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contrib/libs/antlr4_cpp_runtime/src/tree/ParseTreeWalker.cpp
48 строк
1 KB
Anton Myagkov
Update ydb version to 24.4 (#4579)
07 фев 2026, 11:59
Не верифицирован
07 фев 2026, 11:59
2c21cae
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/* 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 "tree/ErrorNode.h" #include "ParserRuleContext.h" #include "tree/ParseTreeListener.h" #include "support/CPPUtils.h" #include "support/Casts.h" #include "tree/IterativeParseTreeWalker.h" #include "tree/ParseTreeWalker.h" using namespace antlr4::tree; using namespace antlrcpp; static IterativeParseTreeWalker defaultWalker; ParseTreeWalker &ParseTreeWalker::DEFAULT = defaultWalker; void ParseTreeWalker::walk(ParseTreeListener *listener, ParseTree *t) const { if (ErrorNode::is(*t)) { listener->visitErrorNode(downCast<ErrorNode*>(t)); return; } if (TerminalNode::is(*t)) { listener->visitTerminal(downCast<TerminalNode*>(t)); return; } enterRule(listener, t); for (auto &child : t->children) { walk(listener, child); } exitRule(listener, t); } void ParseTreeWalker::enterRule(ParseTreeListener *listener, ParseTree *r) const { auto *ctx = downCast<ParserRuleContext*>(r); listener->enterEveryRule(ctx); ctx->enterRule(listener); } void ParseTreeWalker::exitRule(ParseTreeListener *listener, ParseTree *r) const { auto *ctx = downCast<ParserRuleContext*>(r); ctx->exitRule(listener); listener->exitEveryRule(ctx); }