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/* Various declarations for language-independent diagnostics subroutines.
Copyright (C) 2000-2018 Free Software Foundation, Inc.
Contributed by Gabriel Dos Reis <>
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
GCC is distributed in the hope that it will be useful, but WITHOUT ANY
WARRANTY; without even the implied warranty of MERCHANTABILITY or
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
<>. */
#include "pretty-print.h"
#include "diagnostic-core.h"
/* A diagnostic is described by the MESSAGE to send, the FILE and LINE of
its context and its KIND (ice, error, warning, note, ...) See complete
list in diagnostic.def. */
struct diagnostic_info
/* Text to be formatted. */
text_info message;
/* The location at which the diagnostic is to be reported. */
rich_location *richloc;
/* Auxiliary data for client. */
void *x_data;
/* The kind of diagnostic it is about. */
diagnostic_t kind;
/* Which OPT_* directly controls this diagnostic. */
int option_index;
/* Each time a diagnostic's classification is changed with a pragma,
we record the change and the location of the change in an array of
these structs. */
struct diagnostic_classification_change_t
location_t location;
int option;
diagnostic_t kind;
/* Forward declarations. */
typedef void (*diagnostic_starter_fn) (diagnostic_context *,
diagnostic_info *);
typedef void (*diagnostic_start_span_fn) (diagnostic_context *,
typedef diagnostic_starter_fn diagnostic_finalizer_fn;
class edit_context;
/* This data structure bundles altogether any information relevant to
the context of a diagnostic message. */
struct diagnostic_context
/* Where most of the diagnostic formatting work is done. */
pretty_printer *printer;
/* The number of times we have issued diagnostics. */
int diagnostic_count[DK_LAST_DIAGNOSTIC_KIND];
/* True if it has been requested that warnings be treated as errors. */
bool warning_as_error_requested;
/* The number of option indexes that can be passed to warning() et
al. */
int n_opts;
/* For each option index that can be passed to warning() et al
(OPT_* from options.h when using this code with the core GCC
options), this array may contain a new kind that the diagnostic
should be changed to before reporting, or DK_UNSPECIFIED to leave
it as the reported kind, or DK_IGNORED to not report it at
all. */
diagnostic_t *classify_diagnostic;
/* History of all changes to the classifications above. This list
is stored in location-order, so we can search it, either
binary-wise or end-to-front, to find the most recent
classification for a given diagnostic, given the location of the
diagnostic. */
diagnostic_classification_change_t *classification_history;
/* The size of the above array. */
int n_classification_history;
/* For pragma push/pop. */
int *push_list;
int n_push;
/* True if we should print the source line with a caret indicating
the location. */
bool show_caret;
/* Maximum width of the source line printed. */
int caret_max_width;
/* Character used for caret diagnostics. */
char caret_chars[rich_location::STATICALLY_ALLOCATED_RANGES];
/* True if we should print the command line option which controls
each diagnostic, if known. */
bool show_option_requested;
/* True if we should raise a SIGABRT on errors. */
bool abort_on_error;
/* True if we should show the column number on diagnostics. */
bool show_column;
/* True if pedwarns are errors. */
bool pedantic_errors;
/* True if permerrors are warnings. */
bool permissive;
/* The index of the option to associate with turning permerrors into
warnings. */
int opt_permissive;
/* True if errors are fatal. */
bool fatal_errors;
/* True if all warnings should be disabled. */
bool dc_inhibit_warnings;
/* True if warnings should be given in system headers. */
bool dc_warn_system_headers;
/* Maximum number of errors to report. */
int max_errors;
/* This function is called before any message is printed out. It is
responsible for preparing message prefix and such. For example, it
might say:
In file included from "/usr/local/include/curses.h:5:
from "/home/gdr/src/nifty_printer.h:56:
diagnostic_starter_fn begin_diagnostic;
/* This function is called by diagnostic_show_locus in between
disjoint spans of source code, so that the context can print
something to indicate that a new span of source code has begun. */
diagnostic_start_span_fn start_span;
/* This function is called after the diagnostic message is printed. */
diagnostic_finalizer_fn end_diagnostic;
/* Client hook to report an internal error. */
void (*internal_error) (diagnostic_context *, const char *, va_list *);
/* Client hook to say whether the option controlling a diagnostic is
enabled. Returns nonzero if enabled, zero if disabled. */
int (*option_enabled) (int, void *);
/* Client information to pass as second argument to
option_enabled. */
void *option_state;
/* Client hook to return the name of an option that controls a
diagnostic. Returns malloced memory. The first diagnostic_t
argument is the kind of diagnostic before any reclassification
(of warnings as errors, etc.); the second is the kind after any
reclassification. May return NULL if no name is to be printed.
