[ptman]

What if I want both TreeNode<float64> and TreeNode<rune>?

[riobard]

Easy. You copy the original file twice and put them in two different sub directories, say treef64 and treerune.

[osteele]

Not copy – symbolic link. Then there’s just the one source file.

Not that I would want this in my project. But as a hack, it’s even better than it first sounds.