[clang] Ignore inline namespace for `hasName` (#109147)

Add a new enumeration `SuppressInlineNamespaceMode` to `PrintingPolicy` that
is explicit about how to handle inline namespaces. `SuppressInlineNamespace`
uses that enumeration now instead of a Boolean value.

Specializing a template from an inline namespace should be transparent.
For instance

```
namespace foo {
    inline namespace v1 {
        template<typename A>
        void function(A&);
    }
}

namespace foo {
    template<>
    void function<int>(int&);
}
```

`hasName` should match both declarations of `foo::function`.

Makes the behavior of `matchesNodeFullSlow` and `matchesNodeFullFast`
consistent, fixing an assert inside `HasNameMatcher::matchesNode`.

1 files changed, 2 insertions, 1 deletions

diff --git a/clang/lib/CodeGen/CGDebugInfo.cpp b/clang/lib/CodeGen/CGDebugInfo.cpp
index 609957b..06015a9 100644
--- a/clang/lib/CodeGen/CGDebugInfo.cpp
+++ b/clang/lib/CodeGen/CGDebugInfo.cpp
@@ -287,7 +287,8 @@ PrintingPolicy CGDebugInfo::getPrintingPolicy() const {
     PP.SplitTemplateClosers = true;
   }
 
-  PP.SuppressInlineNamespace = false;
+  PP.SuppressInlineNamespace =
+      PrintingPolicy::SuppressInlineNamespaceMode::None;
   PP.PrintCanonicalTypes = true;
   PP.UsePreferredNames = false;
   PP.AlwaysIncludeTypeForTemplateArgument = true;