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tl: add support for ##[+] and ##[*]

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Suggested by Victor Khomenko.

* spot/parsetl/parsetl.yy, spot/parsetl/scantl.ll: Implement them.
* NEWS, doc/tl/tl.tex: Document them.
* tests/core/sugar.test: Add a couple of tests.
This commit is contained in:
Alexandre Duret-Lutz 2019-05-18 11:59:27 +02:00
parent b726d78cbd
commit f476483f4a
5 changed files with 19 additions and 3 deletions
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6
doc/tl/tl.tex
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@ -88,6 +88,8 @@
\newcommand{\CONCAT}{\mathbin{\texttt{;}}}
\newcommand{\DELAY}[1]{\mathbin{\texttt{\#\##1}}}
\newcommand{\DELAYR}[1]{\mathbin{\texttt{\#\#[#1]}}}
\newcommand{\DELAYP}[1]{\mathbin{\texttt{\#\#[+]}}}
\newcommand{\DELAYS}[1]{\mathbin{\texttt{\#\#[*]}}}
\newcommand{\0}{\texttt{0}}
\newcommand{\1}{\texttt{1}}
\newcommand{\STAR}[1]{\texttt{[*#1]}}
@ -779,7 +781,9 @@ omitted.
f\DELAYR{\mvar{i}..\mvar{j}} g &\equiv f\FUSION\{\STAR{\mvar{i}..\mvar{j}}\CONCAT g\} \\
{}\DELAYR{..} g &\equiv \STAR{}\CONCAT g & {}\DELAYR{\mvar{i}..} g &\equiv \STAR{\mvar{i}..}\CONCAT g \\
{}\DELAYR{..\mvar{j}} g &\equiv \STAR{0..\mvar{j}}\CONCAT g &
{}\DELAYR{\mvar{i}..\mvar{j}} g &\equiv \STAR{\mvar{i}..\mvar{j}}\CONCAT g
{}\DELAYR{\mvar{i}..\mvar{j}} g &\equiv \STAR{\mvar{i}..\mvar{j}}\CONCAT g \\
f \DELAYP{} g & \equiv f \DELAYR{1..} g & f \DELAYS{} g & \equiv f \DELAYR{0..} g \\
\DELAYP{} g & \equiv \DELAYR{1..} g & \DELAYS{} g & \equiv \DELAYR{0..} g
\end{align*}
\subsection{Trivial Identities (Occur Automatically)}