cpython-lru_cache-weakref: Python/future.c annotate

annotate Python/future.c @ 37639:bc4fbbb2db30 2.4

Ignore the references to the dummy objects used as deleted keys in dicts and sets when computing the total number of references.

author	Armin Rigo <arigo@tunes.org>
date	Wed, 12 Apr 2006 17:06:58 +0000
parents	f7474d31ba3f
children	ef09e26ef099 8259ff3ee493

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
19407 81c7565a56ac Fix SF bug [ #450245 ] Error in parsing future stmts Jeremy Hylton <jeremy@alum.mit.edu> parents: 19158 diff changeset	11 /* FUTURE_POSSIBLE() is provided to accomodate doc strings, which is
81c7565a56ac Fix SF bug [ #450245 ] Error in parsing future stmts Jeremy Hylton <jeremy@alum.mit.edu> parents: 19158 diff changeset	12 the only statement that can occur before a future statement.
81c7565a56ac Fix SF bug [ #450245 ] Error in parsing future stmts Jeremy Hylton <jeremy@alum.mit.edu> parents: 19158 diff changeset	13 */
16823 acbe74f3a786 Presumed correct compiler pass for future statements Jeremy Hylton <jeremy@alum.mit.edu> parents: 16799 diff changeset	14 #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	15
16799 08d937107fe6 Improved __future__ parser; still more to do Jeremy Hylton <jeremy@alum.mit.edu> parents: diff changeset	16 static int
26601 cc05c2c8660e Constify filenames and scripts. Fixes #651362. Martin v. Löwis <martin@v.loewis.de> parents: 22968 diff changeset	17 future_check_features(PyFutureFeatures ff, node n, const char *filename)
16799 08d937107fe6 Improved __future__ parser; still more to do Jeremy Hylton <jeremy@alum.mit.edu> parents: diff changeset	18 {
08d937107fe6 Improved __future__ parser; still more to do Jeremy Hylton <jeremy@alum.mit.edu> parents: diff changeset	19 int i;
08d937107fe6 Improved __future__ parser; still more to do Jeremy Hylton <jeremy@alum.mit.edu> parents: diff changeset	20 char *feature;
33353 f7474d31ba3f SF patch #1007189, multi-line imports, for instance: Anthony Baxter <anthonybaxter@gmail.com> parents: 26601 diff changeset	21 node ch, nn;
16799 08d937107fe6 Improved __future__ parser; still more to do Jeremy Hylton <jeremy@alum.mit.edu> parents: diff changeset	22
33353 f7474d31ba3f SF patch #1007189, multi-line imports, for instance: Anthony Baxter <anthonybaxter@gmail.com> parents: 26601 diff changeset	23 REQ(n, import_from);
f7474d31ba3f SF patch #1007189, multi-line imports, for instance: Anthony Baxter <anthonybaxter@gmail.com> parents: 26601 diff changeset	24 nn = CHILD(n, 3 + (TYPE(CHILD(n, 3)) == LPAR));
f7474d31ba3f SF patch #1007189, multi-line imports, for instance: Anthony Baxter <anthonybaxter@gmail.com> parents: 26601 diff changeset	25 if (TYPE(nn) == STAR) {
f7474d31ba3f SF patch #1007189, multi-line imports, for instance: Anthony Baxter <anthonybaxter@gmail.com> parents: 26601 diff changeset	26 PyErr_SetString(PyExc_SyntaxError, FUTURE_IMPORT_STAR);
f7474d31ba3f SF patch #1007189, multi-line imports, for instance: Anthony Baxter <anthonybaxter@gmail.com> parents: 26601 diff changeset	27 PyErr_SyntaxLocation(filename, nn->n_lineno);
f7474d31ba3f SF patch #1007189, multi-line imports, for instance: Anthony Baxter <anthonybaxter@gmail.com> parents: 26601 diff changeset	28 return -1;
f7474d31ba3f SF patch #1007189, multi-line imports, for instance: Anthony Baxter <anthonybaxter@gmail.com> parents: 26601 diff changeset	29 }
f7474d31ba3f SF patch #1007189, multi-line imports, for instance: Anthony Baxter <anthonybaxter@gmail.com> parents: 26601 diff changeset	30 REQ(nn, import_as_names);
f7474d31ba3f SF patch #1007189, multi-line imports, for instance: Anthony Baxter <anthonybaxter@gmail.com> parents: 26601 diff changeset	31 for (i = 0; i < NCH(nn); i += 2) {
f7474d31ba3f SF patch #1007189, multi-line imports, for instance: Anthony Baxter <anthonybaxter@gmail.com> parents: 26601 diff changeset	32 ch = CHILD(nn, i);
16838 09f6c1372056 Improve SyntaxErrors for bad future statements. Set file and location Jeremy Hylton <jeremy@alum.mit.edu> parents: 16824 diff changeset	33 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	34 feature = STR(CHILD(ch, 0));
16799 08d937107fe6 Improved __future__ parser; still more to do Jeremy Hylton <jeremy@alum.mit.edu> parents: diff changeset	35 if (strcmp(feature, FUTURE_NESTED_SCOPES) == 0) {
19158 97a3d3d7029f Refactor future feature handling Jeremy Hylton <jeremy@alum.mit.edu> parents: 19051 diff changeset	36 continue;
18609 59446d0f8341 Preliminary support for "from __future__ import generators" to enable Guido van Rossum <guido@python.org> parents: 17018 diff changeset	37 } else if (strcmp(feature, FUTURE_GENERATORS) == 0) {
