Sophie: ghc-ForSyDe-devel-3.1.1-4.fc14 i686

ghc-ForSyDe-devel-3.1.1-4.fc14.i686.rpm

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>ForSyDe.Shallow.Signal</TITLE
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>ForSyDe-3.1.1: ForSyDe's Haskell-embedded Domain Specific Language.</TD
><TD CLASS="topbut"
><A HREF="src/ForSyDe-Shallow-Signal.html"
>Source code</A
></TD
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>Contents</A
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>Index</A
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><FONT SIZE="6"
>ForSyDe.Shallow.Signal</FONT
></TD
><TD ALIGN="right"
><TABLE CLASS="narrow" CELLSPACING="0" CELLPADDING="0"
><TR
><TD CLASS="infohead"
>Portability</TD
><TD CLASS="infoval"
>portable</TD
></TR
><TR
><TD CLASS="infohead"
>Stability</TD
><TD CLASS="infoval"
>experimental</TD
></TR
><TR
><TD CLASS="infohead"
>Maintainer</TD
><TD CLASS="infoval"
>forsyde-dev@ict.kth.se</TD
></TR
></TABLE
></TD
></TR
></TABLE
></TD
></TR
><TR
><TD CLASS="s15"
></TD
></TR
><TR
><TD CLASS="section1"
>Description</TD
></TR
><TR
><TD CLASS="doc"
>This module defines the shallow-embedded <TT
><A HREF="ForSyDe-Shallow-Signal.html#t%3ASignal"
>Signal</A
></TT
> datatype and
 functions operating on it.
</TD
></TR
><TR
><TD CLASS="s15"
></TD
></TR
><TR
><TD CLASS="section1"
>Synopsis</TD
></TR
><TR
><TD CLASS="s15"
></TD
></TR
><TR
><TD CLASS="body"
><TABLE CLASS="vanilla" CELLSPACING="0" CELLPADDING="0"
><TR
><TD CLASS="decl"
><TABLE CLASS="vanilla" CELLSPACING="0" CELLPADDING="0"
><TR
><TD CLASS="decl"
><SPAN CLASS="keyword"
>data</SPAN
>  <A HREF="#t%3ASignal"
>Signal</A
> a </TD
></TR
><TR
><TD CLASS="body"
><TABLE CLASS="vanilla" CELLSPACING="0" CELLPADDING="0"
><TR
><TD CLASS="decl"
>= <A HREF="#v%3ANullS"
>NullS</A
></TD
></TR
><TR
><TD CLASS="decl"
>| a <A HREF="#v%3A%3A-"
>:-</A
> (<A HREF="ForSyDe-Shallow-Signal.html#t%3ASignal"
>Signal</A
> a)</TD
></TR
></TABLE
></TD
></TR
></TABLE
></TD
></TR
><TR
><TD CLASS="s8"
></TD
></TR
><TR
><TD CLASS="decl"
><A HREF="#v%3A-%3A"
>(-:)</A
> ::  <A HREF="ForSyDe-Shallow-Signal.html#t%3ASignal"
>Signal</A
> a -&gt; a -&gt; <A HREF="ForSyDe-Shallow-Signal.html#t%3ASignal"
>Signal</A
> a</TD
></TR
><TR
><TD CLASS="s8"
></TD
></TR
><TR
><TD CLASS="decl"
><A HREF="#v%3A%2B-%2B"
>(+-+)</A
> ::  <A HREF="ForSyDe-Shallow-Signal.html#t%3ASignal"
>Signal</A
> a -&gt; <A HREF="ForSyDe-Shallow-Signal.html#t%3ASignal"
>Signal</A
> a -&gt; <A HREF="ForSyDe-Shallow-Signal.html#t%3ASignal"
>Signal</A
> a</TD
></TR
><TR
><TD CLASS="s8"
></TD
></TR
><TR
><TD CLASS="decl"
><A HREF="#v%3A%21-"
>(!-)</A
> ::  <A HREF="ForSyDe-Shallow-Signal.html#t%3ASignal"
>Signal</A
> a -&gt; <A HREF="/usr/share/doc/ghc/html/libraries/base-4.2.0.2/Data-Int.html#t%3AInt"
>Int</A
> -&gt; a</TD
></TR
><TR
><TD CLASS="s8"
