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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 */
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