22968 ba0236f84318 Removed more hair in support of future-generator stmts. Tim Peters <tim.peters@gmail.com> parents: 19407 diff changeset	38 continue;
19051 f20727cc3d0f Implement PEP 238 in its (almost) full glory. Guido van Rossum <guido@python.org> parents: 18612 diff changeset	39 } else if (strcmp(feature, FUTURE_DIVISION) == 0) {
19158 97a3d3d7029f Refactor future feature handling Jeremy Hylton <jeremy@alum.mit.edu> parents: 19051 diff changeset	40 ff->ff_features \|= CO_FUTURE_DIVISION;
16838 09f6c1372056 Improve SyntaxErrors for bad future statements. Set file and location Jeremy Hylton <jeremy@alum.mit.edu> parents: 16824 diff changeset	41 } 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	42 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	43 "not a chance");
09f6c1372056 Improve SyntaxErrors for bad future statements. Set file and location Jeremy Hylton <jeremy@alum.mit.edu> parents: 16824 diff changeset	44 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	45 return -1;
16799 08d937107fe6 Improved __future__ parser; still more to do Jeremy Hylton <jeremy@alum.mit.edu> parents: diff changeset	46 } else {
08d937107fe6 Improved __future__ parser; still more to do Jeremy Hylton <jeremy@alum.mit.edu> parents: diff changeset	47 PyErr_Format(PyExc_SyntaxError,
08d937107fe6 Improved __future__ parser; still more to do Jeremy Hylton <jeremy@alum.mit.edu> parents: diff changeset	48 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	49 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	50 return -1;
08d937107fe6 Improved __future__ parser; still more to do Jeremy Hylton <jeremy@alum.mit.edu> parents: diff changeset	51 }
08d937107fe6 Improved __future__ parser; still more to do Jeremy Hylton <jeremy@alum.mit.edu> parents: diff changeset	52 }
08d937107fe6 Improved __future__ parser; still more to do Jeremy Hylton <jeremy@alum.mit.edu> parents: diff changeset	53 return 0;
08d937107fe6 Improved __future__ parser; still more to do Jeremy Hylton <jeremy@alum.mit.edu> parents: diff changeset	54 }
08d937107fe6 Improved __future__ parser; still more to do Jeremy Hylton <jeremy@alum.mit.edu> parents: diff changeset	55
16823 acbe74f3a786 Presumed correct compiler pass for future statements Jeremy Hylton <jeremy@alum.mit.edu> parents: 16799 diff changeset	56 static void
26601 cc05c2c8660e Constify filenames and scripts. Fixes #651362. Martin v. Löwis <martin@v.loewis.de> parents: 22968 diff changeset	57 future_error(node n, const char filename)
16823 acbe74f3a786 Presumed correct compiler pass for future statements Jeremy Hylton <jeremy@alum.mit.edu> parents: 16799 diff changeset	58 {
acbe74f3a786 Presumed correct compiler pass for future statements Jeremy Hylton <jeremy@alum.mit.edu> parents: 16799 diff changeset	59 PyErr_SetString(PyExc_SyntaxError,
acbe74f3a786 Presumed correct compiler pass for future statements Jeremy Hylton <jeremy@alum.mit.edu> parents: 16799 diff changeset	60 "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	61 "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	62 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	63 }
acbe74f3a786 Presumed correct compiler pass for future statements Jeremy Hylton <jeremy@alum.mit.edu> parents: 16799 diff changeset	64
16799 08d937107fe6 Improved __future__ parser; still more to do Jeremy Hylton <jeremy@alum.mit.edu> parents: diff changeset	65 /* Relevant portions of the grammar:
08d937107fe6 Improved __future__ parser; still more to do Jeremy Hylton <jeremy@alum.mit.edu> parents: diff changeset	66
08d937107fe6 Improved __future__ parser; still more to do Jeremy Hylton <jeremy@alum.mit.edu> parents: diff changeset	67 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	68 file_input: (NEWLINE \| stmt)* ENDMARKER
08d937107fe6 Improved __future__ parser; still more to do Jeremy Hylton <jeremy@alum.mit.edu> parents: diff changeset	69 stmt: simple_stmt \| compound_stmt
08d937107fe6 Improved __future__ parser; still more to do Jeremy Hylton <jeremy@alum.mit.edu> parents: diff changeset	70 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	71 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	72 \| 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	73 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	74 \| '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	75 import_as_name: NAME [NAME NAME]
08d937107fe6 Improved __future__ parser; still more to do Jeremy Hylton <jeremy@alum.mit.edu> parents: diff changeset	76 dotted_as_name: dotted_name [NAME NAME]
