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// Copyright (C) 2016 The Qt Company Ltd.
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR GPL-3.0-only WITH Qt-GPL-exception-1.0
#ifndef PARSER_H
#define PARSER_H
#include "symbols.h"
#include <QtCore/qbytearrayview.h>
#include <stack>
QT_BEGIN_NAMESPACE
class Parser
{
public:
Parser():index(0), displayWarnings(true), displayNotes(true) {}
Symbols symbols;
qsizetype index;
bool displayWarnings;
bool displayNotes;
struct IncludePath
{
inline explicit IncludePath(const QByteArray &_path)
: path(_path), isFrameworkPath(false) {}
QByteArray path;
bool isFrameworkPath;
};
QList<IncludePath> includes;
std::stack<QByteArray, QByteArrayList> currentFilenames;
inline bool hasNext() const { return (index < symbols.size()); }
inline Token next() { if (index >= symbols.size()) return NOTOKEN; return symbols.at(index++).token; }
inline Token peek() { if (index >= symbols.size()) return NOTOKEN; return symbols.at(index).token; }
bool test(Token);
void next(Token);
void next(Token, const char *msg);
inline void prev() {--index;}
inline Token lookup(int k = 1);
inline const Symbol &symbol_lookup(int k = 1) { return symbols.at(index-1+k);}
inline Token token() { return symbols.at(index-1).token;}
inline QByteArray lexem() { return symbols.at(index-1).lexem();}
inline QByteArray unquotedLexem() { return symbols.at(index-1).unquotedLexem();}
inline const Symbol &symbol() { return symbols.at(index-1);}
inline const Symbol &symbolAt(qsizetype idx) { return symbols.at(idx); }
Q_NORETURN void error(const Symbol &symbol);
Q_NORETURN void error(const char *msg = nullptr);
void warning(const char * = nullptr);
void warning(const Symbol &sym, QByteArrayView msg);
void note(const char * = nullptr);
void defaultErrorMsg(const Symbol &sym);
void printMsg(QByteArrayView formatStringSuffix, QByteArrayView msg, const Symbol &sym);
};
inline bool Parser::test(Token token)
{
if (index < symbols.size() && symbols.at(index).token == token) {
++index;
return true;
}
return false;
}
inline Token Parser::lookup(int k)
{
const qsizetype l = index - 1 + k;
return l < symbols.size() ? symbols.at(l).token : NOTOKEN;
}
inline void Parser::next(Token token)
{
if (!test(token))
error();
}
inline void Parser::next(Token token, const char *msg)
{
if (!test(token))
error(msg);
}
QT_END_NAMESPACE
#endif
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