/* Parser definitions for GDB.
- Copyright (C) 1986-2017 Free Software Foundation, Inc.
+ Copyright (C) 1986-2019 Free Software Foundation, Inc.
Modified from expread.y by the Department of Computer Science at the
State University of New York at Buffalo.
#if !defined (PARSER_DEFS_H)
#define PARSER_DEFS_H 1
-#include "vec.h"
+#include "common/vec.h"
#include "expression.h"
struct block;
/* Resize the allocated expression to the correct size, and return
it as an expression_up -- passing ownership to the caller. */
- expression_up release ();
+ ATTRIBUTE_UNUSED_RESULT expression_up release ();
/* The size of the expression above. */
then look up the macro definitions active at that point. */
extern CORE_ADDR expression_context_pc;
+/* While parsing expressions we need to track the innermost lexical block
+ that we encounter. In some situations we need to track the innermost
+ block just for symbols, and in other situations we want to track the
+ innermost block for symbols and registers. These flags are used by the
+ innermost block tracker to control which blocks we consider for the
+ innermost block. These flags can be combined together as needed. */
+
+enum innermost_block_tracker_type
+{
+ /* Track the innermost block for symbols within an expression. */
+ INNERMOST_BLOCK_FOR_SYMBOLS = (1 << 0),
+
+ /* Track the innermost block for registers within an expression. */
+ INNERMOST_BLOCK_FOR_REGISTERS = (1 << 1)
+};
+DEF_ENUM_FLAGS_TYPE (enum innermost_block_tracker_type,
+ innermost_block_tracker_types);
+
+/* When parsing expressions we track the innermost block that was
+ referenced. */
+
+class innermost_block_tracker
+{
+public:
+ innermost_block_tracker ()
+ : m_types (INNERMOST_BLOCK_FOR_SYMBOLS),
+ m_innermost_block (NULL)
+ { /* Nothing. */ }
+
+ /* Reset the currently stored innermost block. Usually called before
+ parsing a new expression. As the most common case is that we only
+ want to gather the innermost block for symbols in an expression, this
+ becomes the default block tracker type. */
+ void reset (innermost_block_tracker_types t = INNERMOST_BLOCK_FOR_SYMBOLS)
+ {
+ m_types = t;
+ m_innermost_block = NULL;
+ }
+
+ /* Update the stored innermost block if the new block B is more inner
+ than the currently stored block, or if no block is stored yet. The
+ type T tells us whether the block B was for a symbol or for a
+ register. The stored innermost block is only updated if the type T is
+ a type we are interested in, the types we are interested in are held
+ in M_TYPES and set during RESET. */
+ void update (const struct block *b, innermost_block_tracker_types t);
+
+ /* Overload of main UPDATE method which extracts the block from BS. */
+ void update (const struct block_symbol &bs)
+ {
+ update (bs.block, INNERMOST_BLOCK_FOR_SYMBOLS);
+ }
+
+ /* Return the stored innermost block. Can be nullptr if no symbols or
+ registers were found during an expression parse, and so no innermost
+ block was defined. */
+ const struct block *block () const
+ {
+ return m_innermost_block;
+ }
+
+private:
+ /* The type of innermost block being looked for. */
+ innermost_block_tracker_types m_types;
+
+ /* The currently stored innermost block found while parsing an
+ expression. */
+ const struct block *m_innermost_block;
+};
+
/* The innermost context required by the stack and register variables
- we've encountered so far. */
-extern const struct block *innermost_block;
+ we've encountered so far. This should be cleared before parsing an
+ expression, and queried once the parse is complete. */
+extern innermost_block_tracker innermost_block;
/* Number of arguments seen so far in innermost function call. */
extern int arglist_len;
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_const,
tp_volatile,
tp_space_identifier,
- tp_type_stack
+ tp_type_stack,
+ tp_kind
};
/* 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;
+ std::vector<struct type *> *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;
+ std::vector<union type_stack_elt> elements;
};
/* Reverse an expression from suffix form (in which it is constructed)
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 void push_typelist (std::vector<struct type *> *typelist);
extern int dump_subexp (struct expression *, struct ui_file *, int);
projects / deliverable / binutils-gdb.git / blobdiff