[Issue 2101] CTFE: Please may I use mutable arrays at compile time?

[d-bugmail at puremagic.com]

http://d.puremagic.com/issues/show_bug.cgi?id=2101


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

           What    |Removed                     |Added
----------------------------------------------------------------------------
           Keywords|                            |patch


--- Comment #3 from Don <clugdbug at yahoo.com.au> 2010-01-10 14:11:14 PST ---
Janice's first case has compiled for quite a long time now. The third case,
involving 'new', is very straightforward.  The final case (changing length) is
doubtful whether it is a good idea. I think with implementing 'new', we can
close this bug.

PATCH to allow dynamic array creation with new. Insert this code into
interpret.c, around line 2690. Also add the declaration for it in NewExp in
expression.h. Also need to change the spec to remove the restriction on using
'new'.

------------
Expression *NewExp::interpret(InterState *istate)
{
#if LOG
    printf("NewExp::interpret() %s\n", toChars());
#endif
    if (newtype->ty == Tarray && arguments && arguments->dim == 1)
    {
    Expression *lenExpr = ((Expression
*)(arguments->data[0]))->interpret(istate);
    if (lenExpr == EXP_CANT_INTERPRET)
        return EXP_CANT_INTERPRET;
    return createBlockDuplicatedArrayLiteral(newtype,
        newtype->defaultInitLiteral(), lenExpr->toInteger());
    }
    error("Cannot interpret %s at compile time", toChars());
    return EXP_CANT_INTERPRET;
}

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