public virtual Expression VisitExpressionSnippet(ExpressionSnippet snippet, ExpressionSnippet changes, ExpressionSnippet deletions, ExpressionSnippet insertions){
this.UpdateSourceContext(snippet, changes);
if (snippet == null) return changes;
if (changes != null){
if (deletions == null || insertions == null)
Debug.Assert(false);
else{
}
}else if (deletions != null)
return null;
return snippet;
}
public override Expression VisitExpressionSnippet(ExpressionSnippet snippet){
if (snippet == null) return null;
Document doc = snippet.SourceContext.Document;
if (doc == null) return null;
string fileName = doc.Name;
int lineNumber = doc.LineNumber;
DocumentText sourceText = doc.Text;
IParserFactory pf = snippet.ParserFactory;
IParser p;
if (pf == null)
p = this.DefaultParserFactory.CreateParser(fileName, lineNumber, sourceText, this.SymbolTable, this.ErrorNodes, this.Options);
else
p = pf.CreateParser(fileName, lineNumber, sourceText, this.SymbolTable, this.ErrorNodes, this.Options);
if (p == null) return null;
return p.ParseExpression();
}
public virtual Differences VisitExpressionSnippet(ExpressionSnippet snippet1, ExpressionSnippet snippet2){
Differences differences = new Differences(snippet1, snippet2);
if (snippet1 == null || snippet2 == null){
if (snippet1 != snippet2) differences.NumberOfDifferences++; else differences.NumberOfSimilarities++;
return differences;
}
ExpressionSnippet changes = (ExpressionSnippet)snippet2.Clone();
ExpressionSnippet deletions = (ExpressionSnippet)snippet2.Clone();
ExpressionSnippet insertions = (ExpressionSnippet)snippet2.Clone();
if (snippet1.SourceContext.Document == null || snippet2.SourceContext.Document == null){
if (snippet1.SourceContext.Document == snippet2.SourceContext.Document) differences.NumberOfSimilarities++; else differences.NumberOfDifferences++;
}else if (snippet1.SourceContext.Document.Name == snippet2.SourceContext.Document.Name)
differences.NumberOfSimilarities++; else differences.NumberOfDifferences++;
if (differences.NumberOfDifferences == 0){
differences.Changes = null;
differences.Deletions = null;
differences.Insertions = null;
}else{
differences.Changes = changes;
differences.Deletions = deletions;
differences.Insertions = insertions;
}
return differences;
}
public override Expression VisitExpressionSnippet(ExpressionSnippet snippet)
{
throw new ApplicationException("unimplemented");
}
public virtual Expression VisitExpressionSnippet(ExpressionSnippet snippet){
return snippet;
}
public override Expression VisitExpressionSnippet(ExpressionSnippet snippet)
{
if (snippet == null) return null;
return base.VisitExpressionSnippet((ExpressionSnippet)snippet.Clone());
}
public virtual Expression VisitExpressionSnippet(ExpressionSnippet snippet1, ExpressionSnippet snippet2)
{
return snippet1;
}
private Expression Translate(CodeSnippetExpression expr){
if (expr == null) return null;
ExpressionSnippet snippet = new ExpressionSnippet();
Document doc = this.compiler.CreateDocument(null, 1, expr.Value);
snippet.SourceContext = new SourceContext(doc);
return snippet;
}
public override Expression VisitExpressionSnippet(ExpressionSnippet snippet)
{
System.Compiler.Parser p = this.DefaultCompiler.CreateParser(snippet.SourceContext.Document, this.ErrorNodes);
return(p.ParseExpression());
}
public override Expression VisitExpressionSnippet(ExpressionSnippet snippet)
{
throw new ApplicationException("unimplemented");
}
