package org.renjin.compiler.ir.tac.functions;
import org.renjin.compiler.ir.exception.InvalidSyntaxException;
import org.renjin.compiler.ir.tac.IRBodyBuilder;
import org.renjin.compiler.ir.tac.expressions.Constant;
import org.renjin.compiler.ir.tac.expressions.Expression;
import org.renjin.compiler.ir.tac.statements.GotoStatement;
import org.renjin.sexp.FunctionCall;
import org.renjin.sexp.Null;
import org.renjin.sexp.Symbol;
public class BreakTranslator extends FunctionCallTranslator {
@Override
public Symbol getName() {
return Symbol.get("break");
}
@Override
public Expression translateToExpression(IRBodyBuilder builder,
TranslationContext context, FunctionCall call) {
addStatement(builder, context, call);
return new Constant(Null.INSTANCE);
}
@Override
public void addStatement(IRBodyBuilder builder, TranslationContext context,
FunctionCall call) {
if(!(context instanceof LoopContext)) {
throw new InvalidSyntaxException("`break` cannot be used outside of a loop");
}
LoopContext loopContext = (LoopContext)context;
builder.addStatement( new GotoStatement(loopContext.getExitLabel()));
}
}