Mercurial > cpython-lru_cache-weakref

annotate Include/symtable.h @ 80661:94de77bd0b4b 2.7

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Issue #16194: document imp.load_dynamic problems when read several extension modules from the same binary object file.
author Andrew Svetlov <andrew.svetlov@gmail.com>
date Thu, 29 Nov 2012 19:51:28 +0200
parents b36cb4602e21
children
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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 PyFutureFeatures *st_future; /* module's future features */
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23 };
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24
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25 typedef struct _symtable_entry {
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26 PyObject_HEAD
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27 PyObject *ste_id; /* int: key in st_symbols */
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28 PyObject *ste_symbols; /* dict: name to flags */
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29 PyObject *ste_name; /* string: name of block */
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30 PyObject *ste_varnames; /* list of variable names */
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31 PyObject *ste_children; /* list of child ids */
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32 _Py_block_ty ste_type; /* module, class, or function */
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33 int ste_unoptimized; /* false if namespace is optimized */
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34 int ste_nested; /* true if block is nested */
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35 unsigned ste_free : 1; /* true if block has free variables */
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36 unsigned ste_child_free : 1; /* true if a child block has free vars,
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37 including free refs to globals */
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38 unsigned ste_generator : 1; /* true if namespace is a generator */
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39 unsigned ste_varargs : 1; /* true if block has varargs */
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40 unsigned ste_varkeywords : 1; /* true if block has varkeywords */
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41 unsigned ste_returns_value : 1; /* true if namespace uses return with
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42 an argument */
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43 int ste_lineno; /* first line of block */
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44 int ste_opt_lineno; /* lineno of last exec or import * */
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45 int ste_tmpname; /* counter for listcomp temp vars */
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46 struct symtable *ste_table;
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47 } PySTEntryObject;
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48
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49 PyAPI_DATA(PyTypeObject) PySTEntry_Type;
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50
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51 #define PySTEntry_Check(op) (Py_TYPE(op) == &PySTEntry_Type)
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52
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53 PyAPI_FUNC(int) PyST_GetScope(PySTEntryObject *, PyObject *);
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55 PyAPI_FUNC(struct symtable *) PySymtable_Build(mod_ty, const char *,
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56 PyFutureFeatures *);
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57 PyAPI_FUNC(PySTEntryObject *) PySymtable_Lookup(struct symtable *, void *);
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58
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59 PyAPI_FUNC(void) PySymtable_Free(struct symtable *);
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60
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61 /* Flags for def-use information */
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62
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63 #define DEF_GLOBAL 1 /* global stmt */
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64 #define DEF_LOCAL 2 /* assignment in code block */
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65 #define DEF_PARAM 2<<1 /* formal parameter */
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66 #define USE 2<<2 /* name is used */
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67 #define DEF_FREE 2<<3 /* name used but not defined in nested block */
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68 #define DEF_FREE_CLASS 2<<4 /* free variable from class's method */
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69 #define DEF_IMPORT 2<<5 /* assignment occurred via import */
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70
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71 #define DEF_BOUND (DEF_LOCAL | DEF_PARAM | DEF_IMPORT)
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72
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73 /* GLOBAL_EXPLICIT and GLOBAL_IMPLICIT are used internally by the symbol
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74 table. GLOBAL is returned from PyST_GetScope() for either of them.
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75 It is stored in ste_symbols at bits 12-14.
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76 */
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77 #define SCOPE_OFF 11
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78 #define SCOPE_MASK 7
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79
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80 #define LOCAL 1
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81 #define GLOBAL_EXPLICIT 2
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82 #define GLOBAL_IMPLICIT 3
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83 #define FREE 4
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84 #define CELL 5
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85
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86 /* The following three names are used for the ste_unoptimized bit field */
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87 #define OPT_IMPORT_STAR 1
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88 #define OPT_EXEC 2
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89 #define OPT_BARE_EXEC 4
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90 #define OPT_TOPLEVEL 8 /* top-level names, including eval and exec */
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91
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92 #define GENERATOR 1
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93 #define GENERATOR_EXPRESSION 2
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94
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95 #ifdef __cplusplus
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96 }
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97 #endif
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98 #endif /* !Py_SYMTABLE_H */