/// <summary>
/// Visit a parse tree produced by <see cref="Generated.Z80AsmParser.asmline"/>.
/// </summary>
/// <param name="context">The parse tree.</param>
/// <return>The visitor result.</return>
public override object VisitAsmline(Z80AsmParser.AsmlineContext context)
{
if (IsInvalidContext(context))
{
return(null);
}
_label = null;
_labelSpan = null;
_keywordSpan = null;
_numbers.Clear();
_identifiers.Clear();
_sourceLine = context.Start.Line;
_firstPos = context.Start.Column;
_comment = null;
_commentSpan = null;
// --- Obtain comments
var lastChild = context.GetChild(context.ChildCount - 1);
if (lastChild is Z80AsmParser.LabelContext labelContext)
{
// --- Handle label-only lines
VisitLabel(labelContext);
return(AddLine(new LabelOnlyLine(), context));
}
if (lastChild is Z80AsmParser.CommentContext commentContext)
{
_comment = commentContext.GetText();
_commentSpan = new TextSpan(commentContext.Start.StartIndex,
commentContext.Start.StopIndex + 1);
// --- Handle comment-only lines
if (context.ChildCount == 1)
{
return(AddLine(new CommentOnlyLine(), context));
}
}
var line = base.VisitAsmline(context);
// --- Let's save lines with parsing errors, too.
return(context.exception != null
? AddLine(new ParserErrorLine(), context)
: line);
}
public override object VisitAsmline(Z80AsmParser.AsmlineContext context)
{
CurrentLabel = null;
CurrentLabelColon = false;
CurrentComment = null;
LabelSpan = null;
KeywordSpan = null;
CommentSpan = null;
IssueToEmit = null;
IsFieldAssignment = false;
NumberSpans = null;
IdentifierSpans = null;
StringSpans = null;
FunctionSpans = null;
SemiVarSpans = null;
MacroParamSpans = null;
MacroParamNames = null;
SemiVarSpans = null;
StatementSpans = null;
OperandSpans = null;
MnemonicSpans = null;
if (context?.Start == null || context.Stop == null)
{
return(null);
}
var startIndex = context.start.StartIndex;
var stopIndex = context.stop.StopIndex;
CurrentSourceText = InputStream.GetText(new Interval(startIndex, stopIndex));
CurrentSourceLine = context.Start.Line;
FirstColumn = context.Start.Column;
FirstPosition = context.Start.StartIndex;
LastPosition = context.Stop.StopIndex;
object mainInstructionPart = null;
// --- Obtain label
var labelCtx = context.label();
if (labelCtx != null)
{
CurrentLabel = labelCtx.GetChild(0).NormalizeToken();
CurrentLabelColon = labelCtx.COLON() != null;
LabelSpan = new TextSpan(labelCtx.Start.StartIndex, labelCtx.Start.StopIndex + 1);
}
// --- Obtain line body/directive
var lineBodyCtx = context.lineBody();
if (lineBodyCtx != null)
{
// --- Special case, when a macro parameters is used as the main line
LastInstructionPos = lineBodyCtx.Stop.StopIndex;
var macroParamCtx = lineBodyCtx.macroParam();
if (macroParamCtx != null)
{
VisitMacroParam(macroParamCtx);
mainInstructionPart = new MacroParamLine(macroParamCtx.IDENTIFIER()?.NormalizeToken());
}
else
{
mainInstructionPart = VisitLineBody(context.lineBody());
}
}
else if (context.directive() != null)
{
mainInstructionPart = VisitDirective(context.directive());
}
// --- Obtain comment
if (context.comment() != null)
{
var commentCtx = context.comment();
CurrentComment = commentCtx.GetText();
CommentSpan = new TextSpan(commentCtx.Start.StartIndex, commentCtx.Stop.StopIndex + 1);
}
// --- Now, we have every part of the line, and create some special main instruction part
if (context.exception != null)
{
mainInstructionPart = new ParserErrorLine();
}
else if (mainInstructionPart == null && (CurrentLabel != null || CurrentComment != null))
{
mainInstructionPart = new NoInstructionLine();
if (CurrentLabel != null && !CurrentLabelColon)
{
var statementFound = true;
switch (CurrentLabel.ToLower())
{
case "continue":
mainInstructionPart = new ContinueStatement();
break;
case "break":
mainInstructionPart = new BreakStatement();
break;
case "endm":
case "mend":
