inst_word_lengths : term -> term
STRUCTURE
wordsLib
SYNOPSIS
Guess and instantiate word index type variables in a term.
DESCRIPTION
The function inst_word_lengths tries to instantiate type variables that correspond with the return type of word_concat and word_extract.
EXAMPLE
- load "wordsLib";
...
- wordsLib.inst_word_lengths ``(7 >< 5) a @@ (4 >< 0) a``;
<<HOL message: inventing new type variable names: 'a, 'b, 'c, 'd>>
<<HOL message: assigning word length(s): 'a <- 3, 'b <- 5 and 'c <- 8>>
> val it =
    ``(((7 :num) >< (5 :num)) (a :bool['d]) :bool[3]) @@
      (((4 :num) >< (0 :num)) a :bool[5])`` : term
- type_of it;
> val it = ``:bool[8]`` : hol_type
COMMENTS
The function guess_lengths adds inst_word_lengths as a post-processing stage to the term parser.
SEEALSO
guess_lengths, notify_on_word_length_guess
HOL  Kananaskis-14