Mercurial > cpython-lru_cache-weakref

annotate Python/future.c @ 18333:41243cb4ea05 legacy-trunk

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
Another "if 0:" hack, this time to complain about otherwise invisible "return expr" instances in generators (which latter may be generators due to otherwise invisible "yield" stmts hiding in "if 0" blocks). This was fun the first time, but this has gotten truly ugly now.
author Tim Peters <tim.peters@gmail.com>
date Thu, 28 Jun 2001 01:52:22 +0000
parents 7a36f6201c94
children 59446d0f8341
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
16799
08d937107fe6 Improved __future__ parser; still more to do
Jeremy Hylton <jeremy@alum.mit.edu>
parents:
diff changeset
1 #include "Python.h"
08d937107fe6 Improved __future__ parser; still more to do
Jeremy Hylton <jeremy@alum.mit.edu>
parents:
diff changeset
2 #include "node.h"
08d937107fe6 Improved __future__ parser; still more to do
Jeremy Hylton <jeremy@alum.mit.edu>
parents:
diff changeset
3 #include "token.h"
08d937107fe6 Improved __future__ parser; still more to do
Jeremy Hylton <jeremy@alum.mit.edu>
parents:
diff changeset
4 #include "graminit.h"
08d937107fe6 Improved __future__ parser; still more to do
Jeremy Hylton <jeremy@alum.mit.edu>
parents:
diff changeset
5 #include "compile.h"
08d937107fe6 Improved __future__ parser; still more to do
Jeremy Hylton <jeremy@alum.mit.edu>
parents:
diff changeset
6 #include "symtable.h"
08d937107fe6 Improved __future__ parser; still more to do
Jeremy Hylton <jeremy@alum.mit.edu>
parents:
diff changeset
7
08d937107fe6 Improved __future__ parser; still more to do
Jeremy Hylton <jeremy@alum.mit.edu>
parents:
diff changeset
8 #define UNDEFINED_FUTURE_FEATURE "future feature %.100s is not defined"
16838
09f6c1372056 Improve SyntaxErrors for bad future statements. Set file and location
Jeremy Hylton <jeremy@alum.mit.edu>
parents: 16824
diff changeset
9 #define FUTURE_IMPORT_STAR "future statement does not support import *"
16799
08d937107fe6 Improved __future__ parser; still more to do
Jeremy Hylton <jeremy@alum.mit.edu>
parents:
diff changeset
10
16823
acbe74f3a786 Presumed correct compiler pass for future statements
Jeremy Hylton <jeremy@alum.mit.edu>
parents: 16799
diff changeset
11 #define FUTURE_POSSIBLE(FF) ((FF)->ff_last_lineno == -1)
acbe74f3a786 Presumed correct compiler pass for future statements
Jeremy Hylton <jeremy@alum.mit.edu>
parents: 16799
diff changeset
12
16799
08d937107fe6 Improved __future__ parser; still more to do
Jeremy Hylton <jeremy@alum.mit.edu>
parents:
diff changeset
13 static int
16838
09f6c1372056 Improve SyntaxErrors for bad future statements. Set file and location
Jeremy Hylton <jeremy@alum.mit.edu>
parents: 16824
diff changeset
14 future_check_features(PyFutureFeatures *ff, node *n, char *filename)
16799
08d937107fe6 Improved __future__ parser; still more to do
Jeremy Hylton <jeremy@alum.mit.edu>
parents:
diff changeset
15 {
08d937107fe6 Improved __future__ parser; still more to do
Jeremy Hylton <jeremy@alum.mit.edu>
parents:
diff changeset
16 int i;
08d937107fe6 Improved __future__ parser; still more to do
Jeremy Hylton <jeremy@alum.mit.edu>
parents:
diff changeset
17 char *feature;
16838
09f6c1372056 Improve SyntaxErrors for bad future statements. Set file and location
Jeremy Hylton <jeremy@alum.mit.edu>
parents: 16824
diff changeset
18 node *ch;
16799
08d937107fe6 Improved __future__ parser; still more to do
Jeremy Hylton <jeremy@alum.mit.edu>
parents:
diff changeset
19
08d937107fe6 Improved __future__ parser; still more to do
Jeremy Hylton <jeremy@alum.mit.edu>
parents:
diff changeset
20 REQ(n, import_stmt); /* must by from __future__ import ... */
08d937107fe6 Improved __future__ parser; still more to do
Jeremy Hylton <jeremy@alum.mit.edu>
parents:
diff changeset
21
17018
7a36f6201c94 When iterating over the names imported in a future statement, ignore the
Fred Drake <fdrake@acm.org>
parents: 16838
diff changeset
22 for (i = 3; i < NCH(n); i += 2) {
16838
09f6c1372056 Improve SyntaxErrors for bad future statements. Set file and location
Jeremy Hylton <jeremy@alum.mit.edu>
parents: 16824
diff changeset
23 ch = CHILD(n, i);
09f6c1372056 Improve SyntaxErrors for bad future statements. Set file and location
Jeremy Hylton <jeremy@alum.mit.edu>
parents: 16824
diff changeset
24 if (TYPE(ch) == STAR) {
09f6c1372056 Improve SyntaxErrors for bad future statements. Set file and location
Jeremy Hylton <jeremy@alum.mit.edu>
parents: 16824
diff changeset
25 PyErr_SetString(PyExc_SyntaxError,
09f6c1372056 Improve SyntaxErrors for bad future statements. Set file and location
Jeremy Hylton <jeremy@alum.mit.edu>
parents: 16824
diff changeset
