#pragma once

#include "config.h"

#include <string>
#include <list>
#include <set>

#include <boost/format.hpp>

/* Before 4.7, gcc's std::exception uses empty throw() specifiers for
 * its (virtual) destructor and what() in c++11 mode, in violation of spec
 */
#ifdef __GNUC__
#if __GNUC__ < 4 || (__GNUC__ == 4 && __GNUC_MINOR__ < 7)
#define EXCEPTION_NEEDS_THROW_SPEC
#endif
#endif


namespace nix {


/* Inherit some names from other namespaces for convenience. */
using std::string;
using std::list;
using std::set;
using std::vector;
using boost::format;


struct FormatOrString
{
    string s;
    FormatOrString(const string & s) : s(s) { };
    FormatOrString(const format & f) : s(f.str()) { };
    FormatOrString(const char * s) : s(s) { };
};


/* BaseError should generally not be caught, as it has Interrupted as
   a subclass. Catch Error instead. */
class BaseError : public std::exception
{
protected:
    string prefix_; // used for location traces etc.
    string err;
public:
    unsigned int status; // exit status
    BaseError(const FormatOrString & fs, unsigned int status = 1);
#ifdef EXCEPTION_NEEDS_THROW_SPEC
    ~BaseError() throw () { };
    const char * what() const throw () { return err.c_str(); }
#else
    const char * what() const noexcept { return err.c_str(); }
#endif
    const string & msg() const { return err; }
    const string & prefix() const { return prefix_; }
    BaseError & addPrefix(const FormatOrString & fs);
};

#define MakeError(newClass, superClass) \
    class newClass : public superClass                  \
    {                                                   \
    public:                                             \
        newClass(const FormatOrString & fs, unsigned int status = 1) : superClass(fs, status) { }; \
    };

MakeError(Error, BaseError)

class SysError : public Error
{
public:
    int errNo;
    SysError(const FormatOrString & fs);
};


typedef list<string> Strings;
typedef set<string> StringSet;


/* Paths are just strings. */
typedef string Path;
typedef list<Path> Paths;
typedef set<Path> PathSet;


typedef enum {
    lvlError = 0,
    lvlInfo,
    lvlTalkative,
    lvlChatty,
    lvlDebug,
    lvlVomit
} Verbosity;


}
ass='left'>Commit message (<a href='/guix/log/NEWS?id=d2b8900f58b269a8e1bc66510aca264ab653fb8c&amp;showmsg=1'>Expand</a>)</th><th class='left'>Author</th></tr>
<tr><td><span title='2018-07-05 22:16:39 +0200'>2018-07-05</span></td><td><a href='/guix/commit/NEWS?id=359fdda40f754bbf1b5dc261e7427b75463b59be'>Update NEWS.</a></td><td>Ludovic Courtès</td></tr>
<tr><td><span title='2018-07-05 17:19:09 +0200'>2018-07-05</span></td><td><a href='/guix/commit/NEWS?id=1400776f529317c6c3529a0fda2b728e48a621a2'>Update NEWS.</a></td><td>Ludovic Courtès</td></tr>
<tr><td><span title='2018-06-20 23:47:08 +0200'>2018-06-20</span></td><td><a href='/guix/commit/NEWS?id=414ee4edc9e6fcadba366072a7ebabf3e3c6f26a'>Update NEWS.</a></td><td>Ludovic Courtès</td></tr>
<tr><td><span title='2018-05-29 14:05:11 +0200'>2018-05-29</span></td><td><a href='/guix/commit/NEWS?id=55a433ebb0b2deb69141619d0a0b1e298a969c36'>Update NEWS.</a></td><td>Ricardo Wurmus</td></tr>
<tr><td><span title='2018-05-20 21:42:32 +0300'>2018-05-20</span></td><td><a href='/guix/commit/NEWS?id=e9d271ed9a1fba86f372986a137b6110a41a1324'>services: Add Enlightenment desktop service.</a><span class='msg-avail'>...<span class='msg-tooltip'>* gnu/services/desktop.scm (&lt;enlightenment-desktop-configuration&gt;,
enlightenment-desktop-service-type): New variables.
* doc/guix.texi (Desktop Services): Document the service.
* NEWS: Mention it.
</span></span></td><td>Efraim Flashner</td></tr>
<tr><td><span title='2018-05-08 21:55:46 -0700'>2018-05-08</span></td><td><a href='/guix/commit/NEWS?id=ede121de426f9c56820852888a0b370f0ccbce49'>guix: Separate the package name and version with "@", not "-".</a><span class='msg-avail'>...<span class='msg-tooltip'>* guix/packages.scm (package-full-name): By default, use "@" to separate
  the package name and package version.  Add an optional delimiter
  argument so that there is still a way to explicitly use a different
  delimiter.
* gnu/packages/commencement.scm (gcc-boot0) &lt;unpack-gmp&amp;co&gt;: Adjust
  accordingly.
* tests/graph.scm: Adjust accordingly.
* tests/profiles.scm: Adjust accordingly.
* NEWS: Mention the change.

