elisp function that returns the current file being interpreted

Isn't there a function that returns the current file being interpreted? That is, if I call it in foo.el, it will return "foo.el"? The use case is in startup files. No, I don't want u开发者_开发问答ser-init-file, but it is analogous to that.

Surely this has been asked before, but I cannot find the answer anywhere, huh...

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Ah! It's called load-file-name.

I had already been using it in one of my init files...