/// <summary>
/// Visit a parse tree produced by <see cref="Z80EvalParser.z80Spec"/>.
/// <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 VisitZ80Spec(Z80EvalParser.Z80SpecContext context)
{
if (IsInvalidContext(context))
{
return(null);
}
if (context.reg8() != null || context.reg16() != null)
{
return(new Z80RegisterNode(context.GetText().ToUpper()));
}
if (context.flags() != null)
{
return(new Z80FlagNode(context.GetText().ToUpper()));
}
if (context.memIndirect() != null)
{
var specifier = "";
if (context.memIndirect().BYTEF() != null)
{
specifier = "B";
}
else if (context.memIndirect().WORDF() != null)
{
specifier = "W";
}
else if (context.memIndirect().DWORDF() != null)
{
specifier = "DW";
}
return(new MemoryIndirectNode((ExpressionNode)VisitExpr(context.memIndirect().expr()),
specifier));
}
return(null);
}
/// <summary>
/// Visit a parse tree produced by <see cref="Z80EvalParser.z80Spec"/>.
/// <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 VisitZ80Spec([NotNull] Z80EvalParser.Z80SpecContext context)
{
return(VisitChildren(context));
}
/// <summary>
/// Exit a parse tree produced by <see cref="Z80EvalParser.z80Spec"/>.
/// <para>The default implementation does nothing.</para>
/// </summary>
/// <param name="context">The parse tree.</param>
public virtual void ExitZ80Spec([NotNull] Z80EvalParser.Z80SpecContext context)
{
}
