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104 lines
3.8 KiB
104 lines
3.8 KiB
5 years ago
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#ifndef Py_SYMTABLE_H
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#define Py_SYMTABLE_H
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#ifdef __cplusplus
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extern "C" {
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#endif
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typedef enum _block_type { FunctionBlock, ClassBlock, ModuleBlock }
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_Py_block_ty;
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struct _symtable_entry;
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struct symtable {
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const char *st_filename; /* name of file being compiled */
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struct _symtable_entry *st_cur; /* current symbol table entry */
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struct _symtable_entry *st_top; /* module entry */
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PyObject *st_symbols; /* dictionary of symbol table entries */
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PyObject *st_stack; /* stack of namespace info */
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PyObject *st_global; /* borrowed ref to MODULE in st_symbols */
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int st_nblocks; /* number of blocks */
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PyObject *st_private; /* name of current class or NULL */
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int st_tmpname; /* temporary name counter */
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PyFutureFeatures *st_future; /* module's future features */
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};
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typedef struct _symtable_entry {
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PyObject_HEAD
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PyObject *ste_id; /* int: key in st_symbols */
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PyObject *ste_symbols; /* dict: name to flags */
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PyObject *ste_name; /* string: name of block */
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PyObject *ste_varnames; /* list of variable names */
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PyObject *ste_children; /* list of child ids */
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_Py_block_ty ste_type; /* module, class, or function */
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int ste_unoptimized; /* false if namespace is optimized */
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unsigned ste_nested : 1; /* true if block is nested */
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unsigned ste_free : 1; /* true if block has free variables */
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unsigned ste_child_free : 1; /* true if a child block has free vars,
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including free refs to globals */
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unsigned ste_generator : 1; /* true if namespace is a generator */
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unsigned ste_varargs : 1; /* true if block has varargs */
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unsigned ste_varkeywords : 1; /* true if block has varkeywords */
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unsigned ste_returns_value : 1; /* true if namespace uses return with
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an argument */
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int ste_lineno; /* first line of block */
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int ste_opt_lineno; /* lineno of last exec or import * */
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int ste_tmpname; /* counter for listcomp temp vars */
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struct symtable *ste_table;
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} PySTEntryObject;
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PyAPI_DATA(PyTypeObject) PySTEntry_Type;
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#define PySTEntry_Check(op) ((op)->ob_type == &PySTEntry_Type)
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PyAPI_FUNC(int) PyST_GetScope(PySTEntryObject *, PyObject *);
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PyAPI_FUNC(struct symtable *) PySymtable_Build(mod_ty, const char *,
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PyFutureFeatures *);
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PyAPI_FUNC(PySTEntryObject *) PySymtable_Lookup(struct symtable *, void *);
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PyAPI_FUNC(void) PySymtable_Free(struct symtable *);
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/* Flags for def-use information */
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#define DEF_GLOBAL 1 /* global stmt */
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#define DEF_LOCAL 2 /* assignment in code block */
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#define DEF_PARAM 2<<1 /* formal parameter */
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#define USE 2<<2 /* name is used */
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#define DEF_STAR 2<<3 /* parameter is star arg */
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#define DEF_DOUBLESTAR 2<<4 /* parameter is star-star arg */
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#define DEF_INTUPLE 2<<5 /* name defined in tuple in parameters */
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#define DEF_FREE 2<<6 /* name used but not defined in nested block */
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#define DEF_FREE_GLOBAL 2<<7 /* free variable is actually implicit global */
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#define DEF_FREE_CLASS 2<<8 /* free variable from class's method */
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#define DEF_IMPORT 2<<9 /* assignment occurred via import */
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#define DEF_BOUND (DEF_LOCAL | DEF_PARAM | DEF_IMPORT)
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/* GLOBAL_EXPLICIT and GLOBAL_IMPLICIT are used internally by the symbol
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table. GLOBAL is returned from PyST_GetScope() for either of them.
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It is stored in ste_symbols at bits 12-14.
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*/
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#define SCOPE_OFF 11
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#define SCOPE_MASK 7
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#define LOCAL 1
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#define GLOBAL_EXPLICIT 2
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#define GLOBAL_IMPLICIT 3
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#define FREE 4
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#define CELL 5
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/* The following three names are used for the ste_unoptimized bit field */
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#define OPT_IMPORT_STAR 1
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#define OPT_EXEC 2
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#define OPT_BARE_EXEC 4
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#define OPT_TOPLEVEL 8 /* top-level names, including eval and exec */
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#define GENERATOR 1
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#define GENERATOR_EXPRESSION 2
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#ifdef __cplusplus
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}
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#endif
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#endif /* !Py_SYMTABLE_H */
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