| 1 | #ifndef Py_SYMTABLE_H
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| 2 | #define Py_SYMTABLE_H
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| 3 |
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| 4 | #ifdef __cplusplus
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| 5 | extern "C" {
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| 6 | #endif
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| 7 |
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| 8 | typedef enum _block_type { FunctionBlock, ClassBlock, ModuleBlock }
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| 9 | _Py_block_ty;
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| 10 |
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| 11 | struct _symtable_entry;
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| 12 |
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| 13 | struct symtable {
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| 14 | const char *st_filename; /* name of file being compiled */
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| 15 | struct _symtable_entry *st_cur; /* current symbol table entry */
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| 16 | struct _symtable_entry *st_top; /* module entry */
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| 17 | PyObject *st_symbols; /* dictionary of symbol table entries */
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| 18 | PyObject *st_stack; /* stack of namespace info */
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| 19 | PyObject *st_global; /* borrowed ref to MODULE in st_symbols */
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| 20 | int st_nblocks; /* number of blocks */
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| 21 | PyObject *st_private; /* name of current class or NULL */
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| 22 | int st_tmpname; /* temporary name counter */
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| 23 | PyFutureFeatures *st_future; /* module's future features */
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| 24 | };
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| 25 |
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| 26 | typedef struct _symtable_entry {
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| 27 | PyObject_HEAD
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| 28 | PyObject *ste_id; /* int: key in st_symbols */
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| 29 | PyObject *ste_symbols; /* dict: name to flags */
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| 30 | PyObject *ste_name; /* string: name of block */
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| 31 | PyObject *ste_varnames; /* list of variable names */
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| 32 | PyObject *ste_children; /* list of child ids */
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| 33 | _Py_block_ty ste_type; /* module, class, or function */
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| 34 | int ste_unoptimized; /* false if namespace is optimized */
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| 35 | int ste_nested; /* true if block is nested */
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| 36 | unsigned ste_free : 1; /* true if block has free variables */
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| 37 | unsigned ste_child_free : 1; /* true if a child block has free vars,
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| 38 | including free refs to globals */
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| 39 | unsigned ste_generator : 1; /* true if namespace is a generator */
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| 40 | unsigned ste_varargs : 1; /* true if block has varargs */
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| 41 | unsigned ste_varkeywords : 1; /* true if block has varkeywords */
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| 42 | unsigned ste_returns_value : 1; /* true if namespace uses return with
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| 43 | an argument */
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| 44 | int ste_lineno; /* first line of block */
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| 45 | int ste_opt_lineno; /* lineno of last exec or import * */
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| 46 | int ste_tmpname; /* counter for listcomp temp vars */
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| 47 | struct symtable *ste_table;
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| 48 | } PySTEntryObject;
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| 49 |
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| 50 | PyAPI_DATA(PyTypeObject) PySTEntry_Type;
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| 51 |
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| 52 | #define PySTEntry_Check(op) (Py_TYPE(op) == &PySTEntry_Type)
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| 53 |
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| 54 | PyAPI_FUNC(int) PyST_GetScope(PySTEntryObject *, PyObject *);
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| 55 |
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| 56 | PyAPI_FUNC(struct symtable *) PySymtable_Build(mod_ty, const char *,
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| 57 | PyFutureFeatures *);
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| 58 | PyAPI_FUNC(PySTEntryObject *) PySymtable_Lookup(struct symtable *, void *);
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| 59 |
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| 60 | PyAPI_FUNC(void) PySymtable_Free(struct symtable *);
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| 61 |
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| 62 | /* Flags for def-use information */
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| 63 |
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| 64 | #define DEF_GLOBAL 1 /* global stmt */
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| 65 | #define DEF_LOCAL 2 /* assignment in code block */
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| 66 | #define DEF_PARAM 2<<1 /* formal parameter */
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| 67 | #define USE 2<<2 /* name is used */
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| 68 | #define DEF_STAR 2<<3 /* parameter is star arg */
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| 69 | #define DEF_DOUBLESTAR 2<<4 /* parameter is star-star arg */
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| 70 | #define DEF_INTUPLE 2<<5 /* name defined in tuple in parameters */
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| 71 | #define DEF_FREE 2<<6 /* name used but not defined in nested block */
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| 72 | #define DEF_FREE_GLOBAL 2<<7 /* free variable is actually implicit global */
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| 73 | #define DEF_FREE_CLASS 2<<8 /* free variable from class's method */
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| 74 | #define DEF_IMPORT 2<<9 /* assignment occurred via import */
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| 75 |
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| 76 | #define DEF_BOUND (DEF_LOCAL | DEF_PARAM | DEF_IMPORT)
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| 77 |
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| 78 | /* GLOBAL_EXPLICIT and GLOBAL_IMPLICIT are used internally by the symbol
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| 79 | table. GLOBAL is returned from PyST_GetScope() for either of them.
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| 80 | It is stored in ste_symbols at bits 12-14.
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| 81 | */
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| 82 | #define SCOPE_OFF 11
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| 83 | #define SCOPE_MASK 7
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| 84 |
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| 85 | #define LOCAL 1
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| 86 | #define GLOBAL_EXPLICIT 2
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| 87 | #define GLOBAL_IMPLICIT 3
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| 88 | #define FREE 4
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| 89 | #define CELL 5
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| 90 |
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| 91 | /* The following three names are used for the ste_unoptimized bit field */
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| 92 | #define OPT_IMPORT_STAR 1
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| 93 | #define OPT_EXEC 2
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| 94 | #define OPT_BARE_EXEC 4
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| 95 | #define OPT_TOPLEVEL 8 /* top-level names, including eval and exec */
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| 96 |
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| 97 | #define GENERATOR 1
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| 98 | #define GENERATOR_EXPRESSION 2
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| 99 |
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| 100 | #ifdef __cplusplus
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| 101 | }
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| 102 | #endif
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| 103 | #endif /* !Py_SYMTABLE_H */
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