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SF patch #455966: Allow leading 0 in float/imag literals.

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Consequences for Jython still unknown (but raised on Jython-Dev).
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Tim Peters 2001-08-30 20:51:59 +00:00
parent 21922aa939
commit d507dab91f
5 changed files with 84 additions and 15 deletions
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14
Doc/ref/ref2.tex
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@ -517,26 +517,26 @@ definitions:
\production{pointfloat}
{[\token{intpart}] \token{fraction} | \token{intpart} "."}
\production{exponentfloat}
{(\token{nonzerodigit} \token{digit}* | \token{pointfloat})
{(\token{intpart} | \token{pointfloat})
\token{exponent}}
\production{intpart}
{\token{nonzerodigit} \token{digit}* | "0"}
{\token{digit}+}
\production{fraction}
{"." \token{digit}+}
\production{exponent}
{("e" | "E") ["+" | "-"] \token{digit}+}
\end{productionlist}
Note that the integer part of a floating point number cannot look like
an octal integer, though the exponent may look like an octal literal
but will always be interpreted using radix 10. For example,
\samp{1e010} is legal, while \samp{07.1} is a syntax error.
Note that the integer and exponent parts of floating point numbers
can look like octal integers, but are interpreted using radix 10. For
example, \samp{077e010} is legal, and denotes the same number
as \samp{77e10}.
The allowed range of floating point literals is
implementation-dependent.
Some examples of floating point literals:
\begin{verbatim}
3.14 10. .001 1e100 3.14e-10
3.14 10. .001 1e100 3.14e-10 0e0
\end{verbatim}
Note that numeric literals do not include a sign; a phrase like