#ifndef Py_SYMTABLE_H#define Py_SYMTABLE_H #ifdef __cplusplusextern "C" {#endif typedef enum _block_type { FunctionBlock, ClassBlock, ModuleBlock }    _Py_block_ty; struct _symtable_entry; struct symtable {	const char *st_filename; /* name of file being compiled */	struct _symtable_entry *st_cur; /* current symbol table entry */	struct _symtable_entry *st_top; /* module entry */	PyObject *st_symbols;    /* dictionary of symbol table entries */        PyObject *st_stack;      /* stack of namespace info */	PyObject *st_global;     /* borrowed ref to MODULE in st_symbols */	int st_nblocks;          /* number of blocks */	PyObject *st_private;        /* name of current class or NULL */        int st_tmpname;          /* temporary name counter */	PyFutureFeatures *st_future; /* module's future features */}; typedef struct _symtable_entry {	PyObject_HEAD	PyObject *ste_id;        /* int: key in st_symbols */	PyObject *ste_symbols;   /* dict: name to flags */	PyObject *ste_name;      /* string: name of block */	PyObject *ste_varnames;  /* list of variable names */	PyObject *ste_children;  /* list of child ids */	_Py_block_ty ste_type;   /* module, class, or function */	int ste_unoptimized;     /* false if namespace is optimized */	unsigned ste_nested : 1;      /* true if block is nested */	unsigned ste_free : 1;        /* true if block has free variables */	unsigned ste_child_free : 1;  /* true if a child block has free vars,				         including free refs to globals */	unsigned ste_generator : 1;   /* true if namespace is a generator */	unsigned ste_varargs : 1;     /* true if block has varargs */	unsigned ste_varkeywords : 1; /* true if block has varkeywords */	unsigned ste_returns_value : 1;  /* true if namespace uses return with	                                    an argument */	int ste_lineno;          /* first line of block */	int ste_opt_lineno;      /* lineno of last exec or import * */	int ste_tmpname;         /* counter for listcomp temp vars */	struct symtable *ste_table;} PySTEntryObject; PyAPI_DATA(PyTypeObject) PySTEntry_Type; #define PySTEntry_Check(op) ((op)->ob_type == &PySTEntry_Type) PyAPI_FUNC(int) PyST_GetScope(PySTEntryObject *, PyObject *); PyAPI_FUNC(struct symtable *) PySymtable_Build(mod_ty, const char *, 					      PyFutureFeatures *);PyAPI_FUNC(PySTEntryObject *) PySymtable_Lookup(struct symtable *, void *); PyAPI_FUNC(void) PySymtable_Free(struct symtable *); /* Flags for def-use information */ #define DEF_GLOBAL 1           /* global stmt */#define DEF_LOCAL 2            /* assignment in code block */#define DEF_PARAM 2<<1         /* formal parameter */#define USE 2<<2               /* name is used */#define DEF_STAR 2<<3          /* parameter is star arg */#define DEF_DOUBLESTAR 2<<4    /* parameter is star-star arg */#define DEF_INTUPLE 2<<5       /* name defined in tuple in parameters */#define DEF_FREE 2<<6          /* name used but not defined in nested block */#define DEF_FREE_GLOBAL 2<<7   /* free variable is actually implicit global */#define DEF_FREE_CLASS 2<<8    /* free variable from class's method */#define DEF_IMPORT 2<<9        /* assignment occurred via import */ #define DEF_BOUND (DEF_LOCAL | DEF_PARAM | DEF_IMPORT) /* GLOBAL_EXPLICIT and GLOBAL_IMPLICIT are used internally by the symbol   table.  GLOBAL is returned from PyST_GetScope() for either of them.    It is stored in ste_symbols at bits 12-14.*/#define SCOPE_OFF 11#define SCOPE_MASK 7 #define LOCAL 1#define GLOBAL_EXPLICIT 2#define GLOBAL_IMPLICIT 3#define FREE 4#define CELL 5 /* The following three names are used for the ste_unoptimized bit field */#define OPT_IMPORT_STAR 1#define OPT_EXEC 2#define OPT_BARE_EXEC 4#define OPT_TOPLEVEL 8  /* top-level names, including eval and exec */ #define GENERATOR 1#define GENERATOR_EXPRESSION 2 #ifdef __cplusplus}#endif#endif /* !Py_SYMTABLE_H */