//Evaluate the check fragment for the full check.
public override object VisitCheckfrag([NotNull] algoParser.CheckfragContext context)
{
//Evaluate the expressions on the left and right, depending on the operator.
if (context.GRTR_THAN() != null)
{
// Binary greater than.
//Evaluate both the expressions.
AlgoValue left = (AlgoValue)VisitExpr(context.expr()[0]);
AlgoValue right = (AlgoValue)VisitExpr(context.expr()[1]);
return(new AlgoValue()
{
Type = AlgoValueType.Boolean,
Value = AlgoComparators.GreaterThan(context, left, right, false),
});
}
else if (context.GRTR_THAN_ET() != null)
{
// Binary greater than or equal to.
//Evaluate both the expressions.
AlgoValue left = (AlgoValue)VisitExpr(context.expr()[0]);
AlgoValue right = (AlgoValue)VisitExpr(context.expr()[1]);
return(new AlgoValue()
{
Type = AlgoValueType.Boolean,
Value = AlgoComparators.GreaterThan(context, left, right, true),
});
}
else if (context.LESS_THAN() != null)
{
// Binary less than.
//Evaluate both the expressions.
AlgoValue left = (AlgoValue)VisitExpr(context.expr()[0]);
AlgoValue right = (AlgoValue)VisitExpr(context.expr()[1]);
return(new AlgoValue()
{
Type = AlgoValueType.Boolean,
Value = AlgoComparators.LessThan(context, left, right, false),
});
}
else if (context.LESS_THAN_ET() != null)
{
// Binary less than or equal to.
//Evaluate both the expressions.
AlgoValue left = (AlgoValue)VisitExpr(context.expr()[0]);
AlgoValue right = (AlgoValue)VisitExpr(context.expr()[1]);
return(new AlgoValue()
{
Type = AlgoValueType.Boolean,
Value = AlgoComparators.LessThan(context, left, right, true),
});
}
else if (context.BIN_EQUALS() != null)
{
//Binary EQUALS.
//Evaluate the left and right values.
AlgoValue left = (AlgoValue)VisitExpr(context.expr()[0]);
AlgoValue right = (AlgoValue)VisitExpr(context.expr()[1]);
//Return whether these two are equal, as AlgoValue.
return(new AlgoValue()
{
Type = AlgoValueType.Boolean,
Value = AlgoComparators._Equals(context, left, right),
});
}
else if (context.BIN_NET() != null)
{
//Binary not equal to.
//Evaluate the left and right values.
AlgoValue left = (AlgoValue)VisitExpr(context.expr()[0]);
AlgoValue right = (AlgoValue)VisitExpr(context.expr()[1]);
//Return whether these two are equal, as AlgoValue.
return(new AlgoValue()
{
Type = AlgoValueType.Boolean,
Value = !AlgoComparators._Equals(context, left, right),
});
}
else
{
//Only a single value, so evaluate and return.
return((AlgoValue)VisitExpr(context.expr()[0]));
}
}
/// <summary>
/// Visit a parse tree produced by <see cref="algoParser.checkfrag"/>.
/// <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 VisitCheckfrag([NotNull] algoParser.CheckfragContext context)
{
return(VisitChildren(context));
}
/// <summary>
/// Exit a parse tree produced by <see cref="algoParser.checkfrag"/>.
/// <para>The default implementation does nothing.</para>
/// </summary>
/// <param name="context">The parse tree.</param>
public virtual void ExitCheckfrag([NotNull] algoParser.CheckfragContext context)
{
}
