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lnav/src/string_attr_type.hh

95 lines
3.2 KiB
C++

/**
* Copyright (c) 2020, Timothy Stack
*
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* * Redistributions of source code must retain the above copyright notice, this
* list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
* * Neither the name of Timothy Stack nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ''AS IS'' AND ANY
* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE FOR ANY
* DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#ifndef lnav_string_attr_type_hh
#define lnav_string_attr_type_hh
#include <string>
#include <utility>
#include <stdint.h>
#include "base/intern_string.hh"
#include "mapbox/variant.hpp"
class logfile;
struct bookmark_metadata;
using string_attr_value = mapbox::util::variant<int64_t,
const intern_string_t,
std::string,
std::shared_ptr<logfile>,
bookmark_metadata*>;
class string_attr_type_base {
public:
explicit string_attr_type_base(const char* name) noexcept : sat_name(name)
{
}
const char* const sat_name;
};
template<typename T>
class string_attr_type : public string_attr_type_base {
public:
using value_type = T;
explicit string_attr_type(const char* name) noexcept
: string_attr_type_base(name)
{
}
template<typename U = T>
std::enable_if_t<!std::is_void<U>::value,
std::pair<const string_attr_type_base*, string_attr_value>>
value(const U& val) const
{
return std::make_pair(this, val);
}
template<typename U = T>
std::enable_if_t<std::is_void<U>::value,
std::pair<const string_attr_type_base*, string_attr_value>>
value() const
{
return std::make_pair(this, string_attr_value{});
}
};
extern string_attr_type<void> SA_ORIGINAL_LINE;
extern string_attr_type<void> SA_BODY;
extern string_attr_type<void> SA_HIDDEN;
extern string_attr_type<const intern_string_t> SA_FORMAT;
extern string_attr_type<void> SA_REMOVED;
extern string_attr_type<std::string> SA_INVALID;
extern string_attr_type<std::string> SA_ERROR;
#endif