/*
* Copyright 2003-2011 JetBrains s.r.o.
*
* 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 jetbrains.mps.dataFlow.lang.framework.testLang;
import jetbrains.mps.lang.dataFlow.framework.StructuralProgramBuilder;
public class ExpressionProgramBuilder extends StructuralProgramBuilder<Expression> {
protected void doBuild(Expression expr) {
if (expr instanceof IfExpression) {
IfExpression ifExpression = (IfExpression) expr;
build(ifExpression.getCondition());
emitIfJump(before(ifExpression.getIfFalse()));
build(ifExpression.getIfTrue());
emitJump(after(ifExpression));
build(ifExpression.getIfFalse());
return;
}
if (expr instanceof WhileExpression) {
WhileExpression whileExpression = (WhileExpression) expr;
build(whileExpression.getCondition());
emitIfJump(after(whileExpression.getBody()));
build(whileExpression.getBody());
return;
}
if (expr instanceof SeqExpression) {
SeqExpression seq = (SeqExpression) expr;
for (Expression e : seq.getExpressions()) {
build(e);
}
return;
}
if (expr instanceof NopExpression) {
return;
}
if (expr instanceof AssignmentExpression) {
AssignmentExpression assignmentExpression = (AssignmentExpression) expr;
build(assignmentExpression.getValue());
emitWrite(assignmentExpression.getVariableName());
return;
}
if (expr instanceof VariableExpression) {
VariableExpression variableExpression = (VariableExpression) expr;
emitRead(variableExpression.getName());
return;
}
}
}