luaL_optinteger

luaL_optinteger[-0, +0, v]

lua_Integer luaL_optinteger (lua_State *L,
                             int arg,
                             lua_Integer d);

If the function argument arg is an integer (or convertible to an integer), returns this integer. If this argument is absent or is nil, returns d. Otherwise, raises an error.

Links:

https://www.lua.org/manual/5.3/manual.html#luaL_optinteger

doc_lua

2017-02-21 04:12:27

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