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Clean up from-import handling.

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This commit is contained in:
Thomas Wouters 2006-02-27 17:05:19 +00:00
parent b79afb6e3a
commit 106203c6e0
1 changed files with 21 additions and 22 deletions
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43
Python/ast.c
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@ -2170,44 +2170,43 @@ ast_for_import_stmt(struct compiling *c, const node *n)
}
else if (STR(CHILD(n, 0))[0] == 'f') { /* from */
int n_children;
const char *from_modules;
int lineno = LINENO(n);
alias_ty mod = alias_for_import_name(c, CHILD(n, 1));
if (!mod)
return NULL;
/* XXX this needs to be cleaned up */
from_modules = STR(CHILD(n, 3));
if (!from_modules) {
n = CHILD(n, 3); /* from ... import x, y, z */
if (NCH(n) % 2 == 0) {
/* it ends with a comma, not valid but the parser allows it */
switch (TYPE(CHILD(n, 3))) {
case STAR:
/* from ... import * */
n = CHILD(n, 3);
n_children = 1;
break;
case LPAR:
/* from ... import (x, y, z) */
n = CHILD(n, 4);
n_children = NCH(n);
break;
case import_as_names:
/* from ... import x, y, z */
n = CHILD(n, 3);
n_children = NCH(n);
if (n_children % 2 == 0) {
ast_error(n, "trailing comma not allowed without"
" surrounding parentheses");
return NULL;
}
}
else if (from_modules[0] == '*') {
n = CHILD(n, 3); /* from ... import * */
}
else if (from_modules[0] == '(')
n = CHILD(n, 4); /* from ... import (x, y, z) */
else {
/* XXX: don't we need to call ast_error(n, "..."); */
return NULL;
break;
default:
ast_error(n, "Unexpected node-type in from-import");
return NULL;
}
n_children = NCH(n);
if (from_modules && from_modules[0] == '*')
n_children = 1;
aliases = asdl_seq_new((n_children + 1) / 2, c->c_arena);
if (!aliases)
return NULL;
/* handle "from ... import *" special b/c there's no children */
if (from_modules && from_modules[0] == '*') {
if (TYPE(n) == STAR) {
alias_ty import_alias = alias_for_import_name(c, n);
if (!import_alias)
return NULL;