func (p *parser) ReadWord() (kit.Word, error) {
if p.onceAgainWord {
kit.Println("found unused last token")
p.Lock()
p.onceAgainWord = false
p.Unlock()
if p.lastWord == nil {
return nil, errors.New("no last read token")
}
return p.lastWord, nil
}
kit.Println("waiting for incoming word")
select {
case t := <-p.words:
p.lastWord = t
return t, nil
case <-time.After(kit.ParserTimeout):
// timeout
}
return nil, errors.New("no word gained")
}
func (l *lexer) ReadToken() (kit.Token, error) {
if l.onceAgainToken {
kit.Printf("found unused last token: %+v\n", l.lastToken)
l.Lock()
l.onceAgainToken = false
l.Unlock()
if l.lastToken == nil {
return nil, errors.New("no last read token")
}
return l.lastToken, nil
}
kit.Println("waiting for incoming token")
select {
case t := <-l.tokens:
l.lastToken = t
return t, nil
case <-time.After(kit.LexerTimeout):
// timeout
}
return nil, errors.New("no token gained")
}
func (ip *interp) run(words kit.WordScanner) {
m := ip.memo
var (
w kit.Word
err error
)
kit.Println("start RUN_LOOP")
RUN_LOOP:
for {
if w, err = words.ReadWord(); err != nil {
ip.errorCh <- err
break RUN_LOOP
}
kit.Printf("word: %+v", w)
switch w.GetWordType() {
case word.TNumberWord:
kit.Println("number word")
if _, err := w.Do(m); err != nil {
ip.errorCh <- err
break
}
case word.TStringWord:
kit.Println("string word")
if _, err := w.Do(m); err != nil {
ip.errorCh <- err
break
}
case word.TBoolWord:
kit.Println("bool word")
if _, err := w.Do(m); err != nil {
ip.errorCh <- err
break
}
case word.TArrayWord:
kit.Println("array word")
if _, err := w.Do(m); err != nil {
ip.errorCh <- err
break
}
case word.TFuncWord:
kit.Println("func word")
if _, err := w.Do(m); err != nil {
ip.errorCh <- err
break
}
case word.TNilWord:
kit.Println("nil word")
break RUN_LOOP
default:
kit.Printf("unknown word: %+v\n", w)
ip.errorCh <- errors.New("unknown word")
break RUN_LOOP
}
}
kit.Println("exit RUN_LOOP")
ip.stoppedCh <- struct{}{}
}