/// <summary>
/// Returns a visitor with the results of a single parsing pass
/// </summary>
/// <param name="textToParse">Z80 assembly code to parse</param>
/// <returns>
/// Visitor with the syntax tree
/// </returns>
protected virtual List <Z80TestParserErrorInfo> ParseWithErrors(string textToParse)
{
var inputStream = new AntlrInputStream(textToParse);
var lexer = new Z80TestLexer(inputStream);
var tokenStream = new CommonTokenStream(lexer);
var parser = new Z80TestParser(tokenStream);
var context = parser.compileUnit();
var visitor = new Z80TestVisitor();
visitor.Visit(context);
return(parser.SyntaxErrors);
}
/// <summary>
/// Returns a visitor with the results of a single parsing pass
/// </summary>
/// <param name="textToParse">Z80 assembly code to parse</param>
/// <param name="expectedErrors">Number of errors expected</param>
/// <returns>
/// Visitor with the syntax tree
/// </returns>
protected virtual Z80TestVisitor Parse(string textToParse, int expectedErrors = 0)
{
var inputStream = new AntlrInputStream(textToParse);
var lexer = new Z80TestLexer(inputStream);
var tokenStream = new CommonTokenStream(lexer);
var parser = new Z80TestParser(tokenStream);
var context = parser.compileUnit();
var visitor = new Z80TestVisitor();
visitor.Visit(context);
parser.SyntaxErrors.Count.ShouldBe(expectedErrors);
return(visitor);
}
/// <summary>
/// Executes the parse phase of the compilation
/// </summary>
/// <param name="plan">Test plan</param>
/// <param name="sourcetext">Source text</param>
/// <param name="testSetNodes">TestSetNode as the result of compilation</param>
/// <returns>True, if compilation successful; otherwise, false</returns>
private bool ExecuteParse(TestFilePlan plan, string sourcetext, out List <TestSetNode> testSetNodes)
{
// --- Parse the source text
var inputStream = new AntlrInputStream(sourcetext);
var lexer = new Z80TestLexer(inputStream);
var tokenStream = new CommonTokenStream(lexer);
var parser = new Z80TestParser(tokenStream);
var context = parser.compileUnit();
var visitor = new Z80TestVisitor();
visitor.Visit(context);
testSetNodes = visitor.Compilation.TestSets;
// --- Collect syntax errors
foreach (var error in parser.SyntaxErrors)
{
ReportError(plan, error);
}
return(parser.SyntaxErrors.Count == 0);
}
/// <summary>
/// Parses the entire source code
/// </summary>
private async void ParseDocument()
{
// --- Do not start parsing over existing parsing
if (_isProcessing)
{
return;
}
_isProcessing = true;
await Task.Run(() =>
{
try
{
// --- Get the entire text of the source code
var span = new SnapshotSpan(_buffer.CurrentSnapshot, 0, _buffer.CurrentSnapshot.Length);
var source = _buffer.CurrentSnapshot.GetText(span);
// --- Let's use the Z80 assembly parser to obtain tags
var inputStream = new AntlrInputStream(source);
var lexer = new Z80TestLexer(inputStream);
var tokenStream = new CommonTokenStream(lexer);
var parser = new Z80TestParser(tokenStream);
var context = parser.compileUnit();
var commentWalker = new ParseTreeWalker();
var parserListener = new Z80TestParserListener(tokenStream);
commentWalker.Walk(parserListener, context);
_commentSpans = parserListener.CommentSpans;
_z80TestVisitor = new Z80TestVisitor();
_z80TestVisitor.Visit(context);
// --- Code is parsed, sign the change
ClassificationChanged?.Invoke(this, new ClassificationChangedEventArgs(span));
}
finally
{
_isProcessing = false;
}
});
}
/// <summary>Gets all the tags that intersect the specified spans. </summary>
/// <returns>A <see cref="T:Microsoft.VisualStudio.Text.Tagging.TagSpan`1" /> for each tag.</returns>
/// <param name="spans">The spans to visit.</param>
public IEnumerable <ITagSpan <Z80TestTokenTag> > GetTags(NormalizedSnapshotSpanCollection spans)
{
// --- Just for the sake of being thorough...
if (spans.Count <= 0)
{
yield break;
}
// --- Obtain and parse the entire snapshot
var snapshot = spans[0].Snapshot;
var source = snapshot.GetText();
var inputStream = new AntlrInputStream(source);
var lexer = new Z80TestLexer(inputStream);
var tokenStream = new CommonTokenStream(lexer);
var parser = new Z80TestParser(tokenStream);
var context = parser.compileUnit();
var visitor = new Z80TestVisitor();
visitor.Visit(context);
foreach (var curSpan in spans)
{
var currentLine = curSpan.Start.GetContainingLine();
var lineNo = currentLine.LineNumber;
var textOfLine = currentLine.GetText();
if (string.IsNullOrWhiteSpace(textOfLine))
{
continue;
}
var collectedSpans = new List <TagSpan <Z80TestTokenTag> >();
Visit(currentLine, visitor.Compilation, lineNo + 1, collectedSpans);
foreach (var span in collectedSpans)
{
yield return(span);
}
}
}