assertstream.h

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/*
 * Copyright (C) 2021 Ondrej Starek
 *
 * This file is part of OTest2
 *
 * OTest2 is free software: you can redistribute it and/or modify it under
 * the terms of the GNU Lesser General Public License as published by
 * the Free Software Foundation, either version 3 of the License,
 * or (at your option) any later version.
 *
 * OTest2 is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
 * or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU Lesser General Public
 * License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public License
 * along with OTest2.  If not, see <http://www.gnu.org/licenses/>.
 */
 
#ifndef OTest2_INCLUDE_OTEST2_ASSERTSTREAM_H_
#define OTest2_INCLUDE_OTEST2_ASSERTSTREAM_H_
 
#include <assert.h>
#include <initializer_list>
#include <otest2/assertbufferptr.h>
#include <otest2/reporterattributes.h>
#include <ostream>
#include <tuple>
 
namespace OTest2 {
 
class Context;
 
class AssertStream : public std::ostream {
  private:
    const Context* context;
    AssertBufferPtr buffer;
    bool result;
    std::initializer_list<const char*> parameters;
 
  public:
    /* -- avoid copying */
    AssertStream(
        const AssertStream&) = delete;
    AssertStream& operator = (
        const AssertStream&) = delete;
 
    explicit AssertStream(
        const Context& context_,
        AssertBufferPtr buffer_,
        bool result_,
        std::initializer_list<const char*> parameters_);
 
    AssertStream(
        AssertStream&& other_);
 
    virtual ~AssertStream();
 
    void setForeground(
        Color color_);
 
    void setBackground(
        Color color_);
 
    void setTextStyle(
        Style style_);
 
    void resetAttributes();
 
    void printParameter(
        int index_);
 
    void commitMessage();
 
    bool getResult();
};
 
namespace Private {
 
template<typename... Values_>
class Manipulator {
  private:
    void (AssertStream::* fce)(Values_...);
    std::tuple<Values_...> args;
 
  public:
    explicit Manipulator(
        void (AssertStream::* fce_)(Values_...),
        Values_... args_);
    std::ostream& doTheJob(
        std::ostream& os_) const;
};
 
} /* -- namespace Private */
 
template<typename... Values_>
std::ostream& operator << (
    std::ostream& os_,
    const Private::Manipulator<Values_...>& manip_);
 
Private::Manipulator<Color> foreground(
    Color color_);
 
Private::Manipulator<Color> background(
    Color color_);
 
Private::Manipulator<Style> textStyle(
    Style style_);
 
Private::Manipulator<> resetAttrs();
 
Private::Manipulator<int> assertPar(
    int index_);
 
Private::Manipulator<> commitMsg();
 
} /* -- namespace OTest2 */
 
#endif /* -- OTest2_INCLUDE_OTEST2_ASSERTSTREAM_H_ */