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ExecuteString() doesn't work on multiline scripts

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Started by Gyrbo August 19, 2004 08:06 AM

4 comments, last by WitchLord 19 years, 10 months ago

Gyrbo

187

Author

August 19, 2004 08:06 AM

The following script fails to run correctly:


cfg.FullScreen = false;
cfg.OpenGL = true;

The error is:

ExecuteString (2, 19) : Error   : Expected expression value

If I place the two commands on one line it works correctly. I'm aware that this isn't exactly how ExecuteString() was meant to be used, but it provides a quick method of executing small scripts. Some more info: "cfg" is a global object of type "Config" with two members, "FullScreen" and "OpenGL" which are both bools. The script is placed in an external file and is used as a configuration file.

WitchLord

4,837

August 19, 2004 08:59 AM

ExecuteString() should be able to execute more than one statement, even on multiple lines. What happens is that the string you pass to it is wrapped inside a function like so:

script = "void ExecuteString() {" + string + ";}";

Then that script is compiled and executed.

I'll try to verify why your script doesn't work. It seems that it is a bug when there are ;; (the library adds one extra ;) at the end.

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WitchLord

4,837

August 19, 2004 04:21 PM

I ran the following test without problem with 1.9.1 WIP 2 (not yet released). Either you are doing something differently from me, or I've already managed to fix the bug you found without knowing it.

//// Tests ExecuteString() with multiple lines of code//// Test author: Andreas Jonsson//#include "angelscript.h"#include <stdio.h>#include <stddef.h>#define TESTNAME "TestExecuteString"struct Obj{	bool a;	bool b;} g_Obj;class COutStream : public asIOutputStream{public:	void AS_CALL Write(const char *text) { printf(text); }};bool TestExecuteString(){	bool fail = false; 	asIScriptEngine *engine = asCreateScriptEngine(ANGELSCRIPT_VERSION);	engine->RegisterObjectType("Obj", sizeof(Obj), asOBJ_CLASS);	engine->RegisterObjectProperty("Obj", "bool a", offsetof(Obj,a));	engine->RegisterObjectProperty("Obj", "bool b", offsetof(Obj,b));	engine->RegisterGlobalProperty("Obj g_Obj", &g_Obj);	g_Obj.a = false;	g_Obj.b = true;	COutStream out;	engine->ExecuteString(0, "g_Obj.a = true;\n"		                     "g_Obj.b = false;\n", &out, 0);	engine->Release();	if( !g_Obj.a || g_Obj.b )	{		printf("%s: ExecuteString() didn't execute correctly\n", TESTNAME);		fail = true;	}		// Success	return fail;}

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AngelScript - free scripting library - BMFont - free bitmap font generator - Tower - free puzzle game

WitchLord

4,837

August 19, 2004 04:25 PM

Wait, you say you load the script from file and then execute it? Could you check the string you are sending to ExecuteString() to see if there are no strange characters going in?

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AngelScript - free scripting library - BMFont - free bitmap font generator - Tower - free puzzle game

Gyrbo

187

Author

August 20, 2004 06:25 AM

I've made a couple of changes to the config file loader, and the error doesn't occur anymore. I was using some non-standard stuff, so that would probably be the problem (registering an array as an object).

WitchLord

4,837

August 20, 2004 08:24 AM

Ok. I'll ignore this potential bug for now. If it troubles you again let me know and I'll take a closer look at it.

AngelCode.com - game development and more - Reference DB - game developer references
AngelScript - free scripting library - BMFont - free bitmap font generator - Tower - free puzzle game

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