public Scanner(Parsers.Position initialPosition, TextReader /*!*/ reader, SourceUnit /*!*/ sourceUnit,
ErrorSink /*!*/ errors, ICommentsSink commentsSink, LanguageFeatures features)
: base(reader)
{
if (reader == null)
{
throw new ArgumentNullException("reader");
}
if (sourceUnit == null)
{
throw new ArgumentNullException("sourceUnit");
}
if (errors == null)
{
throw new ArgumentNullException("errors");
}
this.lineShift = initialPosition.FirstLine;
this.columnShift = initialPosition.FirstColumn;
this.offsetShift = initialPosition.FirstOffset;
this.errors = errors;
this.commentsSink = commentsSink ?? new _NullCommentsSink();
this.features = features;
this.sourceUnit = sourceUnit;
this.streamOffset = 0;
this.pure = sourceUnit.CompilationUnit.IsPure;
this.encoding = sourceUnit.Encoding;
AllowAspTags = (features & LanguageFeatures.AspTags) != 0;
AllowShortTags = (features & LanguageFeatures.ShortOpenTags) != 0;
}
/// <summary>
/// Keeps stream open.
/// </summary>
/// <exception cref="InvalidSourceException">Source file cannot be opened for reading.</exception>
public override void Parse(ErrorSink /*!*/ errors, IReductionsSink /*!*/ reductionsSink,
Parsers.Position initialPosition, LanguageFeatures features)
{
Parser parser = new Parser();
StreamReader source_reader;
try
{
stream = new FileStream(sourceFile.FullPath, FileMode.Open, FileAccess.Read, FileShare.Read);
source_reader = new StreamReader(stream, encoding, true);
// if the file contains a byte-order-mark, we must advance the offset in order to
// get correct token positions in lexer (unfortunately, StreamReader skips BOM without
// a possibility to detect it from outside, so we have to do that manually):
// TODO:
// initialPosition.FirstOffset += FileSystemUtils.GetByteOrderMarkLength(stream);
}
catch (Exception e)
{
throw new InvalidSourceException(sourceFile.FullPath, e);
}
ast = parser.Parse(this, source_reader, errors, reductionsSink, initialPosition,
Lexer.LexicalStates.INITIAL, features);
}
public GlobalCode Parse(SourceUnit /*!*/ sourceUnit, TextReader /*!*/ reader, ErrorSink /*!*/ errors,
IReductionsSink reductionsSink, Parsers.Position initialPosition, Lexer.LexicalStates initialLexicalState,
LanguageFeatures features)
{
Debug.Assert(reader != null && errors != null);
// initialization:
this.sourceUnit = sourceUnit;
this.errors = errors;
this.features = features;
this.reader = reader;
this.reductionsSink = reductionsSink ?? NullReductionSink;
InitializeFields();
this.scanner = new Scanner(initialPosition, reader, sourceUnit, errors, reductionsSink as ICommentsSink, features);
this.scanner.CurrentLexicalState = initialLexicalState;
this.currentScope = new Scope(1); // starts assigning scopes from 2 (1 is reserved for prepended inclusion)
this.unicodeSemantics = (features & LanguageFeatures.UnicodeSemantics) != 0;
base.Scanner = this.scanner;
base.Parse();
GlobalCode result = astRoot;
// clean and let GC collect unused AST and other stuff:
ClearFields();
return(result);
}
public void OnCloseTag(Scanner scanner, Parsers.Position position)
{
}
public void OnOpenTag(Scanner scanner, Parsers.Position position)
{
}
public void OnComment(Scanner scanner, Parsers.Position position)
{
}
public abstract void Parse(ErrorSink /*!*/ errors, IReductionsSink /*!*/ reductionsSink,
Parsers.Position initialPosition, LanguageFeatures features);