public Void VisitSequentialCommand(SequentialCommand ast, Frame frame)
{
ast.FirstCommand.Visit(this, frame);
ast.SecondCommand.Visit(this, frame);
return(null);
}
///////////////////////////////////////////////////////////////////////////////
//
// COMMANDS
//
///////////////////////////////////////////////////////////////////////////////
/// <summary>
/// Parses the command, and constructs an AST to represent its phrase
/// structure.
/// </summary>
/// <returns>
/// a <link>Triangle.SyntaxTrees.Commands.Command</link>
/// </returns>
/// <throws type="SyntaxError">
/// a syntactic error
/// </throws>
Command ParseCommand()
{
var startLocation = _currentToken.Start;
var command = ParseSingleCommand();
while (_currentToken.Kind == TokenKind.Semicolon)
{
AcceptIt();
var command2 = ParseSingleCommand();
var commandPosition = new SourcePosition(startLocation, _currentToken.Finish);
command = new SequentialCommand(command, command2, commandPosition);
}
return(command);
}
///////////////////////////////////////////////////////////////////////////////
// COMMANDS
///////////////////////////////////////////////////////////////////////////////
/// Parses the command, and constructs an AST to represent its phrase structure.
/// @return a <link>Triangle.SyntaxTrees.Commands.Command</link>
/// @throw SyntaxError
private Command ParseCommand()
{
Compiler.WriteDebuggingInfo("Parsing Command");
Location startLocation = tokens.Current.Start;
Command command = ParseSingleCommand();
while (tokens.Current.Kind == TokenKind.Semicolon)
{
AcceptIt();
Command command2 = ParseSingleCommand();
SourcePosition commandPosition = new SourcePosition(startLocation, tokens.Current.Finish);
command = new SequentialCommand(command, command2, commandPosition);
}
return(command);
}
public Void VisitSequentialCommand(SequentialCommand ast, Void arg)
{
ast.FirstCommand.Visit(this);
ast.SecondCommand.Visit(this);
return(null);
}
public Void VisitSequentialCommand(SequentialCommand ast, Void arg)
{
System.Console.WriteLine("Visiting SequentialCommand");
ast.FirstCommand.Visit(this, null);
return(ast.SecondCommand.Visit(this, null));
}
