mirror of
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d5b4f1b5a0
The symbol table was not exposing functionality to query the nonlocal symbols in a function or to check if a particular symbol is nonlocal.
114 lines
2.9 KiB
C
114 lines
2.9 KiB
C
#include "Python.h"
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#include "code.h"
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#include "Python-ast.h"
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#include "symtable.h"
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#include "clinic/symtablemodule.c.h"
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/*[clinic input]
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module _symtable
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[clinic start generated code]*/
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/*[clinic end generated code: output=da39a3ee5e6b4b0d input=f4685845a7100605]*/
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/*[clinic input]
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_symtable.symtable
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str: str
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filename: object(converter='PyUnicode_FSDecoder')
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startstr: str
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/
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Return symbol and scope dictionaries used internally by compiler.
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[clinic start generated code]*/
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static PyObject *
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_symtable_symtable_impl(PyObject *module, const char *str,
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PyObject *filename, const char *startstr)
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/*[clinic end generated code: output=914b369c9b785956 input=6c615e84d5f408e3]*/
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{
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struct symtable *st;
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PyObject *t;
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int start;
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if (strcmp(startstr, "exec") == 0)
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start = Py_file_input;
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else if (strcmp(startstr, "eval") == 0)
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start = Py_eval_input;
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else if (strcmp(startstr, "single") == 0)
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start = Py_single_input;
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else {
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PyErr_SetString(PyExc_ValueError,
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"symtable() arg 3 must be 'exec' or 'eval' or 'single'");
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Py_DECREF(filename);
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return NULL;
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}
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st = Py_SymtableStringObject(str, filename, start);
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Py_DECREF(filename);
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if (st == NULL)
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return NULL;
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t = (PyObject *)st->st_top;
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Py_INCREF(t);
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PyMem_Free((void *)st->st_future);
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PySymtable_Free(st);
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return t;
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}
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static PyMethodDef symtable_methods[] = {
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_SYMTABLE_SYMTABLE_METHODDEF
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{NULL, NULL} /* sentinel */
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};
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static struct PyModuleDef symtablemodule = {
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PyModuleDef_HEAD_INIT,
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"_symtable",
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NULL,
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-1,
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symtable_methods,
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NULL,
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NULL,
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NULL,
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NULL
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};
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PyMODINIT_FUNC
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PyInit__symtable(void)
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{
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PyObject *m;
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if (PyType_Ready(&PySTEntry_Type) < 0)
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return NULL;
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m = PyModule_Create(&symtablemodule);
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if (m == NULL)
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return NULL;
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PyModule_AddIntMacro(m, USE);
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PyModule_AddIntMacro(m, DEF_GLOBAL);
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PyModule_AddIntMacro(m, DEF_NONLOCAL);
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PyModule_AddIntMacro(m, DEF_LOCAL);
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PyModule_AddIntMacro(m, DEF_PARAM);
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PyModule_AddIntMacro(m, DEF_FREE);
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PyModule_AddIntMacro(m, DEF_FREE_CLASS);
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PyModule_AddIntMacro(m, DEF_IMPORT);
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PyModule_AddIntMacro(m, DEF_BOUND);
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PyModule_AddIntMacro(m, DEF_ANNOT);
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PyModule_AddIntConstant(m, "TYPE_FUNCTION", FunctionBlock);
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PyModule_AddIntConstant(m, "TYPE_CLASS", ClassBlock);
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PyModule_AddIntConstant(m, "TYPE_MODULE", ModuleBlock);
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PyModule_AddIntMacro(m, LOCAL);
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PyModule_AddIntMacro(m, GLOBAL_EXPLICIT);
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PyModule_AddIntMacro(m, GLOBAL_IMPLICIT);
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PyModule_AddIntMacro(m, FREE);
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PyModule_AddIntMacro(m, CELL);
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PyModule_AddIntConstant(m, "SCOPE_OFF", SCOPE_OFFSET);
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PyModule_AddIntMacro(m, SCOPE_MASK);
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if (PyErr_Occurred()) {
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Py_DECREF(m);
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m = 0;
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}
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return m;
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}
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