Mercurial > urweb
diff doc/manual.tex @ 2123:1218daa14279
Document new infix operators
author | Adam Chlipala <adam@chlipala.net> |
---|---|
date | Thu, 05 Mar 2015 14:58:34 -0500 |
parents | 6700f3700328 |
children | 15d46eb02570 |
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--- a/doc/manual.tex Thu Mar 05 14:50:31 2015 -0500 +++ b/doc/manual.tex Thu Mar 05 14:58:34 2015 -0500 @@ -632,6 +632,8 @@ It is possible to write a $\mt{let}$ expression with its constituents in reverse order, along the lines of Haskell's \cd{where}. An expression $\mt{let} \; e \; \mt{where} \; ed^* \; \mt{end}$ desugars to $\mt{let} \; ed^* \; \mt{in} \; e \; \mt{end}$. +Ur/Web also includes a few more infix operators: $f \; \texttt{<|} \; x$ desugars to $f \; x$, $x \; \texttt{|>} \; f$ to $f \; x$, $f \; \texttt{<{}<{}<} \; g$ to $\mt{Top}.\mt{compose} \; f \; g$, and $g \; \texttt{>{}>{}>} \; f$ to $\mt{Top}.\mt{compose} \; f \; g$. (The latter two are doing function composition in the usual way.) Furthermore, any identifier may be changed into an infix operator by placing it between backticks, e.g. a silly way to do addition is $x \; \texttt{`}\mt{plus}\texttt{`} \; y$ instead of $x + y$. + \section{Static Semantics}