// A set command: evaluating an expression where the operator is an assignment-type
public override int VisitSetExpression(YarnSpinnerParser.SetExpressionContext context)
{
// checking the expression is of the correct form
var expression = context.expression();
// TODO: is there really no more elegant way of doing this?!
if (expression is YarnSpinnerParser.ExpMultDivModEqualsContext ||
expression is YarnSpinnerParser.ExpPlusMinusEqualsContext)
{
// run the expression, it handles it from here
Visit(expression);
}
else
{
// throw an error
throw ParseException.Make(context, "Invalid expression inside assignment statement");
}
return(0);
}
/// <summary>
/// Visit a parse tree produced by the <c>setExpression</c>
/// labeled alternative in <see cref="YarnSpinnerParser.set_statement"/>.
/// <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 VisitSetExpression([NotNull] YarnSpinnerParser.SetExpressionContext context)
{
return(VisitChildren(context));
}
/// <summary>
/// Exit a parse tree produced by the <c>setExpression</c>
/// labeled alternative in <see cref="YarnSpinnerParser.set_statement"/>.
/// <para>The default implementation does nothing.</para>
/// </summary>
/// <param name="context">The parse tree.</param>
public virtual void ExitSetExpression([NotNull] YarnSpinnerParser.SetExpressionContext context)
{
}