public override object VisitSelectionStatement([NotNull] CMinusParser.SelectionStatementContext context)
{
this.labelGenerator.IncrementIfCount();
string endLabel = this.labelGenerator.GenerateIfLabel();
this.Visit(context.logicalOrExpression());
if (context.elseStatement != null)
{
string elseLabel = this.labelGenerator.GenerateElseLabel();
this.writer.WriteConditionalJump(elseLabel);
this.Visit(context.ifStatement);
this.writer.WriteUnconditionalJump(endLabel);
this.writer.WriteLabel(elseLabel);
this.Visit(context.elseStatement);
}
else
{
this.writer.WriteConditionalJump(endLabel);
this.Visit(context.ifStatement);
}
this.writer.WriteLabel(endLabel);
return(null);
}
public override object VisitSelectionStatement([NotNull] CMinusParser.SelectionStatementContext context)
{
int selectionEndLabel = this.labelGenerator.GenerateLabel();
int elseBodyLabel = this.labelGenerator.GenerateLabel();
this.Visit(context.logicalOrExpression());
if (context.elseStatement != null)
{
this.writer.WriteJumpIfFalse(elseBodyLabel);
this.Visit(context.ifStatement);
this.writer.WriteUnconditionalJump(selectionEndLabel);
this.writer.WriteLabel(elseBodyLabel);
this.Visit(context.elseStatement);
}
else
{
this.writer.WriteJumpIfFalse(selectionEndLabel);
this.Visit(context.ifStatement);
}
this.writer.WriteLabel(selectionEndLabel);
return(null);
}
public override object VisitSelectionStatement([NotNull] CMinusParser.SelectionStatementContext context)
{
this.Visit(context.logicalOrExpression());
this.internalScope++;
this.symbolTable.EnterScope();
this.Visit(context.ifStatement);
this.symbolTable.ExitScope();
this.internalScope--;
if (context.elseStatement != null)
{
this.internalScope++;
this.symbolTable.EnterScope();
this.Visit(context.elseStatement);
this.symbolTable.ExitScope();
this.internalScope--;
}
return(null);
}
