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bpo-40334: PEP 617 implementation: New PEG parser for CPython (GH-19503)

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Co-authored-by: Guido van Rossum <guido@python.org>
Co-authored-by: Lysandros Nikolaou <lisandrosnik@gmail.com>
This commit is contained in:
Pablo Galindo 2020-04-22 23:29:27 +01:00 • committed by GitHub
parent a81849b031
commit c5fc156852
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GPG key ID: 4AEE18F83AFDEB23
91 changed files with 27057 additions and 146 deletions
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67
Python/compile.c
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@ -2152,6 +2152,55 @@ compiler_default_arguments(struct compiler *c, arguments_ty args)
return funcflags;
}
static int
forbidden_name(struct compiler *c, identifier name, expr_context_ty ctx)
{
if (ctx == Store && _PyUnicode_EqualToASCIIString(name, "__debug__")) {
compiler_error(c, "cannot assign to __debug__");
return 1;
}
return 0;
}
static int
compiler_check_debug_one_arg(struct compiler *c, arg_ty arg)
{
if (arg != NULL) {
if (forbidden_name(c, arg->arg, Store))
return 0;
}
return 1;
}
static int
compiler_check_debug_args_seq(struct compiler *c, asdl_seq *args)
{
if (args != NULL) {
for (int i = 0, n = asdl_seq_LEN(args); i < n; i++) {
if (!compiler_check_debug_one_arg(c, asdl_seq_GET(args, i)))
return 0;
}
}
return 1;
}
static int
compiler_check_debug_args(struct compiler *c, arguments_ty args)
{
if (!compiler_check_debug_args_seq(c, args->posonlyargs))
return 0;
if (!compiler_check_debug_args_seq(c, args->args))
return 0;
if (!compiler_check_debug_one_arg(c, args->vararg))
return 0;
if (!compiler_check_debug_args_seq(c, args->kwonlyargs))
return 0;
if (!compiler_check_debug_one_arg(c, args->kwarg))
return 0;
return 1;
}
static int
compiler_function(struct compiler *c, stmt_ty s, int is_async)
{
@ -2189,6 +2238,9 @@ compiler_function(struct compiler *c, stmt_ty s, int is_async)
scope_type = COMPILER_SCOPE_FUNCTION;
}
if (!compiler_check_debug_args(c, args))
return 0;
if (!compiler_decorators(c, decos))
return 0;
@ -2596,6 +2648,9 @@ compiler_lambda(struct compiler *c, expr_ty e)
arguments_ty args = e->v.Lambda.args;
assert(e->kind == Lambda_kind);
if (!compiler_check_debug_args(c, args))
return 0;
if (!name) {
name = PyUnicode_InternFromString("<lambda>");
if (!name)
@ -3505,6 +3560,9 @@ compiler_nameop(struct compiler *c, identifier name, expr_context_ty ctx)
!_PyUnicode_EqualToASCIIString(name, "True") &&
!_PyUnicode_EqualToASCIIString(name, "False"));
if (forbidden_name(c, name, ctx))
return 0;
mangled = _Py_Mangle(c->u->u_private, name);
if (!mangled)
return 0;
@ -4056,6 +4114,9 @@ validate_keywords(struct compiler *c, asdl_seq *keywords)
if (key->arg == NULL) {
continue;
}
if (forbidden_name(c, key->arg, Store)) {
return -1;
}
for (Py_ssize_t j = i + 1; j < nkeywords; j++) {
keyword_ty other = ((keyword_ty)asdl_seq_GET(keywords, j));
if (other->arg && !PyUnicode_Compare(key->arg, other->arg)) {
@ -5013,6 +5074,8 @@ compiler_visit_expr1(struct compiler *c, expr_ty e)
ADDOP_NAME(c, LOAD_ATTR, e->v.Attribute.attr, names);
break;
case Store:
if (forbidden_name(c, e->v.Attribute.attr, e->v.Attribute.ctx))
return 0;
ADDOP_NAME(c, STORE_ATTR, e->v.Attribute.attr, names);
break;
case Del:
@ -5183,6 +5246,8 @@ compiler_annassign(struct compiler *c, stmt_ty s)
}
switch (targ->kind) {
case Name_kind:
if (forbidden_name(c, targ->v.Name.id, Store))
return 0;
/* If we have a simple name in a module or class, store annotation. */
if (s->v.AnnAssign.simple &&
(c->u->u_scope_type == COMPILER_SCOPE_MODULE ||
@ -5200,6 +5265,8 @@ compiler_annassign(struct compiler *c, stmt_ty s)
}
break;
case Attribute_kind:
if (forbidden_name(c, targ->v.Attribute.attr, Store))
return 0;
if (!s->v.AnnAssign.value &&
!check_ann_expr(c, targ->v.Attribute.value)) {
return 0;