26 FUTURE_IMPORT_STAR);
09f6c1372056 Improve SyntaxErrors for bad future statements. Set file and location
Jeremy Hylton <jeremy@alum.mit.edu>
parents: 16824
diff changeset
27 PyErr_SyntaxLocation(filename, ch->n_lineno);
09f6c1372056 Improve SyntaxErrors for bad future statements. Set file and location
Jeremy Hylton <jeremy@alum.mit.edu>
parents: 16824
diff changeset
28 return -1;
09f6c1372056 Improve SyntaxErrors for bad future statements. Set file and location
Jeremy Hylton <jeremy@alum.mit.edu>
parents: 16824
diff changeset
29 }
09f6c1372056 Improve SyntaxErrors for bad future statements. Set file and location
Jeremy Hylton <jeremy@alum.mit.edu>
parents: 16824
diff changeset
30 REQ(ch, import_as_name);
09f6c1372056 Improve SyntaxErrors for bad future statements. Set file and location
Jeremy Hylton <jeremy@alum.mit.edu>
parents: 16824
diff changeset
31 feature = STR(CHILD(ch, 0));
16799
08d937107fe6 Improved __future__ parser; still more to do
Jeremy Hylton <jeremy@alum.mit.edu>
parents:
diff changeset
32 if (strcmp(feature, FUTURE_NESTED_SCOPES) == 0) {
08d937107fe6 Improved __future__ parser; still more to do
Jeremy Hylton <jeremy@alum.mit.edu>
parents:
diff changeset
33 ff->ff_nested_scopes = 1;
16838
09f6c1372056 Improve SyntaxErrors for bad future statements. Set file and location
Jeremy Hylton <jeremy@alum.mit.edu>
parents: 16824
diff changeset
34 } else if (strcmp(feature, "braces") == 0) {
09f6c1372056 Improve SyntaxErrors for bad future statements. Set file and location
Jeremy Hylton <jeremy@alum.mit.edu>
parents: 16824
diff changeset
35 PyErr_SetString(PyExc_SyntaxError,
09f6c1372056 Improve SyntaxErrors for bad future statements. Set file and location
Jeremy Hylton <jeremy@alum.mit.edu>
parents: 16824
diff changeset
36 "not a chance");
09f6c1372056 Improve SyntaxErrors for bad future statements. Set file and location
Jeremy Hylton <jeremy@alum.mit.edu>
parents: 16824
diff changeset
37 PyErr_SyntaxLocation(filename, CHILD(ch, 0)->n_lineno);
09f6c1372056 Improve SyntaxErrors for bad future statements. Set file and location
Jeremy Hylton <jeremy@alum.mit.edu>
parents: 16824
diff changeset
38 return -1;
16799
08d937107fe6 Improved __future__ parser; still more to do
Jeremy Hylton <jeremy@alum.mit.edu>
parents:
diff changeset
39 } else {
08d937107fe6 Improved __future__ parser; still more to do
Jeremy Hylton <jeremy@alum.mit.edu>
parents:
diff changeset
40 PyErr_Format(PyExc_SyntaxError,
08d937107fe6 Improved __future__ parser; still more to do
Jeremy Hylton <jeremy@alum.mit.edu>
parents:
diff changeset
41 UNDEFINED_FUTURE_FEATURE, feature);
16838
09f6c1372056 Improve SyntaxErrors for bad future statements. Set file and location
Jeremy Hylton <jeremy@alum.mit.edu>
parents: 16824
diff changeset
42 PyErr_SyntaxLocation(filename, CHILD(ch, 0)->n_lineno);
16799
08d937107fe6 Improved __future__ parser; still more to do
Jeremy Hylton <jeremy@alum.mit.edu>
parents:
diff changeset
43 return -1;
08d937107fe6 Improved __future__ parser; still more to do
Jeremy Hylton <jeremy@alum.mit.edu>
parents:
diff changeset
44 }
08d937107fe6 Improved __future__ parser; still more to do
Jeremy Hylton <jeremy@alum.mit.edu>
parents:
diff changeset
45 }
08d937107fe6 Improved __future__ parser; still more to do
Jeremy Hylton <jeremy@alum.mit.edu>
parents:
diff changeset
46 return 0;
08d937107fe6 Improved __future__ parser; still more to do
Jeremy Hylton <jeremy@alum.mit.edu>
parents:
diff changeset
47 }
08d937107fe6 Improved __future__ parser; still more to do
Jeremy Hylton <jeremy@alum.mit.edu>
parents:
diff changeset
48
16823
acbe74f3a786 Presumed correct compiler pass for future statements
Jeremy Hylton <jeremy@alum.mit.edu>
parents: 16799
diff changeset
49 static void
acbe74f3a786 Presumed correct compiler pass for future statements
Jeremy Hylton <jeremy@alum.mit.edu>
parents: 16799
diff changeset
50 future_error(node *n, char *filename)
acbe74f3a786 Presumed correct compiler pass for future statements
Jeremy Hylton <jeremy@alum.mit.edu>
parents: 16799
diff changeset
51 {
acbe74f3a786 Presumed correct compiler pass for future statements
Jeremy Hylton <jeremy@alum.mit.edu>
parents: 16799
diff changeset
52 PyErr_SetString(PyExc_SyntaxError,
acbe74f3a786 Presumed correct compiler pass for future statements
Jeremy Hylton <jeremy@alum.mit.edu>
parents: 16799
diff changeset
53 "from __future__ imports must occur at the "
acbe74f3a786 Presumed correct compiler pass for future statements
Jeremy Hylton <jeremy@alum.mit.edu>
parents: 16799
diff changeset
54 "beginning of the file");
16838
09f6c1372056 Improve SyntaxErrors for bad future statements. Set file and location
Jeremy Hylton <jeremy@alum.mit.edu>
parents: 16824
diff changeset
