-stl/libcxx/optional/Makefile
new file mode 100644
index 00000000000..a6ea665ef63
--- /dev/null
+++ b/lldb/packages/Python/lldbsuite/test/functionalities/data-formatter/data-formatter-stl/libcxx/optional/Makefile
@@ -0,0 +1,7 @@
+LEVEL = ../../../../../make
+
+CXX_SOURCES := main.cpp
+
+USE_LIBCPP := 1
+include $(LEVEL)/Makefile.rules
+CXXFLAGS += -std=c++17
diff --git a/lldb/packages/Python/lldbsuite/test/functionalities/data-formatter/data-formatter-stl/libcxx/optional/TestDataFormatterLibcxxOptional.py b/lldb/packages/Python/lldbsuite/test/functionalities/data-formatter/data-formatter-stl/libcxx/optional/TestDataFormatterLibcxxOptional.py
new file mode 100644
index 00000000000..630b49693f4
--- /dev/null
+++ b/lldb/packages/Python/lldbsuite/test/functionalities/data-formatter/data-formatter-stl/libcxx/optional/TestDataFormatterLibcxxOptional.py
@@ -0,0 +1,59 @@
+"""
+Test lldb data formatter subsystem.
+"""
+
+from __future__ import print_function
+
+
+import os
+import time
+import lldb
+from lldbsuite.test.decorators import *
+from lldbsuite.test.lldbtest import *
+from lldbsuite.test import lldbutil
+
+
+class LibcxxOptionalDataFormatterTestCase(TestBase):
+
+    mydir = TestBase.compute_mydir(__file__)
+
+    @add_test_categories(["libc++"])
+
+    def test_with_run_command(self):
+        """Test that that file and class static variables display correctly."""
+        self.build()
+        self.runCmd("file " + self.getBuildArtifact("a.out"), CURRENT_EXECUTABLE_SET)
+
+        bkpt = self.target().FindBreakpointByID(
+            lldbutil.run_break_set_by_source_regexp(
+                self, "break here"))
+
+        self.runCmd("run", RUN_SUCCEEDED)
+
+        # The stop reason of the thread should be breakpoint.
+        self.expect("thread list", STOPPED_DUE_TO_BREAKPOINT,
+                    substrs=['stopped',
+                             'stop reason = breakpoint'])
+
+        self.expect("frame variable number_not_engaged",
+                    substrs=['Has Value=false'])
+
+        self.expect("frame variable number_engaged",
+                    substrs=['Has Value=true',
+                             'Value = 42',
+                             '}'])
+
+        self.expect("frame var numbers",
+                    substrs=['(optional_int_vect) numbers =  Has Value=true  {',
+                             'Value = size=4 {',
+                               '[0] = 1',
+                               '[1] = 2',
+                               '[2] = 3',
+                               '[3] = 4',
+                               '}',
+                             '}'])
+
+        self.expect("frame var ostring",
+                    substrs=['(optional_string) ostring =  Has Value=true  {',
+                        'Value = "hello"',
+                        '}'])
diff --git a/lldb/packages/Python/lldbsuite/test/functionalities/data-formatter/data-formatter-stl/libcxx/optional/main.cpp b/lldb/packages/Python/lldbsuite/test/functionalities/data-formatter/data-formatter-stl/libcxx/optional/main.cpp
new file mode 100644
index 00000000000..8ff54d1f119
--- /dev/null
+++ b/lldb/packages/Python/lldbsuite/test/functionalities/data-formatter/data-formatter-stl/libcxx/optional/main.cpp
@@ -0,0 +1,27 @@
+#include <cstdio>
+#include <string>
+#include <vector>
+#include <optional>
+
+using int_vect = std::vector<int> ;
+using optional_int = std::optional<int> ;
+using optional_int_vect = std::optional<int_vect> ;
+using optional_string = std::optional<std::string> ;
+
+int main()
+{
+    optional_int number_not_engaged ;
+    optional_int number_engaged = 42 ;
+
+    printf( "%d\n", *number_engaged) ;
+
+    optional_int_vect numbers{{1,2,3,4}} ;
+
+    printf( "%d %d\n", numbers.value()[0], numbers.value()[1] ) ;
+
+    optional_string ostring = "hello" ;
+
+    printf( "%s\n", ostring->c_str() ) ;
+
+    return 0; // break here
+}