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#ifndef Py_INTERNAL_SYMTABLE_H
#define Py_INTERNAL_SYMTABLE_H
#ifdef __cplusplus
extern "C" {
#endif

#ifndef Py_BUILD_CORE
#  error "this header requires Py_BUILD_CORE define"
#endif

struct _mod;   // Type defined in pycore_ast.h

typedef enum _block_type { FunctionBlock, ClassBlock, ModuleBlock, AnnotationBlock }
    _Py_block_ty;

typedef enum _comprehension_type {
    NoComprehension = 0,
    ListComprehension = 1,
    DictComprehension = 2,
    SetComprehension = 3,
    GeneratorExpression = 4 } _Py_comprehension_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 */
    _Py_comprehension_ty ste_comprehension;  /* Kind of comprehension (if any) */
    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 */
    unsigned ste_comp_iter_target : 1; /* true if visiting comprehension target */
    int ste_comp_iter_expr; /* non-zero if visiting a comprehension range expression */
    int ste_lineno;          /* first line of block */
    int ste_col_offset;      /* offset of first line of block */
    int ste_end_lineno;      /* end line of block */
    int ste_end_col_offset;  /* end 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 * */
    struct symtable *ste_table;
} PySTEntryObject;

extern PyTypeObject PySTEntry_Type;

#define PySTEntry_Check(op) Py_IS_TYPE(op, &PySTEntry_Type)

extern int _PyST_GetScope(PySTEntryObject *, PyObject *);

extern struct symtable* _PySymtable_Build(
    struct _mod *mod,
    PyObject *filename,
    PyFutureFeatures *future);
PyAPI_FUNC(PySTEntryObject *) PySymtable_Lookup(struct symtable *, void *);

extern 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_COMP_ITER 2<<8     /* this name is a comprehension iteration variable */

#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

// Used by symtablemodule.c
extern struct symtable* _Py_SymtableStringObjectFlags(
    const char *str,
    PyObject *filename,
    int start,
    PyCompilerFlags *flags);

#ifdef __cplusplus
}
#endif
#endif /* !Py_INTERNAL_SYMTABLE_H */

	#ifndef Py_INTERNAL_SYMTABLE_H
	#define Py_INTERNAL_SYMTABLE_H
	#ifdef __cplusplus
	extern "C" {
	#endif

	#ifndef Py_BUILD_CORE
	# error "this header requires Py_BUILD_CORE define"
	#endif

	struct _mod; // Type defined in pycore_ast.h

	typedef enum _block_type { FunctionBlock, ClassBlock, ModuleBlock, AnnotationBlock }
	_Py_block_ty;

	typedef enum _comprehension_type {
	NoComprehension = 0,
	ListComprehension = 1,
	DictComprehension = 2,
	SetComprehension = 3,
	GeneratorExpression = 4 } _Py_comprehension_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 */
	_Py_comprehension_ty ste_comprehension; /* Kind of comprehension (if any) */
	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 */
	unsigned ste_comp_iter_target : 1; /* true if visiting comprehension target */
	int ste_comp_iter_expr; /* non-zero if visiting a comprehension range expression */
	int ste_lineno; /* first line of block */
	int ste_col_offset; /* offset of first line of block */
	int ste_end_lineno; /* end line of block */
	int ste_end_col_offset; /* end 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 * */
	struct symtable *ste_table;
	} PySTEntryObject;

	extern PyTypeObject PySTEntry_Type;

	#define PySTEntry_Check(op) Py_IS_TYPE(op, &PySTEntry_Type)

	extern int _PyST_GetScope(PySTEntryObject , PyObject );

	extern struct symtable* _PySymtable_Build(
	struct _mod *mod,
	PyObject *filename,
	PyFutureFeatures *future);
	PyAPI_FUNC(PySTEntryObject ) PySymtable_Lookup(struct symtable , void *);

	extern 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_COMP_ITER 2<<8 /* this name is a comprehension iteration variable */

	#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

	// Used by symtablemodule.c
	extern struct symtable* _Py_SymtableStringObjectFlags(
	const char *str,
	PyObject *filename,
	int start,
	PyCompilerFlags *flags);

	#ifdef __cplusplus
	}
	#endif
	#endif /* !Py_INTERNAL_SYMTABLE_H */