alarsyo/spot
1
0
Fork 0
Code Issues Pull requests Projects Releases Wiki Activity

Trivially reduce 'a[*1]' to 'a'.

Browse source 
* src/ltlast/bunop.cc (bunop::instance): Here.
* src/ltlast/bunop.hh, doc/tl/tl.tex: Document it.
* src/ltltest/equals.test: Test it.
This commit is contained in:
Alexandre Duret-Lutz 2012-04-17 16:00:22 +02:00
parent abaf102746
commit a4353d3985
4 changed files with 13 additions and 5 deletions
Download patch file Download diff file Expand all files Collapse all files

4
src/ltlast/bunop.cc
View file

@ -211,6 +211,10 @@ namespace spot
return constant::empty_word_instance();
}
// - Exp[*1] = Exp
if (min == 1 && max == 1)
return child;
// - Exp[*i..j][*min..max] = Exp[*i(min)..j(max)]
// if i*(min+1)<=j(min)+1.
if (child->kind() == BUnOp)

1
src/ltlast/bunop.hh
View file

@ -51,6 +51,7 @@ namespace spot
/// - [*0][*min..max] = [*0]
/// - Exp[*0] = [*0]
/// - Exp[*i..j][*k..l] = Exp[*ik..jl] if i*(k+1)<=jk+1.
/// - Exp[*1] = Exp
///
/// These rewriting rules imply that it is not possible to build
/// an LTL formula object that is SYNTACTICALLY equal to one of

8
src/ltltest/equals.test
View file

@ -1,8 +1,9 @@
#! /bin/sh
# Copyright (C) 2009, 2010, 2011 Laboratoire de Recherche et Développement
# de l'Epita (LRDE).
# -*- coding: utf-8 -*-
# Copyright (C) 2009, 2010, 2011, 2012 Laboratoire de Recherche et
# Développement de l'Epita (LRDE).
# Copyright (C) 2003, 2004 Laboratoire d'Informatique de Paris 6 (LIP6),
# département Systèmes Répartis Coopératifs (SRC), Université Pierre
# département Systèmes Répartis Coopératifs (SRC), Université Pierre
# et Marie Curie.
#
# This file is part of Spot, a model checking library.
@ -160,6 +161,7 @@ run 0 ../equals '{a[*..3][*to2]}' '{a[*:6]}'
run 0 ../equals '{a[*..3][*2..$]}' '{a[*]}'
run 0 ../equals '{a[*..3][*2:]}' '{a[*:inf]}'
run 0 ../equals '{a[*1..]}' '{a[+]}'
run 0 ../equals '{a[*1]}' '{a}'
run 0 ../equals '{a[+][*1..3]}' '{a[+]}'
run 0 ../equals '{a[*1..3][+]}' '{a[+]}'
run 0 ../equals '{[*2][+]}' '{[*2][+]}'