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Merged revisions 61952-61953 via svnmerge from

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svn+ssh://pythondev@svn.python.org/python/trunk

........
  r61952 | mark.dickinson | 2008-03-26 22:41:36 +0100 (Wed, 26 Mar 2008) | 2 lines

  Typo: "objects reference count" -> "object's reference count"
........
  r61953 | christian.heimes | 2008-03-26 23:01:37 +0100 (Wed, 26 Mar 2008) | 4 lines

  Patch #2477: Added from __future__ import unicode_literals

  The new PyParser_*Ex() functions are based on Neal's suggestion and initial patch. The new __future__ feature makes all '' and r'' unicode strings. b'' and br'' stay (byte) strings.
........
This commit is contained in:
Christian Heimes 2008-03-26 22:34:47 +00:00
parent 9edef04c95
commit 4d6ec85a02
11 changed files with 92 additions and 30 deletions
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2
Doc/c-api/structures.rst
View File

@ -20,7 +20,7 @@ definition of all other Python objects.
All object types are extensions of this type. This is a type which contains the
information Python needs to treat a pointer to an object as an object. In a
normal "release" build, it contains only the objects reference count and a
normal "release" build, it contains only the object's reference count and a
pointer to the corresponding type object. It corresponds to the fields defined
by the expansion of the ``PyObject_HEAD`` macro.

1
Include/code.h
View File

@ -49,6 +49,7 @@ typedef struct {
#define CO_FUTURE_ABSOLUTE_IMPORT 0x4000 /* do absolute imports by default */
#define CO_FUTURE_WITH_STATEMENT 0x8000
#define CO_FUTURE_PRINT_FUNCTION 0x10000
#define CO_FUTURE_UNICODE_LITERALS 0x20000
#endif
/* This should be defined if a future statement modifies the syntax.

1
Include/compile.h
View File

@ -25,6 +25,7 @@ typedef struct {
#define FUTURE_ABSOLUTE_IMPORT "absolute_import"
#define FUTURE_WITH_STATEMENT "with_statement"
#define FUTURE_PRINT_FUNCTION "print_function"
#define FUTURE_UNICODE_LITERALS "unicode_literals"
struct _mod; /* Declare the existence of this type */
PyAPI_FUNC(PyCodeObject *) PyAST_Compile(struct _mod *, const char *,

10
Include/parsetok.h
View File

@ -25,6 +25,8 @@ typedef struct {
#if 0
#define PyPARSE_WITH_IS_KEYWORD 0x0003
#define PyPARSE_PRINT_IS_FUNCTION 0x0004
#define PyPARSE_UNICODE_LITERALS 0x0008
#endif
PyAPI_FUNC(node *) PyParser_ParseString(const char *, grammar *, int,
@ -38,11 +40,19 @@ PyAPI_FUNC(node *) PyParser_ParseFileFlags(FILE *, const char *,
const char*, grammar *,
int, char *, char *,
perrdetail *, int);
PyAPI_FUNC(node *) PyParser_ParseFileFlagsEx(FILE *, const char *,
const char*, grammar *,
int, char *, char *,
perrdetail *, int *);
PyAPI_FUNC(node *) PyParser_ParseStringFlagsFilename(const char *,
const char *,
grammar *, int,
perrdetail *, int);
PyAPI_FUNC(node *) PyParser_ParseStringFlagsFilenameEx(const char *,
const char *,
grammar *, int,
perrdetail *, int *);
/* Note that he following function is defined in pythonrun.c not parsetok.c. */
PyAPI_FUNC(void) PyParser_SetError(perrdetail *);

