mirror of
https://github.com/python/cpython.git
synced 2025-10-31 13:41:24 +00:00
100 lines
3.6 KiB
C
100 lines
3.6 KiB
C
#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 */
|
|
int st_nested_scopes; /* true if nested scopes are enabled */
|
|
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 */
|