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#pragma once
#include <yql/essentials/parser/proto_ast/common.h>
#include <contrib/libs/antlr3_cpp_runtime/include/antlr3.hpp>
namespace NProtoAST {
template <typename TParser, typename TLexer>
class TProtoASTBuilder3 {
typedef ANTLR_UINT8 TChar;
public:
TProtoASTBuilder3(TStringBuf data, const TString& queryName = "query", google::protobuf::Arena* arena = nullptr)
: QueryName(queryName)
, InputStream((const TChar*)data.data(), antlr3::ENC_8BIT, data.length(), (TChar*)QueryName.begin()) // Why the hell antlr needs non-const ptr??
, Lexer(&InputStream, static_cast<google::protobuf::Arena*>(nullptr))
, TokenStream(ANTLR_SIZE_HINT, Lexer.get_tokSource())
, Parser(&TokenStream, arena)
{
}
google::protobuf::Message* BuildAST(IErrorCollector& errors) {
// TODO: find a better way to break on lexer errors
try {
Lexer.ReportErrors(&errors);
return Parser.Parse(Lexer, &errors);
} catch (const TTooManyErrors&) {
return nullptr;
} catch (...) {
errors.Error(0, 0, CurrentExceptionMessage());
return nullptr;
}
}
private:
TString QueryName;
typename TLexer::InputStreamType InputStream;
TLexer Lexer;
typename TParser::TokenStreamType TokenStream;
TParser Parser;
};
template <typename TLexer>
class TLexerTokensCollector3 {
typedef ANTLR_UINT8 TChar;
public:
TLexerTokensCollector3(TStringBuf data, const char** tokenNames, const TString& queryName = "query")
: TokenNames(tokenNames)
, QueryName(queryName)
, InputStream((const TChar*)data.data(), antlr3::ENC_8BIT, data.length(), (TChar*)QueryName.begin())
, Lexer(&InputStream, static_cast<google::protobuf::Arena*>(nullptr))
{
}
void CollectTokens(IErrorCollector& errors, const NSQLTranslation::ILexer::TTokenCallback& onNextToken) {
try {
Lexer.ReportErrors(&errors);
auto src = Lexer.get_tokSource();
for (;;) {
auto token = src->nextToken();
auto type = token->getType();
const bool isEOF = type == TLexer::CommonTokenType::TOKEN_EOF;
NSQLTranslation::TParsedToken last;
last.Name = isEOF ? "EOF" : TokenNames[type];
last.Content = token->getText();
last.Line = token->get_line();
last.LinePos = token->get_charPositionInLine();
onNextToken(std::move(last));
if (isEOF) {
break;
}
}
} catch (const TTooManyErrors&) {
} catch (...) {
errors.Error(0, 0, CurrentExceptionMessage());
}
}
private:
const char** TokenNames;
TString QueryName;
typename TLexer::InputStreamType InputStream;
TLexer Lexer;
};
} // namespace NProtoAST
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