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Improve SyntaxErrors for bad future statements. Set file and location

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for errors raised in future.c.

Move some helper functions from compile.c to errors.c and make them
API functions: PyErr_SyntaxLocation() and PyErr_ProgramText().
This commit is contained in:
Jeremy Hylton 2001-02-28 17:47:12 +00:00
parent 5687ffe0c5
commit ad3d3f2f3f
4 changed files with 113 additions and 94 deletions
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34
Python/future.c
View file

@ -6,24 +6,40 @@
#include "symtable.h"
#define UNDEFINED_FUTURE_FEATURE "future feature %.100s is not defined"
#define FUTURE_IMPORT_STAR "future statement does not support import *"
#define FUTURE_POSSIBLE(FF) ((FF)->ff_last_lineno == -1)
static int
future_check_features(PyFutureFeatures *ff, node *n)
future_check_features(PyFutureFeatures *ff, node *n, char *filename)
{
int i;
char *feature;
node *ch;
REQ(n, import_stmt); /* must by from __future__ import ... */
for (i = 3; i < NCH(n); ++i) {
feature = STR(CHILD(CHILD(n, i), 0));
ch = CHILD(n, i);
if (TYPE(ch) == STAR) {
PyErr_SetString(PyExc_SyntaxError,
FUTURE_IMPORT_STAR);
PyErr_SyntaxLocation(filename, ch->n_lineno);
return -1;
}
REQ(ch, import_as_name);
feature = STR(CHILD(ch, 0));
if (strcmp(feature, FUTURE_NESTED_SCOPES) == 0) {
ff->ff_nested_scopes = 1;
} else if (strcmp(feature, "braces") == 0) {
PyErr_SetString(PyExc_SyntaxError,
"not a chance");
PyErr_SyntaxLocation(filename, CHILD(ch, 0)->n_lineno);
return -1;
} else {
PyErr_Format(PyExc_SyntaxError,
UNDEFINED_FUTURE_FEATURE, feature);
PyErr_SyntaxLocation(filename, CHILD(ch, 0)->n_lineno);
return -1;
}
}
@ -36,6 +52,7 @@ future_error(node *n, char *filename)
PyErr_SetString(PyExc_SyntaxError,
"from __future__ imports must occur at the "
"beginning of the file");
PyErr_SyntaxLocation(filename, n->n_lineno);
/* XXX set filename and lineno */
}
@ -45,8 +62,10 @@ single_input: NEWLINE | simple_stmt | compound_stmt NEWLINE
file_input: (NEWLINE | stmt)* ENDMARKER
stmt: simple_stmt | compound_stmt
simple_stmt: small_stmt (';' small_stmt)* [';'] NEWLINE
small_stmt: expr_stmt | print_stmt | del_stmt | pass_stmt | flow_stmt | import_stmt | global_stmt | exec_stmt | assert_stmt
import_stmt: 'import' dotted_as_name (',' dotted_as_name)* | 'from' dotted_name 'import' ('*' | import_as_name (',' import_as_name)*)
small_stmt: expr_stmt | print_stmt | del_stmt | pass_stmt | flow_stmt
| import_stmt | global_stmt | exec_stmt | assert_stmt
import_stmt: 'import' dotted_as_name (',' dotted_as_name)*
| 'from' dotted_name 'import' ('*' | import_as_name (',' import_as_name)*)
import_as_name: NAME [NAME NAME]
dotted_as_name: dotted_name [NAME NAME]
dotted_name: NAME ('.' NAME)*
@ -64,11 +83,6 @@ future_parse(PyFutureFeatures *ff, node *n, char *filename)
int i, r;
loop:
/* fprintf(stderr, "future_parse(%d, %d, %s, %d)\n",
TYPE(n), NCH(n), (n == NULL) ? "NULL" : STR(n),
n->n_lineno);
*/
switch (TYPE(n)) {
case single_input:
@ -162,7 +176,7 @@ future_parse(PyFutureFeatures *ff, node *n, char *filename)
name = CHILD(n, 1);
if (strcmp(STR(CHILD(name, 0)), "__future__") != 0)
return 0;
if (future_check_features(ff, n) < 0)
if (future_check_features(ff, n, filename) < 0)
return -1;
ff->ff_last_lineno = n->n_lineno + 1;
return 1;