/* YACC parser for C expressions, for GDB.
- Copyright (C) 1986-2015 Free Software Foundation, Inc.
+ Copyright (C) 1986-2017 Free Software Foundation, Inc.
This file is part of GDB.
#define parse_type(ps) builtin_type (parse_gdbarch (ps))
-/* Remap normal yacc parser interface names (yyparse, yylex, yyerror, etc),
- as well as gratuitiously global symbol names, so we can have multiple
- yacc generated parsers in gdb. Note that these are only the variables
- produced by yacc. If other parser generators (bison, byacc, etc) produce
- additional global names that conflict at link time, then those parser
- generators need to be fixed instead of adding those names to this list. */
-
-#define yymaxdepth c_maxdepth
-#define yyparse c_parse_internal
-#define yylex c_lex
-#define yyerror c_error
-#define yylval c_lval
-#define yychar c_char
-#define yydebug c_debug
-#define yypact c_pact
-#define yyr1 c_r1
-#define yyr2 c_r2
-#define yydef c_def
-#define yychk c_chk
-#define yypgo c_pgo
-#define yyact c_act
-#define yyexca c_exca
-#define yyerrflag c_errflag
-#define yynerrs c_nerrs
-#define yyps c_ps
-#define yypv c_pv
-#define yys c_s
-#define yy_yys c_yys
-#define yystate c_state
-#define yytmp c_tmp
-#define yyv c_v
-#define yy_yyv c_yyv
-#define yyval c_val
-#define yylloc c_lloc
-#define yyreds c_reds /* With YYDEBUG defined */
-#define yytoks c_toks /* With YYDEBUG defined */
-#define yyname c_name /* With YYDEBUG defined */
-#define yyrule c_rule /* With YYDEBUG defined */
-#define yylhs c_yylhs
-#define yylen c_yylen
-#define yydefred c_yydefred
-#define yydgoto c_yydgoto
-#define yysindex c_yysindex
-#define yyrindex c_yyrindex
-#define yygindex c_yygindex
-#define yytable c_yytable
-#define yycheck c_yycheck
-#define yyss c_yyss
-#define yysslim c_yysslim
-#define yyssp c_yyssp
-#define yystacksize c_yystacksize
-#define yyvs c_yyvs
-#define yyvsp c_yyvsp
-
-#ifndef YYDEBUG
-#define YYDEBUG 1 /* Default to yydebug support */
-#endif
-
-#define YYFPRINTF parser_fprintf
+/* Remap normal yacc parser interface names (yyparse, yylex, yyerror,
+ etc). */
+#define GDB_YY_REMAP_PREFIX c_
+#include "yy-remap.h"
/* The state of the parser, used internally when we are parsing the
expression. */
static int yylex (void);
-void yyerror (char *);
+void yyerror (const char *);
static int type_aggregate_p (struct type *);
#endif
%}
-%type <voidval> exp exp1 type_exp start variable qualified_name lcurly
+%type <voidval> exp exp1 type_exp start variable qualified_name lcurly function_method
%type <lval> rcurly
%type <tval> type typebase
%type <tvec> nonempty_typelist func_mod parameter_typelist
write_exp_elt_opcode (pstate, OP_FUNCALL); }
;
+/* This is here to disambiguate with the production for
+ "func()::static_var" further below, which uses
+ function_method_void. */
+exp : exp '(' ')' %prec ARROW
+ { start_arglist ();
+ write_exp_elt_opcode (pstate, OP_FUNCALL);
+ write_exp_elt_longcst (pstate,
+ (LONGEST) end_arglist ());
+ write_exp_elt_opcode (pstate, OP_FUNCALL); }
+ ;
+
+
exp : UNKNOWN_CPP_NAME '('
{
/* This could potentially be a an argument defined
{ arglist_len++; }
;
-exp : exp '(' parameter_typelist ')' const_or_volatile
+function_method: exp '(' parameter_typelist ')' const_or_volatile
{ int i;
VEC (type_ptr) *type_list = $3;
struct type *type_elt;
LONGEST len = VEC_length (type_ptr, type_list);
write_exp_elt_opcode (pstate, TYPE_INSTANCE);
+ /* Save the const/volatile qualifiers as
+ recorded by the const_or_volatile
+ production's actions. */
+ write_exp_elt_longcst (pstate,
+ follow_type_instance_flags ());
write_exp_elt_longcst (pstate, len);
for (i = 0;
VEC_iterate (type_ptr, type_list, i, type_elt);
}
;
+function_method_void: exp '(' ')' const_or_volatile
+ { write_exp_elt_opcode (pstate, TYPE_INSTANCE);
+ /* See above. */
+ write_exp_elt_longcst (pstate,
+ follow_type_instance_flags ());
+ write_exp_elt_longcst (pstate, 0);
+ write_exp_elt_longcst (pstate, 0);
+ write_exp_elt_opcode (pstate, TYPE_INSTANCE);
+ }
+ ;
+
+exp : function_method
+ ;
+
+/* Normally we must interpret "func()" as a function call, instead of
+ a type. The user needs to write func(void) to disambiguate.
