func lexItem(l *lex.Lexer) lex.StateFn {
l.Push(lexMeta)
l.Push(lexAmount)
l.Push(lexAt)
l.Push(lexAmount)
l.Push(lexAccount)
return lexStatus
}
func lexTrans(l *lex.Lexer) lex.StateFn {
l.Emit(tokBeginTrans)
l.Push(lexEndTrans)
l.Push(lexItems)
l.Push(lexMeta)
l.Push(lexPayee)
l.Push(lexStatus)
return lexDate
}
func lexItems(l *lex.Lexer) lex.StateFn {
if l.AcceptRun(indent) == 0 {
return nil
} else if string(l.Peek()) == meta {
l.Push(lexItems)
return lexMeta
}
l.Ignore()
l.Push(lexItems)
return lexItem
}
// lexStart looks for a comment or a transaction, it emits everything
// inbetween as tokText
func lexStart(l *lex.Lexer) lex.StateFn {
switch r := l.Peek(); {
case string(r) == meta:
l.Push(lexStart)
return lexMeta
case unicode.IsDigit(r):
l.Push(lexStart)
return lexTrans
case isSpace(r) || isNewline(r):
l.Push(lexStart)
return lexBlankLine
case r == lex.EOF:
l.Emit(lex.TokEOF)
return nil
default:
l.Errorf("unexpected text on line %v", l.LineNumber())
l.Push(lexStart)
return lexSkipLine
}
}