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global table is also pseudo-index

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Roberto Ierusalimschy
2001-10-31 18:31:38 -02:00
parent af59848219
commit ec9d8308b4
1 changed files with 6 additions and 11 deletions
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17
manual.tex
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@@ -1,4 +1,4 @@
% $Id: manual.tex,v 1.51 2001/07/24 17:25:03 roberto Exp roberto $ % $Id: manual.tex,v 1.53 2001/10/31 18:06:05 roberto Exp roberto $
\documentclass[11pt,twoside,draft]{article} \documentclass[11pt,twoside,draft]{article}
\usepackage{fullpage} \usepackage{fullpage}
@@ -138,7 +138,7 @@ Waldemar Celes
\tecgraf\ --- Computer Science Department --- PUC-Rio \tecgraf\ --- Computer Science Department --- PUC-Rio
} }
%\date{{\small \tt\$Date: 2001/07/24 17:25:03 $ $}} %\date{{\small \tt\$Date: 2001/10/31 18:06:05 $ $}}
\maketitle \maketitle
@@ -1869,8 +1869,8 @@ any function that accepts valid indices can also be called with
which represent some Lua values that are accessible to the C~code which represent some Lua values that are accessible to the C~code
but are not in the stack. but are not in the stack.
Pseudo-indices are used to access the registry Pseudo-indices are used to access the table of globals \see{globals},
and the upvalues of a C function \see{c-closure}. the registry, and the upvalues of a C function \see{c-closure}.
\subsection{Stack Manipulation} \subsection{Stack Manipulation}
The API offers the following functions for basic stack manipulation: The API offers the following functions for basic stack manipulation:
@@ -2240,7 +2240,7 @@ The compiled chunk is left as a function on top of the stack.
The return values are the same as those of The return values are the same as those of
\verb|lua_dofile| and \verb|lua_dobuffer|. \verb|lua_dofile| and \verb|lua_dobuffer|.
\subsection{Manipulating Global Variables} \subsection{Manipulating Global Variables} \label{globals}
To read the value of a global Lua variable, To read the value of a global Lua variable,
you call you call
@@ -2275,12 +2275,7 @@ use \verb|lua_rawset| over the table of globals
(see below). (see below).
All global variables are kept in an ordinary Lua table. All global variables are kept in an ordinary Lua table.
You can get this table calling This table is always at pseudo-index \IndexAPI{LUA_GLOBALSINDEX}.
\begin{verbatim}
void lua_getglobals (lua_State *L);
\end{verbatim}
\DefAPI{lua_getglobals}
which pushes the current table of globals onto the stack.
To set another table as the table of globals, To set another table as the table of globals,
you call you call
\begin{verbatim} \begin{verbatim}