[Issue 3022] New: scope x = new Foo; does not allocate on stack if Foo has allocator

d-bugmail at puremagic.com d-bugmail at puremagic.com
Sat May 23 08:53:20 PDT 2009


http://d.puremagic.com/issues/show_bug.cgi?id=3022

           Summary: scope x = new Foo; does not allocate on stack if Foo
                    has allocator
           Product: D
           Version: 1.044
          Platform: PC
        OS/Version: All
            Status: NEW
          Keywords: patch, wrong-code
          Severity: normal
          Priority: P2
         Component: DMD
        AssignedTo: bugzilla at digitalmars.com
        ReportedBy: leo.dahlmann at gmail.com


Created an attachment (id=379)
 --> (http://d.puremagic.com/issues/attachment.cgi?id=379)
Patch to fix bug

extern(C) int printf(char*, ...);

class Foo
{
    new(size_t)
    {
        printf("Foo.new\n");
        return null;
    }
}

void main()
{
    scope x = new Foo;
}

Outputs "Foo.new" at runtime, even though the spec says that objects having
custom allocators will be allocated on the stack if they are called without
arguments to new.

This seems to be caused by dmd automatically prepending the class size to new's
arguments list, so it always has at least one argument.

Attached is a patch to fix this.

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