May be passed 0 as well as the index of a particular option. */
char *(*option_name) (diagnostic_context *, int, diagnostic_t, diagnostic_t);
/* Auxiliary data for client. */
void *x_data;
/* Used to detect that the last caret was printed at the same location. */
location_t last_location;
/* Used to detect when the input file stack has changed since last
described. */
const line_map_ordinary *last_module;
int lock;
bool inhibit_notes_p;
/* When printing source code, should the characters at carets and ranges
be colorized? (assuming colorization is on at all).
This should be true for frontends that generate range information
(so that the ranges of code are colorized),
and false for frontends that merely specify points within the
source code (to avoid e.g. colorizing just the first character in
a token, which would look strange). */
bool colorize_source_p;
/* Usable by plugins; if true, print a debugging ruler above the
source output. */
bool show_ruler_p;
/* If true, print fixits in machine-parseable form after the
rest of the diagnostic. */
bool parseable_fixits_p;
/* If non-NULL, an edit_context to which fix-it hints should be
applied, for generating patches. */
edit_context *edit_context_ptr;
static inline void
diagnostic_inhibit_notes (diagnostic_context * context)
context->inhibit_notes_p = true;
/* Client supplied function to announce a diagnostic. */
#define diagnostic_starter(DC) (DC)->begin_diagnostic
/* Client supplied function called after a diagnostic message is
displayed. */
#define diagnostic_finalizer(DC) (DC)->end_diagnostic
/* Extension hooks for client. */
#define diagnostic_context_auxiliary_data(DC) (DC)->x_data
#define diagnostic_info_auxiliary_data(DI) (DI)->x_data
/* Same as pp_format_decoder. Works on 'diagnostic_context *'. */
#define diagnostic_format_decoder(DC) ((DC)->printer->format_decoder)
/* Same as output_prefixing_rule. Works on 'diagnostic_context *'. */
#define diagnostic_prefixing_rule(DC) ((DC)->printer->wrapping.rule)
/* Raise SIGABRT on any diagnostic of severity DK_ERROR or higher. */
#define diagnostic_abort_on_error(DC) \
(DC)->abort_on_error = true
/* This diagnostic_context is used by front-ends that directly output
diagnostic messages without going through `error', `warning',
and similar functions. */
extern diagnostic_context *global_dc;
/* The total count of a KIND of diagnostics emitted so far. */
#define diagnostic_kind_count(DC, DK) (DC)->diagnostic_count[(int) (DK)]
/* The number of errors that have been issued so far. Ideally, these
would take a diagnostic_context as an argument. */
#define errorcount diagnostic_kind_count (global_dc, DK_ERROR)
/* Similarly, but for warnings. */
#define warningcount diagnostic_kind_count (global_dc, DK_WARNING)
/* Similarly, but for warnings promoted to errors. */
#define werrorcount diagnostic_kind_count (global_dc, DK_WERROR)
/* Similarly, but for sorrys. */
#define sorrycount diagnostic_kind_count (global_dc, DK_SORRY)
/* Returns nonzero if warnings should be emitted. */
#define diagnostic_report_warnings_p(DC, LOC) \
(!(DC)->dc_inhibit_warnings \
&& !(in_system_header_at (LOC) && !(DC)->dc_warn_system_headers))
/* Override the option index to be used for reporting a
diagnostic. */
static inline void
diagnostic_override_option_index (diagnostic_info *info, int optidx)
info->option_index = optidx;
/* Diagnostic related functions. */
extern void diagnostic_initialize (diagnostic_context *, int);
