[llvm-bugs] [Bug 35311] New: Constexpr constructor of templated class does not require member initialization.

[via llvm-bugs]

https://bugs.llvm.org/show_bug.cgi?id=35311

            Bug ID: 35311
           Summary: Constexpr constructor of templated class does not
                    require member initialization.
           Product: clang
           Version: unspecified
          Hardware: PC
                OS: All
            Status: NEW
          Severity: enhancement
          Priority: P
         Component: -New Bugs
          Assignee: unassignedclangbugs at nondot.org
          Reporter: chmielarz at int.pl
                CC: llvm-bugs at lists.llvm.org

The standard requires that "for the constructor of a class or struct, every
base class sub-object and every non-variant non-static data member must be
initialized."[cpprefence.com]

Clang seems to ignore that requirement if the struct is a template.
This behavior is the same regardless of the version and standard.


Minimal example:

template<typename T> // commenting out this line generates appropriate errors
struct S{
    constexpr S() /*: i(1)*/ {}
    int i;
};

constexpr S<int> s;
int main() { return s.i; }

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