mirror of
https://github.com/c64scene-ar/llvm-6502.git
synced 2024-11-01 15:11:24 +00:00
dfe91cefd2
- The previous implementation always constructed the StringMap entry, even if the key was present in the set. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@177178 91177308-0d34-0410-b5e6-96231b3b80d8
46 lines
1.5 KiB
C++
46 lines
1.5 KiB
C++
//===--- StringSet.h - The LLVM Compiler Driver -----------------*- C++ -*-===//
|
|
//
|
|
// The LLVM Compiler Infrastructure
|
|
//
|
|
// This file is distributed under the University of Illinois Open
|
|
// Source License. See LICENSE.TXT for details.
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
//
|
|
// StringSet - A set-like wrapper for the StringMap.
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
#ifndef LLVM_ADT_STRINGSET_H
|
|
#define LLVM_ADT_STRINGSET_H
|
|
|
|
#include "llvm/ADT/StringMap.h"
|
|
|
|
namespace llvm {
|
|
|
|
/// StringSet - A wrapper for StringMap that provides set-like functionality.
|
|
template <class AllocatorTy = llvm::MallocAllocator>
|
|
class StringSet : public llvm::StringMap<char, AllocatorTy> {
|
|
typedef llvm::StringMap<char, AllocatorTy> base;
|
|
public:
|
|
|
|
/// insert - Insert the specified key into the set. If the key already
|
|
/// exists in the set, return false and ignore the request, otherwise insert
|
|
/// it and return true.
|
|
bool insert(StringRef Key) {
|
|
// Get or create the map entry for the key; if it doesn't exist the value
|
|
// type will be default constructed which we use to detect insert.
|
|
//
|
|
// We use '+' as the sentinel value in the map.
|
|
assert(!Key.empty());
|
|
StringMapEntry<char> &Entry = this->GetOrCreateValue(Key);
|
|
if (Entry.getValue() == '+')
|
|
return false;
|
|
Entry.setValue('+');
|
|
return true;
|
|
}
|
|
};
|
|
}
|
|
|
|
#endif // LLVM_ADT_STRINGSET_H
|