></TD
></TR
><TR
><TD CLASS="decl"
><A HREF="#v%3Asignal"
>signal</A
> ::  [a] -&gt; <A HREF="ForSyDe-Shallow-Signal.html#t%3ASignal"
>Signal</A
> a</TD
></TR
><TR
><TD CLASS="s8"
></TD
></TR
><TR
><TD CLASS="decl"
><A HREF="#v%3AfromSignal"
>fromSignal</A
> ::  <A HREF="ForSyDe-Shallow-Signal.html#t%3ASignal"
>Signal</A
> a -&gt; [a]</TD
></TR
><TR
><TD CLASS="s8"
></TD
></TR
><TR
><TD CLASS="decl"
><A HREF="#v%3AunitS"
>unitS</A
> ::  a -&gt; <A HREF="ForSyDe-Shallow-Signal.html#t%3ASignal"
>Signal</A
> a</TD
></TR
><TR
><TD CLASS="s8"
></TD
></TR
><TR
><TD CLASS="decl"
><A HREF="#v%3AnullS"
>nullS</A
> ::  <A HREF="ForSyDe-Shallow-Signal.html#t%3ASignal"
>Signal</A
> a -&gt; <A HREF="/usr/share/doc/ghc/html/libraries/base-4.2.0.2/Data-Bool.html#t%3ABool"
>Bool</A
></TD
></TR
><TR
><TD CLASS="s8"
></TD
></TR
><TR
><TD CLASS="decl"
><A HREF="#v%3AheadS"
>headS</A
> ::  <A HREF="ForSyDe-Shallow-Signal.html#t%3ASignal"
>Signal</A
> a -&gt; a</TD
></TR
><TR
><TD CLASS="s8"
></TD
></TR
><TR
><TD CLASS="decl"
><A HREF="#v%3AtailS"
>tailS</A
> ::  <A HREF="ForSyDe-Shallow-Signal.html#t%3ASignal"
>Signal</A
> a -&gt; <A HREF="ForSyDe-Shallow-Signal.html#t%3ASignal"
>Signal</A
> a</TD
></TR
><TR
><TD CLASS="s8"
></TD
></TR
><TR
><TD CLASS="decl"
><A HREF="#v%3AatS"
>atS</A
> ::  <A HREF="/usr/share/doc/ghc/html/libraries/base-4.2.0.2/Data-Int.html#t%3AInt"
>Int</A
> -&gt; <A HREF="ForSyDe-Shallow-Signal.html#t%3ASignal"
>Signal</A
> a -&gt; a</TD
></TR
><TR
><TD CLASS="s8"
></TD
></TR
><TR
><TD CLASS="decl"
><A HREF="#v%3AtakeS"
>takeS</A
> ::  <A HREF="/usr/share/doc/ghc/html/libraries/base-4.2.0.2/Data-Int.html#t%3AInt"
>Int</A
> -&gt; <A HREF="ForSyDe-Shallow-Signal.html#t%3ASignal"
>Signal</A
> a -&gt; <A HREF="ForSyDe-Shallow-Signal.html#t%3ASignal"
>Signal</A
> a</TD
></TR
><TR
><TD CLASS="s8"
></TD
></TR
><TR
><TD CLASS="decl"
><A HREF="#v%3AdropS"
>dropS</A
> ::  <A HREF="/usr/share/doc/ghc/html/libraries/base-4.2.0.2/Data-Int.html#t%3AInt"
>Int</A
> -&gt; <A HREF="ForSyDe-Shallow-Signal.html#t%3ASignal"
>Signal</A
> a -&gt; <A HREF="ForSyDe-Shallow-Signal.html#t%3ASignal"
>Signal</A
> a</TD
></TR
><TR
><TD CLASS="s8"
></TD
></TR
><TR
><TD CLASS="decl"
><A HREF="#v%3AlengthS"
>lengthS</A
> ::  <A HREF="ForSyDe-Shallow-Signal.html#t%3ASignal"
>Signal</A
> b -&gt; <A HREF="/usr/share/doc/ghc/html/libraries/base-4.2.0.2/Data-Int.html#t%3AInt"
>Int</A
></TD
></TR
><TR
><TD CLASS="s8"
></TD
></TR
><TR
><TD CLASS="decl"
><A HREF="#v%3AinfiniteS"
>infiniteS</A
> ::  (a -&gt; a) -&gt; a -&gt; <A HREF="ForSyDe-Shallow-Signal.html#t%3ASignal"
>Signal</A
> a</TD
></TR
><TR
><TD CLASS="s8"
></TD
></TR
><TR
><TD CLASS="decl"
><A HREF="#v%3AcopyS"
>copyS</A
> :: <A HREF="/usr/share/doc/ghc/html/libraries/base-4.2.0.2/Prelude.html#t%3ANum"
>Num</A
