libcxx/test/std/input.output/iostreams.base/ios.base/fmtflags.state/precision_streamsize.pass.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 // <ios>
  10
  11 // class ios_base
  12
  13 // streamsize precision(streamsize prec);
  14
  15 #include <ios>
  16 #include <cassert>
  17
  18 #include "test_macros.h"
  19
  20 class test
  21     : public std::ios
  22 {
  23 public:
  24     test()
  25     {
  26         init(0);
  27     }
  28 };
  29
  30 int main(int, char**)
  31 {
  32     test t;
  33     assert(t.precision() == 6);
  34     std::streamsize p = t.precision(10);
  35     assert(p == 6);
  36     assert(t.precision() == 10);
  37
  38   return 0;
  39 }