inst : hol_type subst -> term -> term
inst [{redex_1, residue_1},...,{redex_n, residue_n}] tmwhere each `redex' is a hol_type variables, and each `residue' is a hol_type and tm a term to be type-instantiated. This call will replace each occurrence of a redex in tm by its associated residue. Replacement is done in parallel, i.e., once a redex has been replaced by its residue, at some place in the term, that residue at that place will not itself be replaced in the current call. Bound term variables may be renamed in order to preserve the term structure.
- show_types := true; > val it = () : unit - let val tm = Term`(x:'a) = (x:'a)` in inst [{redex = alpha, residue = Type`:num`}] tm end; > val it = `(x :num) = x` : term - try (inst [{redex = bool, residue = Type`:num`}]) (Term`x:bool`); > val it = `(x :bool)` : term - let val x1 = Term`x:bool` val x2 = Term`x:'a` in inst [alpha |-> bool] (mk_abs(x1,x2)) end; > val it = `\(x' :bool). (x :bool)` : term