> a =&gt; a -&gt; b -&gt; <A HREF="ForSyDe-Shallow-Signal.html#t%3ASignal"
>Signal</A
> b</TD
></TR
><TR
><TD CLASS="s8"
></TD
></TR
><TR
><TD CLASS="decl"
><A HREF="#v%3AselectS"
>selectS</A
> ::  <A HREF="/usr/share/doc/ghc/html/libraries/base-4.2.0.2/Data-Int.html#t%3AInt"
>Int</A
> -&gt; <A HREF="/usr/share/doc/ghc/html/libraries/base-4.2.0.2/Data-Int.html#t%3AInt"
>Int</A
> -&gt; <A HREF="ForSyDe-Shallow-Signal.html#t%3ASignal"
>Signal</A
> a -&gt; <A HREF="ForSyDe-Shallow-Signal.html#t%3ASignal"
>Signal</A
> a</TD
></TR
><TR
><TD CLASS="s8"
></TD
></TR
><TR
><TD CLASS="decl"
><A HREF="#v%3AwriteS"
>writeS</A
> :: <A HREF="/usr/share/doc/ghc/html/libraries/base-4.2.0.2/Text-Show.html#t%3AShow"
>Show</A
> a =&gt; <A HREF="ForSyDe-Shallow-Signal.html#t%3ASignal"
>Signal</A
> a -&gt; [<A HREF="/usr/share/doc/ghc/html/libraries/base-4.2.0.2/Data-Char.html#t%3AChar"
>Char</A
>]</TD
></TR
><TR
><TD CLASS="s8"
></TD
></TR
><TR
><TD CLASS="decl"
><A HREF="#v%3AreadS"
>readS</A
> :: <A HREF="/usr/share/doc/ghc/html/libraries/base-4.2.0.2/Text-Read.html#t%3ARead"
>Read</A
> a =&gt; [<A HREF="/usr/share/doc/ghc/html/libraries/base-4.2.0.2/Data-Char.html#t%3AChar"
>Char</A
>] -&gt; <A HREF="ForSyDe-Shallow-Signal.html#t%3ASignal"
>Signal</A
> a</TD
></TR
><TR
><TD CLASS="s8"
></TD
></TR
><TR
><TD CLASS="decl"
><A HREF="#v%3AfanS"
>fanS</A
> ::  (<A HREF="ForSyDe-Shallow-Signal.html#t%3ASignal"
>Signal</A
> a -&gt; <A HREF="ForSyDe-Shallow-Signal.html#t%3ASignal"
>Signal</A
> b) -&gt; (<A HREF="ForSyDe-Shallow-Signal.html#t%3ASignal"
>Signal</A
> a -&gt; <A HREF="ForSyDe-Shallow-Signal.html#t%3ASignal"
>Signal</A
> c) -&gt; <A HREF="ForSyDe-Shallow-Signal.html#t%3ASignal"
>Signal</A
> a -&gt; (<A HREF="ForSyDe-Shallow-Signal.html#t%3ASignal"
>Signal</A
> b, <A HREF="ForSyDe-Shallow-Signal.html#t%3ASignal"
>Signal</A
> c)</TD
></TR
></TABLE
></TD
></TR
><TR
><TD CLASS="s15"
></TD
></TR
><TR
><TD CLASS="section1"
>Documentation</TD
></TR
><TR
><TD CLASS="s15"
></TD
></TR
><TR
><TD CLASS="topdecl"
><TABLE CLASS="declbar"
><TR
><TD CLASS="declname"
><SPAN CLASS="keyword"
>data</SPAN
>  <A NAME="t:Signal"
><A NAME="t%3ASignal"
></A
></A
><B
>Signal</B
> a </TD
><TD CLASS="declbut"
><A HREF="src/ForSyDe-Shallow-Signal.html#Signal"
>Source</A
></TD
></TR
></TABLE
></TD
></TR
><TR
><TD CLASS="body"
><TABLE CLASS="vanilla" CELLSPACING="0" CELLPADDING="0"
><TR
><TD CLASS="ndoc"
>A signal is defined as a list of events. An event has a tag and a value. The tag of an event is defined by the position in the list. A signal is defined as an instance of the classes <TT
><A HREF="/usr/share/doc/ghc/html/libraries/base-4.2.0.2/Text-Read.html#t%3ARead"
>Read</A
></TT
> and <TT
><A HREF="/usr/share/doc/ghc/html/libraries/base-4.2.0.2/Text-Show.html#t%3AShow"
>Show</A
></TT
>. The signal 1 :- 2 :- NullS is represented as {1,2}.
