From 1a9b9adf6ff83d48a797f20cc607be9c5eb154c6 Mon Sep 17 00:00:00 2001
From: Richard Smith <richard-llvm@metafoo.co.uk>
Date: Fri, 22 Jul 2016 23:36:59 +0000
Subject: P0217R3: Parsing support and framework for AST representation of
 C++1z decomposition declarations.

There are a couple of things in the wording that seem strange here:
decomposition declarations are permitted at namespace scope (which we partially
support here) and they are permitted as the declaration in a template (which we
reject).


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@276492 91177308-0d34-0410-b5e6-96231b3b80d8
---
 lib/AST/DeclCXX.cpp | 38 ++++++++++++++++++++++++++++++++++++++
 1 file changed, 38 insertions(+)

(limited to 'lib/AST/DeclCXX.cpp')

diff --git a/lib/AST/DeclCXX.cpp b/lib/AST/DeclCXX.cpp
index d069bfdc3d..7e6c725348 100644
--- a/lib/AST/DeclCXX.cpp
+++ b/lib/AST/DeclCXX.cpp
@@ -2306,6 +2306,44 @@ StaticAssertDecl *StaticAssertDecl::CreateDeserialized(ASTContext &C,
                                       nullptr, SourceLocation(), false);
 }
 
+void BindingDecl::anchor() {}
+
+BindingDecl *BindingDecl::Create(ASTContext &C, DeclContext *DC,
+                                 SourceLocation IdLoc, IdentifierInfo *Id) {
+  return new (C, DC) BindingDecl(DC, IdLoc, Id);
+}
+
+BindingDecl *BindingDecl::CreateDeserialized(ASTContext &C, unsigned ID) {
+  return new (C, ID) BindingDecl(nullptr, SourceLocation(), nullptr);
+}
+
+void DecompositionDecl::anchor() {}
+
+DecompositionDecl *DecompositionDecl::Create(ASTContext &C, DeclContext *DC,
+                                             SourceLocation StartLoc,
+                                             SourceLocation LSquareLoc,
+                                             QualType T, TypeSourceInfo *TInfo,
+                                             StorageClass SC,
+                                             ArrayRef<BindingDecl *> Bindings) {
+  size_t Extra = additionalSizeToAlloc<BindingDecl *>(Bindings.size());
+  return new (C, DC, Extra)
+      DecompositionDecl(C, DC, StartLoc, LSquareLoc, T, TInfo, SC, Bindings);
+}
+
+DecompositionDecl *DecompositionDecl::CreateDeserialized(ASTContext &C,
+                                                         unsigned ID,
+                                                         unsigned NumBindings) {
+  size_t Extra = additionalSizeToAlloc<BindingDecl *>(NumBindings);
+  auto *Result = new (C, ID, Extra) DecompositionDecl(
+      C, nullptr, SourceLocation(), SourceLocation(), QualType(), nullptr, StorageClass(), None);
+  // Set up and clean out the bindings array.
+  Result->NumBindings = NumBindings;
+  auto *Trail = Result->getTrailingObjects<BindingDecl *>();
+  for (unsigned I = 0; I != NumBindings; ++I)
+    new (Trail + I) BindingDecl*(nullptr);
+  return Result;
+}
+
 MSPropertyDecl *MSPropertyDecl::Create(ASTContext &C, DeclContext *DC,
                                        SourceLocation L, DeclarationName N,
                                        QualType T, TypeSourceInfo *TInfo,
-- 
cgit v1.2.3