want bool
	}{
		{"Empty", "", false},
		{"Space", " ", false},
		{"SpaceSuffix", "foo ", false},
		{"Number", "123", false},
		{"Keyword", "func", false},

		{"LettersASCII", "foo", true},
		{"MixedASCII", "_bar123", true},
		{"UppercaseKeyword", "Func", true},
		{"LettersUnicode", "fóö", true},
	}
	for _, test := range tests {
		t.Run(test.name, func(t *testing.T) {
			if got := IsIdentifier(test.in); got != test.want {

}

TEST(ValidateCppIdent, Simple) {
  TF_EXPECT_OK(ValidateCppIdent("a", ""));
  TF_EXPECT_OK(ValidateCppIdent("abc", ""));
  TF_EXPECT_OK(ValidateCppIdent("_abc", ""));
  TF_EXPECT_OK(ValidateCppIdent("_abc123", ""));
  // Make sure we didn't skip a valid letter or digit
  string ident;
  for (char c = 'a'; c <= 'z'; c++) {
    ident.append(1, c);
  }
  for (char c = 'A'; c <= 'Z'; c++) {
    ident.append(1, c);
  }

	{Comment, "/*" + f100 + "*/"},

	{Comment, "// identifiers"},
	{Ident, "a"},
	{Ident, "a0"},
	{Ident, "foobar"},
	{Ident, "abc123"},
	{Ident, "LGTM"},
	{Ident, "_"},
	{Ident, "_abc123"},
	{Ident, "abc123_"},
	{Ident, "_abc_123_"},
	{Ident, "_äöü"},
	{Ident, "_本"},
	{Ident, "äöü"},
	{Ident, "本"},
	{Ident, "a۰۱۸"},
	{Ident, "foo६४"},
	{Ident, "bar９８７６"},
	{Ident, f100},