08d937107fe6 Improved __future__ parser; still more to do Jeremy Hylton <jeremy@alum.mit.edu> parents: diff changeset	77 dotted_name: NAME ('.' NAME)*
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
19407 81c7565a56ac Fix SF bug [ #450245 ] Error in parsing future stmts Jeremy Hylton <jeremy@alum.mit.edu> parents: 19158 diff changeset	80 /* future_parse() finds future statements at the beginnning of a
81c7565a56ac Fix SF bug [ #450245 ] Error in parsing future stmts Jeremy Hylton <jeremy@alum.mit.edu> parents: 19158 diff changeset	81 module. The function calls itself recursively, rather than
81c7565a56ac Fix SF bug [ #450245 ] Error in parsing future stmts Jeremy Hylton <jeremy@alum.mit.edu> parents: 19158 diff changeset	82 factoring out logic for different kinds of statements into
81c7565a56ac Fix SF bug [ #450245 ] Error in parsing future stmts Jeremy Hylton <jeremy@alum.mit.edu> parents: 19158 diff changeset	83 different routines.
81c7565a56ac Fix SF bug [ #450245 ] Error in parsing future stmts Jeremy Hylton <jeremy@alum.mit.edu> parents: 19158 diff changeset	84
81c7565a56ac Fix SF bug [ #450245 ] Error in parsing future stmts Jeremy Hylton <jeremy@alum.mit.edu> parents: 19158 diff changeset	85 Return values:
16799 08d937107fe6 Improved __future__ parser; still more to do Jeremy Hylton <jeremy@alum.mit.edu> parents: diff changeset	86 -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	87 0 indicates no feature was found
08d937107fe6 Improved __future__ parser; still more to do Jeremy Hylton <jeremy@alum.mit.edu> parents: diff changeset	88 1 indicates a feature was found
08d937107fe6 Improved __future__ parser; still more to do Jeremy Hylton <jeremy@alum.mit.edu> parents: diff changeset	89 */
08d937107fe6 Improved __future__ parser; still more to do Jeremy Hylton <jeremy@alum.mit.edu> parents: diff changeset	90
08d937107fe6 Improved __future__ parser; still more to do Jeremy Hylton <jeremy@alum.mit.edu> parents: diff changeset	91 static int
26601 cc05c2c8660e Constify filenames and scripts. Fixes #651362. Martin v. Löwis <martin@v.loewis.de> parents: 22968 diff changeset	92 future_parse(PyFutureFeatures ff, node n, const char *filename)
16799 08d937107fe6 Improved __future__ parser; still more to do Jeremy Hylton <jeremy@alum.mit.edu> parents: diff changeset	93 {
16823 acbe74f3a786 Presumed correct compiler pass for future statements Jeremy Hylton <jeremy@alum.mit.edu> parents: 16799 diff changeset	94 int i, r;
16799 08d937107fe6 Improved __future__ parser; still more to do Jeremy Hylton <jeremy@alum.mit.edu> parents: diff changeset	95 loop:
08d937107fe6 Improved __future__ parser; still more to do Jeremy Hylton <jeremy@alum.mit.edu> parents: diff changeset	96
08d937107fe6 Improved __future__ parser; still more to do Jeremy Hylton <jeremy@alum.mit.edu> parents: diff changeset	97 switch (TYPE(n)) {
08d937107fe6 Improved __future__ parser; still more to do Jeremy Hylton <jeremy@alum.mit.edu> parents: diff changeset	98
16824 d4a315e4094c Need to support single_input explicitly so from __future__ imports Jeremy Hylton <jeremy@alum.mit.edu> parents: 16823 diff changeset	99 case single_input:
d4a315e4094c Need to support single_input explicitly so from __future__ imports Jeremy Hylton <jeremy@alum.mit.edu> parents: 16823 diff changeset	100 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	101 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	102 goto loop;
d4a315e4094c Need to support single_input explicitly so from __future__ imports Jeremy Hylton <jeremy@alum.mit.edu> parents: 16823 diff changeset	103 }
d4a315e4094c Need to support single_input explicitly so from __future__ imports Jeremy Hylton <jeremy@alum.mit.edu> parents: 16823 diff changeset	104 return 0;
d4a315e4094c Need to support single_input explicitly so from __future__ imports Jeremy Hylton <jeremy@alum.mit.edu> parents: 16823 diff changeset	105
16799 08d937107fe6 Improved __future__ parser; still more to do Jeremy Hylton <jeremy@alum.mit.edu> parents: diff changeset	106 case file_input:
19407 81c7565a56ac Fix SF bug [ #450245 ] Error in parsing future stmts Jeremy Hylton <jeremy@alum.mit.edu> parents: 19158 diff changeset	107 /* Check each statement in the file, starting with the
81c7565a56ac Fix SF bug [ #450245 ] Error in parsing future stmts Jeremy Hylton <jeremy@alum.mit.edu> parents: 19158 diff changeset	108 first, and continuing until the first statement
81c7565a56ac Fix SF bug [ #450245 ] Error in parsing future stmts Jeremy Hylton <jeremy@alum.mit.edu> parents: 19158 diff changeset	109 that isn't a future statement.
