cpython/Include/symtable.h

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#ifndef Py_LIMITED_API
#ifndef Py_SYMTABLE_H
#define Py_SYMTABLE_H
#ifdef __cplusplus
extern "C" {
#endif
/* XXX(ncoghlan): This is a weird mix of public names and interpreter internal
* names.
*/
typedef enum _block_type { FunctionBlock, ClassBlock, ModuleBlock }
_Py_block_ty;
struct _symtable_entry;
struct symtable {
PyObject *st_filename; /* name of file being compiled,
decoded from the filesystem encoding */
struct _symtable_entry *st_cur; /* current symbol table entry */
struct _symtable_entry *st_top; /* symbol table entry for module */
PyObject *st_blocks; /* dict: map AST node addresses
* to symbol table entries */
PyObject *st_stack; /* list: stack of namespace info */
PyObject *st_global; /* borrowed ref to st_top->ste_symbols */
int st_nblocks; /* number of blocks used. kept for
consistency with the corresponding
compiler structure */
PyObject *st_private; /* name of current class or NULL */
PyFutureFeatures *st_future; /* module's future features that affect
the symbol table */
int recursion_depth; /* current recursion depth */
int recursion_limit; /* recursion limit */
};
typedef struct _symtable_entry {
PyObject_HEAD
PyObject *ste_id; /* int: key in ste_table->st_blocks */
PyObject *ste_symbols; /* dict: variable names to flags */
PyObject *ste_name; /* string: name of current block */
PyObject *ste_varnames; /* list of function parameters */
PyObject *ste_children; /* list of child blocks */
PyObject *ste_directives;/* locations of global and nonlocal statements */
_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 */
unsigned ste_needs_class_closure : 1; /* for class scopes, true if a
closure over __class__
should be created */
int ste_lineno; /* first line of block */
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int ste_col_offset; /* offset of first line of block */
int ste_opt_lineno; /* lineno of last exec or import * */
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int ste_opt_col_offset; /* offset 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 mod,
const char *filename, /* decoded from the filesystem encoding */
PyFutureFeatures *future);
PyAPI_FUNC(struct symtable *) PySymtable_BuildObject(
mod_ty mod,
PyObject *filename,
PyFutureFeatures *future);
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 DEF_NONLOCAL 2<<2 /* nonlocal stmt */
#define USE 2<<3 /* name is used */
Merged revisions 73376,73393,73398,73400,73404-73405,73409,73419-73421,73432,73457,73460,73485-73486,73488-73489,73501-73502,73513-73514 via svnmerge from svn+ssh://pythondev@svn.python.org/python/trunk ........ r73376 | benjamin.peterson | 2009-06-11 17:29:23 -0500 (Thu, 11 Jun 2009) | 1 line remove check for case handled in sub-function ........ r73393 | alexandre.vassalotti | 2009-06-12 13:56:57 -0500 (Fri, 12 Jun 2009) | 2 lines Clear reference to the static PyExc_RecursionErrorInst in _PyExc_Fini. ........ r73398 | alexandre.vassalotti | 2009-06-12 15:57:12 -0500 (Fri, 12 Jun 2009) | 3 lines Add const qualifier to PyErr_SetFromErrnoWithFilename and to PyErr_SetFromErrnoWithUnicodeFilename. ........ r73400 | alexandre.vassalotti | 2009-06-12 16:43:47 -0500 (Fri, 12 Jun 2009) | 2 lines Delete outdated make file for building the parser with MSVC 6. ........ r73404 | benjamin.peterson | 2009-06-12 20:40:00 -0500 (Fri, 12 Jun 2009) | 1 line keep the slice.step field as NULL if no step expression is given ........ r73405 | benjamin.peterson | 2009-06-12 22:46:30 -0500 (Fri, 12 Jun 2009) | 1 line prevent import statements from assigning to None ........ r73409 | benjamin.peterson | 2009-06-13 08:06:21 -0500 (Sat, 13 Jun 2009) | 1 line allow importing from a module named None if it has an 'as' clause ........ r73419 | benjamin.peterson | 2009-06-13 11:19:19 -0500 (Sat, 13 Jun 2009) | 1 line set Print.values to NULL if there are no values ........ r73420 | benjamin.peterson | 2009-06-13 12:08:53 -0500 (Sat, 13 Jun 2009) | 1 line give a better error message when deleting () ........ r73421 | benjamin.peterson | 2009-06-13 15:23:33 -0500 (Sat, 13 Jun 2009) | 1 line when no module is given in a 'from' relative import, make ImportFrom.module NULL ........ r73432 | amaury.forgeotdarc | 2009-06-14 16:20:40 -0500 (Sun, 14 Jun 2009) | 3 lines #6227: Because of a wrong indentation, the test was not testing what it should. Ensure that the snippet in doctest_aliases actually contains aliases. ........ r73457 | benjamin.peterson | 2009-06-16 18:13:09 -0500 (Tue, 16 Jun 2009) | 1 line add underscores ........ r73460 | benjamin.peterson | 2009-06-16 22:23:04 -0500 (Tue, 16 Jun 2009) | 1 line remove unused 'encoding' member from the compiler struct ........ r73485 | benjamin.peterson | 2009-06-19 17:07:47 -0500 (Fri, 19 Jun 2009) | 1 line remove duplicate test ........ r73486 | benjamin.peterson | 2009-06-19 17:09:17 -0500 (Fri, 19 Jun 2009) | 1 line add missing assertion #6313 ........ r73488 | benjamin.peterson | 2009-06-19 17:16:28 -0500 (Fri, 19 Jun 2009) | 1 line show that this one isn't used ........ r73489 | benjamin.peterson | 2009-06-19 17:21:12 -0500 (Fri, 19 Jun 2009) | 1 line use closures ........ r73501 | benjamin.peterson | 2009-06-21 18:01:07 -0500 (Sun, 21 Jun 2009) | 1 line don't need to add the name 'lambda' as assigned ........ r73502 | benjamin.peterson | 2009-06-21 18:03:36 -0500 (Sun, 21 Jun 2009) | 1 line remove tmpname support since it's no longer used ........ r73513 | benjamin.peterson | 2009-06-22 20:18:57 -0500 (Mon, 22 Jun 2009) | 1 line fix grammar ........ r73514 | benjamin.peterson | 2009-06-22 22:01:56 -0500 (Mon, 22 Jun 2009) | 1 line remove some unused symtable constants ........
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#define DEF_FREE 2<<4 /* name used but not defined in nested block */
#define DEF_FREE_CLASS 2<<5 /* free variable from class's method */
#define DEF_IMPORT 2<<6 /* assignment occurred via import */
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#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 12-15.
*/
#define SCOPE_OFFSET 11
#define SCOPE_MASK (DEF_GLOBAL | DEF_LOCAL | DEF_PARAM | DEF_NONLOCAL)
#define LOCAL 1
#define GLOBAL_EXPLICIT 2
#define GLOBAL_IMPLICIT 3
#define FREE 4
#define CELL 5
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/* The following two names are used for the ste_unoptimized bit field */
#define OPT_IMPORT_STAR 1
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#define OPT_TOPLEVEL 2 /* 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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#endif /* Py_LIMITED_API */