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cpython/Include/symtable.h at 3.5 · python/cpython · GitHub
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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_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 */
int
ste_col_offset
;
/* offset of first line of block */
int
ste_opt_lineno
;
/* lineno of last exec or import * */
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 */
#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 */
#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
#define
GENERATOR
1
#define
GENERATOR_EXPRESSION
2
#ifdef
__cplusplus
}
#endif
#endif
/* !Py_SYMTABLE_H */
#endif
/* Py_LIMITED_API */
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