[LLVMbugs] [Bug 18411] New: Alias template is incorrectly treated as a different template when used with as a template template parameter

[bugzilla-daemon at llvm.org]

http://llvm.org/bugs/show_bug.cgi?id=18411

            Bug ID: 18411
           Summary: Alias template is incorrectly treated as a different
                    template when used with as a template template
                    parameter
           Product: clang
           Version: trunk
          Hardware: PC
                OS: Linux
            Status: NEW
          Severity: normal
          Priority: P
         Component: -New Bugs
          Assignee: unassignedclangbugs at nondot.org
          Reporter: ken at fsfoundry.org
                CC: llvmbugs at cs.uiuc.edu
    Classification: Unclassified

As I was explaining bug #18408 to my colleague, I realized there was another
bug.

template <template <typename> class A>
struct TemplateTakingTemplateTemplateParameter {};

template <typename B>
class GlobalTemplate {};

template <typename B>
using AliasToGlobalTemplate = GlobalTemplate<B>;

void foo(GlobalTemplate) {}
/*
void foo(AliasToGlobalTemplate) {} // Error: Redefine!
*/

void foo(TemplateTakingTemplateTemplateParameter<GlobalTemplate>) {}
void foo(TemplateTakingTemplateTemplateParameter<AliasToGlobalTemplate>) {} //
Compiles, but it shouldn't

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