func lexSection(l *lex.Lexer) lex.StateFn {
for {
switch l.Next() {
case lex.EOF:
return l.Errorf("Unexpected EOF in section")
case '\n':
return l.Errorf("Section: Missing right bracket")
case rightBracket:
l.Backup()
l.Emit(tSection)
return lexRightBracket
}
}
}
func lexKey(l *lex.Lexer) lex.StateFn {
for {
switch l.Next() {
case lex.EOF:
return l.Errorf("Unexpected EOF")
case equalSign:
if l.Pos > l.Start {
l.Backup()
l.Emit(tKey)
return lexEqualSign
}
return l.Errorf("Unexpected equal sign")
}
}
}
func lexStart(l *lex.Lexer) lex.StateFn {
l.AcceptWhitespace(lex.Ignore)
r := l.Next()
switch r {
case lex.EOF:
l.Emit(lex.TEOF)
return nil
case leftBracket:
l.Backup()
return lexLeftBracket
default:
if lex.IsAlphaNumeric(r) {
return lexKey
}
return l.Errorf("Unknown charecter: %v", string(r))
}
}
func lexValue(l *lex.Lexer) lex.StateFn {
for {
switch l.Next() {
case lex.EOF:
if l.Pos > l.Start {
l.Backup()
l.Emit(tValue)
l.Emit(lex.TEOF)
return nil
}
return l.Errorf("Unexpected equal sign")
case '\n':
l.Backup()
l.Emit(tValue)
l.Next(lex.Ignore)
return lexStart
}
}
}