public bool TryParseNode(Genero4glParser parser,
out FglStatement node,
IModuleResult containingModule,
List <Func <PrepareStatement, bool> > prepStatementBinders,
Func <ReturnStatement, ParserResult> returnStatementBinder = null,
Action <IAnalysisResult, int, int> limitedScopeVariableAdder = null,
bool returnStatementsOnly = false,
List <TokenKind> validExitKeywords = null,
IEnumerable <ContextStatementFactory> contextStatementFactories = null,
ExpressionParsingOptions expressionOptions = null,
HashSet <TokenKind> endKeywords = null)
{
node = null;
bool result = false;
if (returnStatementsOnly)
{
if (parser.PeekToken(TokenKind.ReturnKeyword))
{
ReturnStatement retStmt;
if ((result = ReturnStatement.TryParseNode(parser, out retStmt)))
{
node = retStmt;
}
}
return(result);
}
if (contextStatementFactories != null)
{
foreach (var context in contextStatementFactories)
{
node = context(parser);
if (node != null)
{
break;
}
}
if (node != null)
{
return(true);
}
}
switch (parser.PeekToken().Kind)
{
case TokenKind.LetKeyword:
{
LetStatement letStmt;
if ((result = LetStatement.TryParseNode(parser, out letStmt, expressionOptions)))
{
node = letStmt;
}
break;
}
case TokenKind.DeclareKeyword:
{
DeclareStatement declStmt;
if ((result = DeclareStatement.TryParseNode(parser, out declStmt, containingModule)))
{
node = declStmt;
}
break;
}
case TokenKind.DeferKeyword:
{
DeferStatementNode deferStmt;
if ((result = DeferStatementNode.TryParseNode(parser, out deferStmt)))
{
node = deferStmt;
}
break;
}
case TokenKind.PrepareKeyword:
{
PrepareStatement prepStmt;
if ((result = PrepareStatement.TryParseNode(parser, out prepStmt, containingModule)))
{
node = prepStmt;
foreach (var binder in prepStatementBinders)
{
if (binder(prepStmt))
{
break;
}
}
}
break;
}
case TokenKind.SqlKeyword:
{
SqlBlockNode sqlStmt;
if ((result = SqlBlockNode.TryParseSqlNode(parser, out sqlStmt)))
{
node = sqlStmt;
}
break;
}
case TokenKind.ReturnKeyword:
{
ReturnStatement retStmt;
if ((result = ReturnStatement.TryParseNode(parser, out retStmt)))
{
if (returnStatementBinder != null)
{
var parseResult = returnStatementBinder(retStmt);
if (!parseResult.Success && !string.IsNullOrWhiteSpace(parseResult.ErrorMessage))
{
parser.ReportSyntaxError(parseResult.ErrorMessage);
}
}
node = retStmt;
}
break;
}
case TokenKind.CallKeyword:
{
CallStatement callStmt;
if ((result = CallStatement.TryParseNode(parser, out callStmt)))
{
node = callStmt;
}
break;
}
case TokenKind.IfKeyword:
{
IfStatement ifStmt;
if ((result = IfStatement.TryParseNode(parser, out ifStmt, containingModule, prepStatementBinders, returnStatementBinder,
limitedScopeVariableAdder, validExitKeywords, contextStatementFactories, expressionOptions, endKeywords)))
{
node = ifStmt;
}
break;
}
case TokenKind.WhileKeyword:
{
WhileStatement whileStmt;
if ((result = WhileStatement.TryParseNode(parser, out whileStmt, containingModule, prepStatementBinders, returnStatementBinder,
limitedScopeVariableAdder, validExitKeywords, contextStatementFactories, expressionOptions, endKeywords)))
{
node = whileStmt;
}
break;
}
case TokenKind.ExitKeyword:
{
ExitStatement exitStatement;
if ((result = ExitStatement.TryParseNode(parser, out exitStatement)))
{
node = exitStatement;
}
break;
}
case TokenKind.ContinueKeyword:
{
ContinueStatement contStmt;
if ((result = ContinueStatement.TryParseNode(parser, out contStmt)))
{
node = contStmt;
}
break;
}
case TokenKind.WheneverKeyword:
{
WheneverStatement wheneverStmt;
if ((result = WheneverStatement.TryParseNode(parser, out wheneverStmt)))
{
node = wheneverStmt;
}
break;
}
case TokenKind.ForKeyword:
{
ForStatement forStmt;
if ((result = ForStatement.TryParserNode(parser, out forStmt, containingModule, prepStatementBinders, returnStatementBinder,
limitedScopeVariableAdder, validExitKeywords, contextStatementFactories, expressionOptions, endKeywords)))
{
