[llvm-bugs] [Bug 51327] New: Range based for loop not working if range's type is a template.

[via llvm-bugs]

https://bugs.llvm.org/show_bug.cgi?id=51327

            Bug ID: 51327
           Summary: Range based for loop not working if range's type is a
                    template.
           Product: OpenMP
           Version: unspecified
          Hardware: PC
                OS: Linux
            Status: NEW
          Severity: enhancement
          Priority: P
         Component: Clang Compiler Support
          Assignee: unassignedclangbugs at nondot.org
          Reporter: northon_patrick3 at yahoo.ca
                CC: llvm-bugs at lists.llvm.org

Example:

void do_loop(const auto &v)
{
        #pragma omp parallel for
        for(const auto &i : v){
                std::cout << i << '\n';
        }
}

Result in error:

error: initialization clause of OpenMP for loop is not in canonical form ('var
= init' or 'T var = init')
        for(const auto &i : v){
        ^

Change `const auto &v` to say, `const std::vector<int> &v` and it work. I don't
know what the standard say about this case but it work under gcc and it would
also be very useful.

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