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digitalmars.D.bugs - [Issue 9797] New: to!int() cannot convert hexadecimal numbers

reply d-bugmail puremagic.com writes:
http://d.puremagic.com/issues/show_bug.cgi?id=9797

           Summary: to!int() cannot convert hexadecimal numbers
           Product: D
           Version: D2
          Platform: All
        OS/Version: All
            Status: NEW
          Severity: major
          Priority: P2
         Component: Phobos
        AssignedTo: nobody puremagic.com
        ReportedBy: kodlists-dlang yahoo.com



10:14:23 PDT ---
$ cat conv_bug.d
import std.conv;

void main()
{
        auto var = to!int("0x123");
}
$ rdmd conv_bug.d
std.conv.ConvException /usr/include/dmd/phobos/std/conv.d(1612): Unexpected 'x'
when converting from type string to type int

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Mar 23 2013
next sibling parent d-bugmail puremagic.com writes:
http://d.puremagic.com/issues/show_bug.cgi?id=9797


Andrej Mitrovic <andrej.mitrovich gmail.com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |andrej.mitrovich gmail.com



10:39:40 PDT ---
This might end up being rejected like Issue 7692. See comment
https://github.com/D-Programming-Language/phobos/pull/835#discussion_r1764414.

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prev sibling parent d-bugmail puremagic.com writes:
http://d.puremagic.com/issues/show_bug.cgi?id=9797




19:25:49 PDT ---


 This might end up being rejected like Issue 7692. See comment
 https://github.com/D-Programming-Language/phobos/pull/835#discussion_r1764414.


The reason given to close issue 7692 is wrong. In D a hexadecimal number is
prefixed with 0x. Not being able to recognize a valid D hexadecimal number is a
bug in to!int().

Below is what C's strtol() does and parse!int() should behave same.

value = strtol("0xyz", &leftover, 0);   // value == 0, leftover == "xyz"
value = strtol("0xyz", &leftover, 16);   // value == 0, leftover == "xyz"
value = strtol("0x0x", &leftover, 0);   // value == 0, leftover == "x"
value = strtol("0x0x", &leftover, 16);   // value == 0, leftover == "x"
value = strtol("0x0x", &leftover, 10);   // value == 0, leftover == "x0x"
value = strtol("abcd", &leftover, 0);   // value == 0, leftover == "abcd"
value = strtol("abcd", &leftover, 16);   // value == 0xabcd, leftover == ""

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Apr 15 2013