Re: [ANN] Lua 5.2.2 (rc3) now available
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- Subject: Re: [ANN] Lua 5.2.2 (rc3) now available
- From: Roberto Ierusalimschy <roberto@...>
- Date: 2013年3月15日 09:42:14 -0300
> When compiling with the command line compiler of Visual Studio 10
> Express, I get the following warning:
Warnings from Visual Studio always make me sad :(
> ...\lua-5.2.2\src\lgc.c(453) : warning C4334: '<<' : result of 32-bit
> shift implicitly converted to 64 bits (was 64-bit shift intended?)
How can we answer "no, it was not"?
Does this solve it?
- sizeof(Node) * sizenode(h);
+ sizeof(Node) * (int)sizenode(h);
Or maybe this?
- sizeof(Node) * sizenode(h);
+ sizeof(Node) * (size_t)sizenode(h);
> And when linking (despite the Cxxxx code, I use /LTCG) I get this warning:
>
> ...\lua-5.2.2\src\loadlib.c(187) : warning C4700: uninitialized local
> variable 'buffer' used
Let us see:
char buffer[128];
if (FormatMessageA(FORMAT_MESSAGE_IGNORE_INSERTS | FORMAT_MESSAGE_FROM_SYSTEM,
NULL, error, 0, buffer, sizeof(buffer)/sizeof(char), NULL))
lua_pushstring(L, buffer);
MS documentation says 'buffer' is an _Out_ parameter [1]. What can we do?
[1] http://msdn.microsoft.com/en-us/library/windows/desktop/ms679351%28v=vs.85%29.aspx
-- Roberto