81c7565a56ac Fix SF bug [ #450245 ] Error in parsing future stmts Jeremy Hylton <jeremy@alum.mit.edu> parents: 19158 diff changeset	110 */
16799 08d937107fe6 Improved __future__ parser; still more to do Jeremy Hylton <jeremy@alum.mit.edu> parents: diff changeset	111 for (i = 0; i < NCH(n); i++) {
08d937107fe6 Improved __future__ parser; still more to do Jeremy Hylton <jeremy@alum.mit.edu> parents: diff changeset	112 node *ch = CHILD(n, i);
08d937107fe6 Improved __future__ parser; still more to do Jeremy Hylton <jeremy@alum.mit.edu> parents: diff changeset	113 if (TYPE(ch) == stmt) {
16823 acbe74f3a786 Presumed correct compiler pass for future statements Jeremy Hylton <jeremy@alum.mit.edu> parents: 16799 diff changeset	114 r = future_parse(ff, ch, filename);
19407 81c7565a56ac Fix SF bug [ #450245 ] Error in parsing future stmts Jeremy Hylton <jeremy@alum.mit.edu> parents: 19158 diff changeset	115 /* Need to check both conditions below
81c7565a56ac Fix SF bug [ #450245 ] Error in parsing future stmts Jeremy Hylton <jeremy@alum.mit.edu> parents: 19158 diff changeset	116 to accomodate doc strings, which
81c7565a56ac Fix SF bug [ #450245 ] Error in parsing future stmts Jeremy Hylton <jeremy@alum.mit.edu> parents: 19158 diff changeset	117 causes r < 0.
81c7565a56ac Fix SF bug [ #450245 ] Error in parsing future stmts Jeremy Hylton <jeremy@alum.mit.edu> parents: 19158 diff changeset	118 */
81c7565a56ac Fix SF bug [ #450245 ] Error in parsing future stmts Jeremy Hylton <jeremy@alum.mit.edu> parents: 19158 diff changeset	119 if (r < 1 && !FUTURE_POSSIBLE(ff))
16823 acbe74f3a786 Presumed correct compiler pass for future statements Jeremy Hylton <jeremy@alum.mit.edu> parents: 16799 diff changeset	120 return r;
16799 08d937107fe6 Improved __future__ parser; still more to do Jeremy Hylton <jeremy@alum.mit.edu> parents: diff changeset	121 }
08d937107fe6 Improved __future__ parser; still more to do Jeremy Hylton <jeremy@alum.mit.edu> parents: diff changeset	122 }
08d937107fe6 Improved __future__ parser; still more to do Jeremy Hylton <jeremy@alum.mit.edu> parents: diff changeset	123 return 0;
08d937107fe6 Improved __future__ parser; still more to do Jeremy Hylton <jeremy@alum.mit.edu> parents: diff changeset	124
08d937107fe6 Improved __future__ parser; still more to do Jeremy Hylton <jeremy@alum.mit.edu> parents: diff changeset	125 case simple_stmt:
16823 acbe74f3a786 Presumed correct compiler pass for future statements Jeremy Hylton <jeremy@alum.mit.edu> parents: 16799 diff changeset	126 if (NCH(n) == 2) {
16799 08d937107fe6 Improved __future__ parser; still more to do Jeremy Hylton <jeremy@alum.mit.edu> parents: diff changeset	127 REQ(CHILD(n, 0), small_stmt);
08d937107fe6 Improved __future__ parser; still more to do Jeremy Hylton <jeremy@alum.mit.edu> parents: diff changeset	128 n = CHILD(n, 0);
08d937107fe6 Improved __future__ parser; still more to do Jeremy Hylton <jeremy@alum.mit.edu> parents: diff changeset	129 goto loop;
16823 acbe74f3a786 Presumed correct compiler pass for future statements Jeremy Hylton <jeremy@alum.mit.edu> parents: 16799 diff changeset	130 } else {
acbe74f3a786 Presumed correct compiler pass for future statements Jeremy Hylton <jeremy@alum.mit.edu> parents: 16799 diff changeset	131 /* 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	132 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	133 future statement follows some other
acbe74f3a786 Presumed correct compiler pass for future statements Jeremy Hylton <jeremy@alum.mit.edu> parents: 16799 diff changeset	134 statement, the SyntaxError is raised here.
acbe74f3a786 Presumed correct compiler pass for future statements Jeremy Hylton <jeremy@alum.mit.edu> parents: 16799 diff changeset	135 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	136 raises the exception.
