blob: 114863702c93c06dd881488dca9a47c8f7478b4c (
plain) (
blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
|
/* Copyright (c) 2012-2017 The ANTLR Project. All rights reserved.
* Use of this file is governed by the BSD 3-clause license that
* can be found in the LICENSE.txt file in the project root.
*/
#include "misc/MurmurHash.h"
#include "Lexer.h"
#include "support/CPPUtils.h"
#include "support/Casts.h"
#include "atn/LexerIndexedCustomAction.h"
using namespace antlr4;
using namespace antlr4::atn;
using namespace antlr4::misc;
using namespace antlrcpp;
namespace {
bool cachedHashCodeEqual(size_t lhs, size_t rhs) {
return lhs == rhs || lhs == 0 || rhs == 0;
}
}
LexerIndexedCustomAction::LexerIndexedCustomAction(int offset, Ref<const LexerAction> action)
: LexerAction(LexerActionType::INDEXED_CUSTOM, true), _action(std::move(action)), _offset(offset) {}
void LexerIndexedCustomAction::execute(Lexer *lexer) const {
// assume the input stream position was properly set by the calling code
getAction()->execute(lexer);
}
size_t LexerIndexedCustomAction::hashCodeImpl() const {
size_t hash = MurmurHash::initialize();
hash = MurmurHash::update(hash, static_cast<size_t>(getActionType()));
hash = MurmurHash::update(hash, getOffset());
hash = MurmurHash::update(hash, getAction());
return MurmurHash::finish(hash, 3);
}
bool LexerIndexedCustomAction::equals(const LexerAction &other) const {
if (this == std::addressof(other)) {
return true;
}
if (getActionType() != other.getActionType()) {
return false;
}
const auto &lexerAction = downCast<const LexerIndexedCustomAction&>(other);
return getOffset() == lexerAction.getOffset() &&
cachedHashCodeEqual(cachedHashCode(), lexerAction.cachedHashCode()) &&
*getAction() == *lexerAction.getAction();
}
std::string LexerIndexedCustomAction::toString() const {
return "indexedCustom(" + std::to_string(getOffset()) + ", " + getAction()->toString() + ")";
}
|
