public Task ParseAsync(IReadOnlyList <CodeDocument> codes, IReadOnlyList <object> windows)
{
return(Task.Run(() =>
{
AlgorithmProgram = null;
Error = null;
_syntaxTreeBuilder = new SyntaxTreeBuilder();
try
{
foreach (var code in codes)
{
_languageParser.Reset();
_syntaxTreeBuilder.Reset();
_lexer.Initialize(code.DocumentName, code.Code);
var nextExpectedToken = TokenType.Unknow;
var previousLineNumber = 1;
var previousLinePosition = 0;
while (_lexer.Next())
{
if (nextExpectedToken != TokenType.Unknow && _lexer.CurrentTokenDefinition.Token != nextExpectedToken)
{
throw new SyntaxErrorException(code.DocumentName, _lexer.CurrentLineNumber, _lexer.CurrentLinePosition, $"A {nextExpectedToken.GetDescription()} is expected.");
}
nextExpectedToken = TokenType.Unknow;
if (_lexer.CurrentTokenDefinition.Evaluator != null)
{
var evaluatorResult = _lexer.CurrentTokenDefinition.Evaluator(_lexer.CurrentTokenContents, _lexer.CurrentSplittedTokenContents, new EvaluatorArgument(code.DocumentName, previousLineNumber, previousLinePosition));
if (evaluatorResult != null)
{
nextExpectedToken = evaluatorResult.NextExpectedToken;
_syntaxTreeBuilder.BuildSyntaxTree(new SyntaxTreeBuilderArgument(code.DocumentName, previousLineNumber, previousLinePosition, evaluatorResult));
}
}
previousLineNumber = _lexer.CurrentLineNumber;
previousLinePosition = _lexer.CurrentLinePosition;
}
}
AlgorithmProgram = _syntaxTreeBuilder.AlgorithmProgram;
}
catch (SyntaxErrorException syntaxErrorException)
{
AlgorithmProgram = null;
Error = syntaxErrorException;
}
_syntaxTreeBuilder.Dispose();
_syntaxTreeBuilder = null;
if (ParsingCompleted != null)
{
ParsingCompleted(this, new EventArgs());
}
}));
}