55 PyErr_SyntaxLocation(filename, n->n_lineno);
16823
acbe74f3a786 Presumed correct compiler pass for future statements
Jeremy Hylton <jeremy@alum.mit.edu>
parents: 16799
diff changeset
56 /* XXX set filename and lineno */
acbe74f3a786 Presumed correct compiler pass for future statements
Jeremy Hylton <jeremy@alum.mit.edu>
parents: 16799
diff changeset
57 }
acbe74f3a786 Presumed correct compiler pass for future statements
Jeremy Hylton <jeremy@alum.mit.edu>
parents: 16799
diff changeset
58
16799
08d937107fe6 Improved __future__ parser; still more to do
Jeremy Hylton <jeremy@alum.mit.edu>
parents:
diff changeset
59 /* Relevant portions of the grammar:
08d937107fe6 Improved __future__ parser; still more to do
Jeremy Hylton <jeremy@alum.mit.edu>
parents:
diff changeset
60
08d937107fe6 Improved __future__ parser; still more to do
Jeremy Hylton <jeremy@alum.mit.edu>
parents:
diff changeset
61 single_input: NEWLINE | simple_stmt | compound_stmt NEWLINE
08d937107fe6 Improved __future__ parser; still more to do
Jeremy Hylton <jeremy@alum.mit.edu>
parents:
diff changeset
62 file_input: (NEWLINE | stmt)* ENDMARKER
08d937107fe6 Improved __future__ parser; still more to do
Jeremy Hylton <jeremy@alum.mit.edu>
parents:
diff changeset
63 stmt: simple_stmt | compound_stmt
08d937107fe6 Improved __future__ parser; still more to do
Jeremy Hylton <jeremy@alum.mit.edu>
parents:
diff changeset
64 simple_stmt: small_stmt (';' small_stmt)* [';'] NEWLINE
16838
09f6c1372056 Improve SyntaxErrors for bad future statements. Set file and location
Jeremy Hylton <jeremy@alum.mit.edu>
parents: 16824
diff changeset
65 small_stmt: expr_stmt | print_stmt | del_stmt | pass_stmt | flow_stmt
09f6c1372056 Improve SyntaxErrors for bad future statements. Set file and location
Jeremy Hylton <jeremy@alum.mit.edu>
parents: 16824
diff changeset
66 | import_stmt | global_stmt | exec_stmt | assert_stmt
09f6c1372056 Improve SyntaxErrors for bad future statements. Set file and location
Jeremy Hylton <jeremy@alum.mit.edu>
parents: 16824
diff changeset
67 import_stmt: 'import' dotted_as_name (',' dotted_as_name)*
09f6c1372056 Improve SyntaxErrors for bad future statements. Set file and location
Jeremy Hylton <jeremy@alum.mit.edu>
parents: 16824
diff changeset
68 | 'from' dotted_name 'import' ('*' | import_as_name (',' import_as_name)*)
16799
08d937107fe6 Improved __future__ parser; still more to do
Jeremy Hylton <jeremy@alum.mit.edu>
parents:
diff changeset
69 import_as_name: NAME [NAME NAME]
08d937107fe6 Improved __future__ parser; still more to do
Jeremy Hylton <jeremy@alum.mit.edu>
parents:
diff changeset
70 dotted_as_name: dotted_name [NAME NAME]
08d937107fe6 Improved __future__ parser; still more to do
Jeremy Hylton <jeremy@alum.mit.edu>
parents:
diff changeset
71 dotted_name: NAME ('.' NAME)*
08d937107fe6 Improved __future__ parser; still more to do
Jeremy Hylton <jeremy@alum.mit.edu>
parents:
diff changeset
72 */
08d937107fe6 Improved __future__ parser; still more to do
Jeremy Hylton <jeremy@alum.mit.edu>
parents:
diff changeset
73
08d937107fe6 Improved __future__ parser; still more to do
Jeremy Hylton <jeremy@alum.mit.edu>
parents:
diff changeset
74 /* future_parse() return values:
08d937107fe6 Improved __future__ parser; still more to do
Jeremy Hylton <jeremy@alum.mit.edu>
parents:
diff changeset
75 -1 indicates an error occurred, e.g. unknown feature name
08d937107fe6 Improved __future__ parser; still more to do
Jeremy Hylton <jeremy@alum.mit.edu>
parents:
diff changeset
76 0 indicates no feature was found
08d937107fe6 Improved __future__ parser; still more to do
Jeremy Hylton <jeremy@alum.mit.edu>
parents:
diff changeset
77 1 indicates a feature was found
08d937107fe6 Improved __future__ parser; still more to do
Jeremy Hylton <jeremy@alum.mit.edu>
parents:
diff changeset
78 */
08d937107fe6 Improved __future__ parser; still more to do
Jeremy Hylton <jeremy@alum.mit.edu>
parents:
diff changeset
79
08d937107fe6 Improved __future__ parser; still more to do
Jeremy Hylton <jeremy@alum.mit.edu>
parents:
diff changeset
80 static int
16823
acbe74f3a786 Presumed correct compiler pass for future statements
Jeremy Hylton <jeremy@alum.mit.edu>
parents: 16799
diff changeset
81 future_parse(PyFutureFeatures *ff, node *n, char *filename)
16799
08d937107fe6 Improved __future__ parser; still more to do
Jeremy Hylton <jeremy@alum.mit.edu>
parents:
diff changeset
82 {
16823
acbe74f3a786 Presumed correct compiler pass for future statements
Jeremy Hylton <jeremy@alum.mit.edu>
parents: 16799
diff changeset
83 int i, r;
16799
08d937107fe6 Improved __future__ parser; still more to do
Jeremy Hylton <jeremy@alum.mit.edu>
parents:
diff changeset
84 loop:
08d937107fe6 Improved __future__ parser; still more to do
Jeremy Hylton <jeremy@alum.mit.edu>
parents:
diff changeset
85
08d937107fe6 Improved __future__ parser; still more to do
Jeremy Hylton <jeremy@alum.mit.edu>
parents:
diff changeset
86 switch (TYPE(n)) {
08d937107fe6 Improved __future__ parser; still more to do
Jeremy Hylton <jeremy@alum.mit.edu>
parents:
diff changeset
87
16824
d4a315e4094c Need to support single_input explicitly so from __future__ imports
Jeremy Hylton <jeremy@alum.mit.edu>
parents: 16823
diff changeset
88 case single_input:
d4a315e4094c Need to support single_input explicitly so from __future__ imports
Jeremy Hylton <jeremy@alum.mit.edu>
parents: 16823
diff changeset
89 if (TYPE(CHILD(n, 0)) == simple_stmt) {
d4a315e4094c Need to support single_input explicitly so from __future__ imports
Jeremy Hylton <jeremy@alum.mit.edu>
parents: 16823
diff changeset
90 n = CHILD(n, 0);
d4a315e4094c Need to support single_input explicitly so from __future__ imports
Jeremy Hylton <jeremy@alum.mit.edu>
parents: 16823
diff changeset
91 goto loop;
d4a315e4094c Need to support single_input explicitly so from __future__ imports
Jeremy Hylton <jeremy@alum.mit.edu>
parents: 16823
diff changeset
92 }
d4a315e4094c Need to support single_input explicitly so from __future__ imports
Jeremy Hylton <jeremy@alum.mit.edu>
parents: 16823
diff changeset
93 return 0;
d4a315e4094c Need to support single_input explicitly so from __future__ imports
Jeremy Hylton <jeremy@alum.mit.edu>
parents: 16823
diff changeset
94
16799
08d937107fe6 Improved __future__ parser; still more to do
Jeremy Hylton <jeremy@alum.mit.edu>
parents:
diff changeset
95 case file_input:
08d937107fe6 Improved __future__ parser; still more to do
Jeremy Hylton <jeremy@alum.mit.edu>
parents:
diff changeset
96 for (i = 0; i < NCH(n); i++) {
08d937107fe6 Improved __future__ parser; still more to do
Jeremy Hylton <jeremy@alum.mit.edu>
parents:
diff changeset
97 node *ch = CHILD(n, i);
08d937107fe6 Improved __future__ parser; still more to do
Jeremy Hylton <jeremy@alum.mit.edu>
parents:
diff changeset
98 if (TYPE(ch) == stmt) {
16823
acbe74f3a786 Presumed correct compiler pass for future statements
Jeremy Hylton <jeremy@alum.mit.edu>
parents: 16799
diff changeset
99 r = future_parse(ff, ch, filename);
acbe74f3a786 Presumed correct compiler pass for future statements
Jeremy Hylton <jeremy@alum.mit.edu>
parents: 16799
diff changeset
100 if (!FUTURE_POSSIBLE(ff))
acbe74f3a786 Presumed correct compiler pass for future statements
Jeremy Hylton <jeremy@alum.mit.edu>
parents: 16799
diff changeset
101 return r;
16799
08d937107fe6 Improved __future__ parser; still more to do
Jeremy Hylton <jeremy@alum.mit.edu>
parents:
diff changeset
102 }
08d937107fe6 Improved __future__ parser; still more to do
Jeremy Hylton <jeremy@alum.mit.edu>
parents:
diff changeset
103 }
08d937107fe6 Improved __future__ parser; still more to do
Jeremy Hylton <jeremy@alum.mit.edu>
parents:
diff changeset
104 return 0;
08d937107fe6 Improved __future__ parser; still more to do
Jeremy Hylton <jeremy@alum.mit.edu>
parents:
diff changeset
105
08d937107fe6 Improved __future__ parser; still more to do
Jeremy Hylton <jeremy@alum.mit.edu>
parents:
diff changeset
106 case simple_stmt:
16823
acbe74f3a786 Presumed correct compiler pass for future statements
Jeremy Hylton <jeremy@alum.mit.edu>
parents: 16799
diff changeset
107 if (NCH(n) == 2) {
16799
08d937107fe6 Improved __future__ parser; still more to do
Jeremy Hylton <jeremy@alum.mit.edu>
parents:
diff changeset
108 REQ(CHILD(n, 0), small_stmt);
08d937107fe6 Improved __future__ parser; still more to do
Jeremy Hylton <jeremy@alum.mit.edu>
parents:
diff changeset
109 n = CHILD(n, 0);
08d937107fe6 Improved __future__ parser; still more to do
Jeremy Hylton <jeremy@alum.mit.edu>
parents:
diff changeset
110 goto loop;
16823
acbe74f3a786 Presumed correct compiler pass for future statements
Jeremy Hylton <jeremy@alum.mit.edu>
parents: 16799
diff changeset
111 } else {
acbe74f3a786 Presumed correct compiler pass for future statements
Jeremy Hylton <jeremy@alum.mit.edu>
parents: 16799
diff changeset
112 /* Deal with the special case of a series of
acbe74f3a786 Presumed correct compiler pass for future statements
Jeremy Hylton <jeremy@alum.mit.edu>
parents: 16799
diff changeset
113 small statements on a single line. If a
acbe74f3a786 Presumed correct compiler pass for future statements
Jeremy Hylton <jeremy@alum.mit.edu>
parents: 16799
diff changeset
114 future statement follows some other
acbe74f3a786 Presumed correct compiler pass for future statements
Jeremy Hylton <jeremy@alum.mit.edu>
parents: 16799
diff changeset
115 statement, the SyntaxError is raised here.