</TD
></TR
><TR
><TD CLASS="section4"
>Constructors</TD
></TR
><TR
><TD CLASS="body"
><TABLE CLASS="vanilla" CELLSPACING="1" CELLPADDING="0"
><TR
><TD CLASS="arg"
><A NAME="v:NullS"
><A NAME="v%3ANullS"
></A
></A
><B
>NullS</B
></TD
><TD CLASS="rdoc"
></TD
></TR
><TR
><TD CLASS="arg"
>a <A NAME="v::-"
><A NAME="v%3A%3A-"
></A
></A
><B
>:-</B
> (<A HREF="ForSyDe-Shallow-Signal.html#t%3ASignal"
>Signal</A
> a)</TD
><TD CLASS="rdoc"
></TD
></TR
></TABLE
></TD
></TR
><TR
><TD CLASS="section4"
><IMG SRC="minus.gif" CLASS="coll" ONCLICK="toggle(this,'i:Signal')" ALT="show/hide"
> Instances</TD
></TR
><TR
><TD CLASS="body"
><DIV ID="i:Signal" STYLE="display:block;"
><TABLE CLASS="vanilla" CELLSPACING="1" CELLPADDING="0"
><TR
><TD CLASS="decl"
><A HREF="/usr/share/doc/ghc/html/libraries/base-4.2.0.2/Data-Eq.html#t%3AEq"
>Eq</A
> a =&gt; <A HREF="/usr/share/doc/ghc/html/libraries/base-4.2.0.2/Data-Eq.html#t%3AEq"
>Eq</A
> (<A HREF="ForSyDe-Shallow-Signal.html#t%3ASignal"
>Signal</A
> a)</TD
></TR
><TR
><TD CLASS="decl"
><A HREF="/usr/share/doc/ghc/html/libraries/base-4.2.0.2/Text-Read.html#t%3ARead"
>Read</A
> a =&gt; <A HREF="/usr/share/doc/ghc/html/libraries/base-4.2.0.2/Text-Read.html#t%3ARead"
>Read</A
> (<A HREF="ForSyDe-Shallow-Signal.html#t%3ASignal"
>Signal</A
> a)</TD
></TR
><TR
><TD CLASS="decl"
><A HREF="/usr/share/doc/ghc/html/libraries/base-4.2.0.2/Text-Show.html#t%3AShow"
>Show</A
> a =&gt; <A HREF="/usr/share/doc/ghc/html/libraries/base-4.2.0.2/Text-Show.html#t%3AShow"
>Show</A
> (<A HREF="ForSyDe-Shallow-Signal.html#t%3ASignal"
>Signal</A
> a)</TD
></TR
></TABLE
></DIV
></TD
></TR
></TABLE
></TD
></TR
><TR
><TD CLASS="s15"
></TD
></TR
><TR
><TD CLASS="topdecl"
><TABLE CLASS="declbar"
><TR
><TD CLASS="declname"
><A NAME="v:-:"
><A NAME="v%3A-%3A"
></A
></A
><B
>(-:)</B
> ::  <A HREF="ForSyDe-Shallow-Signal.html#t%3ASignal"
>Signal</A
> a -&gt; a -&gt; <A HREF="ForSyDe-Shallow-Signal.html#t%3ASignal"
>Signal</A
> a</TD
><TD CLASS="declbut"
><A HREF="src/ForSyDe-Shallow-Signal.html#-%3A"
>Source</A
></TD
></TR
></TABLE
></TD
></TR
><TR
><TD CLASS="doc"
>The operator '-:' adds at an element to a signal at the tail.
</TD
></TR
><TR
><TD CLASS="s15"
></TD
></TR
><TR
><TD CLASS="topdecl"
><TABLE CLASS="declbar"
><TR
><TD CLASS="declname"
><A NAME="v:+-+"
><A NAME="v%3A%2B-%2B"
></A
></A
><B
>(+-+)</B
> ::  <A HREF="ForSyDe-Shallow-Signal.html#t%3ASignal"
>Signal</A
> a -&gt; <A HREF="ForSyDe-Shallow-Signal.html#t%3ASignal"
>Signal</A
> a -&gt; <A HREF="ForSyDe-Shallow-Signal.html#t%3ASignal"
>Signal</A
> a</TD
><TD CLASS="declbut"
><A HREF="src/ForSyDe-Shallow-Signal.html#%2B-%2B"
>Source</A
></TD
></TR
></TABLE
></TD
></TR
><TR
><TD CLASS="doc"
>The operator <TT
><A HREF="ForSyDe-Shallow-Signal.html#v%3A%2B-%2B"
>+-+</A
></TT
> concatinates two signals into one signal.  
