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Editing: symtable.h
#ifndef Py_LIMITED_API #ifndef Py_SYMTABLE_H #define Py_SYMTABLE_H #ifdef __cplusplus extern "C" { #endif #include "Python-ast.h" /* mod_ty */ /* 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_comprehension : 1; /* true if namespace is a list comprehension */ 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_opt_lineno; /* lineno of last exec or import * */ int ste_opt_col_offset; /* offset of last exec or import * */ struct symtable *ste_table; } PySTEntryObject; PyAPI_DATA(PyTypeObject) PySTEntry_Type; #define PySTEntry_Check(op) Py_IS_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_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 #ifdef __cplusplus } #endif #endif /* !Py_SYMTABLE_H */ #endif /* !Py_LIMITED_API */
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