http://d.puremagic.com/issues/show_bug.cgi?id=4122

           Summary: More handy BigInt.toString()
           Product: D
           Version: future
          Platform: All
        OS/Version: All
            Status: NEW
          Severity: enhancement
          Priority: P2
         Component: Phobos
        AssignedTo: nobody@puremagic.com
        ReportedBy: bearophile_hugs@eml.cc


--- Comment #0 from bearophile_hugs@eml.cc 2010-04-24 16:09:02 PDT ---
The toString() of BigInt is not handy to print bigintegers during debugging. I have had to create a function like:

const(char)[] bigIntRepr(BigInt i) {
    const(char)[] result;
    i.toString((const(char)[] s){ result = s; }, "d");
    return result;
}


Note that this doesn't work (Access violation, I don't know why):

const(char)[] bigIntRepr(BigInt i) {
    const(char)[] result;
    i.toString((const(char)[] s){ result = s; }, null);
    return result;
}


My suggestion is to change the signature of BigInt.toString() from this:

void toString(void delegate(const (char)[]) sink, string formatString) const {


To something like this:

string toString(void delegate(string) sink=null, string formatString="d") const
{

And make it return a string filled with the decimal representation when sink is null; and to return an empty string when sink!=null.

------------------------

Eventually the signature can even become:

string toString(void delegate(string) sink=null, string formatString="d",
string thousands="") const {

So if thousands="_" the number gets represented as:

"100_000_000_000"

But this is less important.

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--- Comment #1 from bearophile_hugs@eml.cc 2010-11-19 10:06:24 PST ---
See:
http://www.dsource.org/projects/phobos/changeset/2183

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Don <clugdbug@yahoo.com.au> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |RESOLVED
                 CC|                            |clugdbug@yahoo.com.au
         Resolution|                            |FIXED


--- Comment #2 from Don <clugdbug@yahoo.com.au> 2011-03-18 23:33:50 PDT ---
Marking this as fixed, since you can just use writefln() in 2.051 and later.
(as added in the changeset).

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