Skip to content

Redefine __traits(getPointerBitmap, S) for types without pointers to return size only #4353

New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

Open
JohanEngelen wants to merge 1 commit into
base: master
Choose a base branch
from
Open

Redefine __traits(getPointerBitmap, S) for types without pointers to return size only #4353

Changes from all commits
Commits
Show all changes
1 commit
Select commit
File filter

Filter by extension

Filter by extension
Conversations
Failed to load comments.
Loading
Jump to
Jump to file
Failed to load files.
Loading
Diff view
Diff view
8 changes: 7 additions & 1 deletion spec/traits.dd
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -560,7 +560,7 @@ $(H3 $(GNAME getPointerBitmap))
)
$(P The first element of the array is the size of the type (for classes it is
the $(GLINK classInstanceSize)).)
$(P The following elements describe the locations of GC managed pointers within the
$(P If the type contains pointers, then the following elements describe the locations of GC managed pointers within the
memory occupied by an instance of the type.
For type T, there are $(D T.sizeof / size_t.sizeof) possible pointers represented
by the bits of the array values.)
Expand Down Expand Up @@ -588,8 +588,14 @@ void main()
void delegate () dg; // { context, func }
}

static struct S_no_pointers
{
int[200000000] x;
}

static assert (__traits(getPointerBitmap, C) == [6*size_t.sizeof, 0b010100]);
static assert (__traits(getPointerBitmap, S) == [7*size_t.sizeof, 0b0110110]);
static assert (__traits(getPointerBitmap, S_no_pointers) == [200000000*int.sizeof]);
}
---
)
Expand Down