</TD
></TR
><TR
><TD CLASS="s15"
></TD
></TR
><TR
><TD CLASS="topdecl"
><TABLE CLASS="declbar"
><TR
><TD CLASS="declname"
><A NAME="v:!-"
><A NAME="v%3A%21-"
></A
></A
><B
>(!-)</B
> ::  <A HREF="ForSyDe-Shallow-Signal.html#t%3ASignal"
>Signal</A
> a -&gt; <A HREF="/usr/share/doc/ghc/html/libraries/base-4.2.0.2/Data-Int.html#t%3AInt"
>Int</A
> -&gt; a</TD
><TD CLASS="declbut"
><A HREF="src/ForSyDe-Shallow-Signal.html#%21-"
>Source</A
></TD
></TR
></TABLE
></TD
></TR
><TR
><TD CLASS="s15"
></TD
></TR
><TR
><TD CLASS="topdecl"
><TABLE CLASS="declbar"
><TR
><TD CLASS="declname"
><A NAME="v:signal"
><A NAME="v%3Asignal"
></A
></A
><B
>signal</B
> ::  [a] -&gt; <A HREF="ForSyDe-Shallow-Signal.html#t%3ASignal"
>Signal</A
> a</TD
><TD CLASS="declbut"
><A HREF="src/ForSyDe-Shallow-Signal.html#signal"
>Source</A
></TD
></TR
></TABLE
></TD
></TR
><TR
><TD CLASS="doc"
>The function <TT
><A HREF="ForSyDe-Shallow-Signal.html#v%3Asignal"
>signal</A
></TT
> converts a list into a signal.
</TD
></TR
><TR
><TD CLASS="s15"
></TD
></TR
><TR
><TD CLASS="topdecl"
><TABLE CLASS="declbar"
><TR
><TD CLASS="declname"
><A NAME="v:fromSignal"
><A NAME="v%3AfromSignal"
></A
></A
><B
>fromSignal</B
> ::  <A HREF="ForSyDe-Shallow-Signal.html#t%3ASignal"
>Signal</A
> a -&gt; [a]</TD
><TD CLASS="declbut"
><A HREF="src/ForSyDe-Shallow-Signal.html#fromSignal"
>Source</A
></TD
></TR
></TABLE
></TD
></TR
><TR
><TD CLASS="doc"
>The function <TT
><A HREF="ForSyDe-Shallow-Signal.html#v%3AfromSignal"
>fromSignal</A
></TT
> converts a signal into a list.
</TD
></TR
><TR
><TD CLASS="s15"
></TD
></TR
><TR
><TD CLASS="topdecl"
><TABLE CLASS="declbar"
><TR
><TD CLASS="declname"
><A NAME="v:unitS"
><A NAME="v%3AunitS"
></A
></A
><B
>unitS</B
> ::  a -&gt; <A HREF="ForSyDe-Shallow-Signal.html#t%3ASignal"
>Signal</A
> a</TD
><TD CLASS="declbut"
><A HREF="src/ForSyDe-Shallow-Signal.html#unitS"
>Source</A
></TD
></TR
></TABLE
></TD
></TR
><TR
><TD CLASS="doc"
>The function <TT
><A HREF="ForSyDe-Shallow-Signal.html#v%3AunitS"
>unitS</A
></TT
> creates a signal with one value.
</TD
></TR
><TR
><TD CLASS="s15"
></TD
></TR
><TR
><TD CLASS="topdecl"
><TABLE CLASS="declbar"
><TR
><TD CLASS="declname"
><A NAME="v:nullS"
><A NAME="v%3AnullS"
></A
></A
><B
>nullS</B
> ::  <A HREF="ForSyDe-Shallow-Signal.html#t%3ASignal"
>Signal</A
> a -&gt; <A HREF="/usr/share/doc/ghc/html/libraries/base-4.2.0.2/Data-Bool.html#t%3ABool"
>Bool</A
></TD
><TD CLASS="declbut"
><A HREF="src/ForSyDe-Shallow-Signal.html#nullS"
>Source</A
></TD
></TR
></TABLE
></TD
></TR
><TR
><TD CLASS="doc"
>The function <TT
><A HREF="ForSyDe-Shallow-Signal.html#v%3AnullS"
>nullS</A
></TT
> checks if a signal is empty.
</TD
></TR
><TR
><TD CLASS="s15"
></TD
></TR
><TR
><TD CLASS="topdecl"
><TABLE CLASS="declbar"
><TR
><TD CLASS="declname"
><A NAME="v:headS"
><A NAME="v%3AheadS"
></A
></A
><B
>headS</B
> ::  <A HREF="ForSyDe-Shallow-Signal.html#t%3ASignal"
>Signal</A
> a -&gt; a</TD
><TD CLASS="declbut"
><A HREF="src/ForSyDe-Shallow-Signal.html#headS"
>Source</A
></TD
></TR
></TABLE
></TD
></TR
><TR
><TD CLASS="doc"
>The function <TT
><A HREF="ForSyDe-Shallow-Signal.html#v%3AheadS"
>headS</A
></TT
> gives the first value - the head -  of a signal.
