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Add trivial identities for &&, <>->, []-> and Boolean arguments.

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* src/ltlast/binop.cc (EConcat, UConcat): Rewrite "{b}<>-> f"
as "b && f", and rewrite "{b}[]->f" as "b->f".
* src/ltlast/binop.hh (binop::instance): Document trivial
identities for <>-> and []->.
* src/ltlast/multop.cc (multop::instance): Rewrite "b1 & b2"
as "b1 && b2" when b1 and b2 are Boolean.
(multop::multop): Always disable is.boolean for AndNLM.
* src/ltlast/multop.hh: Document the rewriting.
* src/ltltest/equals.cc: Show the two formulas if the exit_code
is 1, to help debugging.
* src/ltltest/equals.test: Add more tests.
* src/ltltest/kind.test: Adjust tests.
This commit is contained in:
Alexandre Duret-Lutz 2011-02-23 15:11:44 +01:00
parent 0e4e2a79b2
commit a2da5184b5
7 changed files with 63 additions and 13 deletions
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src/ltltest/equals.test
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@ -51,6 +51,9 @@ run 0 ../equals 'a & false & a' 'false'
run 0 ../equals 'a | false | a' 'a'
run 0 ../equals 'true | a | a' 'true'
run 0 ../equals '{a*}!' '{a*}<>->1'
run 0 ../equals '{a -> b} (c)' '(a->b)->c'
run 0 ../equals '{a & !b}!' 'a & !b'
run 0 ../equals '{a;[*0]}|->!Xb' 'a -> !Xb'
# other formulae which are not
run 1 ../equals 'a' 'b'