Examples of ZeroArgFunction

org.luaj.vm2.lib.ZeroArgFunction
Abstract base class for Java function implementations that take no arguments and return one value.
Subclasses need only implement {@link LuaValue#call()} to complete this class, simplifying development. All other uses of {@link #call(LuaValue)}, {@link #invoke(Varargs)},etc, are routed through this method by this class.
If one or more arguments are required, or variable argument or variable return values, then use one of the related function {@link OneArgFunction}, {@link TwoArgFunction}, {@link ThreeArgFunction}, or {@link VarArgFunction}.
See {@link LibFunction} for more information on implementation libraries and library functions. @see #call() @see LibFunction @see OneArgFunction @see TwoArgFunction @see ThreeArgFunction @see VarArgFunction

Examples of org.luaj.vm2.lib.ZeroArgFunction


    private void fakeWikiBase() {
        // fake http://www.mediawiki.org/wiki/Extension:Wikibase
        final LuaValue mw = globals.get("mw");
        final LuaTable wikibase = new LuaTable();
        wikibase.set("getEntity", new ZeroArgFunction() {
            @Override public LuaValue call() {
                return NIL;
            }
        });
        mw.set("wikibase", wikibase);

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Examples of org.luaj.vm2.lib.ZeroArgFunction

            }
        };
    }


    private LuaValue isSubsting() {
        return new ZeroArgFunction() {
            @Override public LuaValue call() {
                // TODO
                return FALSE;
            }
        };

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Examples of org.luaj.vm2.lib.ZeroArgFunction

            }
        };
    }


    private LuaValue incrementExpensiveFunctionCount() {
        return new ZeroArgFunction() {
            @Override public LuaValue call() {
                if (++expensiveFunctionCount > MAX_EXPENSIVE_CALLS) {
                    error("too many expensive function calls");
                }
                return NIL;

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Examples of org.luaj.vm2.lib.ZeroArgFunction

            }
        };
    }


    private LuaValue getContLangCode() {
        return new ZeroArgFunction() {
            @Override
            public LuaValue call() {
                return valueOf("en");
            }
        };

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Examples of org.luaj.vm2.lib.ZeroArgFunction

        table.set("getEntityTable", getEntityTable());
        return table;
    }


    private LuaValue getEntityTable() {
        return new ZeroArgFunction() {
            @Override
            public LuaValue call() {
                return NIL;
            }
        };

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Examples of org.luaj.vm2.lib.ZeroArgFunction

    _G.set("a", aaa);
    newenv.set("a", eee);


    // function tests
    {
      LuaFunction f = new ZeroArgFunction(_G) { public LuaValue call() { return env.get("a");}};
      assertEquals( aaa, f.call() );
      f.setfenv(newenv);
      assertEquals( newenv, f.getfenv() );
      assertEquals( eee, f.call() );
    }
    
    // closure tests
    {
      Prototype p = createPrototype( "return a\n", "closuretester" );
      LuaClosure c = new LuaClosure(p, _G);
      assertEquals( aaa, c.call() );
      c.setfenv(newenv);
      assertEquals( newenv, c.getfenv() );
      assertEquals( eee, c.call() );
    }


    // thread tests, functions created in threads inherit the thread's environment initially
    // those closures created not in any other function get the thread's enviroment
    Prototype p2 = createPrototype( "return loadstring('return a')", "threadtester" );
    {
      LuaThread t = new LuaThread(new LuaClosure(p2,_G), _G);
      Varargs v = t.resume(LuaValue.NONE);
      assertEquals(LuaValue.TRUE, v.arg(1) );
      LuaValue f = v.arg(2);
      assertEquals( LuaValue.TFUNCTION, f.type() );
      assertEquals( aaa, f.call() );
      assertEquals( _G, f.getfenv() );
    }
    {
      // change the thread environment after creation!
      LuaThread t = new LuaThread(new LuaClosure(p2,_G), _G);
      t.setfenv(newenv);
      Varargs v = t.resume(LuaValue.NONE);
      assertEquals(LuaValue.TRUE, v.arg(1) );
      LuaValue f = v.arg(2);
      assertEquals( LuaValue.TFUNCTION, f.type() );
      assertEquals( eee, f.call() );
      assertEquals( newenv, f.getfenv() );
    }
    {
      // let the closure have a different environment from the thread
      Prototype p3 = createPrototype( "return function() return a end", "envtester" );
      LuaThread t = new LuaThread(new LuaClosure(p3,newenv), _G);
      Varargs v = t.resume(LuaValue.NONE);
      assertEquals(LuaValue.TRUE, v.arg(1) );
      LuaValue f = v.arg(2);
      assertEquals( LuaValue.TFUNCTION, f.type() );
      assertEquals( eee, f.call() );
      assertEquals( newenv, f.getfenv() );
    }
  }

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