diff options
author | Nick Desaulniers <ndesaulniers@google.com> | 2023-04-20 10:02:28 -0700 |
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committer | Nick Desaulniers <ndesaulniers@google.com> | 2023-04-20 10:02:32 -0700 |
commit | 691c4800be8018d8ad03f0e25be3672acbdfe403 (patch) | |
tree | 30265c8249de68e6db65fd5967eefc3ef1f8a722 /libcxxabi | |
parent | 328cfa840d791deeed84aa4e2fda93d591bfb8d7 (diff) | |
download | llvm-691c4800be8018d8ad03f0e25be3672acbdfe403.tar.gz |
[libcxxabi][demangle] create helper for std::string_view::starts_with
Add C++ 20 style starts_with to replace StringView::startsWith in
LLVMDemangle. Due to library layering (LLVMSupport depends on
LLVMDemangle), we add the utility header under llvm/Demangle, instead of
llvm/ADT or llvm/Support.
Modify this in libcxxabi, then copy this over to llvm.
Reviewed By: MaskRay, #libc_abi, phosek
Differential Revision: https://reviews.llvm.org/D148556
Diffstat (limited to 'libcxxabi')
-rw-r--r-- | libcxxabi/src/demangle/StringViewExtras.h | 34 | ||||
-rwxr-xr-x | libcxxabi/src/demangle/cp-to-llvm.sh | 2 |
2 files changed, 35 insertions, 1 deletions
diff --git a/libcxxabi/src/demangle/StringViewExtras.h b/libcxxabi/src/demangle/StringViewExtras.h new file mode 100644 index 000000000000..d430e67ea3cb --- /dev/null +++ b/libcxxabi/src/demangle/StringViewExtras.h @@ -0,0 +1,34 @@ +//===--- StringViewExtras.h -------------------------------------*- C++ -*-===// +// +// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. +// See https://llvm.org/LICENSE.txt for license information. +// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception +// +//===----------------------------------------------------------------------===// +// +// There are two copies of this file in the source tree. The one under +// libcxxabi is the original and the one under llvm is the copy. Use +// cp-to-llvm.sh to update the copy. See README.txt for more details. +// +//===----------------------------------------------------------------------===// + +#ifndef DEMANGLE_STRINGVIEW_H +#define DEMANGLE_STRINGVIEW_H + +#include "DemangleConfig.h" + +#include <string_view> + +DEMANGLE_NAMESPACE_BEGIN + +inline bool starts_with(std::string_view self, char C) { + return !self.empty() && self.front() == C; +} + +inline bool starts_with(std::string_view haystack, std::string_view needle) { + return haystack.substr(0, needle.size()) == needle; +} + +DEMANGLE_NAMESPACE_END + +#endif diff --git a/libcxxabi/src/demangle/cp-to-llvm.sh b/libcxxabi/src/demangle/cp-to-llvm.sh index d1474655b1c3..870b6dad9ac8 100755 --- a/libcxxabi/src/demangle/cp-to-llvm.sh +++ b/libcxxabi/src/demangle/cp-to-llvm.sh @@ -6,7 +6,7 @@ set -e cd $(dirname $0) -HDRS="ItaniumDemangle.h ItaniumNodes.def StringView.h Utility.h" +HDRS="ItaniumDemangle.h ItaniumNodes.def StringView.h StringViewExtras.h Utility.h" LLVM_DEMANGLE_DIR=$1 if [[ -z "$LLVM_DEMANGLE_DIR" ]]; then |