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// file : bbot/diagnostics -*- C++ -*-
// copyright : Copyright (c) 2014-2017 Code Synthesis Ltd
// license : MIT; see accompanying LICENSE file
#ifndef BBOT_DIAGNOSTICS
#define BBOT_DIAGNOSTICS
#include <butl/diagnostics>
#include <bbot/types>
#include <bbot/utility>
namespace bbot
{
using butl::diag_record;
// Throw this exception to terminate the process. The handler should
// assume that the diagnostics has already been issued.
//
class failed: public std::exception {};
// Verbosity level. Update documentation for --verbose if changing.
//
// 0 - disabled
// 1 - high-level information messages
// 2 - essential underlying commands that are being executed
// 3 - all underlying commands that are being executed
// 4 - information that could be helpful to the user
// 5 - information that could be helpful to the developer
// 6 - even more detailed information
//
// While uint8 is more than enough, use uint16 for the ease of printing.
//
extern uint16_t verb;
template <typename F> inline void l1 (const F& f) {if (verb >= 1) f ();}
template <typename F> inline void l2 (const F& f) {if (verb >= 2) f ();}
template <typename F> inline void l3 (const F& f) {if (verb >= 3) f ();}
template <typename F> inline void l4 (const F& f) {if (verb >= 4) f ();}
template <typename F> inline void l5 (const F& f) {if (verb >= 5) f ();}
template <typename F> inline void l6 (const F& f) {if (verb >= 6) f ();}
// Diagnostic facility, base infrastructure.
//
using butl::diag_stream;
using butl::diag_epilogue;
// Diagnostic facility, project specifics.
//
struct simple_prologue_base
{
explicit
simple_prologue_base (const char* type, const char* name)
: type_ (type), name_ (name) {}
void
operator() (const diag_record& r) const;
private:
const char* type_;
const char* name_;
};
class location
{
public:
location () {}
location (string f, uint64_t l, uint64_t c)
: file (move (f)), line (l), column (c) {}
string file;
uint64_t line;
uint64_t column;
};
struct location_prologue_base
{
location_prologue_base (const char* type,
const char* name,
const location& l)
: type_ (type), name_ (name), loc_ (l) {}
void
operator() (const diag_record& r) const;
private:
const char* type_;
const char* name_;
const location loc_;
};
struct basic_mark_base
{
using simple_prologue = butl::diag_prologue<simple_prologue_base>;
using location_prologue = butl::diag_prologue<location_prologue_base>;
explicit
basic_mark_base (const char* type,
const char* name = nullptr,
const void* data = nullptr,
diag_epilogue* epilogue = nullptr)
: type_ (type), name_ (name), data_ (data), epilogue_ (epilogue) {}
simple_prologue
operator() () const
{
return simple_prologue (epilogue_, type_, name_);
}
location_prologue
operator() (const location& l) const
{
return location_prologue (epilogue_, type_, name_, l);
}
template <typename L>
location_prologue
operator() (const L& l) const
{
return location_prologue (
epilogue_, type_, name_, get_location (l, data_));
}
template <typename F, typename L, typename C>
location_prologue
operator() (F&& f, L&& l, C&& c) const
{
return location_prologue (
epilogue_,
type_,
name_,
location (forward<F> (f), forward<L> (l), forward<C> (c)));
}
protected:
const char* type_;
const char* name_;
const void* data_;
diag_epilogue* const epilogue_;
};
using basic_mark = butl::diag_mark<basic_mark_base>;
extern const basic_mark error;
extern const basic_mark warn;
extern const basic_mark info;
extern const basic_mark text;
// trace
//
struct trace_mark_base: basic_mark_base
{
explicit
trace_mark_base (const char* name, const void* data = nullptr)
: basic_mark_base ("trace", name, data) {}
};
using trace_mark = butl::diag_mark<trace_mark_base>;
using tracer = trace_mark;
// fail
//
struct fail_mark_base: basic_mark_base
{
explicit
fail_mark_base (const char* type,
const void* data = nullptr)
: basic_mark_base (type,
nullptr,
data,
[](const diag_record& r)
{
r.flush ();
throw failed ();
}) {}
};
using fail_mark = butl::diag_mark<fail_mark_base>;
struct fail_end_base
{
[[noreturn]] void
operator() (const diag_record& r) const
{
// If we just throw then the record's destructor will see an active
// exception and will not flush the record.
//
r.flush ();
throw failed ();
}
};
using fail_end = butl::diag_noreturn_end<fail_end_base>;
extern const fail_mark fail;
extern const fail_end endf;
}
#endif // BBOT_DIAGNOSTICS
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