public override Node VisitUnaryExpr(ML4DParser.UnaryExprContext context)
{
UnaryExpressionNode node;
switch (context.op.Type)
{
case ML4DLexer.MINUS:
node = new UnaryMinusNode("-");
node.Inner = (ExpressionNode)Visit(context.right);
break;
case ML4DLexer.NOT:
node = new NotNode("not");
node.Inner = (ExpressionNode)Visit(context.inner);
break;
default:
throw new NotSupportedException(
$"The operator {context.op.Text}, is not a valid unary operator.");
}
return(node);
}
/// <summary>
/// Exit a parse tree produced by the <c>unaryExpr</c>
/// labeled alternative in <see cref="ML4DParser.expr"/>.
/// <para>The default implementation does nothing.</para>
/// </summary>
/// <param name="context">The parse tree.</param>
public virtual void ExitUnaryExpr([NotNull] ML4DParser.UnaryExprContext context)
{
}
/// <summary>
/// Visit a parse tree produced by the <c>unaryExpr</c>
/// labeled alternative in <see cref="ML4DParser.expr"/>.
/// <para>
/// The default implementation returns the result of calling <see cref="AbstractParseTreeVisitor{Result}.VisitChildren(IRuleNode)"/>
/// on <paramref name="context"/>.
/// </para>
/// </summary>
/// <param name="context">The parse tree.</param>
/// <return>The visitor result.</return>
public virtual Result VisitUnaryExpr([NotNull] ML4DParser.UnaryExprContext context)
{
return(VisitChildren(context));
}