6
Lib/__future__.py
View File

@ -54,6 +54,7 @@ all_feature_names = [
"absolute_import",
"with_statement",
"print_function",
"unicode_literals",
]
__all__ = ["all_feature_names"] + all_feature_names
@ -68,6 +69,7 @@ CO_FUTURE_DIVISION = 0x2000 # division
CO_FUTURE_ABSOLUTE_IMPORT = 0x4000 # perform absolute imports by default
CO_FUTURE_WITH_STATEMENT = 0x8000 # with statement
CO_FUTURE_PRINT_FUNCTION = 0x10000 # print function
CO_FUTURE_UNICODE_LITERALS = 0x20000 # unicode string literals
class _Feature:
def __init__(self, optionalRelease, mandatoryRelease, compiler_flag):
@ -120,3 +122,7 @@ with_statement = _Feature((2, 5, 0, "alpha", 1),
print_function = _Feature((2, 6, 0, "alpha", 2),
(3, 0, 0, "alpha", 0),
CO_FUTURE_PRINT_FUNCTION)
unicode_literals = _Feature((2, 6, 0, "alpha", 2),
(3, 0, 0, "alpha", 0),
CO_FUTURE_UNICODE_LITERALS)

16
Parser/parser.c
View File

@ -206,10 +206,18 @@ future_hack(parser_state *ps)
for (i = 0; i < NCH(ch); i += 2) {
cch = CHILD(ch, i);
if (NCH(cch) >= 1 && TYPE(CHILD(cch, 0)) == NAME &&
strcmp(STR(CHILD(cch, 0)), "with_statement") == 0) {
ps->p_flags |= CO_FUTURE_WITH_STATEMENT;
break;
if (NCH(cch) >= 1 && TYPE(CHILD(cch, 0)) == NAME) {
char *str_ch = STR(CHILD(cch, 0));
if (strcmp(str_ch, FUTURE_WITH_STATEMENT) == 0) {
ps->p_flags |= CO_FUTURE_WITH_STATEMENT;
break;
} else if (strcmp(str_ch, FUTURE_PRINT_FUNCTION) == 0) {
ps->p_flags |= CO_FUTURE_PRINT_FUNCTION;
break;
} else if (strcmp(str_ch, FUTURE_UNICODE_LITERALS) == 0) {
ps->p_flags |= CO_FUTURE_UNICODE_LITERALS;
break;
}
}
}
}

34
Parser/parsetok.c
View File

@ -14,7 +14,7 @@ int Py_TabcheckFlag;
/* Forward */
static node *parsetok(struct tok_state *, grammar *, int, perrdetail *, int);
static node *parsetok(struct tok_state *, grammar *, int, perrdetail *, int *);
static void initerr(perrdetail *err_ret, const char* filename);
/* Parse input coming from a string. Return error code, print some errors. */
@ -36,6 +36,16 @@ node *
PyParser_ParseStringFlagsFilename(const char *s, const char *filename,
grammar *g, int start,
perrdetail *err_ret, int flags)
{
int iflags = flags;
return PyParser_ParseStringFlagsFilenameEx(s, filename, g, start,
err_ret, &iflags);
}
node *
PyParser_ParseStringFlagsFilenameEx(const char *s, const char *filename,
grammar *g, int start,
perrdetail *err_ret, int *flags)
{
struct tok_state *tok;
@ -64,9 +74,19 @@ PyParser_ParseFile(FILE *fp, const char *filename, grammar *g, int start,
}
node *
PyParser_ParseFileFlags(FILE *fp, const char *filename, const char* enc,
PyParser_ParseFileFlags(FILE *fp, const char *filename, const char *enc,
grammar *g, int start,
char *ps1, char *ps2, perrdetail *err_ret, int flags)
{
int iflags = flags;
return PyParser_ParseFileFlagsEx(fp, filename, enc, g, start, ps1,
ps2, err_ret, &iflags);
}
node *
PyParser_ParseFileFlagsEx(FILE *fp, const char *filename,
const char *enc, grammar *g, int start,
char *ps1, char *ps2, perrdetail *err_ret, int *flags)
{
struct tok_state *tok;
@ -104,7 +124,7 @@ warn(const char *msg, const char *filename, int lineno)
static node *
parsetok(struct tok_state *tok, grammar *g, int start, perrdetail *err_ret,
int flags)
int *flags)
{
parser_state *ps;
node *n;
@ -117,7 +137,7 @@ parsetok(struct tok_state *tok, grammar *g, int start, perrdetail *err_ret,
return NULL;
}
#ifdef PY_PARSER_REQUIRES_FUTURE_KEYWORD
if (flags & PyPARSE_WITH_IS_KEYWORD)
if (*flags & PyPARSE_WITH_IS_KEYWORD)
ps->p_flags |= CO_FUTURE_WITH_STATEMENT;
#endif
@ -141,7 +161,7 @@ parsetok(struct tok_state *tok, grammar *g, int start, perrdetail *err_ret,
except if a certain flag is given --
codeop.py uses this. */
if (tok->indent &&
!(flags & PyPARSE_DONT_IMPLY_DEDENT))
!(*flags & PyPARSE_DONT_IMPLY_DEDENT))
{
tok->pendin = -tok->indent;
tok->indent = 0;
@ -205,7 +225,9 @@ parsetok(struct tok_state *tok, grammar *g, int start, perrdetail *err_ret,
}
else
n = NULL;
#ifdef PY_PARSER_REQUIRES_FUTURE_KEYWORD
*flags = ps->p_flags;
#endif
PyParser_Delete(ps);
if (n == NULL) {

