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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 "Token.h"
#include "CommonToken.h"
#include "CharStream.h"
#include "ListTokenSource.h"
using namespace antlr4;
ListTokenSource::ListTokenSource(std::vector<std::unique_ptr<Token>> tokens_) : ListTokenSource(std::move(tokens_), "") {
}
ListTokenSource::ListTokenSource(std::vector<std::unique_ptr<Token>> tokens_, const std::string &sourceName_)
: tokens(std::move(tokens_)), sourceName(sourceName_) {
InitializeInstanceFields();
if (tokens.empty()) {
throw "tokens cannot be null";
}
// Check if there is an eof token and create one if not.
if (tokens.back()->getType() != Token::EOF) {
Token *lastToken = tokens.back().get();
size_t start = INVALID_INDEX;
size_t previousStop = lastToken->getStopIndex();
if (previousStop != INVALID_INDEX) {
start = previousStop + 1;
}
size_t stop = std::max(INVALID_INDEX, start - 1);
tokens.emplace_back((_factory->create({ this, getInputStream() }, Token::EOF, "EOF",
Token::DEFAULT_CHANNEL, start, stop, static_cast<int>(lastToken->getLine()), lastToken->getCharPositionInLine())));
}
}
size_t ListTokenSource::getCharPositionInLine() {
if (i < tokens.size()) {
return tokens[i]->getCharPositionInLine();
}
return 0;
}
std::unique_ptr<Token> ListTokenSource::nextToken() {
if (i < tokens.size()) {
return std::move(tokens[i++]);
}
return nullptr;
}
size_t ListTokenSource::getLine() const {
if (i < tokens.size()) {
return tokens[i]->getLine();
}
return 1;
}
CharStream *ListTokenSource::getInputStream() {
if (i < tokens.size()) {
return tokens[i]->getInputStream();
} else if (!tokens.empty()) {
return tokens.back()->getInputStream();
}
// no input stream information is available
return nullptr;
}
std::string ListTokenSource::getSourceName() {
if (sourceName != "") {
return sourceName;
}
CharStream *inputStream = getInputStream();
if (inputStream != nullptr) {
return inputStream->getSourceName();
}
return "List";
}
TokenFactory<CommonToken>* ListTokenSource::getTokenFactory() {
return _factory;
}
void ListTokenSource::InitializeInstanceFields() {
i = 0;
_factory = CommonTokenFactory::DEFAULT.get();
}
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