</TD
></TR
><TR
><TD CLASS="s15"
></TD
></TR
><TR
><TD CLASS="topdecl"
><TABLE CLASS="declbar"
><TR
><TD CLASS="declname"
><A NAME="v:tailS"
><A NAME="v%3AtailS"
></A
></A
><B
>tailS</B
> ::  <A HREF="ForSyDe-Shallow-Signal.html#t%3ASignal"
>Signal</A
> a -&gt; <A HREF="ForSyDe-Shallow-Signal.html#t%3ASignal"
>Signal</A
> a</TD
><TD CLASS="declbut"
><A HREF="src/ForSyDe-Shallow-Signal.html#tailS"
>Source</A
></TD
></TR
></TABLE
></TD
></TR
><TR
><TD CLASS="doc"
>The function <TT
><A HREF="ForSyDe-Shallow-Signal.html#v%3AtailS"
>tailS</A
></TT
> gives the rest of the signal - the tail.
</TD
></TR
><TR
><TD CLASS="s15"
></TD
></TR
><TR
><TD CLASS="topdecl"
><TABLE CLASS="declbar"
><TR
><TD CLASS="declname"
><A NAME="v:atS"
><A NAME="v%3AatS"
></A
></A
><B
>atS</B
> ::  <A HREF="/usr/share/doc/ghc/html/libraries/base-4.2.0.2/Data-Int.html#t%3AInt"
>Int</A
> -&gt; <A HREF="ForSyDe-Shallow-Signal.html#t%3ASignal"
>Signal</A
> a -&gt; a</TD
><TD CLASS="declbut"
><A HREF="src/ForSyDe-Shallow-Signal.html#atS"
>Source</A
></TD
></TR
></TABLE
></TD
></TR
><TR
><TD CLASS="doc"
>The function <TT
><A HREF="ForSyDe-Shallow-Signal.html#v%3AatS"
>atS</A
></TT
>  returns the n-th event in a signal. The numbering of events in a signal starts with 0. There is also an operator version of this function, '(!-)'.
</TD
></TR
><TR
><TD CLASS="s15"
></TD
></TR
><TR
><TD CLASS="topdecl"
><TABLE CLASS="declbar"
><TR
><TD CLASS="declname"
><A NAME="v:takeS"
><A NAME="v%3AtakeS"
></A
></A
><B
>takeS</B
> ::  <A HREF="/usr/share/doc/ghc/html/libraries/base-4.2.0.2/Data-Int.html#t%3AInt"
>Int</A
> -&gt; <A HREF="ForSyDe-Shallow-Signal.html#t%3ASignal"
>Signal</A
> a -&gt; <A HREF="ForSyDe-Shallow-Signal.html#t%3ASignal"
>Signal</A
> a</TD
><TD CLASS="declbut"
><A HREF="src/ForSyDe-Shallow-Signal.html#takeS"
>Source</A
></TD
></TR
></TABLE
></TD
></TR
><TR
><TD CLASS="doc"
>The function <TT
><A HREF="ForSyDe-Shallow-Signal.html#v%3AtakeS"
>takeS</A
></TT
> returns the first n values of a signal.
</TD
></TR
><TR
><TD CLASS="s15"
></TD
></TR
><TR
><TD CLASS="topdecl"
><TABLE CLASS="declbar"
><TR
><TD CLASS="declname"
><A NAME="v:dropS"
><A NAME="v%3AdropS"
></A
></A
><B
>dropS</B
> ::  <A HREF="/usr/share/doc/ghc/html/libraries/base-4.2.0.2/Data-Int.html#t%3AInt"
>Int</A
> -&gt; <A HREF="ForSyDe-Shallow-Signal.html#t%3ASignal"
>Signal</A
> a -&gt; <A HREF="ForSyDe-Shallow-Signal.html#t%3ASignal"
>Signal</A
> a</TD
><TD CLASS="declbut"
><A HREF="src/ForSyDe-Shallow-Signal.html#dropS"
>Source</A
></TD
></TR
></TABLE
></TD
></TR
><TR
><TD CLASS="doc"
>The function <TT
><A HREF="ForSyDe-Shallow-Signal.html#v%3AdropS"
>dropS</A
></TT
> drops the first $n$ values from a signal.
