/* Parser definitions for GDB.
- Copyright (C) 1986, 1989, 1990, 1991 Free Software Foundation, Inc.
+
+ Copyright (C) 1986-2014 Free Software Foundation, Inc.
+
Modified from expread.y by the Department of Computer Science at the
State University of New York at Buffalo.
-This file is part of GDB.
+ This file is part of GDB.
-This program 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 2 of the License, or
-(at your option) any later version.
+ This program 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 of the License, or
+ (at your option) any later version.
-This program 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.
+ This program 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 this program; if not, write to the Free Software
-Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
+ You should have received a copy of the GNU General Public License
+ along with this program. If not, see <http://www.gnu.org/licenses/>. */
#if !defined (PARSER_DEFS_H)
#define PARSER_DEFS_H 1
-struct std_regs {
- char *name;
- int regnum;
-};
+#include "doublest.h"
+#include "vec.h"
+#include "expression.h"
-extern struct std_regs std_regs[];
-extern unsigned num_std_regs;
+struct block;
+struct language_defn;
+struct internalvar;
-extern struct expression *expout;
-extern int expout_size;
-extern int expout_ptr;
+extern int parser_debug;
+
+#define parse_gdbarch(ps) ((ps)->expout->gdbarch)
+#define parse_language(ps) ((ps)->expout->language_defn)
+
+struct parser_state
+{
+ /* The expression related to this parser state. */
+
+ struct expression *expout;
+
+ /* The size of the expression above. */
+
+ size_t expout_size;
+
+ /* The number of elements already in the expression. This is used
+ to know where to put new elements. */
+
+ size_t expout_ptr;
+};
/* If this is nonzero, this block is used as the lexical context
for symbol names. */
-extern struct block *expression_context_block;
+extern const struct block *expression_context_block;
+
+/* If expression_context_block is non-zero, then this is the PC within
+ the block that we want to evaluate expressions at. When debugging
+ C or C++ code, we use this to find the exact line we're at, and
+ then look up the macro definitions active at that point. */
+extern CORE_ADDR expression_context_pc;
/* The innermost context required by the stack and register variables
- we've encountered so far. */
-extern struct block *innermost_block;
+ we've encountered so far. */
+extern const struct block *innermost_block;
/* The block in which the most recently discovered symbol was found.
FIXME: Should be declared along with lookup_symbol in symtab.h; is not
related specifically to parsing. */
-extern struct block *block_found;
+extern const struct block *block_found;
/* Number of arguments seen so far in innermost function call. */
extern int arglist_len;
/* A string token, either a char-string or bit-string. Char-strings are
- used, for example, for the names of symbols. */
+ used, for example, for the names of symbols. */
struct stoken
{
- /* Pointer to first byte of char-string or first bit of bit-string */
+ /* Pointer to first byte of char-string or first bit of bit-string. */
+ const char *ptr;
+ /* Length of string in bytes for char-string or bits for bit-string. */
+ int length;
+ };
+
+struct typed_stoken
+ {
+ /* A language-specific type field. */
+ int type;
+ /* Pointer to first byte of char-string or first bit of bit-string. */
char *ptr;
- /* Length of string in bytes for char-string or bits for bit-string */
+ /* Length of string in bytes for char-string or bits for bit-string. */
int length;
};
+struct stoken_vector
+ {
+ int len;
+ struct typed_stoken *tokens;
+ };
+
struct ttype
{
struct stoken stoken;
int is_a_field_of_this;
};
+struct objc_class_str
+ {
+ struct stoken stoken;
+ struct type *type;
+ int class;
+ };
+
+typedef struct type *type_ptr;
+DEF_VEC_P (type_ptr);
+
/* For parsing of complicated types.
