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- #ifndef Py_SYMTABLE_H
- #define Py_SYMTABLE_H
- #ifdef __cplusplus
- extern "C" {
- #endif
-
- /* A symbol table is constructed each time PyNode_Compile() is
- called. The table walks the entire parse tree and identifies each
- use or definition of a variable.
-
- The symbol table contains a dictionary for each code block in a
- module: The symbol dictionary for the block. They keys of these
- dictionaries are the name of all variables used or defined in the
- block; the integer values are used to store several flags,
- e.g. DEF_PARAM indicates that a variable is a parameter to a
- function.
- */
-
- struct _symtable_entry;
-
- struct symtable {
- int st_pass; /* pass == 1 or 2 */
- char *st_filename; /* name of file being compiled */
- struct _symtable_entry *st_cur; /* current symbol table 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_nscopes; /* number of scopes */
- int st_errors; /* number of errors */
- char *st_private; /* name of current class or NULL */
- int st_tmpname; /* temporary name counter */
- 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 scope */
- PyObject *ste_varnames; /* list of variable names */
- PyObject *ste_children; /* list of child ids */
- int ste_type; /* module, class, or function */
- int ste_lineno; /* first line of scope */
- int ste_optimized; /* true if namespace can't be optimized */
- int ste_nested; /* true if scope is nested */
- int ste_child_free; /* true if a child scope has free variables,
- including free refs to globals */
- int ste_generator; /* true if namespace is a generator */
- int ste_opt_lineno; /* lineno of last exec or import * */
- struct symtable *ste_table;
- } PySymtableEntryObject;
-
- extern DL_IMPORT(PyTypeObject) PySymtableEntry_Type;
-
- #define PySymtableEntry_Check(op) ((op)->ob_type == &PySymtableEntry_Type)
-
- extern DL_IMPORT(PyObject *) PySymtableEntry_New(struct symtable *,
- char *, int, int);
-
- DL_IMPORT(struct symtable *) PyNode_CompileSymtable(struct _node *, char *);
- DL_IMPORT(void) PySymtable_Free(struct symtable *);
-
-
- #define TOP "global"
-
- /* 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_STAR 2<<3 /* parameter is star arg */
- #define DEF_DOUBLESTAR 2<<4 /* parameter is star-star arg */
- #define DEF_INTUPLE 2<<5 /* name defined in tuple in parameters */
- #define DEF_FREE 2<<6 /* name used but not defined in nested scope */
- #define DEF_FREE_GLOBAL 2<<7 /* free variable is actually implicit global */
- #define DEF_FREE_CLASS 2<<8 /* free variable from class's method */
- #define DEF_IMPORT 2<<9 /* assignment occurred via import */
-
- #define DEF_BOUND (DEF_LOCAL | DEF_PARAM | DEF_IMPORT)
-
- #define TYPE_FUNCTION 1
- #define TYPE_CLASS 2
- #define TYPE_MODULE 3
-
- #define LOCAL 1
- #define GLOBAL_EXPLICIT 2
- #define GLOBAL_IMPLICIT 3
- #define FREE 4
- #define CELL 5
-
- #define OPT_IMPORT_STAR 1
- #define OPT_EXEC 2
- #define OPT_BARE_EXEC 4
-
- #ifdef __cplusplus
- }
- #endif
- #endif /* !Py_SYMTABLE_H */
-