[PATCH] D131858: [clang] Track the templated entity in type substitution.

[David Rector via Phabricator via cfe-commits]

davrec added a comment.

I like the late changes, just need to add comments to the public methods, and maybe move `getReplacedTemplateParameterList` over to `Decl`.



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Comment at: clang/include/clang/AST/DeclTemplate.h:3427
 
+TemplateParameterList *getReplacedTemplateParameterList(Decl *D);
+
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I don't object with making this public, and I can see the argument for making this its own function rather than a Decl method all things being equal, but given that we already have `Decl::getDescribedTemplateParams`, I think that 
# this should probably also go in Decl,
# a good comment is needed explaining the difference between the two (e.g. that the `D` is the template/template-like decl itself, not a templated decl as required by `getDescribedTemplateParams`, or whatever), and what happens when it is called on a non-template decl, and
# it probably should be named just `getTemplateParams` or something that suggests its difference with `getDescribedTemplateParams`.



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Comment at: clang/include/clang/AST/ExprCXX.h:4307
 
-  NonTypeTemplateParmDecl *getParameter() const {
-    return ParamAndRef.getPointer();
+  Decl *getAssociatedDecl() const { return AssociatedDeclAndRef.getPointer(); }
+
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Add comment


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Comment at: clang/include/clang/AST/ExprCXX.h:4321
+
+  bool isReferenceParameter() const { return AssociatedDeclAndRef.getInt(); }
 
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(Not your responsibility but while you're adding comments maybe you could add one for this too.)


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Comment at: clang/include/clang/AST/ExprCXX.h:4378-4380
+  Decl *getAssociatedDecl() const { return AssociatedDecl; }
+
+  unsigned getIndex() const { return Index; }
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Comment at: clang/include/clang/AST/TemplateName.h:153-154
+
+  Decl *getAssociatedDecl() const { return AssociatedDecl; }
+  unsigned getIndex() const { return Bits.Index; }
 
----------------
Add comments


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Comment at: clang/include/clang/AST/TemplateName.h:386-387
 public:
-  TemplateTemplateParmDecl *getParameter() const { return Parameter; }
+  Decl *getAssociatedDecl() const { return AssociatedDecl; }
+  unsigned getIndex() const { return Bits.Index; }
+
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Add comments


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Comment at: clang/lib/AST/DeclTemplate.cpp:1610
+  default:
+    llvm_unreachable("Unhandled templated declaration kind");
+  }
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Now that this is public, probably should return nullptr - otherwise users need the same huge switch just to decide whether they can call this function.


Repository:
  rG LLVM Github Monorepo

CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D131858/new/

https://reviews.llvm.org/D131858