简单 Lua Icxx 示例 |
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/* * The lua-icxx (C++) equivalent of API example at * https://lua-users.lua.ac.cn/wiki/SimpleLuaApiExample. * Oliver Schoenborn, Jul 2011 */ #include "lua_icxx/lua_icxx.h" #include "iof/fmtr.hpp" #include <iostream> int main() { LuaInterpreter L; /* Load the file containing the script we are going to run */ LuaFuncRef chunk = L.chunkFromFile("sample1.lua"); if ( chunk.isError() ) { std::cerr << "Couldn't load file: " << chunk.getErrMsg() << std::endl; exit(1); } LuaTableRef table = L.newTable(); for (int i = 1; i <= 5; i++) table[i] = i*2; /* By what name is the script going to reference our table? */ L.setGlobal("foo", table); /* Ask Lua to run our little script */ LuaTempResult res = chunk(); if ( res.isError() ) { std::cerr << "Failed to run script: " << res.getErrMsg() << std::endl; exit(1); } /* Get the returned value at the top of the stack (index -1) */ double sum = res[1]; // following line uses the iof library (ioflib.sf.net) for printf-output in c++ std::cout << iof::fmtr("Script returned: %.0fs") << sum << std::endl; return 0; }
在 1.x 版本中,lua-icxx 只支持部分 Lua C API,但 C API 可以与 lua-icxx 结合使用。扩展 lua-icxx 以涵盖更多 C API 很容易,请发邮件给作者 ([email protected])。
如果您想知道为什么 lua-icxx 不提供从 Lua 绑定到 C++ 代码的方法,那是因为其他工具(如 SWIG 和 tolua++)可以做到这一点。Lua-icxx 提供了这些和其他绑定库通常不提供的功能(从 C++ 应用程序轻松访问 Lua 解释器)。