line_name
unwindLib.line_name : (term -> string)
Computes the line name of an equation.
line_name "!y1 ... ym. f x1 ... xn = t" returns the string `f`.
line_name "!y1 ... ym. f x1 ... xn = t"
`f`
Fails if the argument term is not of the specified form.
unwindLib.line_var