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Edit File : symtable.h \| Size : 4.88 KB
#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_coroutine : 1; / true if namespace is a coroutine / 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_ANNOT 2<<7 / this name is annotated / #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 */ Back

Edit File : symtable.h | Size : 4.88 KB

#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_coroutine : 1;   /* true if namespace is a coroutine */
    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_ANNOT 2<<7         /* this name is annotated */

#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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