+ However, in the "func()::static_var" case, there's no
+ ambiguity. */
+function_method_void_or_typelist: function_method
+ | function_method_void
+ ;
+
+exp : function_method_void_or_typelist COLONCOLON name
+ {
+ write_exp_elt_opcode (pstate, OP_FUNC_STATIC_VAR);
+ write_exp_string (pstate, $3);
+ write_exp_elt_opcode (pstate, OP_FUNC_STATIC_VAR);
+ }
+ ;
+
rcurly : '}'
{ $$ = end_arglist () - 1; }
;
says of sizeof: "When applied to a reference
or a reference type, the result is the size of
the referenced type." */
- if (TYPE_CODE (type) == TYPE_CODE_REF)
+ if (TYPE_IS_REFERENCE (type))
type = check_typedef (TYPE_TARGET_TYPE (type));
write_exp_elt_longcst (pstate,
(LONGEST) TYPE_LENGTH (type));
}
else
{
- struct bound_minimal_symbol msymbol;
char *arg = copy_name ($1.stoken);
- msymbol =
- lookup_bound_minimal_symbol (arg);
- if (msymbol.minsym != NULL)
- write_exp_msymbol (pstate, msymbol);
- else if (!have_full_symbols () && !have_partial_symbols ())
- error (_("No symbol table is loaded. Use the \"file\" command."));
+ bound_minimal_symbol msymbol
+ = lookup_bound_minimal_symbol (arg);
+ if (msymbol.minsym == NULL)
+ {
+ if (!have_full_symbols () && !have_partial_symbols ())
+ error (_("No symbol table is loaded. Use the \"file\" command."));
+ else
+ error (_("No symbol \"%s\" in current context."),
+ copy_name ($1.stoken));
+ }
+
+ /* This minsym might be an alias for
+ another function. See if we can find
+ the debug symbol for the target, and
+ if so, use it instead, since it has
+ return type / prototype info. This
+ is important for example for "p
+ *__errno_location()". */
+ symbol *alias_target
+ = find_function_alias_target (msymbol);
+ if (alias_target != NULL)
+ {
+ write_exp_elt_opcode (pstate, OP_VAR_VALUE);
+ write_exp_elt_block
+ (pstate, SYMBOL_BLOCK_VALUE (alias_target));
+ write_exp_elt_sym (pstate, alias_target);
+ write_exp_elt_opcode (pstate, OP_VAR_VALUE);
+ }
else
- error (_("No symbol \"%s\" in current context."),
- copy_name ($1.stoken));
+ write_exp_msymbol (pstate, msymbol);
}
}
;
{ insert_type (tp_reference); }
| '&' ptr_operator
{ insert_type (tp_reference); }
+ | ANDAND
+ { insert_type (tp_rvalue_reference); }
+ | ANDAND ptr_operator
+ { insert_type (tp_rvalue_reference); }
;
ptr_operator_ts: ptr_operator
| OPERATOR OBJC_LBRAC ']'
{ $$ = operator_stoken ("[]"); }
| OPERATOR conversion_type_id
- { char *name;
- long length;
- struct ui_file *buf = mem_fileopen ();
+ { string_file buf;
- c_print_type ($2, NULL, buf, -1, 0,
+ c_print_type ($2, NULL, &buf, -1, 0,
&type_print_raw_options);
- name = ui_file_xstrdup (buf, &length);
- ui_file_delete (buf);
- $$ = operator_stoken (name);
- free (name);
+ $$ = operator_stoken (buf.c_str ());
}
;
static struct stoken
operator_stoken (const char *op)
{
- static const char *operator_string = "operator";
struct stoken st = { NULL, 0 };
char *buf;
- st.length = strlen (operator_string) + strlen (op);
+ st.length = CP_OPERATOR_LEN + strlen (op);
buf = (char *) malloc (st.length + 1);
- strcpy (buf, operator_string);
+ strcpy (buf, CP_OPERATOR_STR);
strcat (buf, op);
st.ptr = buf;
if (len >= 2 && p[len - 2] == 'd' && p[len - 1] == 'f')
{
- p[len - 2] = '\0';
putithere->typed_val_decfloat.type
= parse_type (par_state)->builtin_decfloat;
decimal_from_string (putithere->typed_val_decfloat.val, 4,
gdbarch_byte_order (parse_gdbarch (par_state)),
- p);
- p[len - 2] = 'd';
+ std::string (p, len - 2));
return DECFLOAT;
}
if (len >= 2 && p[len - 2] == 'd' && p[len - 1] == 'd')
{
- p[len - 2] = '\0';
putithere->typed_val_decfloat.type
= parse_type (par_state)->builtin_decdouble;
decimal_from_string (putithere->typed_val_decfloat.val, 8,
gdbarch_byte_order (parse_gdbarch (par_state)),
- p);
- p[len - 2] = 'd';
+ std::string (p, len - 2));
return DECFLOAT;
}
if (len >= 2 && p[len - 2] == 'd' && p[len - 1] == 'l')
{
- p[len - 2] = '\0';
putithere->typed_val_decfloat.type
= parse_type (par_state)->builtin_declong;
decimal_from_string (putithere->typed_val_decfloat.val, 16,
gdbarch_byte_order (parse_gdbarch (par_state)),
- p);
- p[len - 2] = 'd';
+ std::string (p, len - 2));
return DECFLOAT;
}
struct token
{
- char *oper;
+ const char *oper;
int token;
enum exp_opcode opcode;
token_flags flags;
/* Temporary storage for c_lex; this holds symbol names as they are
built up. */
-static struct obstack name_obstack;
+auto_obstack name_obstack;
/* Classify a NAME token. The contents of the token are in `yylval'.