An array should be preceded in the list by the size of the array. */
enum type_pieces
- {tp_end = -1, tp_pointer, tp_reference, tp_array, tp_function};
+ {
+ tp_end = -1,
+ tp_pointer,
+ tp_reference,
+ tp_array,
+ tp_function,
+ tp_function_with_arguments,
+ tp_const,
+ tp_volatile,
+ tp_space_identifier,
+ tp_type_stack
+ };
/* The stack can contain either an enum type_pieces or an int. */
-union type_stack_elt {
- enum type_pieces piece;
- int int_val;
+union type_stack_elt
+ {
+ enum type_pieces piece;
+ int int_val;
+ struct type_stack *stack_val;
+ VEC (type_ptr) *typelist_val;
+ };
+
+/* The type stack is an instance of this structure. */
+
+struct type_stack
+{
+ /* Elements on the stack. */
+ union type_stack_elt *elements;
+ /* Current stack depth. */
+ int depth;
+ /* Allocated size of stack. */
+ int size;
};
-extern union type_stack_elt *type_stack;
-extern int type_stack_depth, type_stack_size;
-extern void write_exp_elt PARAMS ((union exp_element));
+/* Helper function to initialize the expout, expout_size, expout_ptr
+ trio inside PS before it is used to store expression elements created
+ during the parsing of an expression. INITIAL_SIZE is the initial size of
+ the expout array. LANG is the language used to parse the expression.
+ And GDBARCH is the gdbarch to use during parsing. */
-extern void write_exp_elt_opcode PARAMS ((enum exp_opcode));
+extern void initialize_expout (struct parser_state *ps,
+ size_t initial_size,
+ const struct language_defn *lang,
+ struct gdbarch *gdbarch);
-extern void write_exp_elt_sym PARAMS ((struct symbol *));
+/* Helper function that reallocates the EXPOUT inside PS in order to
+ eliminate any unused space. It is generally used when the expression
+ has just been parsed and created. */
-extern void write_exp_elt_longcst PARAMS ((LONGEST));
+extern void reallocate_expout (struct parser_state *ps);
-extern void write_exp_elt_dblcst PARAMS ((DOUBLEST));
+/* Reverse an expression from suffix form (in which it is constructed)
+ to prefix form (in which we can conveniently print or execute it).
+ Ordinarily this always returns -1. However, if EXPOUT_LAST_STRUCT
+ is not -1 (i.e., we are trying to complete a field name), it will
+ return the index of the subexpression which is the left-hand-side
+ of the struct operation at EXPOUT_LAST_STRUCT. */
-extern void write_exp_elt_type PARAMS ((struct type *));
+extern int prefixify_expression (struct expression *expr);
-extern void write_exp_elt_intern PARAMS ((struct internalvar *));
+extern void write_exp_elt_opcode (struct parser_state *, enum exp_opcode);
-extern void write_exp_string PARAMS ((struct stoken));
+extern void write_exp_elt_sym (struct parser_state *, struct symbol *);
-extern void write_exp_bitstring PARAMS ((struct stoken));
+extern void write_exp_elt_longcst (struct parser_state *, LONGEST);
-extern void write_exp_elt_block PARAMS ((struct block *));
+extern void write_exp_elt_dblcst (struct parser_state *, DOUBLEST);
-extern void write_exp_msymbol PARAMS ((struct minimal_symbol *,
- struct type *, struct type *));
+extern void write_exp_elt_decfloatcst (struct parser_state *, gdb_byte *);
-extern void write_dollar_variable PARAMS ((struct stoken str));
+extern void write_exp_elt_type (struct parser_state *, struct type *);
-extern void
-start_arglist PARAMS ((void));
+extern void write_exp_elt_intern (struct parser_state *, struct internalvar *);
-extern int
-end_arglist PARAMS ((void));
+extern void write_exp_string (struct parser_state *, struct stoken);
-extern char *
-copy_name PARAMS ((struct stoken));
+void write_exp_string_vector (struct parser_state *, int type,
+ struct stoken_vector *vec);
-extern void
-push_type PARAMS ((enum type_pieces));
+extern void write_exp_bitstring (struct parser_state *, struct stoken);
-extern void
-push_type_int PARAMS ((int));
+extern void write_exp_elt_block (struct parser_state *, const struct block *);
-extern enum type_pieces
-pop_type PARAMS ((void));
