161     assert_err!(FloatLit, "", Empty, None);  in parse_err()
167     assert_err!(FloatLit, "0e", NoExponentDigits, 1..2);  in parse_err()
179     assert_err!(FloatLit, "1e", NoExponentDigits, 1..2);  in parse_err()
180     assert_err!(FloatLit, "1.e4", UnexpectedChar, 2);  in parse_err()
181     assert_err!(FloatLit, "3._4", UnexpectedChar, 2);  in parse_err()
182     assert_err!(FloatLit, "12345._987", UnexpectedChar, 6);  in parse_err()
183     assert_err!(FloatLit, "46._", UnexpectedChar, 3);  in parse_err()
184     assert_err!(FloatLit, "46.f32", UnexpectedChar, 3);  in parse_err()
185     assert_err!(FloatLit, "46.e3", UnexpectedChar, 3);  in parse_err()
186     assert_err!(FloatLit, "46._e3", UnexpectedChar, 3);  in parse_err()
187     assert_err!(FloatLit, "46.e3f64", UnexpectedChar, 3);  in parse_err()
188     assert_err!(FloatLit, "23.4e_", NoExponentDigits, 4..6);  in parse_err()
189     assert_err!(FloatLit, "23E___f32", NoExponentDigits, 2..6);  in parse_err()
190     assert_err!(FloatLit, "7f23", InvalidFloatTypeSuffix, 1..4);  in parse_err()
191     assert_err!(FloatLit, "7f320", InvalidFloatTypeSuffix, 1..5);  in parse_err()
192     assert_err!(FloatLit, "7f64_", InvalidFloatTypeSuffix, 1..5);  in parse_err()
193     assert_err!(FloatLit, "8f649", InvalidFloatTypeSuffix, 1..5);  in parse_err()
194     assert_err!(FloatLit, "8f64f32", InvalidFloatTypeSuffix, 1..7);  in parse_err()
195     assert_err!(FloatLit, "55e3.1", InvalidFloatTypeSuffix, 4..6);  // suboptimal  in parse_err()
197     assert_err!(FloatLit, "3.7+", InvalidFloatTypeSuffix, 3..4);  in parse_err()
198     assert_err!(FloatLit, "3.7+2", InvalidFloatTypeSuffix, 3..5);  in parse_err()
199     assert_err!(FloatLit, "3.7-", InvalidFloatTypeSuffix, 3..4);  in parse_err()
200     assert_err!(FloatLit, "3.7-2", InvalidFloatTypeSuffix, 3..5);  in parse_err()
201     assert_err!(FloatLit, "3.7e+", NoExponentDigits, 3..5);  in parse_err()
202     assert_err!(FloatLit, "3.7e-", NoExponentDigits, 3..5);  in parse_err()
203     assert_err!(FloatLit, "3.7e-+3", NoExponentDigits, 3..5);  // suboptimal  in parse_err()
204     assert_err!(FloatLit, "3.7e+-3", NoExponentDigits, 3..5);  // suboptimal  in parse_err()