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tl: fix handling of f##[0:0]g, and of ##[0:n]g

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The first issue was reported by Victor Khomenko.

* spot/tl/formula.cc: Introduce a single-argument
version of sugar_delay().
* spot/parsetl/parsetl.yy: Use it.
* doc/tl/tl.tex, spot/tl/formula.hh: Adjust doc.
* tests/core/ltlfilt.test, tests/core/sugar.test: More tests.
This commit is contained in:
Alexandre Duret-Lutz 2019-05-20 20:59:33 +02:00
parent 66a3b6f7cb
commit 90a88d0b5a
6 changed files with 58 additions and 13 deletions
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11
doc/tl/tl.tex
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@ -785,11 +785,12 @@ omitted.
f\DELAYR{0..}g & \equiv (f\FUSION{}g)\OR(f\CONCAT{}\1\STAR{}\CONCAT{}g)\quad\text{if~}\varepsilon\VDash f \land \varepsilon\VDash g
\end{align*}
\begin{align*}
f\DELAY{\mvar{i}} g & \equiv f\DELAYR{\mvar{i}..\mvar{i}} g & {}\DELAY{\mvar{i}} g & \equiv \1\DELAYR{\mvar{i}..\mvar{i}} g \\
f\DELAYP{}g & \equiv f\DELAYR{1..}g & \DELAYP{} g & \equiv\DELAYR{1..}g \\
f\DELAYS{}g & \equiv f\DELAYR{0..}g & \DELAYS{} g & \equiv\DELAYR{0..}g
f\DELAYR{..\mvar{j}} g & \equiv f\DELAYR{0..\mvar{j}} g\} & \DELAYR{..\mvar{j}} g & \equiv \1\DELAYR{0..\mvar{j}} g\} \\
f\DELAYR{..} g & \equiv f\DELAYR{0..} f g\} & \DELAYR{..} g & \equiv \1\DELAYR{0..} g\} \\
\DELAYR{\mvar{i}..\mvar{j}}g & \equiv \1\STAR{\mvar{i}..\mvar{j}}\CONCAT g & \DELAYR{\mvar{i}..}g & \equiv \1\STAR{\mvar{i}..}\CONCAT g \\
f\DELAY{\mvar{i}} g & \equiv f\DELAYR{\mvar{i}..\mvar{i}} g & {}\DELAY{\mvar{i}} g & \equiv \1\STAR{\mvar{i}}\CONCAT g \\
f\DELAYP{}g & \equiv f\DELAYR{1..}g & \DELAYP{} g & \equiv\DELAYR{1..}g \\
f\DELAYS{}g & \equiv f\DELAYR{0..}g & \DELAYS{} g & \equiv\DELAYR{0..}g \\
f\DELAYR{..\mvar{j}} g & \equiv f\DELAYR{0..\mvar{j}} g\} & \DELAYR{..\mvar{j}} g & \equiv \1\DELAYR{0..\mvar{j}} g\} \\
f\DELAYR{..} g & \equiv f\DELAYR{0..} f g\} & \DELAYR{..} g & \equiv \1\DELAYR{0..} g\}
\end{align*}
\subsection{Trivial Identities (Occur Automatically)}