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// Copyright (C) 2020 The Qt Company Ltd.
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR LGPL-3.0-only OR GPL-2.0-only OR GPL-3.0-only
#ifndef DUMPER_H
#define DUMPER_H
//
// W A R N I N G
// -------------
//
// This file is not part of the Qt API. It exists purely as an
// implementation detail. This header file may change from version to
// version without notice, or even be removed.
//
// We mean it.
//
#include "qqmldom_global.h"
#include "qqmldomconstants_p.h"
#include "qqmldomfunctionref_p.h"
#include <QtCore/QString>
#include <QtCore/QStringView>
#include <QtCore/QDebug>
#include <type_traits>
QT_BEGIN_NAMESPACE
namespace QQmlJS {
namespace Dom {
using Sink = function_ref<void(QStringView)>;
using SinkF = std::function<void(QStringView)>;
using DumperFunction = std::function<void(const Sink &)>;
class Dumper{
public:
DumperFunction dumper;
private:
// We want to avoid the limit of one user conversion:
// after doing (* -> QStringView) we cannot have QStringView -> Dumper, as it
// would be the second user defined conversion.
// For a similar reason we have a template to accept function_ref<void(Sink)> .
// The end result is that void f(Dumper) can be called nicely, and avoid overloads:
// f(u"bla"), f(QLatin1String("bla")), f(QString()), f([](const Sink &s){...}),...
template <typename T>
using if_compatible_dumper = typename
std::enable_if<std::is_convertible<T, DumperFunction>::value, bool>::type;
template<typename T>
using if_string_view_convertible = typename
std::enable_if<std::is_convertible_v<T, QStringView>, bool>::type;
public:
Dumper(QStringView s):
dumper([s](const Sink &sink){ sink(s); }) {}
Dumper(std::nullptr_t): Dumper(QStringView(nullptr)) {}
template <typename Stringy, if_string_view_convertible<Stringy> = true>
Dumper(Stringy string):
Dumper(QStringView(string)) {}
template <typename U, if_compatible_dumper<U> = true>
Dumper(U f): dumper(std::move(f)) {}
void operator()(const Sink &s) const { dumper(s); }
};
template <typename T>
void sinkInt(const Sink &s, T i) {
const int BUFSIZE = 42; // safe up to 128 bits
QChar buf[BUFSIZE];
int ibuf = BUFSIZE;
buf[--ibuf] = QChar(0);
bool neg = false;
if (i < 0)
neg=true;
int digit = i % 10;
i = i / 10;
if constexpr (std::is_signed_v<T>) {
if (neg) { // we change the sign here because -numeric_limits<T>::min() == numeric_limits<T>::min()
i = -i;
digit = - digit;
}
}
buf[--ibuf] = QChar::fromLatin1('0' + digit);
while (i > 0 && ibuf > 0) {
digit = i % 10;
buf[--ibuf] = QChar::fromLatin1('0' + digit);
i = i / 10;
}
if (neg && ibuf > 0)
buf[--ibuf] = QChar::fromLatin1('-');
s(QStringView(&buf[ibuf], BUFSIZE - ibuf -1));
}
QMLDOM_EXPORT QString dumperToString(const Dumper &writer);
QMLDOM_EXPORT void sinkEscaped(const Sink &sink, QStringView s,
EscapeOptions options = EscapeOptions::OuterQuotes);
inline void devNull(QStringView) {}
QMLDOM_EXPORT void sinkIndent(const Sink &s, int indent);
QMLDOM_EXPORT void sinkNewline(const Sink &s, int indent = 0);
QMLDOM_EXPORT void dumpErrorLevel(const Sink &s, ErrorLevel level);
QMLDOM_EXPORT void dumperToQDebug(const Dumper &dumper, QDebug debug);
QMLDOM_EXPORT void dumperToQDebug(const Dumper &dumper, ErrorLevel level = ErrorLevel::Debug);
QMLDOM_EXPORT QDebug operator<<(QDebug d, const Dumper &dumper);
} // end namespace Dom
} // end namespace QQmlJS
QT_END_NAMESPACE
#endif // DUMPER_H
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