[LLVMbugs] [Bug 8841] New: Spurious "unused function" diagnostic with inline friend definition

[bugzilla-daemon at llvm.org]

http://llvm.org/bugs/show_bug.cgi?id=8841

           Summary: Spurious "unused function" diagnostic with inline
                    friend definition
           Product: clang
           Version: trunk
          Platform: PC
        OS/Version: All
            Status: NEW
          Severity: normal
          Priority: P
         Component: C++
        AssignedTo: unassignedclangbugs at nondot.org
        ReportedBy: dgregor at apple.com
                CC: llvmbugs at cs.uiuc.edu, dgregor at apple.com


Compiling the attached source with 

  clang++ -Wunused excess-warning.ii

produces the spurious warnings:


/Volumes/Data/dgregor/Projects/llvm/tools/clang/lib/Sema/TreeTransform.h:3630:17:
warning: 
      unused function 'operator==' [-Wunused-function]
    friend bool operator==(const TemplateArgumentLocContainerIterator &X,
                ^
/Volumes/Data/dgregor/Projects/llvm/tools/clang/lib/Sema/TreeTransform.h:3635:17:
warning: 
      unused function 'operator!=' [-Wunused-function]
    friend bool operator!=(const TemplateArgumentLocContainerIterator &X,
                ^

In general, we probably shouldn't warn about inline friend definitions.

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