#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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