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SF patch 576101, by Oren Tirosh: alternative implementation of

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interning.  I modified Oren's patch significantly, but the basic idea
and most of the implementation is unchanged.  Interned strings created
with PyString_InternInPlace() are now mortal, and you must keep a
reference to the resulting string around; use the new function
PyString_InternImmortal() to create immortal interned strings.
This commit is contained in:
Guido van Rossum 2002-08-19 21:43:18 +00:00
parent d8dbf847b6
commit 45ec02aed1
7 changed files with 171 additions and 106 deletions
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6
Doc/lib/libfuncs.tex
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@ -518,8 +518,10 @@ def my_import(name):
be done by a pointer compare instead of a string compare. Normally,
the names used in Python programs are automatically interned, and
the dictionaries used to hold module, class or instance attributes
have interned keys. Interned strings are immortal (never get
garbage collected).
have interned keys. \versionchanged[Interned strings are not
immortal (like they used to be in Python 2.2 and before);
you must keep a reference to the return value of \function{intern()}
around to benefit from it]{2.3}
\end{funcdesc}
\begin{funcdesc}{isinstance}{object, classinfo}