Outline view flattens symbols inside `operator""` (user-defined literal) function

[sean-mcmanus]

Discussed in #14019

^{Originally posted by coshz October 26, 2025}
I've noticed that VS Code outline view treats symbols inside user-defined literal function, instead of operator"" itself, as top-level symbols. Example code:

void operator""_T(const char* str, size_t n)
{
    auto foo = [](auto s) { return s; };
    std::string var_1 = std::string(str,n);
    foo(var_1);
    std::string var_2 = foo(var_1);
}

The outline view behavior (sort by position):

• observed: var_1, foo, var_2;
• expected: operator""_T(const char*, size_t).

Is this a known limitation of the symbol parser for user-defined literals?

[sean-mcmanus]

I filed a bug against our shared VS tag parser at https://developercommunity.visualstudio.com/t/C-operator_T-has-its-definition-tag/11036529 . I tried to make it publicly visible but it gave me an error so I'm not sure if it worked.