1 //===--- StringViewExtras.h ----------*- mode:c++;eval:(read-only-mode) -*-===//
2 //       Do not edit! See README.txt.
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
39