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103 lines
3.8 KiB
103 lines
3.8 KiB
#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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