public override Expression VisitUnaryOpExp([NotNull] ExpressionAntlrParser.UnaryOpExpContext context)
{
var unaryOperationName = context.GetChild(0).GetText();
var operand = Visit(context.expression());
if (unaryOperationName == ExpressionType.Subtract ||
unaryOperationName == ExpressionType.Add)
{
return(MakeExpression(unaryOperationName, new Constant(0), operand));
}
return(MakeExpression(unaryOperationName, operand));
}
/// <summary>
/// Exit a parse tree produced by the <c>unaryOpExp</c>
/// labeled alternative in <see cref="ExpressionAntlrParser.expression"/>.
/// <para>The default implementation does nothing.</para>
/// </summary>
/// <param name="context">The parse tree.</param>
public virtual void ExitUnaryOpExp([NotNull] ExpressionAntlrParser.UnaryOpExpContext context)
{
}
/// <summary>
/// Visit a parse tree produced by the <c>unaryOpExp</c>
/// labeled alternative in <see cref="ExpressionAntlrParser.expression"/>.
/// <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 VisitUnaryOpExp([NotNull] ExpressionAntlrParser.UnaryOpExpContext context)
{
return(VisitChildren(context));
}
