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The Hodor DSL
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| import org.codehaus.groovy.control.CompilerConfiguration | |
| /* | |
| * Copyright 2003-2014 the original author or authors. | |
| * | |
| * 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. | |
| */ | |
| // The "Hodor" DSL for Groovy | |
| // freely inspired from the Brainfuck programming lanchage | |
| def config = new CompilerConfiguration() | |
| config.scriptBaseClass = DelegatingScript.name | |
| def shell = new GroovyShell(config) | |
| def script = shell.parse ''' | |
| hodor.hodor.hodor.hodor.hodor.hodor.hodor.hodor.hodor.hodor | |
| hodor { | |
| hodor Hodor | |
| hodor.hodor.hodor.hodor.hodor.hodor.hodor | |
| hodor Hodor | |
| hodor.hodor.hodor.hodor.hodor.hodor.hodor.hodor.hodor.hodor | |
| hodor Hodor | |
| hodor | |
| hodor.hodor | |
| hodor Hodor | |
| hodor | |
| hodor 'hodor' | |
| hodor 'hodor' | |
| hodor 'hodor' | |
| hodor 'hodor' | |
| HODOR | |
| } | |
| hodor Hodor | |
| hodor.hodor | |
| hodor() | |
| hodor Hodor | |
| hodor.hodor.hodor | |
| hodor.hodor.hodor | |
| hodor | |
| hodor.hodor | |
| hodor.hodor | |
| hodor() | |
| HODOR.HODOR.HODOR.HODOR | |
| HODOR.HODOR.HODOR.HODOR | |
| HODOR.HODOR | |
| HODOR | |
| hodor() | |
| hodor.hodor | |
| hodor.hodor | |
| hodor.hodor.hodor | |
| hodor.hodor.hodor.hodor | |
| hodor() | |
| hodor | |
| hodor.hodor | |
| hodor() | |
| hodor Hodor | |
| hodor.hodor.hodor | |
| hodor() | |
| ''' | |
| script.setDelegate(new HodorEnvironment()) | |
| script.run() // prints "Hodor!" | |
| class HodorEnvironment { | |
| private char[] buffer = new char[128] | |
| private int ptr = 0 | |
| public static final int Hodor = 1 | |
| public static final String Hodorr = 'hodor' | |
| private void resize() { | |
| int len = 2*buffer.length | |
| char[] copy = new char[len] | |
| System.arraycopy(buffer, 0, copy, 0, buffer.length) | |
| buffer = copy | |
| } | |
| HodorEnvironment getHodor() { | |
| buffer[ptr]++ | |
| this | |
| } | |
| HodorEnvironment getHODOR() { | |
| buffer[ptr]-- | |
| this | |
| } | |
| HodorEnvironment hodor(Closure cl) { | |
| def clone = cl.rehydrate(this, this, this) | |
| while (buffer[ptr]!=0) { | |
| clone() | |
| } | |
| this | |
| } | |
| HodorEnvironment hodor(int h) { | |
| if (h==Hodor) { | |
| ptr++ | |
| if (ptr==buffer.length) { | |
| resize() | |
| } | |
| } | |
| this | |
| } | |
| HodorEnvironment hodor(String h) { | |
| if (h==Hodorr) { | |
| ptr-- | |
| } | |
| this | |
| } | |
| void hodor() { | |
| print buffer[ptr] | |
| } | |
| public String toString() { | |
| StringBuilder sb = new StringBuilder() | |
| sb.append(buffer, 0, ptr+1) | |
| sb | |
| } | |
| } |
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