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fix timed until

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This commit is contained in:
Marcell Vazquez-Chanlatte 2020-04-06 13:04:04 -07:00
parent 31c3d3bead
commit 74f6efa314
2 changed files with 14 additions and 3 deletions
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10
mtl/sugar.py
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@ -25,5 +25,11 @@ def until(phi, psi):
return ast.WeakUntil(phi, psi) & env(psi)
def timed_until(phi, psi, lo, hi):
return env(psi, lo=lo, hi=hi) & alw(until(phi, psi), lo=0, hi=lo)
def timed_until(left, right, lo, hi):
assert 0 <= lo < hi
expr = env(right, lo=lo, hi=hi)
expr &= alw(left, lo=0, hi=lo)
expr &= alw(until(left, right), lo=lo, hi=lo)
return expr