| #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 */ |