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corrections from Asko Kauppi

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Roberto Ierusalimschy 2003-01-21 15:45:11 -02:00
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manual.tex
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@ -1,4 +1,4 @@
% $Id: manual.tex,v 1.64 2002/12/11 13:43:15 roberto Exp roberto $ % $Id: manual.tex,v 1.65 2003/01/20 11:03:05 roberto Exp roberto $
%{[( %{[(
\documentclass[11pt,twoside]{article} \documentclass[11pt,twoside]{article}
@ -134,7 +134,7 @@ Waldemar Celes
\tecgraf\ --- Computer Science Department --- PUC-Rio \tecgraf\ --- Computer Science Department --- PUC-Rio
} }
%\date{{\small \tt\$Date: 2002/12/11 13:43:15 $ $}} %\date{{\small \tt\$Date: 2003/01/20 11:03:05 $ $}}
\maketitle \maketitle
@ -570,8 +570,10 @@ and can contain the C-like escape sequences
`\verb|\t|' (horizontal tab), `\verb|\t|' (horizontal tab),
`\verb|\v|' (vertical tab), `\verb|\v|' (vertical tab),
`\verb|\\|' (backslash), `\verb|\\|' (backslash),
`\verb|\"|' (double quote), `\verb|\"|' (quotation mark),
`\verb|\'|' (single quote), `\verb|\'|' (apostrophe),
`\verb|\[|' (left square bracket),
`\verb|\]|' (right square bracket),
and `\verb|\|\emph{newline}' (that is, a backslash followed by a real newline, and `\verb|\|\emph{newline}' (that is, a backslash followed by a real newline,
which results in a newline in the string). which results in a newline in the string).
A character in a string may also be specified by its numerical value A character in a string may also be specified by its numerical value
@ -1393,7 +1395,7 @@ functions \verb|setmetatable| and \verb|getmetatable| \see{pdf-getmetatable}.
For each of those operations Lua associates a specific key For each of those operations Lua associates a specific key
called an \emph{event}. called an \emph{event}.
When Lua performs one of those operations over a table or a userdata, When Lua performs one of those operations over a table or a userdata,
if checks whether that object has a metatable with the corresponding event. it checks whether that object has a metatable with the corresponding event.
If so, the value associated with that key (the \IndexEmph{metamethod}) If so, the value associated with that key (the \IndexEmph{metamethod})
controls how Lua will perform the operation. controls how Lua will perform the operation.
@ -1519,11 +1521,11 @@ the \verb|<| operation.
\item[``le'':]\IndexTM{lt} \item[``le'':]\IndexTM{lt}
the \verb|<=| operation. the \verb|<=| operation.
\begin{verbatim} \begin{verbatim}
function lt_event (op1, op2) function le_event (op1, op2)
if type(op1) == "number" and type(op2) == "number" then if type(op1) == "number" and type(op2) == "number" then
return op1 < op2 -- numeric comparison return op1 <= op2 -- numeric comparison
elseif type(op1) == "string" and type(op2) == "string" then elseif type(op1) == "string" and type(op2) == "string" then
return op1 < op2 -- lexicographic comparison return op1 <= op2 -- lexicographic comparison
else else
local h = getbinhandler(op1, op2, "__le") local h = getbinhandler(op1, op2, "__le")
if h then if h then
@ -1804,13 +1806,10 @@ like a daemon or a web server ---
might need to release states as soon as they are not needed, might need to release states as soon as they are not needed,
to avoid growing too large. to avoid growing too large.
With the exception of \verb|lua_open|,
all functions in the Lua API need a state as their first argument.
\subsection{Threads} \subsection{Threads}
Lua offers a partial support for multiple threads of execution. Lua offers partial support for multiple threads of execution.
If you have a C~library that offers multi-threading, If you have a C~library that offers multi-threading,
then Lua can cooperate with it to implement the equivalent facility in Lua. then Lua can cooperate with it to implement the equivalent facility in Lua.
Also, Lua implements its own coroutine system on top of threads. Also, Lua implements its own coroutine system on top of threads.
@ -2247,7 +2246,7 @@ and then it frees its corresponding memory.
\subsection{Metatables} \subsection{Metatables}
The following functions allow you do manipulate the metatables The following functions allow you to manipulate the metatables
of an object: of an object:
\begin{verbatim} \begin{verbatim}
int lua_getmetatable (lua_State *L, int objindex); int lua_getmetatable (lua_State *L, int objindex);
@ -2338,7 +2337,7 @@ The table is left where it was in the stack;
this is convenient for getting multiple values from a table. this is convenient for getting multiple values from a table.
As in Lua, this function may trigger a metamethod As in Lua, this function may trigger a metamethod
for the ``gettable'' or ``index'' events \see{metatable}. for the ``index'' event \see{metatable}.
To get the real value of any table key, To get the real value of any table key,
without invoking any metamethod, without invoking any metamethod,
use the \emph{raw} version: use the \emph{raw} version:
@ -2989,7 +2988,7 @@ The current content of this string is {\tt "Lua \Version"}.
\subsubsection*{\ff \T{assert (v [, message])}}\DefLIB{assert} \subsubsection*{\ff \T{assert (v [, message])}}\DefLIB{assert}
Issues an \emph{``assertion failed!''} error Issues an \emph{``assertion failed!''} error
when its argument \verb|v| is \nil; when its argument \verb|v| is \nil{} or \false;
otherwise, returns this argument. otherwise, returns this argument.
This function is equivalent to the following Lua function: This function is equivalent to the following Lua function:
\begin{verbatim} \begin{verbatim}
@ -3692,10 +3691,10 @@ so that subsequent calls to \verb|table.getn(table)| return \verb|n|.
This library is an interface to most of the functions of the This library is an interface to most of the functions of the
standard C~math library. standard C~math library.
(Some have slightly different names.) (Some have slightly different names.)
It provides all its functions inside the table \verb|math|\DefLIB{math}. It provides all its functions inside the table \IndexLIB{math}.
In addition, In addition,
it registers a ??tag method for the binary exponentiation operator \verb|^| it registers a ??tag method for the binary exponentiation operator \verb|^|
that returns \Math{x^y} when applied to numbers \verb|x^y|. that returns \Math{x^y} when applied to numbers \verb|x| and \verb|y|.
The library provides the following functions: The library provides the following functions:
\DefLIB{math.abs}\DefLIB{math.acos}\DefLIB{math.asin}\DefLIB{math.atan} \DefLIB{math.abs}\DefLIB{math.acos}\DefLIB{math.asin}\DefLIB{math.atan}