acbe74f3a786 Presumed correct compiler pass for future statements
Jeremy Hylton <jeremy@alum.mit.edu>
parents: 16799
diff changeset
116 In all other cases, the symtable pass
acbe74f3a786 Presumed correct compiler pass for future statements
Jeremy Hylton <jeremy@alum.mit.edu>
parents: 16799
diff changeset
117 raises the exception.
acbe74f3a786 Presumed correct compiler pass for future statements
Jeremy Hylton <jeremy@alum.mit.edu>
parents: 16799
diff changeset
118 */
acbe74f3a786 Presumed correct compiler pass for future statements
Jeremy Hylton <jeremy@alum.mit.edu>
parents: 16799
diff changeset
119 int found = 0, end_of_future = 0;
acbe74f3a786 Presumed correct compiler pass for future statements
Jeremy Hylton <jeremy@alum.mit.edu>
parents: 16799
diff changeset
120
acbe74f3a786 Presumed correct compiler pass for future statements
Jeremy Hylton <jeremy@alum.mit.edu>
parents: 16799
diff changeset
121 for (i = 0; i < NCH(n); i += 2) {
acbe74f3a786 Presumed correct compiler pass for future statements
Jeremy Hylton <jeremy@alum.mit.edu>
parents: 16799
diff changeset
122 if (TYPE(CHILD(n, i)) == small_stmt) {
acbe74f3a786 Presumed correct compiler pass for future statements
Jeremy Hylton <jeremy@alum.mit.edu>
parents: 16799
diff changeset
123 r = future_parse(ff, CHILD(n, i),
acbe74f3a786 Presumed correct compiler pass for future statements
Jeremy Hylton <jeremy@alum.mit.edu>
parents: 16799
diff changeset
124 filename);
acbe74f3a786 Presumed correct compiler pass for future statements
Jeremy Hylton <jeremy@alum.mit.edu>
parents: 16799
diff changeset
125 if (r < 1)
acbe74f3a786 Presumed correct compiler pass for future statements
Jeremy Hylton <jeremy@alum.mit.edu>
parents: 16799
diff changeset
126 end_of_future = 1;
acbe74f3a786 Presumed correct compiler pass for future statements
Jeremy Hylton <jeremy@alum.mit.edu>
parents: 16799
diff changeset
127 else {
acbe74f3a786 Presumed correct compiler pass for future statements
Jeremy Hylton <jeremy@alum.mit.edu>
parents: 16799
diff changeset
128 found = 1;
acbe74f3a786 Presumed correct compiler pass for future statements
Jeremy Hylton <jeremy@alum.mit.edu>
parents: 16799
diff changeset
129 if (end_of_future) {
acbe74f3a786 Presumed correct compiler pass for future statements
Jeremy Hylton <jeremy@alum.mit.edu>
parents: 16799
diff changeset
130 future_error(n,
acbe74f3a786 Presumed correct compiler pass for future statements
Jeremy Hylton <jeremy@alum.mit.edu>
parents: 16799
diff changeset
131 filename);
acbe74f3a786 Presumed correct compiler pass for future statements
Jeremy Hylton <jeremy@alum.mit.edu>
parents: 16799
diff changeset
132 return -1;
acbe74f3a786 Presumed correct compiler pass for future statements
Jeremy Hylton <jeremy@alum.mit.edu>
parents: 16799
diff changeset
133 }
acbe74f3a786 Presumed correct compiler pass for future statements
Jeremy Hylton <jeremy@alum.mit.edu>
parents: 16799
diff changeset
134 }
acbe74f3a786 Presumed correct compiler pass for future statements
Jeremy Hylton <jeremy@alum.mit.edu>
parents: 16799
diff changeset
135 }
acbe74f3a786 Presumed correct compiler pass for future statements
Jeremy Hylton <jeremy@alum.mit.edu>
parents: 16799
diff changeset
136 }
acbe74f3a786 Presumed correct compiler pass for future statements
Jeremy Hylton <jeremy@alum.mit.edu>
parents: 16799
diff changeset
137
acbe74f3a786 Presumed correct compiler pass for future statements
Jeremy Hylton <jeremy@alum.mit.edu>
parents: 16799
diff changeset
138 /* If we found one and only one, then the
acbe74f3a786 Presumed correct compiler pass for future statements
Jeremy Hylton <jeremy@alum.mit.edu>
parents: 16799
diff changeset
139 current lineno is legal.
