[debbugs-tracker] bug#6891: closed (`string-to-number' doesn't recognize `#'' read syntax)

[GNU bug Tracking System]

Your message dated Wed, 26 Jun 2019 18:15:27 +0300
with message-id <address@hidden>
and subject line Re: bug#6891: `string-to-number' doesn't recognize `#'' read 
syntax
has caused the debbugs.gnu.org bug report #6891,
regarding `string-to-number' doesn't recognize `#'' read syntax
to be marked as done.

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6891: http://debbugs.gnu.org/cgi/bugreport.cgi?bug=6891
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> --- Begin Message ---
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>
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> Subject: 
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> `string-to-number' doesn't recognize `#'' read syntax
>
>
>
>
> Date: 
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> Fri, 20 Aug 2010 20:01:06 -0400
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>
>
>
> `string-to-number' takes an optional arg BASE but doesn't recognize lisp `#'
> read syntax for binary, octal, hex, and radix, e.g.  `#o', `#b', `#x', and
> `#<RADIX>r'. It should, these _are_ the respective read syntax for BASE.
> For good measure it should also recognize the string output from
> `format's `#' flag for octal and hex e.g `0x' for hex and `0' for octal.
>
> The proposed behaviour should not pose a lisp dialect compatiblility problem as
> Emacs lisp does not attempt to follow the Common Lisp spec, does not maintain a
> duplicate for CL's `parse-integer' procedure and does not take a bounding START
> END arg, but _does_ parse floats so it shouldn't be restricted by that specs
> constraints w/re the `#' radix read syntax e.g:
>
> ,----
> | `parse-integer' does not recognize the syntactic radix-specifier
> | prefixes `#O', `#B', `#X', and `#nR', nor does it recognize a trailing
> | decimal point.
> `----
>
> Besides, `string-to-number' already has a BASE argument, the C code already
> strips whitespace, discards "junk", and exhibits a willingness to interpolate
> sign in sometimes odd ways, so a little more DWIM can't hurt.
>
> Current `string-to-number' DWIMness:
> string-to-number "   -3777777777" 8) ;=> 536870911
> (string-to-number "   -3777777777.007" 8) ;=> 536870911
> (string-to-number "   -3777777777mmm#" 8) ;=> 536870911
> (string-to-number "+   -3777777777mmm#" 8) ;=> 0
>
> Following illustrates the additioanl DWIMing desired:
>
> #o
> (string-to-number "#o3777777777" 8) ;=> 536870911
>
> #b
> (string-to-number "#b11111111111111111111111111111" 2) ;=> 536870911
>
> #x
> (string-to-number "#x1fffffff" 16) ;=> 536870911
>
> #<RDX>r
> (string-to-number "#12r12B969227" 12) ;=> 536870911
>
> 0x
> (string-to-number "0x1fffffff" 16) ;=> 536870911
>
> 0
> (string-to-number "03777777777" 8) ;=> 536870911
>
>
> --
> /s_P\
>
>
>
> --- End Message ---
> --- Begin Message ---
>
>
>
> Subject: 
>
> Re: bug#6891: `string-to-number' doesn't recognize `#'' read syntax
>
>
>
>
> Date: 
>
> Wed, 26 Jun 2019 18:15:27 +0300
>
>
>
>
> > From: Lars Ingebrigtsen <address@hidden>
> > Date: Wed, 26 Jun 2019 13:44:41 +0200
> > Cc: address@hidden
> > 
> > Stefan Kangas <address@hidden> writes:
> > 
> > > This bug was tagged as wontfix three years ago.
> > >
> > > Is it desirable to close it too?
> > 
> > I think so.
>
> Agreed and done.
>
> Thanks.
>
>
> --- End Message ---