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// Copyright (C) 2020-2023 Free Software Foundation, Inc.
// This file is part of GCC.
// GCC is free software; you can redistribute it and/or modify it under
// the terms of the GNU General Public License as published by the Free
// Software Foundation; either version 3, or (at your option) any later
// version.
// GCC 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 General Public License
// for more details.
// You should have received a copy of the GNU General Public License
// along with GCC; see the file COPYING3. If not see
// <http://www.gnu.org/licenses/>.
// rust-diagnostics.h -- interface to diagnostic reporting -*- C++ -*-
#ifndef RUST_DIAGNOSTICS_H
#define RUST_DIAGNOSTICS_H
#include "rust-linemap.h"
#if __GNUC__ > 4 || (__GNUC__ == 4 && __GNUC_MINOR__ >= 1)
#define RUST_ATTRIBUTE_GCC_DIAG(m, n) \
__attribute__ ((__format__ (__gcc_tdiag__, m, n))) \
__attribute__ ((__nonnull__ (m)))
#else
#define RUST_ATTRIBUTE_GCC_DIAG(m, n)
#endif
// These declarations define the interface through which the frontend
// reports errors and warnings. These functions accept printf-like
// format specifiers (e.g. %d, %f, %s, etc), with the following additional
// extensions:
//
// 1. 'q' qualifier may be applied to a specifier to add quoting, e.g.
// %qd produces a quoted decimal output, %qs a quoted string output.
// [This extension is supported only with single-character format
// specifiers].
//
// 2. %m specifier outputs value of "strerror(errno)" at time of call.
//
// 3. %< outputs an opening quote, %> a closing quote.
//
// All other format specifiers are as defined by 'sprintf'. The final resulting
// message is then sent to the back end via rust_be_error_at/rust_be_warning_at.
// clang-format off
// simple location
extern void
rust_internal_error_at (const Location, const char *fmt, ...)
RUST_ATTRIBUTE_GCC_DIAG (2, 3)
RUST_ATTRIBUTE_NORETURN;
extern void
rust_error_at (const Location, const char *fmt, ...)
RUST_ATTRIBUTE_GCC_DIAG (2, 3);
extern void
rust_warning_at (const Location, int opt, const char *fmt, ...)
RUST_ATTRIBUTE_GCC_DIAG (3, 4);
extern void
rust_fatal_error (const Location, const char *fmt, ...)
RUST_ATTRIBUTE_GCC_DIAG (2, 3)
RUST_ATTRIBUTE_NORETURN;
extern void
rust_inform (const Location, const char *fmt, ...)
RUST_ATTRIBUTE_GCC_DIAG (2, 3);
// rich locations
extern void
rust_error_at (const RichLocation &, const char *fmt, ...)
RUST_ATTRIBUTE_GCC_DIAG (2, 3);
// clang-format on
// These interfaces provide a way for the front end to ask for
// the open/close quote characters it should use when formatting
// diagnostics (warnings, errors).
extern const char *
rust_open_quote ();
extern const char *
rust_close_quote ();
// These interfaces are used by utilities above to pass warnings and
// errors (once format specifiers have been expanded) to the back end,
// and to determine quoting style. Avoid calling these routines directly;
// instead use the equivalent routines above. The back end is required to
// implement these routines.
// clang-format off
extern void
rust_be_internal_error_at (const Location, const std::string &errmsg)
RUST_ATTRIBUTE_NORETURN;
extern void
rust_be_error_at (const Location, const std::string &errmsg);
extern void
rust_be_error_at (const RichLocation &, const std::string &errmsg);
extern void
rust_be_warning_at (const Location, int opt, const std::string &warningmsg);
extern void
rust_be_fatal_error (const Location, const std::string &errmsg)
RUST_ATTRIBUTE_NORETURN;
extern void
rust_be_inform (const Location, const std::string &infomsg);
extern void
rust_be_get_quotechars (const char **open_quote, const char **close_quote);
extern bool
rust_be_debug_p (void);
// clang-format on
namespace Rust {
/* A structure used to represent an error. Useful for enabling
* errors to be ignored, e.g. if backtracking. */
struct Error
{
enum class Kind
{
Hint,
Err,
FatalErr,
};
Kind kind;
Location locus;
std::string message;
// TODO: store more stuff? e.g. node id?
Error (Kind kind, Location locus, std::string message)
: kind (kind), locus (locus), message (std::move (message))
{
message.shrink_to_fit ();
}
Error (Location locus, std::string message)
{
Error (Kind::Err, locus, std::move (message));
}
static Error Hint (Location locus, std::string message)
{
return Error (Kind::Hint, locus, std::move (message));
}
static Error Fatal (Location locus, std::string message)
{
return Error (Kind::FatalErr, locus, std::move (message));
}
// TODO: the attribute part might be incorrect
Error (Location locus, const char *fmt,
...) /*RUST_ATTRIBUTE_GCC_DIAG (2, 3)*/ RUST_ATTRIBUTE_GCC_DIAG (3, 4);
/**
* printf-like overload of Error::Hint
*/
static Error Hint (Location locus, const char *fmt, ...)
RUST_ATTRIBUTE_GCC_DIAG (2, 3);
/**
* printf-like overload of Error::Fatal
*/
static Error Fatal (Location locus, const char *fmt, ...)
RUST_ATTRIBUTE_GCC_DIAG (2, 3);
void emit () const
{
switch (kind)
{
case Kind::Hint:
rust_inform (locus, "%s", message.c_str ());
break;
case Kind::Err:
rust_error_at (locus, "%s", message.c_str ());
break;
case Kind::FatalErr:
rust_fatal_error (locus, "%s", message.c_str ());
break;
}
}
};
} // namespace Rust
// rust_debug uses normal printf formatting, not GCC diagnostic formatting.
#define rust_debug(...) rust_debug_loc (Location (), __VA_ARGS__)
// rust_sorry_at wraps GCC diagnostic "sorry_at" to accept "Location" instead of
// "location_t"
#define rust_sorry_at(location, ...) \
sorry_at (location.gcc_location (), __VA_ARGS__)
void
rust_debug_loc (const Location location, const char *fmt,
...) ATTRIBUTE_PRINTF_2;
#endif // !defined(RUST_DIAGNOSTICS_H)
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