libcxxabi/src/demangle/StringViewExtras.h

   1 //===--- StringViewExtras.h -------------------------------------*- C++ -*-===//
   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 // There are two copies of this file in the source tree.  The one under
  10 // libcxxabi is the original and the one under llvm is the copy.  Use
  11 // cp-to-llvm.sh to update the copy.  See README.txt for more details.
  12 //
  13 //===----------------------------------------------------------------------===//
  14
  15 #ifndef DEMANGLE_STRINGVIEW_H
  16 #define DEMANGLE_STRINGVIEW_H
  17
  18 #include "DemangleConfig.h"
  19
  20 #include <string_view>
  21
  22 DEMANGLE_NAMESPACE_BEGIN
  23
  24 inline bool starts_with(std::string_view self, char C) noexcept {
  25   return !self.empty() && *self.begin() == C;
  26 }
  27
  28 inline bool starts_with(std::string_view haystack,
  29                         std::string_view needle) noexcept {
  30   if (needle.size() > haystack.size())
  31     return false;
  32   haystack.remove_suffix(haystack.size() - needle.size());
  33   return haystack == needle;
  34 }
  35
  36 DEMANGLE_NAMESPACE_END
  37
  38 #endif