[clang][IFS] Adding support for new clang interface stubs decl types.

NamespaceAliasDecl UnresolvedUsingTypenameDecl CXXDeductionGuideDecl
ConstructorUsingShadowDecl

Differential Revision: https://reviews.llvm.org/D70728

Author: plotfi

clang/lib/Frontend/InterfaceStubFunctionsConsumer.cpp

@@ -195,6 +195,10 @@ class InterfaceStubFunctionsConsumer : public ASTConsumer {
     case Decl::Kind::TemplateTemplateParm:
     case Decl::Kind::ClassTemplatePartialSpecialization:
     case Decl::Kind::IndirectField:
+    case Decl::Kind::ConstructorUsingShadow:
+    case Decl::Kind::CXXDeductionGuide:
+    case Decl::Kind::NamespaceAlias:
+    case Decl::Kind::UnresolvedUsingTypename:
       return true;
     case Decl::Kind::Var: {
       // Bail on any VarDecl that either has no named symbol.

clang/test/InterfaceStubs/constructor-using-shadow.cpp

@@ -0,0 +1,12 @@
+// RUN: %clang_cc1 -o - -emit-interface-stubs %s | FileCheck %s
+
+// CHECK:      --- !experimental-ifs-v1
+// CHECK-NEXT: IfsVersion: 1.0
+// CHECK-NEXT: Triple:
+// CHECK-NEXT: ObjectFileFormat: ELF
+// CHECK-NEXT: Symbols:
+// CHECK-NEXT: ...
+
+ // ConstructorUsingShadowDecl
+struct Base { Base(int); };
+struct Derived : public Base { using Base::Base; };

clang/test/InterfaceStubs/cxxdeduction-guide.cpp

@@ -0,0 +1,12 @@
+// RUN: %clang_cc1 -o - -emit-interface-stubs -std=c++17 %s | FileCheck %s
+
+// CHECK:      --- !experimental-ifs-v1
+// CHECK-NEXT: IfsVersion: 1.0
+// CHECK-NEXT: Triple:
+// CHECK-NEXT: ObjectFileFormat: ELF
+// CHECK-NEXT: Symbols:
+// CHECK-NEXT: ...
+
+// CXXDeductionGuideDecl
+template<typename T> struct A { A(); A(T); };
+A() -> A<int>;

clang/test/InterfaceStubs/namespace-alias.cpp

@@ -0,0 +1,12 @@
+// RUN: %clang_cc1 -o - -emit-interface-stubs %s | FileCheck %s
+
+// CHECK:      --- !experimental-ifs-v1
+// CHECK-NEXT: IfsVersion: 1.0
+// CHECK-NEXT: Triple:
+// CHECK-NEXT: ObjectFileFormat: ELF
+// CHECK-NEXT: Symbols:
+// CHECK-NEXT: ...
+
+// NamespaceAliasDecl
+namespace NS { }
+namespace B = NS;

clang/test/InterfaceStubs/unresolved-using-typename.cpp

@@ -0,0 +1,12 @@
+// RUN: %clang_cc1 -o - -emit-interface-stubs %s | FileCheck %s
+
+// CHECK:      --- !experimental-ifs-v1
+// CHECK-NEXT: IfsVersion: 1.0
+// CHECK-NEXT: Triple:
+// CHECK-NEXT: ObjectFileFormat: ELF
+// CHECK-NEXT: Symbols:
+// CHECK-NEXT: ...
+
+// UnresolvedUsingTypenameDecl
+template<typename T> class C1 { using ReprType = unsigned; };
+template<typename T> class C2 : public C1<T> { using typename C1<T>::Repr; };