acbe74f3a786 Presumed correct compiler pass for future statements
Jeremy Hylton <jeremy@alum.mit.edu>
parents: 16799
diff changeset
140 */
acbe74f3a786 Presumed correct compiler pass for future statements
Jeremy Hylton <jeremy@alum.mit.edu>
parents: 16799
diff changeset
141 if (found)
acbe74f3a786 Presumed correct compiler pass for future statements
Jeremy Hylton <jeremy@alum.mit.edu>
parents: 16799
diff changeset
142 ff->ff_last_lineno = n->n_lineno + 1;
acbe74f3a786 Presumed correct compiler pass for future statements
Jeremy Hylton <jeremy@alum.mit.edu>
parents: 16799
diff changeset
143 else
acbe74f3a786 Presumed correct compiler pass for future statements
Jeremy Hylton <jeremy@alum.mit.edu>
parents: 16799
diff changeset
144 ff->ff_last_lineno = n->n_lineno;
acbe74f3a786 Presumed correct compiler pass for future statements
Jeremy Hylton <jeremy@alum.mit.edu>
parents: 16799
diff changeset
145
acbe74f3a786 Presumed correct compiler pass for future statements
Jeremy Hylton <jeremy@alum.mit.edu>
parents: 16799
diff changeset
146 if (end_of_future && found)
acbe74f3a786 Presumed correct compiler pass for future statements
Jeremy Hylton <jeremy@alum.mit.edu>
parents: 16799
diff changeset
147 return 1;
acbe74f3a786 Presumed correct compiler pass for future statements
Jeremy Hylton <jeremy@alum.mit.edu>
parents: 16799
diff changeset
148 else
acbe74f3a786 Presumed correct compiler pass for future statements
Jeremy Hylton <jeremy@alum.mit.edu>
parents: 16799
diff changeset
149 return 0;
16799
08d937107fe6 Improved __future__ parser; still more to do
Jeremy Hylton <jeremy@alum.mit.edu>
parents:
diff changeset
150 }
08d937107fe6 Improved __future__ parser; still more to do
Jeremy Hylton <jeremy@alum.mit.edu>
parents:
diff changeset
151
08d937107fe6 Improved __future__ parser; still more to do
Jeremy Hylton <jeremy@alum.mit.edu>
parents:
diff changeset
152 case stmt:
08d937107fe6 Improved __future__ parser; still more to do
Jeremy Hylton <jeremy@alum.mit.edu>
parents:
diff changeset
153 if (TYPE(CHILD(n, 0)) == simple_stmt) {
08d937107fe6 Improved __future__ parser; still more to do
Jeremy Hylton <jeremy@alum.mit.edu>
parents:
diff changeset
154 n = CHILD(n, 0);
08d937107fe6 Improved __future__ parser; still more to do
Jeremy Hylton <jeremy@alum.mit.edu>
parents:
diff changeset
155 goto loop;
16823
acbe74f3a786 Presumed correct compiler pass for future statements
Jeremy Hylton <jeremy@alum.mit.edu>
parents: 16799
diff changeset
156 } else if (TYPE(CHILD(n, 0)) == expr_stmt) {
acbe74f3a786 Presumed correct compiler pass for future statements
Jeremy Hylton <jeremy@alum.mit.edu>
parents: 16799
diff changeset
157 n = CHILD(n, 0);
acbe74f3a786 Presumed correct compiler pass for future statements
Jeremy Hylton <jeremy@alum.mit.edu>
parents: 16799
diff changeset
158 goto loop;
16799
08d937107fe6 Improved __future__ parser; still more to do
Jeremy Hylton <jeremy@alum.mit.edu>
parents:
diff changeset
159 } else {
08d937107fe6 Improved __future__ parser; still more to do
Jeremy Hylton <jeremy@alum.mit.edu>
parents:
diff changeset
160 REQ(CHILD(n, 0), compound_stmt);
08d937107fe6 Improved __future__ parser; still more to do
Jeremy Hylton <jeremy@alum.mit.edu>
parents:
diff changeset
161 ff->ff_last_lineno = n->n_lineno;
08d937107fe6 Improved __future__ parser; still more to do
Jeremy Hylton <jeremy@alum.mit.edu>
parents:
diff changeset
162 return 0;
08d937107fe6 Improved __future__ parser; still more to do
Jeremy Hylton <jeremy@alum.mit.edu>
parents:
diff changeset
163 }
08d937107fe6 Improved __future__ parser; still more to do
Jeremy Hylton <jeremy@alum.mit.edu>
parents:
diff changeset
164
08d937107fe6 Improved __future__ parser; still more to do
Jeremy Hylton <jeremy@alum.mit.edu>
parents:
diff changeset
165 case small_stmt:
08d937107fe6 Improved __future__ parser; still more to do
Jeremy Hylton <jeremy@alum.mit.edu>
parents:
diff changeset
166 n = CHILD(n, 0);
08d937107fe6 Improved __future__ parser; still more to do
Jeremy Hylton <jeremy@alum.mit.edu>
parents:
diff changeset
167 goto loop;
08d937107fe6 Improved __future__ parser; still more to do
Jeremy Hylton <jeremy@alum.mit.edu>
parents:
diff changeset
168
08d937107fe6 Improved __future__ parser; still more to do
Jeremy Hylton <jeremy@alum.mit.edu>
parents:
diff changeset
169 case import_stmt: {
08d937107fe6 Improved __future__ parser; still more to do
Jeremy Hylton <jeremy@alum.mit.edu>
parents:
diff changeset
170 node *name;
08d937107fe6 Improved __future__ parser; still more to do
Jeremy Hylton <jeremy@alum.mit.edu>
parents:
diff changeset
171
08d937107fe6 Improved __future__ parser; still more to do
Jeremy Hylton <jeremy@alum.mit.edu>
parents:
diff changeset
172 if (STR(CHILD(n, 0))[0] != 'f') { /* from */
08d937107fe6 Improved __future__ parser; still more to do
Jeremy Hylton <jeremy@alum.mit.edu>
parents:
diff changeset
173 ff->ff_last_lineno = n->n_lineno;
08d937107fe6 Improved __future__ parser; still more to do
Jeremy Hylton <jeremy@alum.mit.edu>
