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Fix trivial rules for b₁:b₂ and b&f.

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* src/ltlast/multop.cc (instance): Here.
* src/ltlast/multop.hh, doc/tl/tl.tex: Adjust documentation.
* src/ltltest/equals.test: Adjust test cases.
This commit is contained in:
Alexandre Duret-Lutz 2012-04-17 18:33:39 +02:00
parent a4353d3985
commit 866384b423
4 changed files with 38 additions and 33 deletions
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54
src/ltlast/multop.cc
View file

@ -196,9 +196,9 @@ namespace spot
// pointers that we must ignore.
if ((*i) == 0)
{
// FIXME: We should replace the pointer by the
// first non-null value at the end of the array
// instead of calling erase.
// FIXME: For commutative operators we should replace
// the pointer by the first non-null value at the end
// of the array instead of calling erase.
i = v->erase(i);
continue;
}
@ -271,9 +271,12 @@ namespace spot
++i;
}
}
// - AndNLM(Exps1...,Bool1,Exps2...,Bool2,Exp3...) =
// AndNLM(Exps1...,Exps2...,Exp3...,And(Bool1,Bool2))
v->push_back(instance(And, b));
// - AndNLM(Exps1...,Bool1,Exps2...,Bool2,Exps3...) =
// AndNLM(Exps1...,Exps2...,Exps3...,And(Bool1,Bool2))
if (!b->empty())
v->push_back(instance(And, b));
else
delete b;
}
break;
case Or:
@ -297,38 +300,39 @@ namespace spot
abs2 = constant::empty_word_instance();
weak_abs = 0;
// Make a first pass to gather Boolean formulae.
// Make a first pass to group adjacent Boolean formulae.
// - Fusion(Exps1...,BoolExp1...BoolExpN,Exps2,Exps3...) =
// Fusion(Exps1...,AndNLM(And(BoolExp1...BoolExpN),Exps2),Exps3...)
// Fusion(Exps1...,And(BoolExp1...BoolExpN),Exps2,Exps3...)
{
vec* b = 0;
vec::iterator i = v->begin();
while (i != v->end())
{
if ((*i)->is_boolean())
{
if (!b)
b = new vec;
b->push_back(*i);
i = v->erase(i);
vec::iterator first = i;
++i;
if (i == v->end())
break;
if (!(*i)->is_boolean())
{
++i;
continue;
}
do
++i;
while (i != v->end() && (*i)->is_boolean());
// We have at least two adjacent Boolean formulae.
// Replace the first one by the conjunction of all.
vec* b = new vec;
b->insert(b->begin(), first, i);
i = v->erase(first + 1, i);
*first = instance(And, b);
}
else
{
if (b)
{
// We have found a non-Boolean Exp. "AndNLM" it
// with all the previous Boolean formulae.
*i = instance(AndNLM, instance(And, b), *i);
b = 0;
}
++i;
}
}
if (b)
{
// Group all trailing Boolean formulae.
v->push_back(instance(And, b));
}
}
break;

6
src/ltlast/multop.hh
View file

@ -90,8 +90,8 @@ namespace spot
/// - AndNLM(Exps1...,0,Exps2...) = 0
/// - AndNLM(Exps1...,[*0],Exps2...) = AndNLM(Exps1...,Exps2...)
/// - AndNLM(Exp) = Exp
/// - AndNLM(Exps1...,BoolExp1,Exps2...,BoolExp2,Exp3...) =
/// AndNLM(Exps1...,Exps2...,Exp3...,And(BoolExp1,BoolExp2))
/// - AndNLM(Exps1...,BoolExp1,Exps2...,BoolExp2,Exps3...) =
/// AndNLM(Exps1...,Exps2...,Exps3...,And(BoolExp1,BoolExp2))
/// - Or(Exps1...,1,Exps2...) = 1
/// - Or(Exps1...,0,Exps2...) = And(Exps1...,Exps2...)
/// - Or(Exp) = Exp
@ -103,7 +103,7 @@ namespace spot
/// - Fusion(Exps1...,[*0],Exps2...) = 0
/// - Fusion(Exp) = Exp
/// - Fusion(Exps1...,BoolExp1...BoolExpN,Exps2,Exps3...) =
/// Fusion(Exps1...,AndNLM(And(BoolExp1...BoolExpN),Exps2),Exps3...)
/// Fusion(Exps1...,And(BoolExp1...BoolExpN),Exps2,Exps3...)
static formula* instance(type op, vec* v);
virtual void accept(visitor& v);