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 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	139
acbe74f3a786 Presumed correct compiler pass for future statements Jeremy Hylton <jeremy@alum.mit.edu> parents: 16799 diff changeset	140 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	141 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	142 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	143 filename);
acbe74f3a786 Presumed correct compiler pass for future statements Jeremy Hylton <jeremy@alum.mit.edu> parents: 16799 diff changeset	144 if (r < 1)
acbe74f3a786 Presumed correct compiler pass for future statements Jeremy Hylton <jeremy@alum.mit.edu> parents: 16799 diff changeset	145 end_of_future = 1;
acbe74f3a786 Presumed correct compiler pass for future statements Jeremy Hylton <jeremy@alum.mit.edu> parents: 16799 diff changeset	146 else {
acbe74f3a786 Presumed correct compiler pass for future statements Jeremy Hylton <jeremy@alum.mit.edu> parents: 16799 diff changeset	147 found = 1;
acbe74f3a786 Presumed correct compiler pass for future statements Jeremy Hylton <jeremy@alum.mit.edu> parents: 16799 diff changeset	148 if (end_of_future) {
acbe74f3a786 Presumed correct compiler pass for future statements Jeremy Hylton <jeremy@alum.mit.edu> parents: 16799 diff changeset	149 future_error(n,
acbe74f3a786 Presumed correct compiler pass for future statements Jeremy Hylton <jeremy@alum.mit.edu> parents: 16799 diff changeset	150 filename);
acbe74f3a786 Presumed correct compiler pass for future statements Jeremy Hylton <jeremy@alum.mit.edu> parents: 16799 diff changeset	151 return -1;
acbe74f3a786 Presumed correct compiler pass for future statements Jeremy Hylton <jeremy@alum.mit.edu> parents: 16799 diff changeset	152 }
acbe74f3a786 Presumed correct compiler pass for future statements Jeremy Hylton <jeremy@alum.mit.edu> parents: 16799 diff changeset	153 }
acbe74f3a786 Presumed correct compiler pass for future statements Jeremy Hylton <jeremy@alum.mit.edu> parents: 16799 diff changeset	154 }
acbe74f3a786 Presumed correct compiler pass for future statements Jeremy Hylton <jeremy@alum.mit.edu> parents: 16799 diff changeset	155 }
acbe74f3a786 Presumed correct compiler pass for future statements Jeremy Hylton <jeremy@alum.mit.edu> parents: 16799 diff changeset	156
acbe74f3a786 Presumed correct compiler pass for future statements Jeremy Hylton <jeremy@alum.mit.edu> parents: 16799 diff changeset	157 /* 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	158 current lineno is legal.
acbe74f3a786 Presumed correct compiler pass for future statements Jeremy Hylton <jeremy@alum.mit.edu> parents: 16799 diff changeset	159 */
acbe74f3a786 Presumed correct compiler pass for future statements Jeremy Hylton <jeremy@alum.mit.edu> parents: 16799 diff changeset	160 if (found)
acbe74f3a786 Presumed correct compiler pass for future statements Jeremy Hylton <jeremy@alum.mit.edu> parents: 16799 diff changeset	161 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	162 else
acbe74f3a786 Presumed correct compiler pass for future statements Jeremy Hylton <jeremy@alum.mit.edu> parents: 16799 diff changeset	163 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	164
acbe74f3a786 Presumed correct compiler pass for future statements Jeremy Hylton <jeremy@alum.mit.edu> parents: 16799 diff changeset	165 if (end_of_future && found)
acbe74f3a786 Presumed correct compiler pass for future statements Jeremy Hylton <jeremy@alum.mit.edu> parents: 16799 diff changeset	166 return 1;
acbe74f3a786 Presumed correct compiler pass for future statements Jeremy Hylton <jeremy@alum.mit.edu> parents: 16799 diff changeset	167 else
acbe74f3a786 Presumed correct compiler pass for future statements Jeremy Hylton <jeremy@alum.mit.edu> parents: 16799 diff changeset	168 return 0;
16799 08d937107fe6 Improved __future__ parser; still more to do Jeremy Hylton <jeremy@alum.mit.edu> parents: diff changeset	169 }
08d937107fe6 Improved __future__ parser; still more to do Jeremy Hylton <jeremy@alum.mit.edu> parents: diff changeset	170
