/*
Copyright 2012 James Iry
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.pogofish.jadt.samples.ast;
// START SNIPPET: imports
import static com.pogofish.jadt.samples.ast.data.Arg.*;
import static com.pogofish.jadt.samples.ast.data.Expression.*;
import static com.pogofish.jadt.samples.ast.data.Function.*;
import static com.pogofish.jadt.samples.ast.data.Statement.*;
import static com.pogofish.jadt.samples.ast.data.Type.*;
import static java.util.Arrays.asList;
import java.util.HashSet;
import java.util.List;
import java.util.Set;
// END SNIPPET: imports
import com.pogofish.jadt.samples.ast.data.*;
/**
* This class shows how to use the code generated by the sample ast. It is marked up with START SNIPPET and END SNIPPET boundaries to support
* /jADT/src/site/apt/index.apt
*/
public class Usage {
public Function sampleFunction() {
// START SNIPPET: sampleFunction
Function sampleFunction = _Function(_Int(), "addTwo",
asList(_Arg(_Int(), "x"), _Arg(_Int(), "y")),
asList(_Return(_Add(_Variable("x"), _Variable("y")))));
// END SNIPPET: sampleFunction
return sampleFunction;
}
// START SNIPPET: expressionLiterals
public Set<Integer> expressionLiterals(Expression expression) {
return expression.match(new Expression.MatchBlock<Set<Integer>>() {
@Override
public Set<Integer> _case(Add x) {
final Set<Integer> results = expressionLiterals(x.left);
results.addAll(expressionLiterals(x.right));
return results;
}
@Override
public Set<Integer> _case(Variable x) {
return new HashSet<Integer>();
}
@Override
public Set<Integer> _case(IntLiteral x) {
return new HashSet<Integer>(asList(x.value));
}
@Override
public Set<Integer> _case(LongLiteral x) {
return new HashSet<Integer>();
}
});
}
// END SNIPPET: expressionLiterals
// START SNIPPET: hasReturn
public boolean hasReturn(List<Statement> statements) {
boolean hasReturn = false;
for (Statement statement : statements) {
hasReturn = hasReturn || statement.match(new Statement.MatchBlockWithDefault<Boolean>() {
@Override
public Boolean _case(Return x) {
return true;
}
@Override
public Boolean _default(Statement x) {
return false;
}
});
}
return hasReturn;
}
// END SNIPPET: hasReturn
}