Merge pull request #6433 from augusto2112/test-cxx-as-existential

[lldb] Test that a C++ class as a Swift existential is printed correctly

Author: augusto2112

lldb/test/API/lang/swift/cxx_interop/forward/cxx-class-as-existential/Makefile

@@ -0,0 +1,4 @@
+SWIFT_SOURCES := main.swift
+SWIFT_CXX_INTEROP := 1
+SWIFTFLAGS_EXTRAS = -Xcc -I$(SRCDIR) 
+include Makefile.rules

lldb/test/API/lang/swift/cxx_interop/forward/cxx-class-as-existential/TestCxxClassAsExistential.py

@@ -0,0 +1,22 @@
+
+"""
+Test that a C++ class as an existential is visible in Swift.
+"""
+from lldbsuite.test.lldbtest import *
+from lldbsuite.test.decorators import *
+
+
+class TestClass(TestBase):
+
+    @swiftTest
+    def test(self):
+        self.build()
+        self.runCmd('setting set target.experimental.swift-enable-cxx-interop true')
+        _, _, _, _= lldbutil.run_to_source_breakpoint(
+            self, 'Set breakpoint here', lldb.SBFileSpec('main.swift'))
+
+        self.expect('v x', substrs=['CxxClass', 'a1 = 10', 'a2 = 20', 'a3 = 30'])
+        self.expect('expr x', substrs=['CxxClass', 'a1 = 10', 'a2 = 20', 'a3 = 30'])
+
+        self.expect('v y', substrs=['InheritedCxxClass', 'a1 = 10', 'a2 = 20', 'a3 = 30', 'a4 = 40'])
+        self.expect('expr y', substrs=['InheritedCxxClass', 'a1 = 10', 'a2 = 20', 'a3 = 30', 'a4 = 40'])

lldb/test/API/lang/swift/cxx_interop/forward/cxx-class-as-existential/main.swift

@@ -0,0 +1,14 @@
+import ReturnsClass
+
+protocol P {}
+
+extension CxxClass: P{}
+
+extension InheritedCxxClass: P{}
+
+func main() {
+  let x: P = CxxClass()
+  let y:P = InheritedCxxClass()
+  print(1) // Set breakpoint here
+}
+main()

lldb/test/API/lang/swift/cxx_interop/forward/cxx-class-as-existential/module.modulemap

@@ -0,0 +1,4 @@
+module ReturnsClass {
+  header "returns-class.h"
+  requires cplusplus
+}

lldb/test/API/lang/swift/cxx_interop/forward/cxx-class-as-existential/returns-class.h

@@ -0,0 +1,10 @@
+
+struct CxxClass {
+  long long a1 = 10;
+  long long a2 = 20;
+  long long a3 = 30;
+};
+
+struct InheritedCxxClass: CxxClass {
+  long long a4 = 40;
+};