protected override LiteralNode ParseLiteral(ILiteralNodeParent parent, Token token)
{
if ((parent is ArrayLiteralNode) && Parser.IsOpeningParenthesis(token))
{
// Stupid VSE allows declarations of arrays like: #( 1 2 ( 3 4 ) 5 6),
// which is identical to: #( 1 2 #( 3 4 ) 5 6).
// Only the inner (child) arrays may omit the hash prefix.
// Here we emulate this and create a 'fake' hash token.
// The fake hash token gets the same source positions and the parenthesis token.
SpecialCharacterToken hash = new SpecialCharacterToken(SemanticConstants.LiteralArrayPrefix);
hash.SetTokenValues(token.StartPosition, token.StopPosition, null);
this.ResidueToken = token;
return(this.ParseArrayLiteral(parent, hash));
}
if (!Parser.IsLiteralArrayPrefix(token))
{
return(base.ParseLiteral(parent, token));
}
Token token2 = this.GetNextTokenxx(Preference.Default);
if (VseCompatibleParser.IsOpeningByteArrayBracket(token2))
{
return(this.ParseByteArrayLiteral(parent, (SpecialCharacterToken)token, (SpecialCharacterToken)token2));
}
this.ResidueToken = token2;
return(base.ParseLiteral(parent, token));
}
/// <summary>
/// Initializes the node after being parsed by the parser.
/// </summary>
/// <param name="elements">Collection with literal nodes that compose the elements of the literal array.</param>
/// <param name="rightParenthesis">Closing right parenthesis of the literal array.</param>
protected internal void SetContents(IEnumerable <SmallIntegerLiteralNode> elements, SpecialCharacterToken rightBracket)
{
if (elements == null)
{
throw new ArgumentNullException("elements");
}
if ((rightBracket != null) && !VseCompatibleParser.IsClosingByteArrayBracket(rightBracket)) // NB: We allow null value.
{
throw new ArgumentException("rightBracket");
}
this.RightBracket = rightBracket;
foreach (SmallIntegerLiteralNode elem in elements)
{
this.Elements.Add(elem);
}
}
/// <summary>
/// Create and initialize a new literal array node.
/// </summary>
/// <param name="parent">Parent node that defines this literal node.</param>
/// <param name="arrayToken">Hash token that defines the start of array literals.</param>
/// <param name="leftParenthesis">Opening left parenthesis of the literal array.</param>
protected internal ByteArrayLiteralNode(ILiteralNodeParent parent, SpecialCharacterToken arrayToken,
SpecialCharacterToken leftBracket)
: base(parent)
{
#if DEBUG
if (!Parser.IsLiteralArrayPrefix(arrayToken))
{
throw new ArgumentException("arrayToken");
}
if (!VseCompatibleParser.IsOpeningByteArrayBracket(leftBracket))
{
throw new ArgumentException("leftBracket");
}
#endif
this.ArrayToken = arrayToken;
this.LeftBracket = leftBracket;
this.Elements = new List <SmallIntegerLiteralNode>();
}
private void ParseMethod(string src, int position, ref int processed, ref int errors)
{
if (String.IsNullOrWhiteSpace(src))
return;
StringReader reader = new StringReader(src);
bool ok = true;
string err = null;
try
{
Parser parser = new VseCompatibleParser();
this.Errors = new Dictionary<object, List<string>>();
parser.ErrorSink = this;
MethodNode node = parser.ParseMethod(reader);
ok = (this.Errors.Count == 0);
if (!ok)
err = "Errors: " + this.Errors.Count.ToString();
}
catch (Exception ex)
{
ok = false;
err = ex.Message;
}
if (!ok)
this.listErrors.Items.Add("Pos: " + position + ", " + err).Tag = src;
if (!ok)
errors++;
processed++;
}
protected ByteArrayLiteralNode ParseByteArrayLiteral(ILiteralNodeParent parent, SpecialCharacterToken arrayToken, SpecialCharacterToken leftBracket)
{
// PARSE: <array literal> ::= '#[' <number literal>* ']'
List <SmallIntegerLiteralNode> elements = new List <SmallIntegerLiteralNode>();
ByteArrayLiteralNode result = new ByteArrayLiteralNode(parent, arrayToken, leftBracket);
// Process tokens inside the array ...
while (true)
{
// ... get next token in the array ...
Token token = this.GetNextTokenxx(Preference.NegativeSign);
// Is this closing parenthesis?
if (VseCompatibleParser.IsClosingByteArrayBracket(token))
{
// Closing parenthesis ... done with the array, return litral array node.
result.SetContents(elements, (SpecialCharacterToken)token);
this.ResidueToken = null;
return(result);
}
if (token is EofToken)
{
// Unfinished source code ... return
result.SetContents(elements, null);
this.ReportParserError(parent, "Missing literal byte array closing bracket.", token);
this.ResidueToken = token;
return(result);
}
// PARSE: <numeric liteal>
if (token is SmallIntegerToken)
{
elements.Add(new SmallIntegerLiteralNode(result, (SmallIntegerToken)token, null));
}
else if (token is NegativeSignToken)
{
NegativeSignToken negativeSign = (NegativeSignToken)token;
token = this.GetNextTokenxx(Preference.NegativeSign);
if (token is SmallIntegerToken)
{
elements.Add(new SmallIntegerLiteralNode(result, (SmallIntegerToken)token, negativeSign));
}
else
{
this.ReportParserError(parent, "Unrecognized literal.", token);
this.ResidueToken = token;
result.SetContents(elements, null);
return(result);
}
}
else
{
this.ReportParserError(parent, "Unrecognized literal.", token);
this.ResidueToken = token;
result.SetContents(elements, null);
return(result);
}
}
}