mainInstructionPart = new MacroEndStatement();
break;
case "endl":
case "lend":
mainInstructionPart = new LoopEndStatement();
break;
case "proc":
mainInstructionPart = new ProcStatement();
break;
case "endp":
case "pend":
mainInstructionPart = new ProcEndStatement();
break;
case "repeat":
mainInstructionPart = new RepeatStatement();
break;
case "endw":
case "wend":
mainInstructionPart = new WhileEndStatement();
break;
case "ends":
mainInstructionPart = new StructEndStatement();
break;
case "else":
mainInstructionPart = new ElseStatement();
break;
case "endif":
mainInstructionPart = new IfEndStatement();
break;
default:
statementFound = false;
break;
}
if (statementFound)
{
KeywordSpan = new TextSpan(context.Start.StartIndex, context.Start.StopIndex + 1);
CurrentLabel = null;
}
}
}
return(mainInstructionPart is SourceLineBase sourceLine
? AddLine(sourceLine, context)
: mainInstructionPart);
}
public override object VisitAsmline(Z80AsmParser.AsmlineContext context)
{
CurrentLabel = null;
CurrentComment = null;
LabelSpan = null;
KeywordSpan = null;
CommentSpan = null;
IssueToEmit = null;
IsFieldAssignment = false;
NumberSpans = null;
IdentifierSpans = null;
StringSpans = null;
FunctionSpans = null;
SemiVarSpans = null;
MacroParamSpans = null;
MacroParamNames = null;
SemiVarSpans = null;
StatementSpans = null;
OperandSpans = null;
MnemonicSpans = null;
if (context?.Start == null || context.Stop == null)
{
return(null);
}
var startIndex = context.start.StartIndex;
var stopIndex = context.stop.StopIndex;
CurrentSourceText = InputStream.GetText(new Interval(startIndex, stopIndex));
CurrentSourceLine = context.Start.Line;
FirstColumn = context.Start.Column;
FirstPosition = context.Start.StartIndex;
LastPosition = context.Stop.StopIndex;
object mainInstructionPart = null;
// --- Obtain label
var labelCtx = context.label();
if (labelCtx != null)
{
CurrentLabel = labelCtx.GetChild(0).NormalizeToken();
LabelSpan = new TextSpan(labelCtx.Start.StartIndex, labelCtx.Start.StopIndex + 1);
}
// --- Obtain line body/directive
var lineBodyCtx = context.lineBody();
if (lineBodyCtx != null)
{
// --- Special case, when a macro parameters is used as the main line
LastInstructionPos = lineBodyCtx.Stop.StopIndex;
var macroParamCtx = lineBodyCtx.macroParam();
if (macroParamCtx != null)
{
VisitMacroParam(macroParamCtx);
mainInstructionPart = new MacroParamLine(macroParamCtx.IDENTIFIER()?.NormalizeToken());
}
else
{
mainInstructionPart = VisitLineBody(context.lineBody());
}
}
else if (context.directive() != null)
{
mainInstructionPart = VisitDirective(context.directive());
}
// --- Obtain comment
if (context.comment() != null)
{
var commentCtx = context.comment();
CurrentComment = commentCtx.GetText();
CommentSpan = new TextSpan(commentCtx.Start.StartIndex, commentCtx.Stop.StopIndex + 1);
}
// --- Now, we have every part of the line, and create some special main instruction part
if (context.exception != null)
{
mainInstructionPart = new ParserErrorLine();
}
else if (mainInstructionPart == null && (CurrentLabel != null || CurrentComment != null))
{
// --- Either a label only or a comment only line
mainInstructionPart = new NoInstructionLine();
}
return(mainInstructionPart is SourceLineBase sourceLine
? AddLine(sourceLine, context)
: mainInstructionPart);
}
/// <summary>
/// Visit a parse tree produced by <see cref="Z80AsmParser.asmline"/>.
/// <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 VisitAsmline([NotNull] Z80AsmParser.AsmlineContext context)
{
return(VisitChildren(context));
}
/// <summary>
/// Exit a parse tree produced by <see cref="Z80AsmParser.asmline"/>.
/// <para>The default implementation does nothing.</para>
/// </summary>
/// <param name="context">The parse tree.</param>
public virtual void ExitAsmline([NotNull] Z80AsmParser.AsmlineContext context)
{
}