</TD
></TR
><TR
><TD CLASS="s15"
></TD
></TR
><TR
><TD CLASS="topdecl"
><TABLE CLASS="declbar"
><TR
><TD CLASS="declname"
><A NAME="v:lengthS"
><A NAME="v%3AlengthS"
></A
></A
><B
>lengthS</B
> ::  <A HREF="ForSyDe-Shallow-Signal.html#t%3ASignal"
>Signal</A
> b -&gt; <A HREF="/usr/share/doc/ghc/html/libraries/base-4.2.0.2/Data-Int.html#t%3AInt"
>Int</A
></TD
><TD CLASS="declbut"
><A HREF="src/ForSyDe-Shallow-Signal.html#lengthS"
>Source</A
></TD
></TR
></TABLE
></TD
></TR
><TR
><TD CLASS="doc"
>The function <TT
><A HREF="ForSyDe-Shallow-Signal.html#v%3AlengthS"
>lengthS</A
></TT
> returns the length of a finite signal.
</TD
></TR
><TR
><TD CLASS="s15"
></TD
></TR
><TR
><TD CLASS="topdecl"
><TABLE CLASS="declbar"
><TR
><TD CLASS="declname"
><A NAME="v:infiniteS"
><A NAME="v%3AinfiniteS"
></A
></A
><B
>infiniteS</B
> ::  (a -&gt; a) -&gt; a -&gt; <A HREF="ForSyDe-Shallow-Signal.html#t%3ASignal"
>Signal</A
> a</TD
><TD CLASS="declbut"
><A HREF="src/ForSyDe-Shallow-Signal.html#infiniteS"
>Source</A
></TD
></TR
></TABLE
></TD
></TR
><TR
><TD CLASS="doc"
><P
>The function <TT
><A HREF="ForSyDe-Shallow-Signal.html#v%3AinfiniteS"
>infiniteS</A
></TT
> creates an infinite signal. The first argument f is a function that is applied on the current value. The second argument x gives the first value of the signal.
</P
><PRE
> Signal&gt; takeS 5 (infiniteS (*3) 1)
 {1,3,9,27,81} :: Signal Integer
</PRE
></TD
></TR
><TR
><TD CLASS="s15"
></TD
></TR
><TR
><TD CLASS="topdecl"
><TABLE CLASS="declbar"
><TR
><TD CLASS="declname"
><A NAME="v:copyS"
><A NAME="v%3AcopyS"
></A
></A
><B
>copyS</B
> :: <A HREF="/usr/share/doc/ghc/html/libraries/base-4.2.0.2/Prelude.html#t%3ANum"
>Num</A
> a =&gt; a -&gt; b -&gt; <A HREF="ForSyDe-Shallow-Signal.html#t%3ASignal"
>Signal</A
> b</TD
><TD CLASS="declbut"
><A HREF="src/ForSyDe-Shallow-Signal.html#copyS"
>Source</A
></TD
></TR
></TABLE
></TD
></TR
><TR
><TD CLASS="doc"
>The function <TT
><A HREF="ForSyDe-Shallow-Signal.html#v%3AcopyS"
>copyS</A
></TT
> creates a signal with n values x.
</TD
></TR
><TR
><TD CLASS="s15"
></TD
></TR
><TR
><TD CLASS="topdecl"
><TABLE CLASS="declbar"
><TR
><TD CLASS="declname"
><A NAME="v:selectS"
><A NAME="v%3AselectS"
></A
></A
><B
>selectS</B
> ::  <A HREF="/usr/share/doc/ghc/html/libraries/base-4.2.0.2/Data-Int.html#t%3AInt"
>Int</A
> -&gt; <A HREF="/usr/share/doc/ghc/html/libraries/base-4.2.0.2/Data-Int.html#t%3AInt"
>Int</A
> -&gt; <A HREF="ForSyDe-Shallow-Signal.html#t%3ASignal"
>Signal</A
> a -&gt; <A HREF="ForSyDe-Shallow-Signal.html#t%3ASignal"
>Signal</A
> a</TD
><TD CLASS="declbut"
><A HREF="src/ForSyDe-Shallow-Signal.html#selectS"
>Source</A
></TD
></TR
></TABLE
></TD
></TR
><TR
><TD CLASS="doc"
><P
>The function <TT
><A HREF="ForSyDe-Shallow-Signal.html#v%3AselectS"
>selectS</A
></TT
> takes three parameters, an offset, a stepsize and a signal and returns some elements of the signal such as in the following example:
</P
><PRE
>
 Signal&gt; selectS 2 3 (signal[1,2,3,4,5,6,7,8,9,10])