parents:
diff changeset
174 return 0;
08d937107fe6 Improved __future__ parser; still more to do
Jeremy Hylton <jeremy@alum.mit.edu>
parents:
diff changeset
175 }
08d937107fe6 Improved __future__ parser; still more to do
Jeremy Hylton <jeremy@alum.mit.edu>
parents:
diff changeset
176 name = CHILD(n, 1);
08d937107fe6 Improved __future__ parser; still more to do
Jeremy Hylton <jeremy@alum.mit.edu>
parents:
diff changeset
177 if (strcmp(STR(CHILD(name, 0)), "__future__") != 0)
08d937107fe6 Improved __future__ parser; still more to do
Jeremy Hylton <jeremy@alum.mit.edu>
parents:
diff changeset
178 return 0;
16838
09f6c1372056 Improve SyntaxErrors for bad future statements. Set file and location
Jeremy Hylton <jeremy@alum.mit.edu>
parents: 16824
diff changeset
179 if (future_check_features(ff, n, filename) < 0)
16799
08d937107fe6 Improved __future__ parser; still more to do
Jeremy Hylton <jeremy@alum.mit.edu>
parents:
diff changeset
180 return -1;
16824
d4a315e4094c Need to support single_input explicitly so from __future__ imports
Jeremy Hylton <jeremy@alum.mit.edu>
parents: 16823
diff changeset
181 ff->ff_last_lineno = n->n_lineno + 1;
16799
08d937107fe6 Improved __future__ parser; still more to do
Jeremy Hylton <jeremy@alum.mit.edu>
parents:
diff changeset
182 return 1;
08d937107fe6 Improved __future__ parser; still more to do
Jeremy Hylton <jeremy@alum.mit.edu>
parents:
diff changeset
183 }
08d937107fe6 Improved __future__ parser; still more to do
Jeremy Hylton <jeremy@alum.mit.edu>
parents:
diff changeset
184
16823
acbe74f3a786 Presumed correct compiler pass for future statements
Jeremy Hylton <jeremy@alum.mit.edu>
parents: 16799
diff changeset
185 /* The cases below -- all of them! -- are necessary to find
acbe74f3a786 Presumed correct compiler pass for future statements
Jeremy Hylton <jeremy@alum.mit.edu>
parents: 16799
diff changeset
186 and skip doc strings. */
acbe74f3a786 Presumed correct compiler pass for future statements
Jeremy Hylton <jeremy@alum.mit.edu>
parents: 16799
diff changeset
187 case expr_stmt:
acbe74f3a786 Presumed correct compiler pass for future statements
Jeremy Hylton <jeremy@alum.mit.edu>
parents: 16799
diff changeset
188 case testlist:
acbe74f3a786 Presumed correct compiler pass for future statements
Jeremy Hylton <jeremy@alum.mit.edu>
parents: 16799
diff changeset
189 case test:
acbe74f3a786 Presumed correct compiler pass for future statements
Jeremy Hylton <jeremy@alum.mit.edu>
parents: 16799
diff changeset
190 case and_test:
acbe74f3a786 Presumed correct compiler pass for future statements
Jeremy Hylton <jeremy@alum.mit.edu>
parents: 16799
diff changeset
191 case not_test:
acbe74f3a786 Presumed correct compiler pass for future statements
Jeremy Hylton <jeremy@alum.mit.edu>
parents: 16799
diff changeset
192 case comparison:
acbe74f3a786 Presumed correct compiler pass for future statements
Jeremy Hylton <jeremy@alum.mit.edu>
parents: 16799
diff changeset
193 case expr:
acbe74f3a786 Presumed correct compiler pass for future statements
Jeremy Hylton <jeremy@alum.mit.edu>
parents: 16799
diff changeset
194 case xor_expr:
acbe74f3a786 Presumed correct compiler pass for future statements
Jeremy Hylton <jeremy@alum.mit.edu>
parents: 16799
diff changeset
195 case and_expr:
acbe74f3a786 Presumed correct compiler pass for future statements
Jeremy Hylton <jeremy@alum.mit.edu>
parents: 16799
diff changeset
196 case shift_expr:
acbe74f3a786 Presumed correct compiler pass for future statements
Jeremy Hylton <jeremy@alum.mit.edu>
parents: 16799
diff changeset
197 case arith_expr:
acbe74f3a786 Presumed correct compiler pass for future statements
Jeremy Hylton <jeremy@alum.mit.edu>
parents: 16799
diff changeset
198 case term:
acbe74f3a786 Presumed correct compiler pass for future statements
Jeremy Hylton <jeremy@alum.mit.edu>
parents: 16799
diff changeset
199 case factor:
acbe74f3a786 Presumed correct compiler pass for future statements
Jeremy Hylton <jeremy@alum.mit.edu>
parents: 16799
diff changeset
200 case power:
acbe74f3a786 Presumed correct compiler pass for future statements
Jeremy Hylton <jeremy@alum.mit.edu>
parents: 16799
diff changeset
201 if (NCH(n) == 1) {
acbe74f3a786 Presumed correct compiler pass for future statements
Jeremy Hylton <jeremy@alum.mit.edu>
parents: 16799
diff changeset
202 n = CHILD(n, 0);
acbe74f3a786 Presumed correct compiler pass for future statements
Jeremy Hylton <jeremy@alum.mit.edu>
parents: 16799
diff changeset
203 goto loop;
acbe74f3a786 Presumed correct compiler pass for future statements
Jeremy Hylton <jeremy@alum.mit.edu>
parents: 16799
diff changeset
204 }
acbe74f3a786 Presumed correct compiler pass for future statements
Jeremy Hylton <jeremy@alum.mit.edu>
parents: 16799
diff changeset
205 break;
acbe74f3a786 Presumed correct compiler pass for future statements
Jeremy Hylton <jeremy@alum.mit.edu>
parents: 16799
diff changeset
206
acbe74f3a786 Presumed correct compiler pass for future statements
Jeremy Hylton <jeremy@alum.mit.edu>