node = forStmt;
}
break;
}
case TokenKind.CaseKeyword:
{
CaseStatement caseStmt;
if ((result = CaseStatement.TryParseNode(parser, out caseStmt, containingModule, prepStatementBinders, returnStatementBinder,
limitedScopeVariableAdder, validExitKeywords, contextStatementFactories, expressionOptions, endKeywords)))
{
node = caseStmt;
}
break;
}
case TokenKind.InitializeKeyword:
{
InitializeStatement initStmt;
if ((result = InitializeStatement.TryParseNode(parser, out initStmt)))
{
node = initStmt;
}
break;
}
case TokenKind.LocateKeyword:
{
LocateStatement locateStmt;
if ((result = LocateStatement.TryParseNode(parser, out locateStmt)))
{
node = locateStmt;
}
break;
}
case TokenKind.FreeKeyword:
{
FreeStatement freeStmt;
if ((result = FreeStatement.TryParseNode(parser, out freeStmt)))
{
node = freeStmt;
}
break;
}
case TokenKind.GotoKeyword:
{
GotoStatement gotoStmt;
if ((result = GotoStatement.TryParseNode(parser, out gotoStmt)))
{
node = gotoStmt;
}
break;
}
case TokenKind.LabelKeyword:
{
LabelStatement labelStmt;
if ((result = LabelStatement.TryParseNode(parser, out labelStmt)))
{
node = labelStmt;
}
break;
}
case TokenKind.SleepKeyword:
{
SleepStatement sleepStmt;
if ((result = SleepStatement.TryParseNode(parser, out sleepStmt)))
{
node = sleepStmt;
}
break;
}
case TokenKind.TryKeyword:
{
TryCatchStatement tryStmt;
if ((result = TryCatchStatement.TryParseNode(parser, out tryStmt, containingModule, prepStatementBinders, returnStatementBinder,
limitedScopeVariableAdder, validExitKeywords, contextStatementFactories, endKeywords)))
{
node = tryStmt;
}
break;
}
case TokenKind.ValidateKeyword:
{
ValidateStatement validateStmt;
if ((result = ValidateStatement.TryParseNode(parser, out validateStmt)))
{
node = validateStmt;
}
break;
}
case TokenKind.OptionsKeyword:
{
OptionsStatement optionsStmt;
if ((result = OptionsStatement.TryParseNode(parser, out optionsStmt)))
{
node = optionsStmt;
}
break;
}
case TokenKind.ExecuteKeyword:
{
ExecuteStatement exeStmt;
if ((result = ExecuteStatement.TryParseNode(parser, out exeStmt)))
{
node = exeStmt;
}
break;
}
case TokenKind.OpenKeyword:
{
OpenStatement openStmt;
if ((result = OpenStatement.TryParseNode(parser, out openStmt)))
{
node = openStmt;
}
break;
}
case TokenKind.FetchKeyword:
{
FetchStatement fetchStmt;
if ((result = FetchStatement.TryParseNode(parser, out fetchStmt)))
{
node = fetchStmt;
}
break;
}
case TokenKind.CloseKeyword:
{
CloseStatement closeStmt;
if ((result = CloseStatement.TryParseNode(parser, out closeStmt)))
{
node = closeStmt;
}
break;
}
case TokenKind.ClearKeyword:
{
ClearStatement clearStmt;
if ((result = ClearStatement.TryParseNode(parser, out clearStmt)))
{
node = clearStmt;
}
break;
}
case TokenKind.ForeachKeyword:
{
ForeachStatement foreachStmt;
if ((result = ForeachStatement.TryParseNode(parser, out foreachStmt, containingModule, prepStatementBinders, returnStatementBinder,
limitedScopeVariableAdder, validExitKeywords, contextStatementFactories, endKeywords)))
{
node = foreachStmt;
}
break;
}
case TokenKind.MessageKeyword:
{
MessageStatement msgStmt;
if ((result = MessageStatement.TryParseNode(parser, out msgStmt)))
{
node = msgStmt;
}
break;
}
case TokenKind.MenuKeyword:
{
MenuBlock menuStmt;
if ((result = MenuBlock.TryParseNode(parser, out menuStmt, containingModule, prepStatementBinders, returnStatementBinder,
limitedScopeVariableAdder, validExitKeywords, contextStatementFactories, endKeywords)))
{
node = menuStmt;
if (limitedScopeVariableAdder != null)
{
limitedScopeVariableAdder(Genero4glAst.DialogVariable, node.StartIndex, node.EndIndex);
}
}
break;
}
case TokenKind.InputKeyword:
{
InputBlock inputStmt;
if ((result = InputBlock.TryParseNode(parser, out inputStmt, containingModule, prepStatementBinders, returnStatementBinder,
limitedScopeVariableAdder, validExitKeywords, contextStatementFactories, endKeywords)))
{
