/* Parser definitions for GDB.
- Copyright (C) 1986, 1989, 1990, 1991 Free Software Foundation, Inc.
+
+ Copyright (C) 1986-2017 Free Software Foundation, Inc.
+
Modified from expread.y by the Department of Computer Science at the
State University of New York at Buffalo.
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
+ 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,
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. */
+ 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"
+
+struct block;
+struct language_defn;
+struct internalvar;
+
+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;
-extern struct std_regs *std_regs;
-extern unsigned num_std_regs;
+ /* The size of the expression above. */
-extern struct expression *expout;
-extern int expout_size;
-extern int expout_ptr;
+ 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;
-/* The innermost context required by the stack and register variables
- we've encountered so far. */
-extern struct block *innermost_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 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;
+/* The innermost context required by the stack and register variables
+ we've encountered so far. */
+extern const struct block *innermost_block;
/* 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;
struct symtoken
{
struct stoken stoken;
- struct symbol *sym;
+ struct block_symbol sym;
int is_a_field_of_this;
};
+struct objc_class_str
+ {
+ struct stoken stoken;
+ struct type *type;
+ int theclass;
+ };
+
+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_rvalue_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;
+ struct type_stack *stack_val;
+ VEC (type_ptr) *typelist_val;
};
-extern union type_stack_elt *type_stack;
-extern int type_stack_depth, type_stack_size;
-extern void write_exp_elt PARAMS ((union exp_element));
+/* The type stack is an instance of this structure. */
-extern void write_exp_elt_opcode PARAMS ((enum exp_opcode));
+struct type_stack
+{
+ /* Elements on the stack. */
+ union type_stack_elt *elements;
+ /* Current stack depth. */
+ int depth;
+ /* Allocated size of stack. */
+ int size;
+};
-extern void write_exp_elt_sym PARAMS ((struct symbol *));
+/* 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_longcst PARAMS ((LONGEST));
+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_dblcst PARAMS ((DOUBLEST));
+/* 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_type PARAMS ((struct type *));
+extern void reallocate_expout (struct parser_state *ps);
-extern void write_exp_elt_intern PARAMS ((struct internalvar *));
+/* 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_string PARAMS ((struct stoken));
+extern int prefixify_expression (struct expression *expr);
-extern void write_exp_bitstring PARAMS ((struct stoken));
+extern void write_exp_elt_opcode (struct parser_state *, enum exp_opcode);
-extern void write_exp_elt_block PARAMS ((struct block *));
+extern void write_exp_elt_sym (struct parser_state *, struct symbol *);
-extern void write_exp_msymbol PARAMS ((struct minimal_symbol *,
- struct type *, struct type *));
+extern void write_exp_elt_longcst (struct parser_state *, LONGEST);
-extern void write_dollar_variable PARAMS ((struct stoken str));
+extern void write_exp_elt_dblcst (struct parser_state *, DOUBLEST);
-extern struct symbol *parse_nested_classes_for_hpacc PARAMS ((char *, int, char **, int *, char **));
+extern void write_exp_elt_decfloatcst (struct parser_state *, gdb_byte *);
-extern char *find_template_name_end PARAMS ((char *));
+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 char *lexptr;
+extern void push_type_int (int);
-/* Tokens that refer to names do so with explicit pointer and length,
- so they can share the storage that lexptr is parsing.
+extern void insert_type_address_space (struct parser_state *, char *);
- 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 enum type_pieces pop_type (void);
- namecopy is allocated once, guaranteed big enough, for each parsing. */
+extern int pop_type_int (void);
-extern char *namecopy;
+extern struct type_stack *get_type_stack (void);
+
+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 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 const 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. */
struct op_print
{
- char *string;
+ const 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. */
+ For a unary operator: 1 iff postfix. */
int right_assoc;
};
-/* The generic method for targets to specify how their registers are
- named. The mapping can be derived from three sources:
- REGISTER_NAME; std_regs; or a target specific alias hook. */
+/* 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). */
+ const 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 int target_map_name_to_register PARAMS ((char *, int));
+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 */
+
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