mgehre added inline comments.
================
Comment at: lib/AST/ASTContext.cpp:4456
@@ +4455,3 @@
+ // the template parameter and not an expression involving the template
parameter.
+ auto *E = Arg.getAsExpr()->IgnoreImpCasts();
+ while(auto *DeclRef = dyn_cast_or_null<DeclRefExpr>(E)) {
----------------
aaron.ballman wrote:
> `const auto *` (and propagate it to other declarations)?
Unfortunately, the TemplateArgument constructor in
```
return TemplateArgument(DeclRef);
```
takes a Expr* (and not a const Expr*).
https://reviews.llvm.org/D22587
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