parents: 16799
diff changeset
207 case atom:
acbe74f3a786 Presumed correct compiler pass for future statements
Jeremy Hylton <jeremy@alum.mit.edu>
parents: 16799
diff changeset
208 if (TYPE(CHILD(n, 0)) == STRING
acbe74f3a786 Presumed correct compiler pass for future statements
Jeremy Hylton <jeremy@alum.mit.edu>
parents: 16799
diff changeset
209 && ff->ff_found_docstring == 0) {
acbe74f3a786 Presumed correct compiler pass for future statements
Jeremy Hylton <jeremy@alum.mit.edu>
parents: 16799
diff changeset
210 ff->ff_found_docstring = 1;
acbe74f3a786 Presumed correct compiler pass for future statements
Jeremy Hylton <jeremy@alum.mit.edu>
parents: 16799
diff changeset
211 return 0;
acbe74f3a786 Presumed correct compiler pass for future statements
Jeremy Hylton <jeremy@alum.mit.edu>
parents: 16799
diff changeset
212 }
acbe74f3a786 Presumed correct compiler pass for future statements
Jeremy Hylton <jeremy@alum.mit.edu>
parents: 16799
diff changeset
213 ff->ff_last_lineno = n->n_lineno;
acbe74f3a786 Presumed correct compiler pass for future statements
Jeremy Hylton <jeremy@alum.mit.edu>
parents: 16799
diff changeset
214 return 0;
acbe74f3a786 Presumed correct compiler pass for future statements
Jeremy Hylton <jeremy@alum.mit.edu>
parents: 16799
diff changeset
215
16799
08d937107fe6 Improved __future__ parser; still more to do
Jeremy Hylton <jeremy@alum.mit.edu>
parents:
diff changeset
216 default:
08d937107fe6 Improved __future__ parser; still more to do
Jeremy Hylton <jeremy@alum.mit.edu>
parents:
diff changeset
217 ff->ff_last_lineno = n->n_lineno;
08d937107fe6 Improved __future__ parser; still more to do
Jeremy Hylton <jeremy@alum.mit.edu>
parents:
diff changeset
218 return 0;
08d937107fe6 Improved __future__ parser; still more to do
Jeremy Hylton <jeremy@alum.mit.edu>
parents:
diff changeset
219 }
16823
acbe74f3a786 Presumed correct compiler pass for future statements
Jeremy Hylton <jeremy@alum.mit.edu>
parents: 16799
diff changeset
220 return 0;
16799
08d937107fe6 Improved __future__ parser; still more to do
Jeremy Hylton <jeremy@alum.mit.edu>
parents:
diff changeset
221 }
08d937107fe6 Improved __future__ parser; still more to do
Jeremy Hylton <jeremy@alum.mit.edu>
parents:
diff changeset
222
08d937107fe6 Improved __future__ parser; still more to do
Jeremy Hylton <jeremy@alum.mit.edu>
parents:
diff changeset
223 PyFutureFeatures *
08d937107fe6 Improved __future__ parser; still more to do
Jeremy Hylton <jeremy@alum.mit.edu>
parents:
diff changeset
224 PyNode_Future(node *n, char *filename)
08d937107fe6 Improved __future__ parser; still more to do
Jeremy Hylton <jeremy@alum.mit.edu>
parents:
diff changeset
225 {
08d937107fe6 Improved __future__ parser; still more to do
Jeremy Hylton <jeremy@alum.mit.edu>
parents:
diff changeset
226 PyFutureFeatures *ff;
08d937107fe6 Improved __future__ parser; still more to do
Jeremy Hylton <jeremy@alum.mit.edu>
parents:
diff changeset
227
08d937107fe6 Improved __future__ parser; still more to do
Jeremy Hylton <jeremy@alum.mit.edu>
parents:
diff changeset
228 ff = (PyFutureFeatures *)PyMem_Malloc(sizeof(PyFutureFeatures));
08d937107fe6 Improved __future__ parser; still more to do
Jeremy Hylton <jeremy@alum.mit.edu>
parents:
diff changeset
229 if (ff == NULL)
08d937107fe6 Improved __future__ parser; still more to do
Jeremy Hylton <jeremy@alum.mit.edu>
parents:
diff changeset
230 return NULL;
16823
acbe74f3a786 Presumed correct compiler pass for future statements
Jeremy Hylton <jeremy@alum.mit.edu>
parents: 16799
diff changeset
231 ff->ff_found_docstring = 0;
acbe74f3a786 Presumed correct compiler pass for future statements
Jeremy Hylton <jeremy@alum.mit.edu>
parents: 16799
diff changeset
232 ff->ff_last_lineno = -1;
16799
08d937107fe6 Improved __future__ parser; still more to do
Jeremy Hylton <jeremy@alum.mit.edu>
parents:
diff changeset
233 ff->ff_nested_scopes = 0;
08d937107fe6 Improved __future__ parser; still more to do
Jeremy Hylton <jeremy@alum.mit.edu>
parents:
diff changeset
234
16823
acbe74f3a786 Presumed correct compiler pass for future statements
Jeremy Hylton <jeremy@alum.mit.edu>
parents: 16799
diff changeset
235 if (future_parse(ff, n, filename) < 0) {
16799
08d937107fe6 Improved __future__ parser; still more to do
Jeremy Hylton <jeremy@alum.mit.edu>
parents:
diff changeset
236 PyMem_Free((void *)ff);
08d937107fe6 Improved __future__ parser; still more to do
Jeremy Hylton <jeremy@alum.mit.edu>
parents:
diff changeset
237 return NULL;
08d937107fe6 Improved __future__ parser; still more to do
Jeremy Hylton <jeremy@alum.mit.edu>
parents:
diff changeset
238 }
08d937107fe6 Improved __future__ parser; still more to do
Jeremy Hylton <jeremy@alum.mit.edu>
parents:
diff changeset
239 return ff;
08d937107fe6 Improved __future__ parser; still more to do
Jeremy Hylton <jeremy@alum.mit.edu>
parents:
diff changeset
240 }
08d937107fe6 Improved __future__ parser; still more to do
Jeremy Hylton <jeremy@alum.mit.edu>
parents:
diff changeset
241