/// <summary>
/// Visit a parse tree produced by <see cref="Z80EvalParser.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 override object VisitExpr(Z80EvalParser.ExprContext context)
{
if (IsInvalidContext(context))
{
return(null);
}
var expr = (ExpressionNode)VisitOrExpr(context.orExpr());
if (context.ChildCount == 1)
{
return(expr);
}
return(new ConditionalExpressionNode()
{
Condition = expr,
TrueExpression = (ExpressionNode)VisitExpr(context.expr()[0]),
FalseExpression = (ExpressionNode)VisitExpr(context.expr()[1])
});
}
/// <summary>
/// Visit a parse tree produced by <see cref="Z80EvalParser.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 VisitExpr([NotNull] Z80EvalParser.ExprContext context)
{
return(VisitChildren(context));
}
/// <summary>
/// Exit a parse tree produced by <see cref="Z80EvalParser.expr"/>.
/// <para>The default implementation does nothing.</para>
/// </summary>
/// <param name="context">The parse tree.</param>
public virtual void ExitExpr([NotNull] Z80EvalParser.ExprContext context)
{
}