node = inputStmt;
if (limitedScopeVariableAdder != null)
{
limitedScopeVariableAdder(Genero4glAst.DialogVariable, node.StartIndex, node.EndIndex);
}
}
break;
}
case TokenKind.ConstructKeyword:
{
ConstructBlock constructStmt;
if ((result = ConstructBlock.TryParseNode(parser, out constructStmt, containingModule, prepStatementBinders, returnStatementBinder,
limitedScopeVariableAdder, validExitKeywords, contextStatementFactories, endKeywords)))
{
node = constructStmt;
if (limitedScopeVariableAdder != null)
{
limitedScopeVariableAdder(Genero4glAst.DialogVariable, node.StartIndex, node.EndIndex);
}
}
break;
}
case TokenKind.FlushKeyword:
{
FlushStatement flushStmt;
if ((result = FlushStatement.TryParseNode(parser, out flushStmt)))
{
node = flushStmt;
}
break;
}
case TokenKind.DisplayKeyword:
{
DisplayBlock dispStmt;
if ((result = DisplayBlock.TryParseNode(parser, out dispStmt, containingModule, prepStatementBinders, returnStatementBinder,
limitedScopeVariableAdder, validExitKeywords, contextStatementFactories, endKeywords)))
{
node = dispStmt;
if (limitedScopeVariableAdder != null)
{
limitedScopeVariableAdder(Genero4glAst.DialogVariable, node.StartIndex, node.EndIndex);
}
}
break;
}
case TokenKind.PromptKeyword:
{
PromptStatement promptStmt;
if ((result = PromptStatement.TryParseNode(parser, out promptStmt, containingModule, prepStatementBinders, returnStatementBinder,
limitedScopeVariableAdder, validExitKeywords, contextStatementFactories, endKeywords)))
{
node = promptStmt;
if (limitedScopeVariableAdder != null)
{
limitedScopeVariableAdder(Genero4glAst.DialogVariable, node.StartIndex, node.EndIndex);
}
}
break;
}
case TokenKind.DialogKeyword:
{
DialogBlock dialogBlock;
if ((result = DialogBlock.TryParseNode(parser, out dialogBlock, containingModule, prepStatementBinders, returnStatementBinder,
limitedScopeVariableAdder, validExitKeywords, contextStatementFactories, endKeywords)))
{
node = dialogBlock;
if (limitedScopeVariableAdder != null)
{
limitedScopeVariableAdder(Genero4glAst.DialogVariable, node.StartIndex, node.EndIndex);
}
}
break;
}
case TokenKind.AcceptKeyword:
{
AcceptStatement acceptStmt;
if ((result = AcceptStatement.TryParseNode(parser, out acceptStmt)))
{
node = acceptStmt;
}
break;
}
case TokenKind.LoadKeyword:
{
LoadStatement loadStmt;
if ((result = LoadStatement.TryParseNode(parser, out loadStmt)))
{
node = loadStmt;
}
break;
}
case TokenKind.CreateKeyword:
{
CreateStatement createStmt;
if ((result = CreateStatement.TryParseNode(parser, out createStmt, containingModule)))
{
node = createStmt;
}
break;
}
case TokenKind.BreakpointKeyword:
{
BreakpointStatement brkStmt;
if ((result = BreakpointStatement.TryParseNode(parser, out brkStmt)))
{
node = brkStmt;
}
break;
}
case TokenKind.OutputKeyword:
{
OutputToReportStatement outRpt;
if ((result = OutputToReportStatement.TryParseNode(parser, out outRpt)))
{
node = outRpt;
}
break;
}
case TokenKind.StartKeyword:
{
StartReportStatement startRpt;
if ((result = StartReportStatement.TryParseNode(parser, out startRpt)))
{
node = startRpt;
}
break;
}
case TokenKind.FinishKeyword:
{
FinishReportStatement finRpt;
if ((result = FinishReportStatement.TryParseNode(parser, out finRpt)))
{
node = finRpt;
}
break;
}
case TokenKind.TerminateKeyword:
{
TerminateReportStatement termRpt;
if ((result = TerminateReportStatement.TryParseNode(parser, out termRpt)))
{
node = termRpt;
}
break;
}
default:
{
if (SqlStatementFactory.IsValidStatementStart(parser.PeekToken().Kind))
{
bool dummy;
result = SqlStatementFactory.TryParseSqlStatement(parser, out node, out dummy);
}
break;
}
}
if (result)
{
// check for semicolon
if (parser.PeekToken(TokenKind.Semicolon))
{
parser.NextToken();
}
}
return(result);
}
public static bool TryParseNode(Genero4glParser parser, out MenuBlock node,
IModuleResult containingModule,
List <Func <PrepareStatement, bool> > prepStatementBinders,
