libcxx/test/std/numerics/c.math/abs.verify.cpp

   1 //===----------------------------------------------------------------------===//
   2 //
   3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
   4 // See https://llvm.org/LICENSE.txt for license information.
   5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
   6 //
   7 //===----------------------------------------------------------------------===//
   8
   9 #include <cmath>
  10
  11 void f() {
  12     unsigned int ui = -5;
  13     (void)std::abs(ui); // expected-error {{call to 'abs' is ambiguous}}
  14
  15     unsigned char uc = -5;
  16     (void)std::abs(uc); // expected-warning {{taking the absolute value of unsigned type 'unsigned char' has no effect}}
  17
  18     unsigned short us = -5;
  19     (void)std::abs(us); // expected-warning {{taking the absolute value of unsigned type 'unsigned short' has no effect}}
  20
  21     unsigned long ul = -5;
  22     (void)std::abs(ul); // expected-error {{call to 'abs' is ambiguous}}
  23
  24     unsigned long long ull = -5;
  25     (void)std::abs(ull); // expected-error {{call to 'abs' is ambiguous}}
  26 }