extern void diagnostic_color_init (diagnostic_context *, int value = -1);
extern void diagnostic_finish (diagnostic_context *);
extern void diagnostic_report_current_module (diagnostic_context *, location_t);
extern void diagnostic_show_locus (diagnostic_context *,
rich_location *richloc,
diagnostic_t diagnostic_kind);
/* Force diagnostics controlled by OPTIDX to be kind KIND. */
extern diagnostic_t diagnostic_classify_diagnostic (diagnostic_context *,
int /* optidx */,
diagnostic_t /* kind */,
extern void diagnostic_push_diagnostics (diagnostic_context *, location_t);
extern void diagnostic_pop_diagnostics (diagnostic_context *, location_t);
extern bool diagnostic_report_diagnostic (diagnostic_context *,
diagnostic_info *);
extern void diagnostic_set_info (diagnostic_info *, const char *, va_list *,
rich_location *, diagnostic_t) ATTRIBUTE_GCC_DIAG(2,0);
extern void diagnostic_set_info_translated (diagnostic_info *, const char *,
va_list *, rich_location *,
extern void diagnostic_append_note (diagnostic_context *, location_t,
const char *, ...) ATTRIBUTE_GCC_DIAG(3,4);
extern char *diagnostic_build_prefix (diagnostic_context *, const diagnostic_info *);
void default_diagnostic_starter (diagnostic_context *, diagnostic_info *);
void default_diagnostic_start_span_fn (diagnostic_context *,
void default_diagnostic_finalizer (diagnostic_context *, diagnostic_info *);
void diagnostic_set_caret_max_width (diagnostic_context *context, int value);
void diagnostic_action_after_output (diagnostic_context *, diagnostic_t);
void diagnostic_check_max_errors (diagnostic_context *, bool flush = false);
void diagnostic_file_cache_fini (void);
int get_terminal_width (void);
/* Return the location associated to this diagnostic. Parameter WHICH
specifies which location. By default, expand the first one. */
static inline location_t
diagnostic_location (const diagnostic_info * diagnostic, int which = 0)
return diagnostic->message.get_location (which);
/* Return the number of locations to be printed in DIAGNOSTIC. */
static inline unsigned int
diagnostic_num_locations (const diagnostic_info * diagnostic)
return diagnostic->message.m_richloc->get_num_locations ();
/* Expand the location of this diagnostic. Use this function for
consistency. Parameter WHICH specifies which location. By default,
expand the first one. */
static inline expanded_location
diagnostic_expand_location (const diagnostic_info * diagnostic, int which = 0)
return diagnostic->richloc->get_expanded_location (which);
/* This is somehow the right-side margin of a caret line, that is, we
print at least these many characters after the position pointed at
by the caret. */
const int CARET_LINE_MARGIN = 10;
/* Return true if the two locations can be represented within the same
caret line. This is used to build a prefix and also to determine
whether to print one or two caret lines. */
static inline bool
diagnostic_same_line (const diagnostic_context *context,
expanded_location s1, expanded_location s2)
return s2.column && s1.line == s2.line
&& context->caret_max_width - CARET_LINE_MARGIN > abs (s1.column - s2.column);
extern const char *diagnostic_get_color_for_kind (diagnostic_t kind);
/* Pure text formatting support functions. */
extern char *file_name_as_prefix (diagnostic_context *, const char *);
extern char *build_message_string (const char *, ...) ATTRIBUTE_PRINTF_1;
#endif /* ! GCC_DIAGNOSTIC_H */