mirror of
https://github.com/python/cpython.git
synced 2024-12-12 03:04:15 +08:00
cb17ae8b19
of nested functions. Either is allowed in a function if it contains no defs or lambdas or the defs and lambdas it contains have no free variables. If a function is itself nested and has free variables, either is illegal. Revise the symtable to use a PySymtableEntryObject, which holds all the revelent information for a scope, rather than using a bunch of st_cur_XXX pointers in the symtable struct. The changes simplify the internal management of the current symtable scope and of the stack. Added new C source file: Python/symtable.c. (Does the Windows build process need to be updated?) As part of these changes, the initial _symtable module interface introduced in 2.1a2 is replaced. A dictionary of PySymtableEntryObjects are returned.
73 lines
2.1 KiB
C
73 lines
2.1 KiB
C
#include "Python.h"
|
|
|
|
#include "compile.h"
|
|
#include "symtable.h"
|
|
|
|
static PyObject *
|
|
symtable_symtable(PyObject *self, PyObject *args)
|
|
{
|
|
struct symtable *st;
|
|
PyObject *t;
|
|
|
|
char *str;
|
|
char *filename;
|
|
char *startstr;
|
|
int start;
|
|
|
|
if (!PyArg_ParseTuple(args, "sss:symtable", &str, &filename,
|
|
&startstr))
|
|
return NULL;
|
|
if (strcmp(startstr, "exec") == 0)
|
|
start = Py_file_input;
|
|
else if (strcmp(startstr, "eval") == 0)
|
|
start = Py_eval_input;
|
|
else if (strcmp(startstr, "single") == 0)
|
|
start = Py_single_input;
|
|
else {
|
|
PyErr_SetString(PyExc_ValueError,
|
|
"symtable() arg 3 must be 'exec' or 'eval' or 'single'");
|
|
return NULL;
|
|
}
|
|
st = Py_SymtableString(str, filename, start);
|
|
if (st == NULL)
|
|
return NULL;
|
|
t = Py_BuildValue("O", st->st_symbols);
|
|
PySymtable_Free(st);
|
|
return t;
|
|
}
|
|
|
|
static PyMethodDef symtable_methods[] = {
|
|
{"symtable", symtable_symtable, METH_VARARGS,
|
|
"Return symbol and scope dictionaries used internally by compiler."},
|
|
{NULL, NULL} /* sentinel */
|
|
};
|
|
|
|
DL_EXPORT(void)
|
|
init_symtable(void)
|
|
{
|
|
PyObject *m;
|
|
|
|
m = Py_InitModule("_symtable", symtable_methods);
|
|
PyModule_AddIntConstant(m, "USE", USE);
|
|
PyModule_AddIntConstant(m, "DEF_GLOBAL", DEF_GLOBAL);
|
|
PyModule_AddIntConstant(m, "DEF_LOCAL", DEF_LOCAL);
|
|
PyModule_AddIntConstant(m, "DEF_PARAM", DEF_PARAM);
|
|
PyModule_AddIntConstant(m, "DEF_STAR", DEF_STAR);
|
|
PyModule_AddIntConstant(m, "DEF_DOUBLESTAR", DEF_DOUBLESTAR);
|
|
PyModule_AddIntConstant(m, "DEF_INTUPLE", DEF_INTUPLE);
|
|
PyModule_AddIntConstant(m, "DEF_FREE", DEF_FREE);
|
|
PyModule_AddIntConstant(m, "DEF_FREE_GLOBAL", DEF_FREE_GLOBAL);
|
|
PyModule_AddIntConstant(m, "DEF_FREE_CLASS", DEF_FREE_CLASS);
|
|
PyModule_AddIntConstant(m, "DEF_IMPORT", DEF_IMPORT);
|
|
|
|
PyModule_AddIntConstant(m, "TYPE_FUNCTION", TYPE_FUNCTION);
|
|
PyModule_AddIntConstant(m, "TYPE_CLASS", TYPE_CLASS);
|
|
PyModule_AddIntConstant(m, "TYPE_MODULE", TYPE_MODULE);
|
|
|
|
PyModule_AddIntConstant(m, "LOCAL", LOCAL);
|
|
PyModule_AddIntConstant(m, "GLOBAL_EXPLICIT", GLOBAL_EXPLICIT);
|
|
PyModule_AddIntConstant(m, "GLOBAL_IMPLICIT", GLOBAL_IMPLICIT);
|
|
PyModule_AddIntConstant(m, "FREE", FREE);
|
|
PyModule_AddIntConstant(m, "CELL", CELL);
|
|
}
|