static void pushfuncname (lua_State *L, lua_Debug *ar) {
if (pushglobalfuncname(L, ar)) { /* try first a global name */
lua_pushfstring(L, "function '%s'", lua_tostring(L, -1));
lua_remove(L, -2); /* remove name */
}
else if (*ar->namewhat != '\0') /* is there a name from code? */
lua_pushfstring(L, "%s '%s'", ar->namewhat, ar->name); /* use it */
else if (*ar->what == 'm') /* main? */
lua_pushliteral(L, "main chunk");
else if (*ar->what != 'C') /* for Lua functions, use <file:line> */
lua_pushfstring(L, "function <%s:%d>", ar->short_src, ar->linedefined);
else /* nothing left... */
lua_pushliteral(L, "?");
}
LUALIB_API int luaL_argerror (lua_State *L, int narg, const char *extramsg) {
lua_Debug ar;
if (!lua_getstack(L, 0, &ar)) /* no stack frame? */
return luaL_error(L, "bad argument #%d (%s)", narg, extramsg);
lua_getinfo(L, "n", &ar);
if (strcmp(ar.namewhat, "method") == 0) {
narg--; /* do not count `self' */
if (narg == 0) /* error is in the self argument itself? */
return luaL_error(L, "calling " LUA_QS " on bad self", ar.name);
}
if (ar.name == NULL)
ar.name = (pushglobalfuncname(L, &ar)) ? lua_tostring(L, -1) : "?";
return luaL_error(L, "bad argument #%d to " LUA_QS " (%s)",
narg, ar.name, extramsg);
}
static void pushfuncname (lua_State *L, lua_Debug *ar) {
if (*ar->namewhat != '\0') /* is there a name? */
lua_pushfstring(L, "function " LUA_QS, ar->name);
else if (*ar->what == 'm') /* main? */
lua_pushfstring(L, "main chunk");
else if (*ar->what == 'C') {
if (pushglobalfuncname(L, ar)) {
lua_pushfstring(L, "function " LUA_QS, lua_tostring(L, -1));
lua_remove(L, -2); /* remove name */
}
else
lua_pushliteral(L, "?");
}
else
lua_pushfstring(L, "function <%s:%d>", ar->short_src, ar->linedefined);
}
