What do the error messages mean

drunken · 07-12-2008

I have just started using jass (at the suggestion of someone here) for a map I am making but I keep getting errors that I can't understand. I can't find on any website or forum any explanation as to what the errors mean.

The ones that say "missing <something>" are obvious
but when it says "expected a name" and "expected a code statement" are confusing me.
Yes I know what a name is and what a code statement is but when I get these errors I can never work out what I have done wrong.

Here is an example:

Code:

function Trig_GetPath_Actions takes nothing returns nothing

 set udg_ShortestPath = udg_MAXINT
 set udg_RecurseLevel = 0
 local integer i = 0 //expected a code statement
 loop
  exitwhen i = udg_MAXARRAY //expected a name
  set udg_Path[i] = false //expected a name
 endloop

endfunction

jasscraft simply says that line 5 has a syntax error and that i is undefined. the line with the syntax error is identical to a line straight from the manual...

Mr. Zero · 07-12-2008

I would recommend you use NewGen instead for JASS'ing. JASSHelper gives more correct error messages.

Anyway:

Code:

function Trig_GetPath_Actions takes nothing returns nothing

 set udg_ShortestPath = udg_MAXINT
 set udg_RecurseLevel = 0
 local integer i = 0 // local SHALL ALWAYS be in the top before any code. Locals can't be declared in the middle of the function.
 loop
  exitwhen i = udg_MAXARRAY // When doing a comparison action remember you will need two =, e.g. exitwhen i == udg_MAXARRAY
  set udg_Path[i] = false // No syntax error here. Forgot to declare it?
 endloop

endfunction

Corrected:

Code:

function Trig_GetPath_Actions takes nothing returns nothing
    local integer i = 0
    set udg_ShortestPath = udg_MAXINT
    set udg_RecurseLevel = 0
    loop
        exitwhen i == udg_MAXARRAY
        set udg_Path[i] = false
        set i = i + 1
    endloop
endfunction

drunken · 07-12-2008

Thanks that helped a lot but I still don't understand the error messages and now I have more examples. I would show you them but the editor just crashed and so all the work I had done was lost.

Is there a way I can stop it crashing? I have lost this (massively long and complicated) trigger 3 times now.

I'm getting angry, might play something else for a while.

Mr. Zero · 07-12-2008

Heh again get NewGen WE.

JASSHelper also replaces the script compiler hence stopping a crash when forgetting a endloop or endif, and inject itself into warcraft3 when you test the map to catch further crashes, such as endless loops or non-existing function calls.

drunken · 07-13-2008

Ok I got newgen.
I loaded up my map, rewrote the trigger, and it didn't crash. Then I fixed all the syntax errors, and it saved (compiled) successfully.

Then when I try to test the map it loads 3/4 and then crashes with a FATAL ERROR
Mermory could not be 'read'
and some memory addresses.

I tried disabling all the jass triggers and leaving only the we gui triggers, but it still crashes. If I load up wc3 seperately from the normal exe with all the jass triggers disabled I can get the map to load up but the 'map initialisation' event never fires so there is nothing there and it can't be played.

I may have set up newgen wrong or something but I am lost for a solution and now the map is broken

Mr. Zero · 07-13-2008

Sounds like you got some endless loop or a non exists function call there. Of course I can't tell what to do without you posting the JASS code so we can see what went wrong.

07-12-2008	#1
drunken Join Date: Jul 2008 Posts: 5	What do the error messages mean I have just started using jass (at the suggestion of someone here) for a map I am making but I keep getting errors that I can't understand. I can't find on any website or forum any explanation as to what the errors mean. The ones that say "missing <something>" are obvious but when it says "expected a name" and "expected a code statement" are confusing me. Yes I know what a name is and what a code statement is but when I get these errors I can never work out what I have done wrong. Here is an example: Code: function Trig_GetPath_Actions takes nothing returns nothing set udg_ShortestPath = udg_MAXINT set udg_RecurseLevel = 0 local integer i = 0 //expected a code statement loop exitwhen i = udg_MAXARRAY //expected a name set udg_Path[i] = false //expected a name endloop endfunction jasscraft simply says that line 5 has a syntax error and that i is undefined. the line with the syntax error is identical to a line straight from the manual...

07-12-2008	#3
drunken Join Date: Jul 2008 Posts: 5	Re: What do the error messages mean Thanks that helped a lot but I still don't understand the error messages and now I have more examples. I would show you them but the editor just crashed and so all the work I had done was lost. Is there a way I can stop it crashing? I have lost this (massively long and complicated) trigger 3 times now. I'm getting angry, might play something else for a while.

07-13-2008	#5
drunken Join Date: Jul 2008 Posts: 5	Re: What do the error messages mean Ok I got newgen. I loaded up my map, rewrote the trigger, and it didn't crash. Then I fixed all the syntax errors, and it saved (compiled) successfully. Then when I try to test the map it loads 3/4 and then crashes with a FATAL ERROR Mermory could not be 'read' and some memory addresses. I tried disabling all the jass triggers and leaving only the we gui triggers, but it still crashes. If I load up wc3 seperately from the normal exe with all the jass triggers disabled I can get the map to load up but the 'map initialisation' event never fires so there is nothing there and it can't be played. I may have set up newgen wrong or something but I am lost for a solution and now the map is broken