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`assert' returns its first argument

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This commit is contained in:
Roberto Ierusalimschy
2001-01-31 17:53:01 -02:00
parent 60ff79451c
commit b68fb7f62e
2 changed files with 8 additions and 5 deletions
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5
lbaselib.c
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@@ -1,5 +1,5 @@
/* /*
** $Id: lbaselib.c,v 1.18 2001/01/10 16:58:11 roberto Exp roberto $ ** $Id: lbaselib.c,v 1.19 2001/01/25 16:45:36 roberto Exp roberto $
** Basic library ** Basic library
** See Copyright Notice in lua.h ** See Copyright Notice in lua.h
*/ */
@@ -404,7 +404,8 @@ static int luaB_assert (lua_State *L) {
luaL_checkany(L, 1); luaL_checkany(L, 1);
if (lua_isnil(L, 1)) if (lua_isnil(L, 1))
luaL_verror(L, "assertion failed! %.90s", luaL_opt_string(L, 2, "")); luaL_verror(L, "assertion failed! %.90s", luaL_opt_string(L, 2, ""));
return 0; lua_settop(L, 1);
return 1;
} }

8
manual.tex
View File

@@ -1,4 +1,4 @@
% $Id: manual.tex,v 1.47 2000/12/28 17:25:45 roberto Exp roberto $ % $Id: manual.tex,v 1.48 2001/01/29 19:33:55 roberto Exp roberto $
\documentclass[11pt]{article} \documentclass[11pt]{article}
\usepackage{fullpage} \usepackage{fullpage}
@@ -134,7 +134,7 @@ Waldemar Celes
\tecgraf\ --- Computer Science Department --- PUC-Rio \tecgraf\ --- Computer Science Department --- PUC-Rio
} }
\date{{\small \tt\$Date: 2000/12/28 17:25:45 $ $}} \date{{\small \tt\$Date: 2001/01/29 19:33:55 $ $}}
\maketitle \maketitle
@@ -2436,7 +2436,8 @@ to change the way such messages are shown
\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;
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}
function assert (v, m) function assert (v, m)
@@ -2444,6 +2445,7 @@ This function is equivalent to the following Lua function:
m = m or "" m = m or ""
error("assertion failed! " .. m) error("assertion failed! " .. m)
end end
return v
end end
\end{verbatim} \end{verbatim}