Fixes: &lt;https://bugs.gnu.org/31088&gt;.
Reported by Pierre Neidhardt &lt;ambrevar@gmail.com&gt;.
</span></span></td><td>Chris Marusich</td></tr>
<tr><td><span title='2017-12-06 09:14:53 +0100'>2017-12-06</span></td><td><a href='/guix/commit/NEWS?id=40f5c53d89da266055a1dd6571c380f5c57fe5f9'>Update NEWS.</a></td><td>Ludovic Courtès</td></tr>
<tr><td><span title='2017-12-06 08:58:26 +0100'>2017-12-06</span></td><td><a href='/guix/commit/NEWS?id=f0eb57b736f6fae67acbaad66a1b5e18fdfc10a0'>Update NEWS.</a></td><td>Ludovic Courtès</td></tr>
<tr><td><span title='2017-12-05 15:37:01 +0100'>2017-12-05</span></td><td><a href='/guix/commit/NEWS?id=f3e3f4d934ee0ecd71f5c73a57252ed1d0bad88e'>Update NEWS.</a></td><td>Ludovic Courtès</td></tr>
<tr><td><span title='2017-12-04 17:56:11 +0100'>2017-12-04</span></td><td><a href='/guix/commit/NEWS?id=c735e9e6868bb7661f08ffa008f1feaedf2fcb9e'>Update NEWS.</a></td><td>Ludovic Courtès</td></tr>
<tr><td><span title='2017-05-22 17:25:08 +0200'>2017-05-22</span></td><td><a href='/guix/commit/NEWS?id=7c63fff6d0ba1dcd74e1a31c13b501d24d9c66f6'>Update NEWS.</a></td><td>Ludovic Courtès</td></tr>
<tr><td><span title='2017-05-21 13:45:54 +0200'>2017-05-21</span></td><td><a href='/guix/commit/NEWS?id=31025edc9415d8befd7dc2e5df2946495df0c29e'>Update NEWS.</a></td><td>Ludovic Courtès</td></tr>
<tr><td><span title='2017-05-20 23:39:30 +0200'>2017-05-20</span></td><td><a href='/guix/commit/NEWS?id=402f241da491b685132b2a1a4327553c700a4e62'>Update NEWS.</a></td><td>Ricardo Wurmus</td></tr>
<tr><td><span title='2017-05-17 23:04:59 +0200'>2017-05-17</span></td><td><a href='/guix/commit/NEWS?id=266d281d253ffd20336f837fc64a64a14eb44b12'>Update NEWS.</a></td><td>Ricardo Wurmus</td></tr>
<tr><td><span title='2017-05-16 15:18:12 +0200'>2017-05-16</span></td><td><a href='/guix/commit/NEWS?id=43e5a262aa4ddf8e2a34f94f9672910ccd48030a'>Update NEWS.</a></td><td>Ludovic Courtès</td></tr>
<tr><td><span title='2016-12-20 12:29:13 +0100'>2016-12-20</span></td><td><a href='/guix/commit/NEWS?id=620431be6154f6e056fc8ed51a22c97336aa8fdc'>Update NEWS.</a><span class='msg-avail'>...<span class='msg-tooltip'>Co-authored-by: Ludovic Courtès &lt;ludo@gnu.org&gt;
</span></span></td><td>Ricardo Wurmus</td></tr>