NAME

luaL_optlstring — if the function argument is a string, returns this string, function indicator [-0, +0, v]

SYNOPSIS

#include <lauxlib.h>

const char *
luaL_optlstring(lua_State *L, int narg, const char *d, size_t *l);

DESCRIPTION

luaL_optlstring() if the function argument narg is a string, returns this string. If this argument is absent or is nil, returns d. Otherwise, raises an error.

If l is not NULL, fills the position *l with the results's length.

SEE ALSO

Roberto Ierusalimschy, Luiz Henrique de Figueiredo, and Waldemar Celes, Lua 5.1 Reference Manual.

HISTORY

The luaL_optlstring() manual page is based on Lua Reference Manual 5.1 and was created by Sergey Bronnikov.