1 /* Some code common to C and ObjC front ends.
2 Copyright (C) 2001-2015 Free Software Foundation, Inc.
4 This file is part of GCC.
6 GCC is free software; you can redistribute it and/or modify it under
7 the terms of the GNU General Public License as published by the Free
8 Software Foundation; either version 3, or (at your option) any later
11 GCC is distributed in the hope that it will be useful, but WITHOUT ANY
12 WARRANTY; without even the implied warranty of MERCHANTABILITY or
13 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
16 You should have received a copy of the GNU General Public License
17 along with GCC; see the file COPYING3. If not see
18 <http://www.gnu.org/licenses/>. */
22 #include "coretypes.h"
29 #include "c-family/c-pretty-print.h"
30 #include "diagnostic.h"
31 #include "tree-pretty-print.h"
32 #include "langhooks.h"
33 #include "c-objc-common.h"
35 #include <new> // For placement new.
37 static bool c_tree_printer (pretty_printer
*, text_info
*, const char *,
38 int, bool, bool, bool);
41 c_missing_noreturn_ok_p (tree decl
)
43 /* A missing noreturn is not ok for freestanding implementations and
44 ok for the `main' function in hosted implementations. */
45 return flag_hosted
&& MAIN_NAME_P (DECL_ASSEMBLER_NAME (decl
));
48 /* Called from check_global_declaration. */
51 c_warn_unused_global_decl (const_tree decl
)
53 if (TREE_CODE (decl
) == FUNCTION_DECL
&& DECL_DECLARED_INLINE_P (decl
))
55 if (DECL_IN_SYSTEM_HEADER (decl
))
61 /* Initialization common to C and Objective-C front ends. */
63 c_objc_common_init (void)
65 c_init_decl_processing ();
67 return c_common_init ();
70 /* Called during diagnostic message formatting process to print a
71 source-level entity onto BUFFER. The meaning of the format specifiers
74 %E: an identifier or expression,
75 %F: a function declaration,
77 %V: a list of type qualifiers from a tree.
78 %v: an explicit list of type qualifiers
79 %#v: an explicit list of type qualifiers of a function type.
81 Please notice when called, the `%' part was already skipped by the
82 diagnostic machinery. */
84 c_tree_printer (pretty_printer
*pp
, text_info
*text
, const char *spec
,
85 int precision
, bool wide
, bool set_locus
, bool hash
)
89 // FIXME: the next cast should be a dynamic_cast, when it is permitted.
90 c_pretty_printer
*cpp
= (c_pretty_printer
*) pp
;
91 pp
->padding
= pp_none
;
93 if (precision
!= 0 || wide
)
98 percent_K_format (text
);
104 t
= va_arg (*text
->args_ptr
, tree
);
106 text
->set_location (0, DECL_SOURCE_LOCATION (t
));
112 if (VAR_P (t
) && DECL_HAS_DEBUG_EXPR_P (t
))
114 t
= DECL_DEBUG_EXPR (t
);
126 pp_identifier (cpp
, lang_hooks
.decl_printable_name (t
, 2));
133 gcc_assert (TYPE_P (t
));
134 struct obstack
*ob
= pp_buffer (cpp
)->obstack
;
135 char *p
= (char *) obstack_base (ob
);
136 /* Remember the end of the initial dump. */
137 int len
= obstack_object_size (ob
);
139 name
= TYPE_NAME (t
);
140 if (name
&& TREE_CODE (name
) == TYPE_DECL
&& DECL_NAME (name
))
141 pp_identifier (cpp
, lang_hooks
.decl_printable_name (name
, 2));
145 /* If we're printing a type that involves typedefs, also print the
146 stripped version. But sometimes the stripped version looks
147 exactly the same, so we don't want it after all. To avoid
148 printing it in that case, we play ugly obstack games. */
149 if (TYPE_CANONICAL (t
) && t
!= TYPE_CANONICAL (t
))
151 c_pretty_printer cpp2
;
152 /* Print the stripped version into a temporary printer. */
153 cpp2
.type_id (TYPE_CANONICAL (t
));
154 struct obstack
*ob2
= cpp2
.buffer
->obstack
;
155 /* Get the stripped version from the temporary printer. */
156 const char *aka
= (char *) obstack_base (ob2
);
157 int aka_len
= obstack_object_size (ob2
);
158 int type1_len
= obstack_object_size (ob
) - len
;
160 /* If they are identical, bail out. */
161 if (aka_len
== type1_len
&& memcmp (p
+ len
, aka
, aka_len
) == 0)
164 /* They're not, print the stripped version now. */
165 pp_c_whitespace (cpp
);
167 pp_c_ws_string (cpp
, _("aka"));
168 pp_c_whitespace (cpp
);
169 cpp
->type_id (TYPE_CANONICAL (t
));
170 pp_right_brace (cpp
);
176 if (TREE_CODE (t
) == IDENTIFIER_NODE
)
177 pp_identifier (cpp
, IDENTIFIER_POINTER (t
));
183 pp_c_type_qualifier_list (cpp
, t
);
187 pp_c_cv_qualifiers (cpp
, va_arg (*text
->args_ptr
, int), hash
);
194 pp_string (cpp
, _("({anonymous})"));
198 /* In C and ObjC, all decls have "C" linkage. */
200 has_c_linkage (const_tree decl ATTRIBUTE_UNUSED
)
206 c_initialize_diagnostics (diagnostic_context
*context
)
208 pretty_printer
*base
= context
->printer
;
209 c_pretty_printer
*pp
= XNEW (c_pretty_printer
);
210 context
->printer
= new (pp
) c_pretty_printer ();
212 /* It is safe to free this object because it was previously XNEW()'d. */
213 base
->~pretty_printer ();
216 c_common_diagnostics_set_defaults (context
);
217 diagnostic_format_decoder (context
) = &c_tree_printer
;
221 c_types_compatible_p (tree x
, tree y
)
223 return comptypes (TYPE_MAIN_VARIANT (x
), TYPE_MAIN_VARIANT (y
));
226 /* Determine if the type is a vla type for the backend. */
229 c_vla_unspec_p (tree x
, tree fn ATTRIBUTE_UNUSED
)
231 return c_vla_type_p (x
);