08d937107fe6 Improved __future__ parser; still more to do Jeremy Hylton <jeremy@alum.mit.edu> parents: diff changeset	171 case stmt:
08d937107fe6 Improved __future__ parser; still more to do Jeremy Hylton <jeremy@alum.mit.edu> parents: diff changeset	172 if (TYPE(CHILD(n, 0)) == simple_stmt) {
08d937107fe6 Improved __future__ parser; still more to do Jeremy Hylton <jeremy@alum.mit.edu> parents: diff changeset	173 n = CHILD(n, 0);
08d937107fe6 Improved __future__ parser; still more to do Jeremy Hylton <jeremy@alum.mit.edu> parents: diff changeset	174 goto loop;
16823 acbe74f3a786 Presumed correct compiler pass for future statements Jeremy Hylton <jeremy@alum.mit.edu> parents: 16799 diff changeset	175 } 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	176 n = CHILD(n, 0);
acbe74f3a786 Presumed correct compiler pass for future statements Jeremy Hylton <jeremy@alum.mit.edu> parents: 16799 diff changeset	177 goto loop;
16799 08d937107fe6 Improved __future__ parser; still more to do Jeremy Hylton <jeremy@alum.mit.edu> parents: diff changeset	178 } else {
08d937107fe6 Improved __future__ parser; still more to do Jeremy Hylton <jeremy@alum.mit.edu> parents: diff changeset	179 REQ(CHILD(n, 0), compound_stmt);
08d937107fe6 Improved __future__ parser; still more to do Jeremy Hylton <jeremy@alum.mit.edu> parents: diff changeset	180 ff->ff_last_lineno = n->n_lineno;
08d937107fe6 Improved __future__ parser; still more to do Jeremy Hylton <jeremy@alum.mit.edu> parents: diff changeset	181 return 0;
08d937107fe6 Improved __future__ parser; still more to do Jeremy Hylton <jeremy@alum.mit.edu> parents: diff changeset	182 }
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 case small_stmt:
08d937107fe6 Improved __future__ parser; still more to do Jeremy Hylton <jeremy@alum.mit.edu> parents: diff changeset	185 n = CHILD(n, 0);
08d937107fe6 Improved __future__ parser; still more to do Jeremy Hylton <jeremy@alum.mit.edu> parents: diff changeset	186 goto loop;
08d937107fe6 Improved __future__ parser; still more to do Jeremy Hylton <jeremy@alum.mit.edu> parents: diff changeset	187
08d937107fe6 Improved __future__ parser; still more to do Jeremy Hylton <jeremy@alum.mit.edu> parents: diff changeset	188 case import_stmt: {
08d937107fe6 Improved __future__ parser; still more to do Jeremy Hylton <jeremy@alum.mit.edu> parents: diff changeset	189 node *name;
08d937107fe6 Improved __future__ parser; still more to do Jeremy Hylton <jeremy@alum.mit.edu> parents: diff changeset	190
33353 f7474d31ba3f SF patch #1007189, multi-line imports, for instance: Anthony Baxter <anthonybaxter@gmail.com> parents: 26601 diff changeset	191 n = CHILD(n, 0);
f7474d31ba3f SF patch #1007189, multi-line imports, for instance: Anthony Baxter <anthonybaxter@gmail.com> parents: 26601 diff changeset	192 if (TYPE(n) != import_from) {
16799 08d937107fe6 Improved __future__ parser; still more to do Jeremy Hylton <jeremy@alum.mit.edu> parents: diff changeset	193 ff->ff_last_lineno = n->n_lineno;
08d937107fe6 Improved __future__ parser; still more to do Jeremy Hylton <jeremy@alum.mit.edu> parents: diff changeset	194 return 0;
08d937107fe6 Improved __future__ parser; still more to do Jeremy Hylton <jeremy@alum.mit.edu> parents: diff changeset	195 }
08d937107fe6 Improved __future__ parser; still more to do Jeremy Hylton <jeremy@alum.mit.edu> parents: diff changeset	196 name = CHILD(n, 1);
08d937107fe6 Improved __future__ parser; still more to do Jeremy Hylton <jeremy@alum.mit.edu> parents: diff changeset	197 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	198 return 0;
16838 09f6c1372056 Improve SyntaxErrors for bad future statements. Set file and location Jeremy Hylton <jeremy@alum.mit.edu> parents: 16824 diff changeset	199 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	200 return -1;
16824 d4a315e4094c Need to support single_input explicitly so from __future__ imports Jeremy Hylton <jeremy@alum.mit.edu> parents: 16823 diff changeset	201 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	202 return 1;
08d937107fe6 Improved __future__ parser; still more to do Jeremy Hylton <jeremy@alum.mit.edu> parents: diff changeset	203 }
