org.codehaus.groovy.tools.shell.util.CurlyCountingGroovyLexer.groovy Maven / Gradle / Ivy
Go to download
Show more of this group Show more artifacts with this name
Show all versions of groovy-all Show documentation
Show all versions of groovy-all Show documentation
Groovy: A powerful, dynamic language for the JVM
/*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you 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 org.codehaus.groovy.tools.shell.util
import org.codehaus.groovy.antlr.GroovySourceToken
import org.codehaus.groovy.antlr.SourceBuffer
import org.codehaus.groovy.antlr.UnicodeEscapingReader
import org.codehaus.groovy.antlr.parser.GroovyLexer
import org.codehaus.groovy.antlr.parser.GroovyTokenTypes
/**
* patching GroovyLexer to get access to Paren level
*/
class CurlyCountingGroovyLexer extends GroovyLexer {
private endReached = false
protected CurlyCountingGroovyLexer(Reader reader) {
super(reader)
}
static CurlyCountingGroovyLexer createGroovyLexer(String src) {
Reader unicodeReader = new UnicodeEscapingReader(new StringReader(src.toString()), new SourceBuffer())
CurlyCountingGroovyLexer lexer = new CurlyCountingGroovyLexer(unicodeReader)
unicodeReader.setLexer(lexer)
return lexer
}
int getParenLevel() {
return parenLevelStack.size()
}
// called by nextToken()
@Override
void uponEOF() {
super.uponEOF()
endReached = true
}
List toList() {
List tokens = []
GroovySourceToken token
while (! endReached) {
token = nextToken() as GroovySourceToken
tokens.add(token)
if (token.type == GroovyTokenTypes.EOF) {
break
}
}
return tokens
}
}