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
22DEMANGLE_NAMESPACE_BEGIN
23
24inline bool starts_with(std::string_view self, char C) noexcept {
25  return !self.empty() && *self.begin() == C;
26}
27
28inline 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
36DEMANGLE_NAMESPACE_END
37
38#endif