08d937107fe6 Improved __future__ parser; still more to do Jeremy Hylton <jeremy@alum.mit.edu> parents: diff changeset	204
16823 acbe74f3a786 Presumed correct compiler pass for future statements Jeremy Hylton <jeremy@alum.mit.edu> parents: 16799 diff changeset	205 /* 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	206 and skip doc strings. */
acbe74f3a786 Presumed correct compiler pass for future statements Jeremy Hylton <jeremy@alum.mit.edu> parents: 16799 diff changeset	207 case expr_stmt:
acbe74f3a786 Presumed correct compiler pass for future statements Jeremy Hylton <jeremy@alum.mit.edu> parents: 16799 diff changeset	208 case testlist:
acbe74f3a786 Presumed correct compiler pass for future statements Jeremy Hylton <jeremy@alum.mit.edu> parents: 16799 diff changeset	209 case test:
acbe74f3a786 Presumed correct compiler pass for future statements Jeremy Hylton <jeremy@alum.mit.edu> parents: 16799 diff changeset	210 case and_test:
acbe74f3a786 Presumed correct compiler pass for future statements Jeremy Hylton <jeremy@alum.mit.edu> parents: 16799 diff changeset	211 case not_test:
acbe74f3a786 Presumed correct compiler pass for future statements Jeremy Hylton <jeremy@alum.mit.edu> parents: 16799 diff changeset	212 case comparison:
acbe74f3a786 Presumed correct compiler pass for future statements Jeremy Hylton <jeremy@alum.mit.edu> parents: 16799 diff changeset	213 case expr:
acbe74f3a786 Presumed correct compiler pass for future statements Jeremy Hylton <jeremy@alum.mit.edu> parents: 16799 diff changeset	214 case xor_expr:
acbe74f3a786 Presumed correct compiler pass for future statements Jeremy Hylton <jeremy@alum.mit.edu> parents: 16799 diff changeset	215 case and_expr:
acbe74f3a786 Presumed correct compiler pass for future statements Jeremy Hylton <jeremy@alum.mit.edu> parents: 16799 diff changeset	216 case shift_expr:
acbe74f3a786 Presumed correct compiler pass for future statements Jeremy Hylton <jeremy@alum.mit.edu> parents: 16799 diff changeset	217 case arith_expr:
acbe74f3a786 Presumed correct compiler pass for future statements Jeremy Hylton <jeremy@alum.mit.edu> parents: 16799 diff changeset	218 case term:
acbe74f3a786 Presumed correct compiler pass for future statements Jeremy Hylton <jeremy@alum.mit.edu> parents: 16799 diff changeset	219 case factor:
acbe74f3a786 Presumed correct compiler pass for future statements Jeremy Hylton <jeremy@alum.mit.edu> parents: 16799 diff changeset	220 case power:
acbe74f3a786 Presumed correct compiler pass for future statements Jeremy Hylton <jeremy@alum.mit.edu> parents: 16799 diff changeset	221 if (NCH(n) == 1) {
acbe74f3a786 Presumed correct compiler pass for future statements Jeremy Hylton <jeremy@alum.mit.edu> parents: 16799 diff changeset	222 n = CHILD(n, 0);
acbe74f3a786 Presumed correct compiler pass for future statements Jeremy Hylton <jeremy@alum.mit.edu> parents: 16799 diff changeset	223 goto loop;
acbe74f3a786 Presumed correct compiler pass for future statements Jeremy Hylton <jeremy@alum.mit.edu> parents: 16799 diff changeset	224 }
acbe74f3a786 Presumed correct compiler pass for future statements Jeremy Hylton <jeremy@alum.mit.edu> parents: 16799 diff changeset	225 break;
acbe74f3a786 Presumed correct compiler pass for future statements Jeremy Hylton <jeremy@alum.mit.edu> parents: 16799 diff changeset	226
acbe74f3a786 Presumed correct compiler pass for future statements Jeremy Hylton <jeremy@alum.mit.edu> parents: 16799 diff changeset	227 case atom:
acbe74f3a786 Presumed correct compiler pass for future statements Jeremy Hylton <jeremy@alum.mit.edu> parents: 16799 diff changeset	228 if (TYPE(CHILD(n, 0)) == STRING
acbe74f3a786 Presumed correct compiler pass for future statements Jeremy Hylton <jeremy@alum.mit.edu> parents: 16799 diff changeset	229 && ff->ff_found_docstring == 0) {
acbe74f3a786 Presumed correct compiler pass for future statements Jeremy Hylton <jeremy@alum.mit.edu> parents: 16799 diff changeset	230 ff->ff_found_docstring = 1;
acbe74f3a786 Presumed correct compiler pass for future statements Jeremy Hylton <jeremy@alum.mit.edu> parents: 16799 diff changeset	231 return 0;
