Question

我正在学习Luaj库，我正在尝试在单元测试中实现双曲线示例：

@Test
public void testHyperbolicLuaScriptExample() throws Exception {
    URL luaScriptUrl = Thread.currentThread().getContextClassLoader().getResource("hyperbolic.lua");
    Assert.assertNotNull(luaScriptUrl);
    String luaScriptUrlPath = luaScriptUrl.getPath();
    File luaScriptFile = new File(luaScriptUrlPath);
    FileInputStream luaScriptFileInputStream = new FileInputStream(luaScriptFile);
    Prototype luaScriptPrototype = LuaC.instance.compile(luaScriptFileInputStream, "");
    Globals luaScriptStandardGlobals = JsePlatform.standardGlobals();
    LuaClosure luaClosure = new LuaClosure(luaScriptPrototype, luaScriptStandardGlobals);
    LuaValue luaValue = luaClosure.call();
}

hyperbolic.java按照the example

构建

import org.luaj.vm2.LuaValue;
import org.luaj.vm2.lib.*;

public class hyperbolic extends TwoArgFunction {

    public hyperbolic() {}

    public LuaValue call(LuaValue moduleName, LuaValue environment) {
        LuaValue library = tableOf();
        library.set("sinh", new sinh());
        library.set("cosh", new cosh());
        environment.set("com.apple.aide.lua.hyperbolic", library);
        return library;
    }

    static class sinh extends OneArgFunction {
        public LuaValue call(LuaValue x) {
            return LuaValue.valueOf(Math.sinh(x.checkdouble()));
        }
    }

    static class cosh extends OneArgFunction {
        public LuaValue call(LuaValue x) {
            return LuaValue.valueOf(Math.cosh(x.checkdouble()));
        }
    }
}

in hyberbolic.lua

require 'hyperbolic'

return {"x", hyperbolic.sinh(0.5), "y", hyperbolic.cosh(0.5)}

但是测试会产生以下错误

org.luaj.vm2.LuaError: @hyperbolic.lua:3 loop or previous error loading module 'hyperbolic'
    at org.luaj.vm2.LuaValue.error(Unknown Source)
    at org.luaj.vm2.lib.PackageLib$require.call(Unknown Source)
    at org.luaj.vm2.LuaClosure.execute(Unknown Source)
    at org.luaj.vm2.LuaClosure.call(Unknown Source)
    at org.luaj.vm2.lib.PackageLib$require.call(Unknown Source)
    at org.luaj.vm2.LuaClosure.execute(Unknown Source)
    at org.luaj.vm2.LuaClosure.call(Unknown Source)
    at com.example.LuaScriptExecutionTest.testHyperbolicLuaScriptExample(LuaScriptExecutionTest.java:52)

这个错误是什么意思，我该如何解决？

Answer 1

in hyberbolic.lua（原文如此，应该是双曲线的）

require 'hyperbolic'

您需要一个与require发生的文件同名的模块，这会导致循环（这就是错误消息的内容）。只需重命名当前文件（hyperbolic.lua），错误就会消失。

Luaj / Java：org.luaj.vm2.LuaError：循环或上一个错误加载模块

1 个答案: