lib/Tools/unsymbolize

- Moved rewriting functions to meta_simplifier.ML
- dest_abs now also takes an optional variable name as an argument
- beta_conversion takes additional flag as an argument. Fully reduces
the term if set to true

Some tuning:
- tuned fix_shyps in instantiate, implies_intr, implies_elim, reflexive,
transitive, beta_conversion, abstract_rule
- combination: chktypes derives types of f and t from type of == instead
of using fastype_of

New primitives:
- eta_conversion
- incr_indexes: increment indexes in theorems
- cterm_incr_indexes: increment indexes in cterms
- cterm_match, cterm_first_order_match
- rename_boundvars

#!/bin/bash
#
# $Id$
# Author: Markus Wenzel, TU Muenchen
# License: GPL (GNU GENERAL PUBLIC LICENSE)
#
# DESCRIPTION: remove unreadable symbol names from sources


## diagnostics

PRG=$(basename "$0")

function usage()
{
  echo
  echo "Usage: $PRG [FILES|DIRS...]"
  echo
  echo "  Recursively find .thy/.ML files, removing unreadable symbol names."
  echo "  Note: this is an ad-hoc script; there is no systematic way to replace"
  echo "  symbols independently of the inner syntax of a theory!"
  echo
  echo "  Renames old versions of FILES by appending \"~~\"."
  echo
  exit 1
}


## process command line

[ "$#" -eq 0 -o "$1" = "-?" ] && usage

SPECS="$@"; shift "$#"


## main

#set by configure
AUTO_PERL=perl

find $SPECS \( -name \*.ML -o -name \*.thy \) -print | \
  xargs "$AUTO_PERL" -w "$ISABELLE_HOME/lib/scripts/unsymbolize.pl"