acbe74f3a786 Presumed correct compiler pass for future statements Jeremy Hylton <jeremy@alum.mit.edu> parents: 16799 diff changeset	232 }
acbe74f3a786 Presumed correct compiler pass for future statements Jeremy Hylton <jeremy@alum.mit.edu> parents: 16799 diff changeset	233 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	234 return 0;
acbe74f3a786 Presumed correct compiler pass for future statements Jeremy Hylton <jeremy@alum.mit.edu> parents: 16799 diff changeset	235
16799 08d937107fe6 Improved __future__ parser; still more to do Jeremy Hylton <jeremy@alum.mit.edu> parents: diff changeset	236 default:
08d937107fe6 Improved __future__ parser; still more to do Jeremy Hylton <jeremy@alum.mit.edu> parents: diff changeset	237 ff->ff_last_lineno = n->n_lineno;
08d937107fe6 Improved __future__ parser; still more to do Jeremy Hylton <jeremy@alum.mit.edu> parents: diff changeset	238 return 0;
08d937107fe6 Improved __future__ parser; still more to do Jeremy Hylton <jeremy@alum.mit.edu> parents: diff changeset	239 }
16823 acbe74f3a786 Presumed correct compiler pass for future statements Jeremy Hylton <jeremy@alum.mit.edu> parents: 16799 diff changeset	240 return 0;
16799 08d937107fe6 Improved __future__ parser; still more to do Jeremy Hylton <jeremy@alum.mit.edu> parents: diff changeset	241 }
08d937107fe6 Improved __future__ parser; still more to do Jeremy Hylton <jeremy@alum.mit.edu> parents: diff changeset	242
08d937107fe6 Improved __future__ parser; still more to do Jeremy Hylton <jeremy@alum.mit.edu> parents: diff changeset	243 PyFutureFeatures *
26601 cc05c2c8660e Constify filenames and scripts. Fixes #651362. Martin v. Löwis <martin@v.loewis.de> parents: 22968 diff changeset	244 PyNode_Future(node n, const char filename)
16799 08d937107fe6 Improved __future__ parser; still more to do Jeremy Hylton <jeremy@alum.mit.edu> parents: diff changeset	245 {
08d937107fe6 Improved __future__ parser; still more to do Jeremy Hylton <jeremy@alum.mit.edu> parents: diff changeset	246 PyFutureFeatures *ff;
08d937107fe6 Improved __future__ parser; still more to do Jeremy Hylton <jeremy@alum.mit.edu> parents: diff changeset	247
08d937107fe6 Improved __future__ parser; still more to do Jeremy Hylton <jeremy@alum.mit.edu> parents: diff changeset	248 ff = (PyFutureFeatures *)PyMem_Malloc(sizeof(PyFutureFeatures));
08d937107fe6 Improved __future__ parser; still more to do Jeremy Hylton <jeremy@alum.mit.edu> parents: diff changeset	249 if (ff == NULL)
08d937107fe6 Improved __future__ parser; still more to do Jeremy Hylton <jeremy@alum.mit.edu> parents: diff changeset	250 return NULL;
16823 acbe74f3a786 Presumed correct compiler pass for future statements Jeremy Hylton <jeremy@alum.mit.edu> parents: 16799 diff changeset	251 ff->ff_found_docstring = 0;
acbe74f3a786 Presumed correct compiler pass for future statements Jeremy Hylton <jeremy@alum.mit.edu> parents: 16799 diff changeset	252 ff->ff_last_lineno = -1;
19158 97a3d3d7029f Refactor future feature handling Jeremy Hylton <jeremy@alum.mit.edu> parents: 19051 diff changeset	253 ff->ff_features = 0;
16799 08d937107fe6 Improved __future__ parser; still more to do Jeremy Hylton <jeremy@alum.mit.edu> parents: diff changeset	254
16823 acbe74f3a786 Presumed correct compiler pass for future statements Jeremy Hylton <jeremy@alum.mit.edu> parents: 16799 diff changeset	255 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	256 PyMem_Free((void *)ff);
08d937107fe6 Improved __future__ parser; still more to do Jeremy Hylton <jeremy@alum.mit.edu> parents: diff changeset	257 return NULL;
08d937107fe6 Improved __future__ parser; still more to do Jeremy Hylton <jeremy@alum.mit.edu> parents: diff changeset	258 }
08d937107fe6 Improved __future__ parser; still more to do Jeremy Hylton <jeremy@alum.mit.edu> parents: diff changeset	259 return ff;
08d937107fe6 Improved __future__ parser; still more to do Jeremy Hylton <jeremy@alum.mit.edu> parents: diff changeset	260 }
08d937107fe6 Improved __future__ parser; still more to do Jeremy Hylton <jeremy@alum.mit.edu> parents: diff changeset	261

Mercurial > cpython-lru_cache-weakref

annotate Python/future.c @ 37639:bc4fbbb2db30 2.4