Func <ReturnStatement, ParserResult> returnStatementBinder = null,
Action <IAnalysisResult, int, int> limitedScopeVariableAdder = null,
List <TokenKind> validExitKeywords = null,
IEnumerable <ContextStatementFactory> contextStatementFactories = null,
HashSet <TokenKind> endKeywords = null)
{
node = null;
bool result = false;
if (parser.PeekToken(TokenKind.MenuKeyword))
{
result = true;
node = new MenuBlock();
parser.NextToken();
node.StartIndex = parser.Token.Span.Start;
node.Attributes = new List <ExpressionNode>();
if (parser.PeekToken(TokenCategory.StringLiteral))
{
parser.NextToken();
node.MenuTitle = parser.Token.Token.Value.ToString();
}
node.DecoratorEnd = parser.Token.Span.End;
if (parser.PeekToken(TokenKind.AttributesKeyword) ||
parser.PeekToken(TokenKind.AttributeKeyword))
{
parser.NextToken();
if (parser.PeekToken(TokenKind.LeftParenthesis))
{
parser.NextToken();
ExpressionNode expr;
while (FglExpressionNode.TryGetExpressionNode(parser, out expr, new List <TokenKind> {
TokenKind.Comma, TokenKind.RightParenthesis
}))
{
node.Attributes.Add(expr);
if (!parser.PeekToken(TokenKind.Comma))
{
break;
}
parser.NextToken();
}
if (parser.PeekToken(TokenKind.RightParenthesis))
{
parser.NextToken();
}
else
{
parser.ReportSyntaxError("Expecting right-paren for menu attributes.");
}
}
else
{
parser.ReportSyntaxError("Expecting left-paren for menu attributes.");
}
}
List <TokenKind> validExits = new List <TokenKind>();
if (validExitKeywords != null)
{
validExits.AddRange(validExitKeywords);
}
validExits.Add(TokenKind.MenuKeyword);
HashSet <TokenKind> newEndKeywords = new HashSet <TokenKind>();
if (endKeywords != null)
{
newEndKeywords.AddRange(endKeywords);
}
newEndKeywords.Add(TokenKind.MenuKeyword);
int beforeStart = -1, beforeDecEnd = -1, beforeEnd = -1;
if (parser.PeekToken(TokenKind.BeforeKeyword))
{
parser.NextToken();
beforeStart = parser.Token.Span.Start;
if (parser.PeekToken(TokenKind.MenuKeyword))
{
parser.NextToken();
beforeDecEnd = parser.Token.Span.End;
FglStatement menuStmt;
List <FglStatement> stmts = new List <FglStatement>();
prepStatementBinders.Insert(0, node.BindPrepareCursorFromIdentifier);
while (MenuStatementFactory.TryGetStatement(parser, out menuStmt, containingModule, prepStatementBinders, returnStatementBinder,
limitedScopeVariableAdder, validExits, contextStatementFactories, newEndKeywords))
{
stmts.Add(menuStmt);
beforeEnd = menuStmt.EndIndex;
}
prepStatementBinders.RemoveAt(0);
if (beforeEnd < 0)
{
beforeEnd = beforeDecEnd;
}
MenuOption beforeMenu = new MenuOption(beforeStart, beforeDecEnd, beforeEnd, stmts);
if (beforeMenu != null)
{
node.Children.Add(beforeMenu.StartIndex, beforeMenu);
}
}
else
{
parser.ReportSyntaxError("Expecting \"before\" keyword for menu block.");
}
}
prepStatementBinders.Insert(0, node.BindPrepareCursorFromIdentifier);
while (!parser.PeekToken(TokenKind.EndOfFile) &&
!(parser.PeekToken(TokenKind.EndKeyword) && parser.PeekToken(TokenKind.MenuKeyword, 2)))
{
MenuOption menuOpt;
if (MenuOption.TryParseNode(parser, out menuOpt, containingModule, prepStatementBinders, returnStatementBinder,
limitedScopeVariableAdder, validExits, contextStatementFactories, newEndKeywords) && menuOpt != null)
{
if (menuOpt.StartIndex < 0)
{
continue;
}
node.Children.Add(menuOpt.StartIndex, menuOpt);
}
else if (parser.PeekToken(TokenKind.EndKeyword) && endKeywords != null && endKeywords.Contains(parser.PeekToken(2).Kind))
{
break;
}
else
{
parser.NextToken();
}
}
prepStatementBinders.RemoveAt(0);
if (!(parser.PeekToken(TokenKind.EndKeyword) && parser.PeekToken(TokenKind.MenuKeyword, 2)))
{
parser.ReportSyntaxError("A menu block must be terminated with \"end menu\".");
}
else
{
parser.NextToken(); // advance to the 'end' token
parser.NextToken(); // advance to the 'menu' token
node.EndIndex = parser.Token.Span.End;
}
}
return(result);
}
