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#ifndef Py_SYMTABLE_H
#define Py_SYMTABLE_H
#ifdef __cplusplus
extern "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 */
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 */
int ste_nested; /* 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) (Py_TYPE(op) == &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_FREE 2<<3 /* name used but not defined in nested block */
#define DEF_FREE_CLASS 2<<4 /* free variable from class's method */
#define DEF_IMPORT 2<<5 /* 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 */