7 typedef enum _block_type
{ FunctionBlock
, ClassBlock
, ModuleBlock
}
10 struct _symtable_entry
;
13 const char *st_filename
; /* name of file being compiled */
14 struct _symtable_entry
*st_cur
; /* current symbol table entry */
15 struct _symtable_entry
*st_top
; /* module entry */
16 PyObject
*st_symbols
; /* dictionary of symbol table entries */
17 PyObject
*st_stack
; /* stack of namespace info */
18 PyObject
*st_global
; /* borrowed ref to MODULE in st_symbols */
19 int st_nblocks
; /* number of blocks */
20 PyObject
*st_private
; /* name of current class or NULL */
21 int st_tmpname
; /* temporary name counter */
22 PyFutureFeatures
*st_future
; /* module's future features */
25 typedef struct _symtable_entry
{
27 PyObject
*ste_id
; /* int: key in st_symbols */
28 PyObject
*ste_symbols
; /* dict: name to flags */
29 PyObject
*ste_name
; /* string: name of block */
30 PyObject
*ste_varnames
; /* list of variable names */
31 PyObject
*ste_children
; /* list of child ids */
32 _Py_block_ty ste_type
; /* module, class, or function */
33 int ste_unoptimized
; /* false if namespace is optimized */
34 unsigned ste_nested
: 1; /* true if block is nested */
35 unsigned ste_free
: 1; /* true if block has free variables */
36 unsigned ste_child_free
: 1; /* true if a child block has free vars,
37 including free refs to globals */
38 unsigned ste_generator
: 1; /* true if namespace is a generator */
39 unsigned ste_varargs
: 1; /* true if block has varargs */
40 unsigned ste_varkeywords
: 1; /* true if block has varkeywords */
41 int ste_lineno
; /* first line of block */
42 int ste_opt_lineno
; /* lineno of last exec or import * */
43 int ste_tmpname
; /* counter for listcomp temp vars */
44 struct symtable
*ste_table
;
47 PyAPI_DATA(PyTypeObject
) PySTEntry_Type
;
49 #define PySTEntry_Check(op) ((op)->ob_type == &PySTEntry_Type)
51 PyAPI_FUNC(PySTEntryObject
*) \
52 PySTEntry_New(struct symtable
*, identifier
, _Py_block_ty
, void *, int);
53 PyAPI_FUNC(int) PyST_GetScope(PySTEntryObject
*, PyObject
*);
55 PyAPI_FUNC(struct symtable
*) PySymtable_Build(mod_ty
, const char *,
57 PyAPI_FUNC(PySTEntryObject
*) PySymtable_Lookup(struct symtable
*, void *);
59 PyAPI_FUNC(void) PySymtable_Free(struct symtable
*);
61 /* Flags for def-use information */
63 #define DEF_GLOBAL 1 /* global stmt */
64 #define DEF_LOCAL 2 /* assignment in code block */
65 #define DEF_PARAM 2<<1 /* formal parameter */
66 #define USE 2<<2 /* name is used */
67 #define DEF_STAR 2<<3 /* parameter is star arg */
68 #define DEF_DOUBLESTAR 2<<4 /* parameter is star-star arg */
69 #define DEF_INTUPLE 2<<5 /* name defined in tuple in parameters */
70 #define DEF_FREE 2<<6 /* name used but not defined in nested block */
71 #define DEF_FREE_GLOBAL 2<<7 /* free variable is actually implicit global */
72 #define DEF_FREE_CLASS 2<<8 /* free variable from class's method */
73 #define DEF_IMPORT 2<<9 /* assignment occurred via import */
75 #define DEF_BOUND (DEF_LOCAL | DEF_PARAM | DEF_IMPORT)
77 /* GLOBAL_EXPLICIT and GLOBAL_IMPLICIT are used internally by the symbol
78 table. GLOBAL is returned from PyST_GetScope() for either of them.
79 It is stored in ste_symbols at bits 12-14.
85 #define GLOBAL_EXPLICIT 2
86 #define GLOBAL_IMPLICIT 3
90 /* The following three names are used for the ste_unoptimized bit field */
91 #define OPT_IMPORT_STAR 1
93 #define OPT_BARE_EXEC 4
94 #define OPT_TOPLEVEL 8 /* top-level names, including eval and exec */
97 #define GENERATOR_EXPRESSION 2
102 #endif /* !Py_SYMTABLE_H */