24
Python/ast.c
View File

@ -35,7 +35,7 @@ static stmt_ty ast_for_classdef(struct compiling *, const node *, asdl_seq *);
static expr_ty ast_for_call(struct compiling *, const node *, expr_ty);
static PyObject *parsenumber(const char *);
static PyObject *parsestr(const node *n, const char *encoding, int *bytesmode);
static PyObject *parsestr(struct compiling *, const node *n, int *bytesmode);
static PyObject *parsestrplus(struct compiling *, const node *n,
int *bytesmode);
@ -3191,14 +3191,13 @@ decode_unicode(const char *s, size_t len, int rawmode, const char *encoding)
* parsestr parses it, and returns the decoded Python string object.
*/
static PyObject *
parsestr(const node *n, const char *encoding, int *bytesmode)
parsestr(struct compiling *c, const node *n, int *bytesmode)
{
size_t len;
const char *s = STR(n);
int quote = Py_CHARMASK(*s);
int rawmode = 0;
int need_encoding;
if (isalpha(quote)) {
if (quote == 'b' || quote == 'B') {
quote = *++s;
@ -3233,7 +3232,7 @@ parsestr(const node *n, const char *encoding, int *bytesmode)
}
}
if (!*bytesmode && !rawmode) {
return decode_unicode(s, len, rawmode, encoding);
return decode_unicode(s, len, rawmode, c->c_encoding);
}
if (*bytesmode) {
/* Disallow non-ascii characters (but not escapes) */
@ -3246,28 +3245,27 @@ parsestr(const node *n, const char *encoding, int *bytesmode)
}
}
}
need_encoding = (!*bytesmode && encoding != NULL &&
strcmp(encoding, "utf-8") != 0 &&
strcmp(encoding, "iso-8859-1") != 0);
need_encoding = (!*bytesmode && c->c_encoding != NULL &&
strcmp(c->c_encoding, "utf-8") != 0 &&
strcmp(c->c_encoding, "iso-8859-1") != 0);
if (rawmode || strchr(s, '\\') == NULL) {
if (need_encoding) {
PyObject *v, *u = PyUnicode_DecodeUTF8(s, len, NULL);
if (u == NULL || !*bytesmode)
return u;
v = PyUnicode_AsEncodedString(u, encoding, NULL);
v = PyUnicode_AsEncodedString(u, c->c_encoding, NULL);
Py_DECREF(u);
return v;
} else if (*bytesmode) {
return PyString_FromStringAndSize(s, len);
} else if (strcmp(encoding, "utf-8") == 0) {
} else if (strcmp(c->c_encoding, "utf-8") == 0) {
return PyUnicode_FromStringAndSize(s, len);
} else {
return PyUnicode_DecodeLatin1(s, len, NULL);
}
}
return PyString_DecodeEscape(s, len, NULL, 1,
need_encoding ? encoding : NULL);
need_encoding ? c->c_encoding : NULL);
}
/* Build a Python string object out of a STRING+ atom. This takes care of
@ -3280,13 +3278,13 @@ parsestrplus(struct compiling *c, const node *n, int *bytesmode)
PyObject *v;
int i;
REQ(CHILD(n, 0), STRING);
v = parsestr(CHILD(n, 0), c->c_encoding, bytesmode);
v = parsestr(c, CHILD(n, 0), bytesmode);
if (v != NULL) {
/* String literal concatenation */
for (i = 1; i < NCH(n); i++) {
PyObject *s;
int subbm = 0;
s = parsestr(CHILD(n, i), c->c_encoding, &subbm);
s = parsestr(c, CHILD(n, i), &subbm);
if (s == NULL)
goto onError;
if (*bytesmode != subbm) {