 {3,6,9} :: Signal Integer
</PRE
></TD
></TR
><TR
><TD CLASS="s15"
></TD
></TR
><TR
><TD CLASS="topdecl"
><TABLE CLASS="declbar"
><TR
><TD CLASS="declname"
><A NAME="v:writeS"
><A NAME="v%3AwriteS"
></A
></A
><B
>writeS</B
> :: <A HREF="/usr/share/doc/ghc/html/libraries/base-4.2.0.2/Text-Show.html#t%3AShow"
>Show</A
> a =&gt; <A HREF="ForSyDe-Shallow-Signal.html#t%3ASignal"
>Signal</A
> a -&gt; [<A HREF="/usr/share/doc/ghc/html/libraries/base-4.2.0.2/Data-Char.html#t%3AChar"
>Char</A
>]</TD
><TD CLASS="declbut"
><A HREF="src/ForSyDe-Shallow-Signal.html#writeS"
>Source</A
></TD
></TR
></TABLE
></TD
></TR
><TR
><TD CLASS="doc"
><P
>The function <TT
><A HREF="ForSyDe-Shallow-Signal.html#v%3AwriteS"
>writeS</A
></TT
> transforms a signal into a string of the following format:
</P
><PRE
> 
 Signal&gt; writeS (signal[1,2,3,4,5])
 <A HREF="1n2n3n4n5n.html"
>1n2n3n4n5n</A
> :: [Char]
</PRE
></TD
></TR
><TR
><TD CLASS="s15"
></TD
></TR
><TR
><TD CLASS="topdecl"
><TABLE CLASS="declbar"
><TR
><TD CLASS="declname"
><A NAME="v:readS"
><A NAME="v%3AreadS"
></A
></A
><B
>readS</B
> :: <A HREF="/usr/share/doc/ghc/html/libraries/base-4.2.0.2/Text-Read.html#t%3ARead"
>Read</A
> a =&gt; [<A HREF="/usr/share/doc/ghc/html/libraries/base-4.2.0.2/Data-Char.html#t%3AChar"
>Char</A
>] -&gt; <A HREF="ForSyDe-Shallow-Signal.html#t%3ASignal"
>Signal</A
> a</TD
><TD CLASS="declbut"
><A HREF="src/ForSyDe-Shallow-Signal.html#readS"
>Source</A
></TD
></TR
></TABLE
></TD
></TR
><TR
><TD CLASS="doc"
><P
>The function <TT
><A HREF="ForSyDe-Shallow-Signal.html#v%3AreadS"
>readS</A
></TT
> transforms a formatted string into a signal.
</P
><PRE
>
 Signal&gt; readS <A HREF="1n2n3n4n5n.html"
>1n2n3n4n5n</A
> :: Signal Int
 {1,2,3,4,5} :: Signal Int
</PRE
></TD
></TR
><TR
><TD CLASS="s15"
></TD
></TR
><TR
><TD CLASS="topdecl"
><TABLE CLASS="declbar"
><TR
><TD CLASS="declname"
><A NAME="v:fanS"
><A NAME="v%3AfanS"
></A
></A
><B
>fanS</B
> ::  (<A HREF="ForSyDe-Shallow-Signal.html#t%3ASignal"
>Signal</A
> a -&gt; <A HREF="ForSyDe-Shallow-Signal.html#t%3ASignal"
>Signal</A
> b) -&gt; (<A HREF="ForSyDe-Shallow-Signal.html#t%3ASignal"
>Signal</A
> a -&gt; <A HREF="ForSyDe-Shallow-Signal.html#t%3ASignal"
>Signal</A
> c) -&gt; <A HREF="ForSyDe-Shallow-Signal.html#t%3ASignal"
>Signal</A
> a -&gt; (<A HREF="ForSyDe-Shallow-Signal.html#t%3ASignal"
>Signal</A
> b, <A HREF="ForSyDe-Shallow-Signal.html#t%3ASignal"
>Signal</A
> c)</TD
><TD CLASS="declbut"
><A HREF="src/ForSyDe-Shallow-Signal.html#fanS"
>Source</A
></TD
></TR
></TABLE
></TD
></TR
><TR
><TD CLASS="doc"
>The combinator <TT
><A HREF="ForSyDe-Shallow-Signal.html#v%3AfanS"
>fanS</A
></TT
> takes two processes p1 and p2 and and generates a process network, where a signal is split and processed by the processes p1 and p2.
</TD
></TR
><TR
><TD CLASS="s15"
></TD
></TR
><TR
><TD CLASS="botbar"
>Produced by <A HREF="http://www.haskell.org/haddock/"
>Haddock</A
> version 2.6.1</TD
></TR
></TABLE
></BODY
></HTML
>