pathname

(pathname pathspec)

The pathname the designator names: a pathname is returned unchanged, a string yields a fresh pathname carrying it as the namestring, and anything else signals. This is the canonical constructor the whole family funnels through -- #P"..." in source denotes the same value this builds at run time.

(pathname #P"d/notes.txt") is the argument itself; (pathnamep (pathname "x")) is T.

Backend support

All four backends -- one definition in rontolisp source, spliced into the program when it is referenced.