Unicode/special characters in variable names in cl

问题:

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clang now (>3.3) supports unicode characters in variable names http://llvm.org/releases/3.3/tools/clang/docs/ReleaseNotes.html#major-new-features.

However some special character are still forbiden.

int main(){
    double α = 2.; // alpha, ok!
    double ∞ = 99999.; // infinity, error
}

giving:

error: non-ASCII characters are not allowed outside of literals and identifiers
        double ∞ = 99999.;

What is the fundamental difference between α (alpha) and ∞ (infinty) for clang? That the former is unicode and the latter is not unicode but at the same time is not ASCII?

Is there a workaround or an option to allow this set of characters in clang (or BTW in gcc)?

Notes: 1) ∞ is just an example, there are a lot of characters that are potentially useful but also forbidden, like ∫ or ∂. 2) I am not asking if it is good idea, please take it as a technical question. 3) I am interested in C++ compiler of clang 3.4 in Linux (gcc 4.8.3 doesn't support this). I am saving the source files with gedit using UTF-8 encoding and Unix/Linux line ending. 4) adding other normal first characters doesn't help: _∞

---

The answers point to a definite NO. Some ranges are indeed not allowed nor will they be soon. To move one step further to total craziness, the best alternative I found was to use characters that effectively look the same. (Now, this I might admit is not a good idea.) Those alternatives can be found here http://shapecatcher.com/. The result (sorry if it hurts your eyes):

//    double ∞ = 99999.; // still error
//    double ⧞ = 99999.; // infinity negated still error
  double ꝏ = 99999.; // letter oo
  double Ꝏ = 99999.; // letter OO
//    double ⧜ = 99999.; // incomplete infinity still error

Other "alternative" dead ringers mentioned in the question that are in the allowed range: ʃ,