+extern void write_exp_elt_objfile (struct parser_state *,
+ struct objfile *objfile);
-extern int
-pop_type_int PARAMS ((void));
+extern void write_exp_msymbol (struct parser_state *,
+ struct bound_minimal_symbol);
-extern int
-length_of_subexp PARAMS ((struct expression *, int));
+extern void write_dollar_variable (struct parser_state *, struct stoken str);
-extern struct type *follow_types PARAMS ((struct type *));
+extern void mark_struct_expression (struct parser_state *);
-/* During parsing of a C expression, the pointer to the next character
- is in this variable. */
+extern const char *find_template_name_end (const char *);
+
+extern void start_arglist (void);
+
+extern int end_arglist (void);
+
+extern char *copy_name (struct stoken);
+
+extern void insert_type (enum type_pieces);
+
+extern void push_type (enum type_pieces);
+
+extern void push_type_int (int);
-extern char *lexptr;
+extern void insert_type_address_space (struct parser_state *, char *);
-/* Tokens that refer to names do so with explicit pointer and length,
- so they can share the storage that lexptr is parsing.
+extern enum type_pieces pop_type (void);
- When it is necessary to pass a name to a function that expects
- a null-terminated string, the substring is copied out
- into a block of storage that namecopy points to.
+extern int pop_type_int (void);
- namecopy is allocated once, guaranteed big enough, for each parsing. */
+extern struct type_stack *get_type_stack (void);
-extern char *namecopy;
+extern struct type_stack *append_type_stack (struct type_stack *to,
+ struct type_stack *from);
+
+extern void push_type_stack (struct type_stack *stack);
+
+extern void type_stack_cleanup (void *arg);
+
+extern void push_typelist (VEC (type_ptr) *typelist);
+
+extern int length_of_subexp (struct expression *, int);
+
+extern int dump_subexp (struct expression *, struct ui_file *, int);
+
+extern int dump_subexp_body_standard (struct expression *,
+ struct ui_file *, int);
+
+extern void operator_length (const struct expression *, int, int *, int *);
+
+extern void operator_length_standard (const struct expression *, int, int *,
+ int *);
+
+extern int operator_check_standard (struct expression *exp, int pos,
+ int (*objfile_func)
+ (struct objfile *objfile, void *data),
+ void *data);
+
+extern char *op_name_standard (enum exp_opcode);
+
+extern struct type *follow_types (struct type *);
+
+extern void null_post_parser (struct expression **, int);
+
+extern int parse_float (const char *p, int len, DOUBLEST *d,
+ const char **suffix);
+
+extern int parse_c_float (struct gdbarch *gdbarch, const char *p, int len,
+ DOUBLEST *d, struct type **t);
+
+/* During parsing of a C expression, the pointer to the next character
+ is in this variable. */
+
+extern const char *lexptr;
+
+/* After a token has been recognized, this variable points to it.
+ Currently used only for error reporting. */
+extern const char *prev_lexptr;
/* Current depth in parentheses within the expression. */
they are used as the "surrounding precedence" to force
various kinds of things to be parenthesized. */
enum precedence
-{ PREC_NULL, PREC_COMMA, PREC_ABOVE_COMMA, PREC_ASSIGN, PREC_LOGICAL_OR,
- PREC_LOGICAL_AND, PREC_BITWISE_IOR, PREC_BITWISE_AND, PREC_BITWISE_XOR,
- PREC_EQUAL, PREC_ORDER, PREC_SHIFT, PREC_ADD, PREC_MUL, PREC_REPEAT,
- PREC_HYPER, PREC_PREFIX, PREC_SUFFIX, PREC_BUILTIN_FUNCTION };
+ {
+ PREC_NULL, PREC_COMMA, PREC_ABOVE_COMMA, PREC_ASSIGN, PREC_LOGICAL_OR,
+ PREC_LOGICAL_AND, PREC_BITWISE_IOR, PREC_BITWISE_AND, PREC_BITWISE_XOR,
+ PREC_EQUAL, PREC_ORDER, PREC_SHIFT, PREC_ADD, PREC_MUL, PREC_REPEAT,
+ PREC_HYPER, PREC_PREFIX, PREC_SUFFIX, PREC_BUILTIN_FUNCTION
+ };
/* Table mapping opcodes into strings for printing operators
and precedences of the operators. */
struct op_print
-{
- char *string;
- enum exp_opcode opcode;
- /* Precedence of operator. These values are used only by comparisons. */
- enum precedence precedence;
-
- /* For a binary operator: 1 iff right associate.
