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Refactor future feature handling 

Replace individual slots in PyFutureFeatures with a single bitmask
with one field per feature.  The flags for this bitmask are the same
as the flags used in the co_flags slot of a code object.

    XXX This means we waste several bits, because they are used
    for co_flags but have no meaning for future statements.  Don't
    think this is an issue.

Remove the NESTED_SCOPES_DEFAULT define and others.  Not sure what
they were for anyway.

Remove all the PyCF_xxx flags, but define PyCF_MASK in terms of the
CO_xxx flags that are relevant for this release.

Change definition of PyCompilerFlags so that cf_flags matches
co_flags.
This commit is contained in:
Jeremy Hylton 2001-08-10 21:38:04 +00:00
parent 11ee90289c
commit fdd12f66bb
2 changed files with 3 additions and 16 deletions
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10
Include/compile.h
View File

@ -41,7 +41,6 @@ typedef struct {
effect, this passes on the "from __future__ import generators" state
in effect when the code block was compiled. */
#define CO_GENERATOR_ALLOWED 0x1000
/* XXX Ditto for future division */
#define CO_FUTURE_DIVISION 0x2000
extern DL_IMPORT(PyTypeObject) PyCode_Type;
@ -64,22 +63,15 @@ DL_IMPORT(int) PyCode_Addr2Line(PyCodeObject *, int);
typedef struct {
int ff_found_docstring;
int ff_last_lineno;
int ff_nested_scopes;
int ff_generators;
int ff_division;
int ff_features;
} PyFutureFeatures;
DL_IMPORT(PyFutureFeatures *) PyNode_Future(struct _node *, char *);
DL_IMPORT(PyCodeObject *) PyNode_CompileFlags(struct _node *, char *,
PyCompilerFlags *);
#define NESTED_SCOPES_DEFAULT 1
#define FUTURE_NESTED_SCOPES "nested_scopes"
#define GENERATORS_DEFAULT 0
#define FUTURE_GENERATORS "generators"
#define DIVISION_DEFAULT 0
#define FUTURE_DIVISION "division"
/* for internal use only */

9
Include/pythonrun.h
View File

@ -7,14 +7,9 @@
extern "C" {
#endif
/* These flags are named after the __future__ statements that introduced
them. May not remain true for later additions, so fiddle this comment
accordingly then. */
#define PyCF_NESTED_SCOPES (0x00000001UL)
#define PyCF_GENERATORS (0x00000002UL)
#define PyCF_DIVISION (0x00000004UL)
#define PyCF_MASK (CO_GENERATOR_ALLOWED | CO_FUTURE_DIVISION)
typedef struct {
unsigned long cf_flags; /* bitmask of PyCF_xxx flags */
int cf_flags; /* bitmask of CO_xxx flags relevant to future */
} PyCompilerFlags;
DL_IMPORT(void) Py_SetProgramName(char *);