1 /* Some code common to C and ObjC front ends.
2 Copyright (C) 2001-2016 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"
25 #include "c-family/c-pretty-print.h"
26 #include "tree-pretty-print.h"
27 #include "langhooks.h"
28 #include "c-objc-common.h"
30 static bool c_tree_printer (pretty_printer
*, text_info
*, const char *,
31 int, bool, bool, bool);
34 c_missing_noreturn_ok_p (tree decl
)
36 /* A missing noreturn is not ok for freestanding implementations and
37 ok for the `main' function in hosted implementations. */
38 return flag_hosted
&& MAIN_NAME_P (DECL_ASSEMBLER_NAME (decl
));
41 /* Called from check_global_declaration. */
44 c_warn_unused_global_decl (const_tree decl
)
46 if (TREE_CODE (decl
) == FUNCTION_DECL
&& DECL_DECLARED_INLINE_P (decl
))
48 if (DECL_IN_SYSTEM_HEADER (decl
))
54 /* Initialization common to C and Objective-C front ends. */
56 c_objc_common_init (void)
58 c_init_decl_processing ();
60 return c_common_init ();
63 /* Called during diagnostic message formatting process to print a
64 source-level entity onto BUFFER. The meaning of the format specifiers
67 %E: an identifier or expression,
68 %F: a function declaration,
70 %V: a list of type qualifiers from a tree.
71 %v: an explicit list of type qualifiers
72 %#v: an explicit list of type qualifiers of a function type.
74 Please notice when called, the `%' part was already skipped by the
75 diagnostic machinery. */
77 c_tree_printer (pretty_printer
*pp
, text_info
*text
, const char *spec
,
78 int precision
, bool wide
, bool set_locus
, bool hash
)
82 // FIXME: the next cast should be a dynamic_cast, when it is permitted.
83 c_pretty_printer
*cpp
= (c_pretty_printer
*) pp
;
84 pp
->padding
= pp_none
;
86 if (precision
!= 0 || wide
)
91 percent_K_format (text
);
97 t
= va_arg (*text
->args_ptr
, tree
);
99 text
->set_location (0, DECL_SOURCE_LOCATION (t
), true);
105 if (VAR_P (t
) && DECL_HAS_DEBUG_EXPR_P (t
))
107 t
= DECL_DEBUG_EXPR (t
);
119 pp_identifier (cpp
, lang_hooks
.decl_printable_name (t
, 2));
126 gcc_assert (TYPE_P (t
));
127 struct obstack
*ob
= pp_buffer (cpp
)->obstack
;
128 char *p
= (char *) obstack_base (ob
);
129 /* Remember the end of the initial dump. */
130 int len
= obstack_object_size (ob
);
132 name
= TYPE_NAME (t
);
133 if (name
&& TREE_CODE (name
) == TYPE_DECL
&& DECL_NAME (name
))
134 pp_identifier (cpp
, lang_hooks
.decl_printable_name (name
, 2));
138 /* If we're printing a type that involves typedefs, also print the
139 stripped version. But sometimes the stripped version looks
140 exactly the same, so we don't want it after all. To avoid
141 printing it in that case, we play ugly obstack games. */
142 if (TYPE_CANONICAL (t
) && t
!= TYPE_CANONICAL (t
))
144 c_pretty_printer cpp2
;
145 /* Print the stripped version into a temporary printer. */
146 cpp2
.type_id (TYPE_CANONICAL (t
));
147 struct obstack
*ob2
= cpp2
.buffer
->obstack
;
148 /* Get the stripped version from the temporary printer. */
149 const char *aka
= (char *) obstack_base (ob2
);
150 int aka_len
= obstack_object_size (ob2
);
151 int type1_len
= obstack_object_size (ob
) - len
;
153 /* If they are identical, bail out. */
154 if (aka_len
== type1_len
&& memcmp (p
+ len
, aka
, aka_len
) == 0)
157 /* They're not, print the stripped version now. */
158 pp_c_whitespace (cpp
);
160 pp_c_ws_string (cpp
, _("aka"));
161 pp_c_whitespace (cpp
);
162 cpp
->type_id (TYPE_CANONICAL (t
));
163 pp_right_brace (cpp
);
169 if (TREE_CODE (t
) == IDENTIFIER_NODE
)
170 pp_identifier (cpp
, IDENTIFIER_POINTER (t
));
176 pp_c_type_qualifier_list (cpp
, t
);
180 pp_c_cv_qualifiers (cpp
, va_arg (*text
->args_ptr
, int), hash
);
187 pp_string (cpp
, _("({anonymous})"));
191 /* In C and ObjC, all decls have "C" linkage. */
193 has_c_linkage (const_tree decl ATTRIBUTE_UNUSED
)
199 c_initialize_diagnostics (diagnostic_context
*context
)
201 pretty_printer
*base
= context
->printer
;
202 c_pretty_printer
*pp
= XNEW (c_pretty_printer
);
203 context
->printer
= new (pp
) c_pretty_printer ();
205 /* It is safe to free this object because it was previously XNEW()'d. */
206 base
->~pretty_printer ();
209 c_common_diagnostics_set_defaults (context
);
210 diagnostic_format_decoder (context
) = &c_tree_printer
;
214 c_types_compatible_p (tree x
, tree y
)
216 return comptypes (TYPE_MAIN_VARIANT (x
), TYPE_MAIN_VARIANT (y
));
219 /* Determine if the type is a vla type for the backend. */
222 c_vla_unspec_p (tree x
, tree fn ATTRIBUTE_UNUSED
)
224 return c_vla_type_p (x
);