com.github.kardapoltsev.astparser.parser.BaseLexer.scala Maven / Gradle / Ivy
/*
* Copyright 2016 Alexey Kardapoltsev
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package com.github.kardapoltsev.astparser.parser
import java.awt.event.KeyEvent
import scala.collection.mutable.ListBuffer
import scala.util.parsing.combinator.Parsers
import scala.util.parsing.combinator.lexical.Scanners
import scala.util.parsing.input.{CharSequenceReader, Reader}
abstract class BaseLexer extends Scanners with Parsers {
def scan(input: Reader[Char]): List[Token] = {
var r = new Scanner(input)
val buf = ListBuffer[Token]()
while (!r.atEnd) {
buf += r.first
r = r.rest
}
buf.toList
}
def scan(input: CharSequence): List[Token] = scan(new CharSequenceReader(input))
protected def isPrintableChar(c: Char): Boolean = {
val block = Character.UnicodeBlock.of(c)
(!Character.isISOControl(c)) &&
c != KeyEvent.CHAR_UNDEFINED &&
block != null &&
block != Character.UnicodeBlock.SPECIALS
}
}