- For a unary operator: 1 iff postfix. */
- int right_assoc;
-};
+ {
+ char *string;
+ enum exp_opcode opcode;
+ /* Precedence of operator. These values are used only by comparisons. */
+ enum precedence precedence;
+
+ /* For a binary operator: 1 iff right associate.
+ For a unary operator: 1 iff postfix. */
+ int right_assoc;
+ };
+
+/* Information needed to print, prefixify, and evaluate expressions for
+ a given language. */
+
+struct exp_descriptor
+ {
+ /* Print subexpression. */
+ void (*print_subexp) (struct expression *, int *, struct ui_file *,
+ enum precedence);
+
+ /* Returns number of exp_elements needed to represent an operator and
+ the number of subexpressions it takes. */
+ void (*operator_length) (const struct expression*, int, int*, int *);
+
+ /* Call OBJFILE_FUNC for any objfile found being referenced by the
+ single operator of EXP at position POS. Operator parameters are
+ located at positive (POS + number) offsets in EXP. OBJFILE_FUNC
+ should never be called with NULL OBJFILE. OBJFILE_FUNC should
+ get passed an arbitrary caller supplied DATA pointer. If it
+ returns non-zero value then (any other) non-zero value should be
+ immediately returned to the caller. Otherwise zero should be
+ returned. */
+ int (*operator_check) (struct expression *exp, int pos,
+ int (*objfile_func) (struct objfile *objfile,
+ void *data),
+ void *data);
+
+ /* Name of this operator for dumping purposes.
+ The returned value should never be NULL, even if EXP_OPCODE is
+ an unknown opcode (a string containing an image of the numeric
+ value of the opcode can be returned, for instance). */
+ char *(*op_name) (enum exp_opcode);
+
+ /* Dump the rest of this (prefix) expression after the operator
+ itself has been printed. See dump_subexp_body_standard in
+ (expprint.c). */
+ int (*dump_subexp_body) (struct expression *, struct ui_file *, int);
+
+ /* Evaluate an expression. */
+ struct value *(*evaluate_exp) (struct type *, struct expression *,
+ int *, enum noside);
+ };
+
+
+/* Default descriptor containing standard definitions of all
+ elements. */
+extern const struct exp_descriptor exp_descriptor_standard;
+
+/* Functions used by language-specific extended operators to (recursively)
+ print/dump subexpressions. */
+
+extern void print_subexp (struct expression *, int *, struct ui_file *,
+ enum precedence);
+
+extern void print_subexp_standard (struct expression *, int *,
+ struct ui_file *, enum precedence);
+
+/* Function used to avoid direct calls to fprintf
+ in the code generated by the bison parser. */
+
+extern void parser_fprintf (FILE *, const char *, ...) ATTRIBUTE_PRINTF (2, 3);
+
+extern int exp_uses_objfile (struct expression *exp, struct objfile *objfile);
+
+extern void mark_completion_tag (enum type_code, const char *ptr,
+ int length);
+
+/* Reallocate the `expout' pointer inside PS so that it can accommodate
+ at least LENELT expression elements. This function does nothing if
+ there is enough room for the elements. */
+
+extern void increase_expout_size (struct parser_state *ps, size_t lenelt);
+
+#endif /* PARSER_DEFS_H */
-#endif /* PARSER_DEFS_H */
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