Updates yylval and returns the new token type. BLOCK is the block
current = *VEC_index (token_and_value, token_fifo, next_to_examine);
++next_to_examine;
- obstack_free (&name_obstack, obstack_base (&name_obstack));
+ name_obstack.clear ();
checkpoint = 0;
if (current.token == FILENAME)
search_block = current.value.bval;
struct cleanup *back_to;
/* Setting up the parser state. */
+ scoped_restore pstate_restore = make_scoped_restore (&pstate);
gdb_assert (par_state != NULL);
pstate = par_state;
+ /* Note that parsing (within yyparse) freely installs cleanups
+ assuming they'll be run here (below). */
+
back_to = make_cleanup (free_current_contents, &expression_macro_scope);
- make_cleanup_clear_parser_state (&pstate);
/* Set up the scope for macro expansion. */
expression_macro_scope = NULL;
gdb_assert (! macro_original_text);
make_cleanup (scan_macro_cleanup, 0);
- make_cleanup_restore_integer (&yydebug);
- yydebug = parser_debug;
+ scoped_restore restore_yydebug = make_scoped_restore (&yydebug,
+ parser_debug);
/* Initialize some state used by the lexer. */
last_was_structop = 0;
VEC_free (token_and_value, token_fifo);
popping = 0;
- obstack_init (&name_obstack);
- make_cleanup_obstack_free (&name_obstack);
+ name_obstack.clear ();
result = yyparse ();
do_cleanups (back_to);
switch (type)
{
case INT:
- fprintf (file, "typed_val_int<%s, %s>",
- TYPE_SAFE_NAME (value.typed_val_int.type),
- pulongest (value.typed_val_int.val));
+ parser_fprintf (file, "typed_val_int<%s, %s>",
+ TYPE_SAFE_NAME (value.typed_val_int.type),
+ pulongest (value.typed_val_int.val));
break;
case CHAR:
memcpy (copy, value.tsval.ptr, value.tsval.length);
copy[value.tsval.length] = '\0';
- fprintf (file, "tsval<type=%d, %s>", value.tsval.type, copy);
+ parser_fprintf (file, "tsval<type=%d, %s>", value.tsval.type, copy);
}
break;
case NSSTRING:
case VARIABLE:
- fprintf (file, "sval<%s>", copy_name (value.sval));
+ parser_fprintf (file, "sval<%s>", copy_name (value.sval));
break;
case TYPENAME:
- fprintf (file, "tsym<type=%s, name=%s>",
- TYPE_SAFE_NAME (value.tsym.type),
- copy_name (value.tsym.stoken));
+ parser_fprintf (file, "tsym<type=%s, name=%s>",
+ TYPE_SAFE_NAME (value.tsym.type),
+ copy_name (value.tsym.stoken));
break;
case NAME:
case UNKNOWN_CPP_NAME:
case NAME_OR_INT:
case BLOCKNAME:
- fprintf (file, "ssym<name=%s, sym=%s, field_of_this=%d>",
- copy_name (value.ssym.stoken),
- (value.ssym.sym.symbol == NULL
- ? "(null)" : SYMBOL_PRINT_NAME (value.ssym.sym.symbol)),
- value.ssym.is_a_field_of_this);
+ parser_fprintf (file, "ssym<name=%s, sym=%s, field_of_this=%d>",
+ copy_name (value.ssym.stoken),
+ (value.ssym.sym.symbol == NULL
+ ? "(null)" : SYMBOL_PRINT_NAME (value.ssym.sym.symbol)),
+ value.ssym.is_a_field_of_this);
break;
case FILENAME:
- fprintf (file, "bval<%s>", host_address_to_string (value.bval));
+ parser_fprintf (file, "bval<%s>", host_address_to_string (value.bval));
break;
}
}
#endif
void
-yyerror (char *msg)
+yyerror (const char *msg)
{
if (prev_lexptr)
lexptr = prev_lexptr;
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