Iterators phase 1. This comprises:
new slot tp_iter in type object, plus new flag Py_TPFLAGS_HAVE_ITER
new C API PyObject_GetIter(), calls tp_iter
new builtin iter(), with two forms: iter(obj), and iter(function, sentinel)
new internal object types iterobject and calliterobject
new exception StopIteration
new opcodes for "for" loops, GET_ITER and FOR_ITER (also supported by dis.py)
new magic number for .pyc files
new special method for instances: __iter__() returns an iterator
iteration over dictionaries: "for x in dict" iterates over the keys
iteration over files: "for x in file" iterates over lines
TODO:
documentation
test suite
decide whether to use a different way to spell iter(function, sentinal)
decide whether "for key in dict" is a good idea
use iterators in map/filter/reduce, min/max, and elsewhere (in/not in?)
speed tuning (make next() a slot tp_next???)
diff --git a/Makefile.pre.in b/Makefile.pre.in
index f2f3336..103a36b 100644
--- a/Makefile.pre.in
+++ b/Makefile.pre.in
@@ -238,6 +238,7 @@
Objects/frameobject.o \
Objects/funcobject.o \
Objects/intobject.o \
+ Objects/iterobject.o \
Objects/listobject.o \
Objects/longobject.o \
Objects/dictobject.o \
@@ -433,6 +434,7 @@
Include/bufferobject.h \
Include/tupleobject.h \
Include/listobject.h \
+ Include/iterobject.h \
Include/dictobject.h \
Include/methodobject.h \
Include/moduleobject.h \