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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, // Used for annotations if 'from __future__ import annotations' is active. // Annotation blocks cannot bind names and are not evaluated. AnnotationBlock, // Used for generics and type aliases. These work mostly like functions // (see PEP 695 for details). The three different blocks function identically; // they are different enum entries only so that error messages can be more // precise. TypeVarBoundBlock, TypeAliasBlock, TypeParamBlock } _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; 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_needs_classdict : 1; /* for class scopes, true if a closure over the class dict should be created */ unsigned ste_comp_inlined : 1; /* true if this comprehension is inlined */ unsigned ste_comp_iter_target : 1; /* true if visiting comprehension target */ unsigned ste_can_see_class_scope : 1; /* true if this block can see names bound in an enclosing class scope */ 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; PyObject *ste_mangled_names; /* set of names for which mangling should be applied */ } PySTEntryObject; extern PyTypeObject PySTEntry_Type; #define PySTEntry_Check(op) Py_IS_TYPE((op), &PySTEntry_Type) extern long _PyST_GetSymbol(PySTEntryObject *, PyObject *); extern int _PyST_GetScope(PySTEntryObject *, PyObject *); extern int _PyST_IsFunctionLike(PySTEntryObject *); 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 *); extern PyObject *_Py_MaybeMangle(PyObject *privateobj, PySTEntryObject *ste, PyObject *name); extern PyObject* _Py_Mangle(PyObject *p, PyObject *name); /* 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_TYPE_PARAM (2<<9) /* this name is a type parameter */ #define DEF_COMP_CELL (2<<10) /* this name is a cell in an inlined comprehension */ #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 13-16. */ #define SCOPE_OFFSET 12 #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); int _PyFuture_FromAST( struct _mod * mod, PyObject *filename, PyFutureFeatures* futures); #ifdef __cplusplus } #endif #endif /* !Py_INTERNAL_SYMTABLE_H */
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