[lldb][test] Move std::string_view from libcxx to generic directory

lldb/test/API/functionalities/data-formatter/data-formatter-stl/generic/string_view/Makefile

@@ -0,0 +1,4 @@
+CXX_SOURCES := main.cpp
+CXXFLAGS_EXTRAS := -std=c++17
+
+include Makefile.rules

lldb/test/API/functionalities/data-formatter/data-formatter-stl/generic/string_view/TestDataFormatterStdStringView.py

@@ -0,0 +1,165 @@
+# coding=utf8
+"""
+Test lldb data formatter subsystem.
+"""
+
+
+import lldb
+from lldbsuite.test.decorators import *
+from lldbsuite.test.lldbtest import *
+from lldbsuite.test import lldbutil
+
+
+class StdStringViewDataFormatterTestCase(TestBase):
+    def setUp(self):
+        # Call super's setUp().
+        TestBase.setUp(self)
+        # Find the line number to break at.
+        self.line1 = line_number("main.cpp", "// Set break point at this line.")
+        self.line2 = line_number(
+            "main.cpp", "// Break here to look at bad string view."
+        )
+
+    def do_test(self):
+        """Test that that file and class static variables display correctly."""
+        self.runCmd("file " + self.getBuildArtifact("a.out"), CURRENT_EXECUTABLE_SET)
+
+        lldbutil.run_break_set_by_file_and_line(
+            self, "main.cpp", self.line1, num_expected_locations=-1
+        )
+        lldbutil.run_break_set_by_file_and_line(
+            self, "main.cpp", self.line2, num_expected_locations=-1
+        )
+
+        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"],
+        )
+
+        # This is the function to remove the custom formats in order to have a
+        # clean slate for the next test case.
+        def cleanup():
+            self.runCmd("type format clear", check=False)
+            self.runCmd("type summary clear", check=False)
+            self.runCmd("type filter clear", check=False)
+            self.runCmd("type synth clear", check=False)
+
+        # Execute the cleanup function during test case tear down.
+        self.addTearDownHook(cleanup)
+
+        self.expect_var_path("wempty", type="std::wstring_view", summary='L""')
+        self.expect_var_path(
+            "s", type="std::wstring_view", summary='L"hello world! מזל טוב!"'
+        )
+        self.expect_var_path("S", type="std::wstring_view", summary='L"!!!!"')
+        self.expect_var_path("empty", type="std::string_view", summary='""')
+        self.expect_var_path("q_source", type="std::string", summary='"hello world"')
+        self.expect_var_path("q", type="std::string_view", summary='"hello world"')
+        self.expect_var_path(
+            "Q",
+            type="std::string_view",
+            summary='"quite a long std::strin with lots of info inside it"',
+        )
+        self.expect_var_path(
+            "IHaveEmbeddedZeros", type="std::string_view", summary='"a\\0b\\0c\\0d"'
+        )
+        self.expect_var_path(
+            "IHaveEmbeddedZerosToo",
+            type="std::wstring_view",
+            summary='L"hello world!\\0てざ ル゜䋨ミ㠧槊 きゅへ狦穤襩 じゃ馩リョ 䤦監"',
+        )
+        self.expect_var_path("u16_string", type="std::u16string_view", summary='u"ß水氶"')
+        self.expect_var_path("u16_empty", type="std::u16string_view", summary='u""')
+        self.expect_var_path(
+            "u32_string", type="std::u32string_view", summary='U"🍄🍅🍆🍌"'
+        )
+        self.expect_var_path("u32_empty", type="std::u32string_view", summary='U""')
+        self.expect_var_path(
+            "oops", type="std::string_view", summary='"Hellooo World\\n"'
+        )
+
+        # GetSummary returns None so can't be checked by expect_var_path, so we
+        # use the str representation instead
+        null_obj = self.frame().GetValueForVariablePath("null_str")
+        self.assertEqual(null_obj.GetSummary(), "Summary Unavailable")
+        self.assertEqual(str(null_obj), "(std::string_view *) null_str = nullptr")
+
+        self.runCmd("n")
+
+        TheVeryLongOne = self.frame().FindVariable("TheVeryLongOne")
+        summaryOptions = lldb.SBTypeSummaryOptions()
+        summaryOptions.SetCapping(lldb.eTypeSummaryUncapped)
+        uncappedSummaryStream = lldb.SBStream()
+        TheVeryLongOne.GetSummary(uncappedSummaryStream, summaryOptions)
+        uncappedSummary = uncappedSummaryStream.GetData()
+        self.assertGreater(
+            uncappedSummary.find("someText"),
+            0,
+            "uncappedSummary does not include the full string",
+        )
+        summaryOptions.SetCapping(lldb.eTypeSummaryCapped)
+        cappedSummaryStream = lldb.SBStream()
+        TheVeryLongOne.GetSummary(cappedSummaryStream, summaryOptions)
+        cappedSummary = cappedSummaryStream.GetData()
+        self.assertLessEqual(
+            cappedSummary.find("someText"), 0, "cappedSummary includes the full string"
+        )
+
+        self.expect_expr(
+            "s",
+            result_type="std::wstring_view",
+            result_summary='L"hello world! מזל טוב!"',
+        )
+
+        self.expect_var_path("wempty", type="std::wstring_view", summary='L""')
+        self.expect_var_path(
+            "s", type="std::wstring_view", summary='L"hello world! מזל טוב!"'
+        )
+        self.expect_var_path("S", type="std::wstring_view", summary='L"!!!!"')
+        self.expect_var_path("empty", type="std::string_view", summary='""')
+        self.expect_var_path("q_source", type="std::string", summary='"Hello world"')
+        self.expect_var_path("q", type="std::string_view", summary='"Hello world"')
+        self.expect_var_path(
+            "Q",
+            type="std::string_view",
+            summary='"quite a long std::strin with lots of info inside it"',
+        )
+        self.expect_var_path(
+            "IHaveEmbeddedZeros", type="std::string_view", summary='"a\\0b\\0c\\0d"'
+        )
+        self.expect_var_path(
+            "IHaveEmbeddedZerosToo",
+            type="std::wstring_view",
+            summary='L"hello world!\\0てざ ル゜䋨ミ㠧槊 きゅへ狦穤襩 じゃ馩リョ 䤦監"',
+        )
+        self.expect_var_path("u16_string", type="std::u16string_view", summary='u"ß水氶"')
+        self.expect_var_path("u16_empty", type="std::u16string_view", summary='u""')
+        self.expect_var_path(
+            "u32_string", type="std::u32string_view", summary='U"🍄🍅🍆🍌"'
+        )
+        self.expect_var_path("u32_empty", type="std::u32string_view", summary='U""')
+
+        self.runCmd("cont")
+        self.expect(
+            "thread list",
+            STOPPED_DUE_TO_BREAKPOINT,
+            substrs=["stopped", "stop reason = breakpoint"],
+        )
+
+        broken_obj = self.frame().GetValueForVariablePath("in_str_view")
+        self.assertEqual(broken_obj.GetSummary(), "Summary Unavailable")
+
+    @expectedFailureAll(
+        bugnumber="llvm.org/pr36109", debug_info="gmodules", triple=".*-android"
+    )
+    # Inline namespace is randomly ignored as Clang due to broken lookup inside
+    # the std namespace.
+    @expectedFailureAll(debug_info="gmodules")
+    @add_test_categories(["libc++"])
+    def test_libcxx(self):
+        self.build(dictionary={"USE_LIBCPP" : 1})
+        self.do_test()