[Issue 4491] Assigning large const value to ulong type results in "signed integer overflow"

[via Digitalmars-d-bugs]

https://issues.dlang.org/show_bug.cgi?id=4491

Andrei Alexandrescu  changed:

   What|Removed |Added

Version|D1 & D2 |D2

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[Issue 4491] Assigning large const value to ulong type results in "signed integer overflow"

[d-bugmail]

https://d.puremagic.com/issues/show_bug.cgi?id=4491


Iain Buclaw  changed:

   What|Removed |Added

 Status|NEW |RESOLVED
 CC||ibuc...@ubuntu.com
 Resolution||WONTFIX


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[Issue 4491] Assigning large const value to ulong type results in "signed integer overflow"

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http://d.puremagic.com/issues/show_bug.cgi?id=4491



--- Comment #3 from Iain Buclaw  2010-07-22 07:48:45 PDT ---
(In reply to comment #1)
> You need to add an 'L' suffix when it's larger than int.max, and a 'U' suffix
> when it's unsigned.
> 
> import std.stdio;
> void main()
> {
> ulong t = 18446744073709551615UL;
> printf("%llu\n", t);
> }
> 
> The error message should make this clearer. Marking as a 'diagnostic' bug.

I suppose that makes sense once you know. Though it seems that it should more
like syntactical sugar to me, rather than a mandatory marking.

For example, "1e6" gets translated to 1_000_000.

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[Issue 4491] Assigning large const value to ulong type results in "signed integer overflow"

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bearophile_h...@eml.cc changed:

   What|Removed |Added

 CC||bearophile_h...@eml.cc


--- Comment #2 from bearophile_h...@eml.cc 2010-07-21 14:51:27 PDT ---
What's bad in the compiler/language accepting a line like:

ulong t = 18446744073709551615;

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[Issue 4491] Assigning large const value to ulong type results in "signed integer overflow"

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Don  changed:

   What|Removed |Added

   Keywords||diagnostic
 CC||clugd...@yahoo.com.au


--- Comment #1 from Don  2010-07-21 14:32:06 PDT ---
You need to add an 'L' suffix when it's larger than int.max, and a 'U' suffix
when it's unsigned.

import std.stdio;
void main()
{
ulong t = 18446744073709551615UL;
printf("%llu\n", t);
}

The error message should make this clearer. Marking as a 'diagnostic' bug.

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