/// <summary>
/// Visit a parse tree produced by <see cref="Z80TestParser.memPattern"/>.
/// <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 VisitMemPattern(Z80TestParser.MemPatternContext context)
{
if (IsInvalidContext(context))
{
return(null);
}
var node = new MemoryPatternMemberNode(context);
foreach (var body in context.memPatternBody())
{
node.Patterns.Add((MemoryPatternNode)VisitMemPatternBody(body));
}
return(node);
}
/// <summary>
/// Visits a memory pattern member
/// </summary>
/// <param name="plan">Test file plan</param>
/// <param name="testSetPlan">TestSetPlan to visit</param>
/// <param name="mempatMember">Memory pattern member syntax node</param>
private void VisitMemoryPatternMember(TestFilePlan plan, TestSetPlan testSetPlan, MemoryPatternMemberNode mempatMember)
{
// --- Check ID duplication
var id = mempatMember.Id;
if (testSetPlan.ContainsSymbol(id))
{
ReportError(Errors.T0006, plan, mempatMember.IdSpan, id);
return;
}
// --- Evaluate byte array
var bytes = new List <byte>();
var errorFound = false;
foreach (var mempat in mempatMember.Patterns)
{
if (mempat is BytePatternNode bytePattern)
{
foreach (var byteExpr in bytePattern.Bytes)
{
var value = Eval(plan, testSetPlan, byteExpr);
if (value != null)
{
bytes.Add((byte)value.AsNumber());
}
else
{
errorFound = true;
}
}
}
else if (mempat is WordPatternNode wordPattern)
{
foreach (var byteExpr in wordPattern.Words)
{
var value = Eval(plan, testSetPlan, byteExpr);
if (value != null)
{
var word = value.AsWord();
bytes.Add((byte)word);
bytes.Add((byte)(word >> 8));
}
else
{
errorFound = true;
}
}
}
else if (mempat is TextPatternNode textPattern)
{
foreach (var val in SyntaxHelper.SpectrumStringToBytes(textPattern.String))
{
bytes.Add(val);
}
}
}
if (errorFound)
{
return;
}
testSetPlan.SetDataMember(id, new ExpressionValue(bytes.ToArray()));
}
