BlitzMax LUA: unprotected error in call to Lua API

BlitzMax Forums/BlitzMax Programming/BlitzMax LUA: unprotected error in call to Lua API

Pineapple

(Posted 2012) [#1]

I have this lua file which, as far as I can tell, is being properly loaded and compiled:

function runonce()
end
function main()
end

when I do this in BlitzMax,

lua_getfield(script, LUA_GLOBALSINDEX, "main")
lua_call(script, 0, 0)

I get the critical error "PANIC: unprotected error in call to Lua API (attempt to call a nil value)"

What am I doing wrong here?

Last edited 2012

Pineapple

(Posted 2012) [#2]

Local script@ Ptr=luaL_newstate()
luaL_openlibs(script)
luaL_loadstring(script,"function main()~nprint(~qtest~q)~nend")
lua_getfield(script, LUA_GLOBALSINDEX, "main") 'Puts the function onto the stack
lua_call(script, 0, 0)

This doesn't work either. What?

Pineapple

(Posted 2012) [#3]

Also, this code does nothing.

Local script@ Ptr=luaL_newstate()
luaL_openlibs(script)
lua_register script,"pr",pr
luaL_loadstring(script,"pr")
lua_pcall(script,1,-1,-1)

Function pr%(state@ Ptr)
	Print "ok"
	Return 0
End Function

Last edited 2012

Pineapple

(Posted 2012) [#4]

I got it to work. for the reference of any future person who stumbles upon this seeking answers:

Local state@ Ptr=luaL_newstate()
luaL_openlibs(state)
lua_register state,"pr",pr
luaL_loadstring(state,"function test()~n~rprint(~qtest~q)~n~rpr()~n~rend~n~r")
lua_pcall(state,1,-1,-1)
lua_getfield(state, LUA_GLOBALSINDEX, "test") 'Puts the function onto the stack
lua_call(state, 0, 0)

Function pr%(state@ Ptr)
	Print "ok"
	Return 0
End Function