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Implement PEP 3115 -- new metaclass syntax and semantics.

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The compiler package hasn't been updated yet; test_compiler.py fails.
Otherwise all tests seem to be passing now.  There are no occurrences
of __metaclass__ left in the standard library.
Docs have not been updated.
This commit is contained in:
Guido van Rossum 2007-03-18 15:41:51 +00:00
parent ef17c16b36
commit 52cc1d838f
25 changed files with 604 additions and 237 deletions
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59
Python/ast.c
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@ -2092,28 +2092,6 @@ ast_for_testlist_gexp(struct compiling *c, const node* n)
return ast_for_testlist(c, n);
}
/* like ast_for_testlist() but returns a sequence */
static asdl_seq*
ast_for_class_bases(struct compiling *c, const node* n)
{
/* testlist: test (',' test)* [','] */
assert(NCH(n) > 0);
REQ(n, testlist);
if (NCH(n) == 1) {
expr_ty base;
asdl_seq *bases = asdl_seq_new(1, c->c_arena);
if (!bases)
return NULL;
base = ast_for_expr(c, CHILD(n, 0));
if (!base)
return NULL;
asdl_seq_SET(bases, 0, base);
return bases;
}
return seq_for_testlist(c, n);
}
static stmt_ty
ast_for_expr_stmt(struct compiling *c, const node *n)
{
@ -3032,9 +3010,10 @@ ast_for_with_stmt(struct compiling *c, const node *n)
static stmt_ty
ast_for_classdef(struct compiling *c, const node *n)
{
/* classdef: 'class' NAME ['(' testlist ')'] ':' suite */
asdl_seq *bases, *s;
/* classdef: 'class' NAME ['(' arglist ')'] ':' suite */
asdl_seq *s;
expr_ty call, dummy;
REQ(n, classdef);
if (!strcmp(STR(CHILD(n, 1)), "None")) {
@ -3042,32 +3021,36 @@ ast_for_classdef(struct compiling *c, const node *n)
return NULL;
}
if (NCH(n) == 4) {
if (NCH(n) == 4) { /* class NAME ':' suite */
s = ast_for_suite(c, CHILD(n, 3));
if (!s)
return NULL;
return ClassDef(NEW_IDENTIFIER(CHILD(n, 1)), NULL, s, LINENO(n),
n->n_col_offset, c->c_arena);
return ClassDef(NEW_IDENTIFIER(CHILD(n, 1)), NULL, NULL, NULL, NULL, s,
LINENO(n), n->n_col_offset, c->c_arena);
}
/* check for empty base list */
if (TYPE(CHILD(n,3)) == RPAR) {
if (TYPE(CHILD(n, 3)) == RPAR) { /* class NAME '(' ')' ':' suite */
s = ast_for_suite(c, CHILD(n,5));
if (!s)
return NULL;
return ClassDef(NEW_IDENTIFIER(CHILD(n, 1)), NULL, s, LINENO(n),
n->n_col_offset, c->c_arena);
return ClassDef(NEW_IDENTIFIER(CHILD(n, 1)), NULL, NULL, NULL, NULL, s,
LINENO(n), n->n_col_offset, c->c_arena);
}
/* else handle the base class list */
bases = ast_for_class_bases(c, CHILD(n, 3));
if (!bases)
/* class NAME '(' arglist ')' ':' suite */
/* build up a fake Call node so we can extract its pieces */
dummy = Name(NEW_IDENTIFIER(CHILD(n, 1)), Load, LINENO(n), n->n_col_offset, c->c_arena);
call = ast_for_call(c, CHILD(n, 3), dummy);
if (!call)
return NULL;
s = ast_for_suite(c, CHILD(n, 6));
if (!s)
return NULL;
return ClassDef(NEW_IDENTIFIER(CHILD(n, 1)), bases, s, LINENO(n),
n->n_col_offset, c->c_arena);
return ClassDef(NEW_IDENTIFIER(CHILD(n, 1)),
call->v.Call.args, call->v.Call.keywords,
call->v.Call.starargs, call->v.Call.kwargs, s,
LINENO(n), n->n_col_offset, c->c_arena);
}
static stmt_ty