public virtual T applyToVerticalBarToken(VerticalBarToken operand)
{
return(applyToParseTreeNode(operand));
}
/// <summary>
/// Initializes the node after being parsed by the parser.
/// </summary>
/// <param name="arguments">Collection of block arguments for this block.</param>
/// <param name="argumentsBar">The vertical bar after the block arguments.</param>
/// <param name="leftBar">Left vertical bar "|" token, if temporary variable definition is present.</param>
/// <param name="temporaries">A collection of temporary variable nodes.</param>
/// <param name="rightBar">Right vertical bar "|" token, if temporary variable definition is present.</param>
/// <param name="statements">Executable statements defining the function.</param>
/// <param name="rightBracket">Token for the right / closing square bracket of the block.</param>
protected internal void SetContents(IEnumerable <BlockArgumentNode> arguments, VerticalBarToken argumentsBar,
VerticalBarToken leftBar, IEnumerable <TemporaryVariableNode> temporaries, VerticalBarToken rightBar,
StatementNode statements, SpecialCharacterToken rightBracket)
{
if (arguments == null)
{
throw new ArgumentNullException("arguments");
}
this.SetContents(leftBar, temporaries, rightBar, statements);
this.Arguments.Clear();
this.Arguments.AddRange(arguments);
this.ArgumentsBar = argumentsBar; // OK with null if no arguments or illegal source
this.RightBracket = rightBracket; // OK with null if illegal source
}
protected virtual BlockNode ParseBlock(IPrimaryParentNode parent, SpecialCharacterToken leftBracket)
{
// PARSE: <block constructor> ::= '[' <block body> ']'
// <block body> ::= [<block argument>* '|'] [<temporaries>] [<statements>]
// <block argument> ::= ':' identifier
BlockNode result = new BlockNode(parent, leftBracket);
// PARSE: [<block argument>* '|']
// ISSUE: It this a bug in X3J20. Shouldn't it be: [<block argument>+ '|']
// The current definition allows blocks like: [ | ] ... or ... [ | self doStuff ] ... or ... [ | | temp | temp := self something ]
// We assume X3J20 bug and expect: [<block argument>+ '|']
VerticalBarToken argumentsBar = null;
List <BlockArgumentNode> arguments = new List <BlockArgumentNode>();
Token token = this.GetNextTokenxx(Preference.VerticalBar | Preference.NegativeSign);
// Check if the block has arguments
if (Parser.IsBlockArgumentPrefix(token))
{
// ... yes arguments ... parse them ...
while (true)
{
if (Parser.IsBlockArgumentPrefix(token))
{
// <block argument>
arguments.Add(this.ParseBlockArgument(result, (SpecialCharacterToken)token));
}
else if (token is VerticalBarToken)
{
// The '|' after the arguments.
argumentsBar = (VerticalBarToken)token;
token = this.GetNextTokenxx(Preference.NegativeSign | Preference.VerticalBar);
break; // Done with block arguments
}
else
{
this.ReportParserError(result, SemanticErrors.MissingBlockClosingArgsBar, token);
break;
}
// Get the next token
token = this.GetNextTokenxx(Preference.VerticalBar | Preference.NegativeSign);
}
}
// PARSE: [<temporaries>]
ParseTemporariesResult ptr = this.ParseTemporaries(result, token);
// PARSE: <statements>
token = this.GetNextTokenxx(Preference.NegativeSign);
StatementNode statements = this.ParseStatement(result, token);
// Ensure the block is properly closed.
SpecialCharacterToken rightBracket = null;
token = this.GetNextTokenxx(Preference.Default);
if (!Parser.IsBlockEndDelimiter(token))
{
this.ReportParserError(result, SemanticErrors.MissingBlockClosingBracket, token);
this.ResidueToken = token;
}
else
{
rightBracket = (SpecialCharacterToken)token;
}
result.SetContents(arguments, argumentsBar, ptr.LeftBar, ptr.Temporaries, ptr.RightBar, statements, rightBracket);
return(result);
}
/// <summary>
/// Initializes the node after being parsed by the parser.
/// </summary>
/// <param name="leftBar">Left vertical bar "|" token, if temporary variable definition is present.</param>
/// <param name="temporaries">A collection of temporary variable nodes.</param>
/// <param name="rightBar">Right vertical bar "|" token, if temporary variable definition is present.</param>
/// <param name="statements">Executable statements defining the function.</param>
protected internal void SetContents(VerticalBarToken leftBar, IEnumerable <TemporaryVariableNode> temporaries, VerticalBarToken rightBar, StatementNode statements)
{
this.Temporaries.Clear();
if (temporaries != null)
{
this.Temporaries.AddRange(temporaries);
}
this.LeftBar = leftBar; // Null if no temporaries
this.RightBar = rightBar; // Null if no temporaries or illegal source code
this.Statements = statements; // OK with null
if ((this.Temporaries.Count != 0) && (this.LeftBar == null))
{
throw new ArgumentNullException("leftBar"); // Little late, but OK to throw the exception.
}
}