2
Python/future.c
View File

@ -35,6 +35,8 @@ future_check_features(PyFutureFeatures *ff, stmt_ty s, const char *filename)
continue;
} else if (strcmp(feature, FUTURE_PRINT_FUNCTION) == 0) {
continue;
} else if (strcmp(feature, FUTURE_UNICODE_LITERALS) == 0) {
continue;
} else if (strcmp(feature, "braces") == 0) {
PyErr_SetString(PyExc_SyntaxError,
"not a chance");

3
Python/import.c
View File

@ -821,12 +821,13 @@ parse_source_module(const char *pathname, FILE *fp)
{
PyCodeObject *co = NULL;
mod_ty mod;
PyCompilerFlags flags;
PyArena *arena = PyArena_New();
if (arena == NULL)
return NULL;
mod = PyParser_ASTFromFile(fp, pathname, NULL,
Py_file_input, 0, 0, 0,
Py_file_input, 0, 0, &flags,
NULL, arena);
if (mod) {
co = PyAST_Compile(mod, pathname, NULL, arena);

23
Python/pythonrun.c
View File

@ -1563,11 +1563,12 @@ Py_SymtableString(const char *str, const char *filename, int start)
{
struct symtable *st;
mod_ty mod;
PyCompilerFlags flags;
PyArena *arena = PyArena_New();
if (arena == NULL)
return NULL;
mod = PyParser_ASTFromString(str, filename, start, NULL, arena);
mod = PyParser_ASTFromString(str, filename, start, &flags, arena);
if (mod == NULL) {
PyArena_Free(arena);
return NULL;
@ -1584,10 +1585,16 @@ PyParser_ASTFromString(const char *s, const char *filename, int start,
{
mod_ty mod;
perrdetail err;
node *n = PyParser_ParseStringFlagsFilename(s, filename,
int iflags;
iflags = PARSER_FLAGS(flags);
node *n = PyParser_ParseStringFlagsFilenameEx(s, filename,
&_PyParser_Grammar, start, &err,
PARSER_FLAGS(flags));
&iflags);
if (n) {
if (flags) {
flags->cf_flags |= iflags & PyCF_MASK;
}
mod = PyAST_FromNode(n, flags, filename, arena);
PyNode_Free(n);
return mod;
@ -1606,10 +1613,16 @@ PyParser_ASTFromFile(FILE *fp, const char *filename, const char* enc,
{
mod_ty mod;
perrdetail err;
node *n = PyParser_ParseFileFlags(fp, filename, enc,
int iflags;
iflags = PARSER_FLAGS(flags);
node *n = PyParser_ParseFileFlagsEx(fp, filename, enc,
&_PyParser_Grammar,
start, ps1, ps2, &err, PARSER_FLAGS(flags));
start, ps1, ps2, &err, &iflags);
if (n) {
if (flags) {
flags->cf_flags |= iflags & PyCF_MASK;
}
mod = PyAST_FromNode(n, flags, filename, arena);
PyNode_Free(n);
return mod;