Method SetMetaTable

lua.go:1150–1165

SetMetaTable pops a table from the stack and sets it as the new metatable for the value at index. http://www.lua.org/manual/5.2/manual.html#lua_setmetatable

(index int)

//
// http://www.lua.org/manual/5.2/manual.html#lua_setmetatable
func (l *State) SetMetaTable(index int) {
	l.checkElementCount(1)
	mt, ok := l.stack[l.top-1].(*table)
	if apiCheck && !ok && l.stack[l.top-1] != nil {
		panic("table expected")
	}
	switch v := l.indexToValue(index).(type) {
	case *table:
		v.metaTable = mt
	case *userData:
		v.metaTable = mt
	default:
		l.global.metaTables[l.TypeOf(index)] = mt
	}
	l.top--
}

// Error generates a Lua error.  The error message must be on the stack top.
// The error can be any of any Lua type. This function will panic().