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Fixing bug

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[#448679] Left to right

* Python/compile.c
  (com_dictmaker): Reordered evaluation of dictionaries to follow strict
  LTR evaluation.

* Lib/compiler/pycodegen.py
  (CodeGenerator.visitDict): Reordered evaluation of dictionaries to
  follow strict LTR evaluation.

* Doc/ref/ref5.tex
  Documented the general LTR evaluation order idea.

* Misc/NEWS
  Documented change in evaluation order of dictionaries.
This commit is contained in:
Gustavo Niemeyer 2002-12-16 13:54:02 +00:00
parent c389ec8d55
commit 78429a6aa6
4 changed files with 26 additions and 4 deletions
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18
Doc/ref/ref5.tex
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@ -1026,6 +1026,24 @@ tuple, but rather yields the value of that expression.
\code{()}.)
\indexii{trailing}{comma}
\section{Evaluation order\label{evalorder}}
\indexii{evaluation}{order}
Python evaluates expressions from left to right. Notice that while
evaluating an assignment, the right-hand side is evaluated before
the left-hand side.
In the following lines, expressions will be evaluated in the
arithmetic order of their suffixes:
\begin{verbatim}
expr1, expr2, expr3, expr4
(expr1, expr2, expr3, expr4)
{expr1: expr2, expr3: expr4}
expr1 + expr2 * (expr3 - expr4)
func(expr1, expr2, *expr3, **expr4)
expr3, expr4 = expr1, expr2
\end{verbatim}
\section{Summary\label{summary}}